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For more information on the idea behind USE flags and how to use them, please see [33]our documentation. __________________________________________________________________ Global USE flags Flag Description X Add support for X11 Xaw3d Add support for the 3d athena widget set a52 Enable support for decoding ATSC A/52 streams used in DVD aac Enable support for MPEG-4 AAC Audio aalib Add support for media-libs/aalib (ASCII-Graphics Library) accessibility Add support for accessibility (eg 'at-spi' library) acl Add support for Access Control Lists acpi Add support for Advanced Configuration and Power Interface adns Add support for asynchronous DNS resolution afs Add OpenAFS support (distributed file system) alsa Add support for media-libs/alsa-lib (Advanced Linux Sound Architecture) altivec Add support for optimizations for G4 and G5/ppc970 processors ao Use libao audio output library for sound playback apache2 Add Apache2 support aqua Include support for the Mac OS X Aqua (Carbon/Cocoa) GUI atm Enable Asynchronous Transfer Mode protocol support appindicator Build in support for notifications using the libindicate or libappindicator plugin audiofile Add support for libaudiofile where applicable audit Enable support for Linux audit subsystem using sys-process/audit ayatana Build in support for Ayatana notification using the libindicate or libappindicator plugin bash-completion Enable bash-completion support berkdb Add support for sys-libs/db (Berkeley DB for MySQL) bidi Enable bidirectional language support big-endian Big-endian toolchain support bindist Flag to enable or disable options for prebuilt (GRP) packages (eg. due to licensing issues) blas Add support for the virtual/blas numerical library bluetooth Enable Bluetooth Support branding Enable Gentoo specific branding build !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used for creating build images and the first half of bootstrapping [make stage1] bzip2 Use the bzlib compression library cairo Enable support for the cairo graphics library calendar Add support for calendars (not using mcal!) canna Add support for the Canna kana to kanji conversion engine caps Use Linux capabilities library to control privilege cdb Add support for the CDB database engine from the author of qmail cdda Add Compact Disk Digital Audio (Standard Audio CD) support cddb Access cddb servers to retrieve and submit information about compact disks cdinstall Copy files from the CD rather than asking the user to copy them, mostly used with games cdr Add support for CD writer hardware cgi Add CGI script support cjk Add support for Multi-byte character languages (Chinese, Japanese, Korean) clamav Add support for Clam AntiVirus software (usually with a plugin) colord Support color management using x11-misc/colord connman Add support for net-misc/connman coreaudio Build the CoreAudio driver on Mac OS X systems cracklib Support for cracklib strong password checking crypt Add support for encryption -- using mcrypt or gpg where applicable css Enable reading of encrypted DVDs cups Add support for CUPS (Common Unix Printing System) curl Add support for client-side URL transfer library custom-cflags Build with user-specified CFLAGS (unsupported) cvs Enable CVS (Concurrent Versions System) integration cxx Build support for C++ (bindings, extra libraries, code generation, ...) dbi Enable dev-db/libdbi (database-independent abstraction layer) support dbm Add support for generic DBM databases dbus Enable dbus support for anything that needs it (gpsd, gnomemeeting, etc) debug Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces dedicated Add support for dedicated game servers (some packages do not provide clients and servers at the same time) dga Add DGA (Direct Graphic Access) support for X djvu Support DjVu, a PDF-like document format esp. suited for scanned documents doc Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally dri Enable direct rendering: used for accelerated 3D and some 2D, like DMA dts Enable DTS Coherent Acoustics decoder support dv Enable support for a codec used by many camcorders dvb Add support for DVB (Digital Video Broadcasting) dvd Add support for DVDs dvdr Add support for DVD writer hardware (e.g. in xcdroast) eds Enable support for Evolution-Data-Server (EDS) elogind Enable session tracking via sys-auth/elogind emacs Add support for GNU Emacs emboss Add support for the European Molecular Biology Open Software Suite encode Add support for encoding of audio or video files examples Install examples, usually source code exif Add support for reading EXIF headers from JPEG and TIFF images expat Enable the use of dev-libs/expat for XML parsing fam Enable FAM (File Alteration Monitor) support fastcgi Add support for the FastCGI interface fbcon Add framebuffer support for the console, via the kernel ffmpeg Enable ffmpeg/libav-based audio/video codec support fftw Use FFTW library for computing Fourier transforms filecaps Use Linux file capabilities to control privilege rather than set*id (this is orthogonal to USE=caps which uses capabilities at runtime e.g. libcap) firebird Add support for the Firebird relational database flac Add support for FLAC: Free Lossless Audio Codec fltk Add support for the Fast Light Toolkit gui interface fontconfig Support for configuring and customizing font access via media-libs/fontconfig fortran Add support for fortran freetds Add support for the TDS protocol to connect to MSSQL/Sybase databases freewnn Add support for FreeWnn kana to kanji conversion engine ftp Add FTP (File Transfer Protocol) support gd Add support for media-libs/gd (to generate graphics on the fly) gdbm Add support for sys-libs/gdbm (GNU database libraries) geoip Add geoip support for country and city lookup based on IPs geolocation Enable physical position determination ggi Add support for media-libs/libggi (non-X video api/drivers) gif Add GIF image support gimp Build a plugin for the GIMP git Enable git (version control system) support gles2-only Use GLES 2.0 or later instead of full OpenGL glut Build an OpenGL plugin using the GLUT library gmp Add support for dev-libs/gmp (GNU MP library) gnome Add GNOME support gnome-keyring Enable support for storing passwords via gnome-keyring gnuplot Enable support for gnuplot (data and function plotting) gnutls Prefer net-libs/gnutls as SSL/TLS provider (ineffective with USE=-ssl) gphoto2 Add digital camera support gpm Add support for sys-libs/gpm (Console-based mouse driver) gps Add support for Global Positioning System graphicsmagick Build and link against GraphicsMagick instead of ImageMagick (requires USE=imagemagick if optional) graphviz Add support for the Graphviz library gsl Use the GNU scientific library for calculations gsm Add support for the gsm lossy speech compression codec gstreamer Add support for media-libs/gstreamer (Streaming media) gtk Add support for x11-libs/gtk+ (The GIMP Toolkit) gtk-doc Build and install gtk-doc based developer documentation for dev-util/devhelp, IDE and offline use gui Enable support for a graphical user interface guile Add support for the guile Scheme interpreter gzip Compress files with Lempel-Ziv coding (LZ77) handbook Enable handbooks generation for packages by KDE hardened Activate default security enhancements for toolchain (gcc, glibc, binutils) hddtemp Enable monitoring of hdd temperature (app-admin/hddtemp) hdf5 Add support for the Hierarchical Data Format v5 headers-only Install only C headers instead of whole package. Mainly used by sys-devel/crossdev for toolchain bootstrap. hscolour Include coloured haskell sources to generated documentation (dev-haskell/hscolour) ibm Add support for IBM ppc64 specific systems iconv Enable support for the iconv character set conversion library icu Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu idn Enable support for Internationalized Domain Names ieee1394 Enable FireWire/iLink IEEE1394 support (dv, camera, ...) imagemagick Enable optional support for the ImageMagick or GraphicsMagick image converter imap Add support for IMAP (Internet Mail Application Protocol) imlib Add support for imlib, an image loading and rendering library infiniband Enable Infiniband RDMA transport support inotify Enable inotify filesystem monitoring support introspection Add support for GObject based introspection iodbc Add support for iODBC library ios Enable support for Apple's iDevice with iOS operating system (iPad, iPhone, iPod, etc) ipod Enable support for iPod device access ipv6 Add support for IP version 6 jack Add support for the JACK Audio Connection Kit java Add support for Java javascript Enable javascript support jbig Enable jbig-kit support for tiff, Hylafax, ImageMagick, etc jemalloc Use dev-libs/jemalloc for memory management jit Enable just-in-time compilation for improved performance. May prevent use of some PaX memory protection features in Gentoo Hardened. joystick Add support for joysticks in all packages jpeg Add JPEG image support jpeg2k Support for JPEG 2000, a wavelet-based image compression format kde Add support for software made by KDE, a free software community kerberos Add kerberos support ladspa Enable the ability to support ladspa plugins lame Prefer using LAME libraries for MP3 encoding support lapack Add support for the virtual/lapack numerical library lash Add LASH Audio Session Handler support latex Add support for LaTeX (typesetting package) lcms Add lcms support (color management engine) ldap Add LDAP support (Lightweight Directory Access Protocol) libass SRT/SSA/ASS (SubRip / SubStation Alpha) subtitle support libcaca Add support for colored ASCII-art graphics libedit Use the libedit library (replacement for readline) libffi Enable support for Foreign Function Interface library libnotify Enable desktop notification support libressl Use dev-libs/libressl instead of dev-libs/openssl when applicable (see also the ssl useflag) libsamplerate Build with support for converting sample rates using libsamplerate libwww Add libwww support (General purpose WEB API) lirc Add support for lirc (Linux's Infra-Red Remote Control) livecd !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during livecd building lm-sensors Add linux lm-sensors (hardware sensors) support lua Enable Lua scripting support luajit Use dev-lang/luajit instead of dev-lang/lua (ineffective with USE=-lua) lzma Support for LZMA (de)compression algorithm lz4 Enable support for lz4 compression (as implemented in app-arch/lz4) lzo Enable support for lzo compression m17n-lib Enable m17n-lib support mad Add support for mad (high-quality mp3 decoder library and cli frontend) magic Add support for file type detection via magic bytes (usually via libmagic from sys-apps/file) maildir Add support for maildir (~/.maildir) style mail spools matroska Add support for the matroska container format (extensions .mkv, .mka and .mks) mbox Add support for mbox (/var/spool/mail) style mail spools memcached Add support for memcached mhash Add support for the mhash library mikmod Add libmikmod support to allow playing of SoundTracker-style music files milter Add sendmail mail filter (milter) support minimal Install a very minimal build (disables, for example, plugins, fonts, most drivers, non-critical features) mmap Add mmap (memory map) support mms Support for Microsoft Media Server (MMS) streams mng Add support for libmng (MNG images) modplug Add libmodplug support for playing SoundTracker-style music files modules Build the kernel modules mono Build Mono bindings to support dotnet type stuff motif Add support for the Motif toolkit mp3 Add support for reading mp3 files mp4 Support for MP4 container format mpeg Add libmpeg3 support to various packages mpi Add MPI (Message Passing Interface) layer to the apps that support it mplayer Enable mplayer support for playback or encoding mssql Add support for Microsoft SQL Server database mtp Enable support for Media Transfer Protocol multilib On 64bit systems, if you want to be able to compile 32bit and 64bit binaries musepack Enable support for the musepack audio codec musicbrainz Lookup audio metadata using MusicBrainz community service (musicbrainz.org) mysql Add mySQL Database support mysqli Add support for the improved mySQL libraries nas Add support for network audio sound ncurses Add ncurses support (console display library) neXt Enable neXt toolkit neon Enable optimization support for ARM NEON processors netcdf Enable NetCDF data format support networkmanager Enable net-misc/networkmanager support nis Support for NIS/YP services nls Add Native Language Support (using gettext - GNU locale utilities) nntp Add support for newsgroups (Network News Transfer Protocol) nocd Install all files required to run the application without a CD mounted nsplugin Build plugin for browsers supporting the Netscape plugin architecture (that is almost any modern browser) ocaml Add support/bindings for the Ocaml language ocamlopt Enable ocamlopt support (ocaml native code compiler) -- Produces faster programs (Warning: you have to disable/enable it at a global scale) oci8 Add Oracle 8 Database Support oci8-instant-client Use dev-db/oracle-instantclient-basic as Oracle provider instead of requiring a full Oracle server install odbc Add ODBC Support (Open DataBase Connectivity) offensive Enable potentially offensive items in packages ofx Enable support for importing (and exporting) OFX (Open Financial eXchange) data files ogg Add support for the Ogg container format (commonly used by Vorbis, Theora and flac) openal Add support for the Open Audio Library openexr Support for the OpenEXR graphics file format opengl Add support for OpenGL (3D graphics) openmp Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp" opus Enable Opus audio codec support oracle Enable Oracle Database support orc Use dev-lang/orc for just-in-time optimization of array operations osc Enable support for Open Sound Control oss Add support for OSS (Open Sound System) pam Add support for PAM (Pluggable Authentication Modules) - DANGEROUS to arbitrarily flip pch Enable precompiled header support for faster compilation at the expense of disk space and memory (>=sys-devel/gcc-3.4 only) pcmcia Add support for PCMCIA slots/devices found on laptop computers pcre Add support for Perl Compatible Regular Expressions pda Add support for portable devices pdf Add general support for PDF (Portable Document Format), this replaces the pdflib and cpdflib flags perl Add optional support/bindings for the Perl language php Include support for the PHP language pie Build programs as Position Independent Executables (a security hardening technique) plasma Build optional KDE plasma addons plotutils Add support for plotutils (library for 2-D vector graphics) png Add support for libpng (PNG images) policykit Enable PolicyKit authentication support portaudio Add support for the crossplatform portaudio audio API posix Add support for POSIX-compatible functions postgres Add support for the postgresql database postscript Enable support for the PostScript language (often with ghostscript-gpl or libspectre) ppds Add support for automatically generated ppd (printing driver) files prefix Defines if a Gentoo Prefix offset installation is used profile Add support for software performance analysis (will likely vary from ebuild to ebuild) pulseaudio Add support for PulseAudio sound server python Add optional support/bindings for the Python language qdbm Add support for the qdbm (Quick Database Manager) library qmail-spp Add support for qmail SMTP plugins qt5 Add support for the Qt 5 application and UI framework quicktime Add support for OpenQuickTime radius Add support for RADIUS authentication raw Add support for raw image formats rdp Enables RDP/Remote Desktop support readline Enable support for libreadline, a GNU line-editing library that almost everyone wants recode Enable support for the GNU recode library rss Enable support for RSS feeds ruby Add support/bindings for the Ruby language samba Add support for SAMBA (Windows File and Printer sharing) sasl Add support for the Simple Authentication and Security Layer savedconfig Use this to restore your config from /etc/portage/savedconfig ${CATEGORY}/${PN}. Make sure your USE flags allow for appropriate dependencies scanner Add support for scanner hardware (e.g. build the sane frontend in kdegraphics) sctp Support for Stream Control Transmission Protocol sdl Add support for Simple Direct Layer (media library) seccomp Enable seccomp (secure computing mode) to perform system call filtering at runtime to increase security of programs selinux !!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur semantic-desktop Cross-KDE support for semantic search and information retrieval session Add persistent session support skey Enable S/Key (Single use password) authentication support slang Add support for the slang text display library (it's like ncurses, but different) slp Add Service Locator Protocol support smartcard Enable smartcard support smp Enable support for multiprocessors or multicore systems snappy Enable support for Snappy compression (as implemented in app-arch/snappy) sndfile Add support for libsndfile snmp Add support for the Simple Network Management Protocol if available soap Add support for SOAP (Simple Object Access Protocol) sockets Add support for tcp/ip sockets socks5 Add support for the socks5 proxy sound Enable sound support source Zip the sources and install them sox Add support for Sound eXchange (SoX) speex Add support for the speex audio codec (used for speech) spell Add dictionary support split-usr Enable behavior to support maintaining /bin, /lib*, /sbin and /usr/sbin separately from /usr/bin and /usr/lib* sqlite Add support for sqlite - embedded sql database ssl Add support for SSL/TLS connections (Secure Socket Layer / Transport Layer Security) startup-notification Enable application startup event feedback mechanism static !!do not set this during bootstrap!! Causes binaries to be statically linked instead of dynamically static-libs Build static versions of dynamic libraries as well subversion Enable subversion (version control system) support suid Enable setuid root program, with potential security risks svg Add support for SVG (Scalable Vector Graphics) svga Add support for SVGAlib (graphics library) symlink Force kernel ebuilds to automatically update the /usr/src/linux symlink syslog Enable support for syslog systemd Enable use of systemd-specific libraries and features like socket activation or session tracking szip Use the szip compression library taglib Enable tagging support with taglib tcl Add support the Tcl language tcmalloc Use the dev-util/google-perftools libraries to replace the malloc() implementation with a possibly faster one tcpd Add support for TCP wrappers telemetry Send anonymized usage information to upstream so they can better understand our users test Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently) theora Add support for the Theora Video Compression Codec threads Add threads support for various packages. Usually pthreads tidy Add support for HTML Tidy tiff Add support for the TIFF image format timidity Build with Timidity++ (MIDI sequencer) support tk Add support for Tk GUI toolkit truetype Add support for FreeType and/or FreeType2 fonts uclibc Enable uclibc specific patches and build or link uclibc udev Enable virtual/udev integration (device discovery, power and storage device support, etc) udisks Enable storage management support (automounting, volume monitoring, etc) unicode Add support for Unicode unwind Add support for call stack unwinding and function name resolution upnp Enable UPnP port mapping support upnp-av Enable UPnP audio/video streaming support upower Enable power management support usb Add USB support to applications that have optional USB support (e.g. cups) v4l Enable support for video4linux (using linux-headers or userspace libv4l libraries) vaapi Enable Video Acceleration API for hardware decoding vala Enable bindings for dev-lang/vala vanilla Do not add extra patches which change default behaviour; DO NOT USE THIS ON A GLOBAL SCALE as the severity of the meaning changes drastically vcd Video CD support vdpau Enable the Video Decode and Presentation API for Unix acceleration interface verify-sig Verify upstream signatures on distfiles vhosts Add support for installing web-based applications into a virtual-hosting environment videos Install optional video files (used in some games) vim-syntax Pulls in related vim syntax scripts vnc Enable VNC (remote desktop viewer) support vorbis Add support for the OggVorbis audio codec wavpack Add support for wavpack audio compression tools wayland Enable dev-libs/wayland backend webkit Add support for the WebKit HTML rendering/layout engine webp Add support for the WebP image format wifi Enable wireless network functions wmf Add support for the Windows Metafile vector image format wxwidgets Add support for wxWidgets/wxGTK GUI toolkit x264 Enable h264 encoding using x264 xattr Add support for extended attributes (filesystem-stored metadata) xcb Support the X C-language Binding, a replacement for Xlib xcomposite Enable support for the Xorg composite extension xemacs Add support for XEmacs xface Add xface support used to allow a small image of xface format to be included in an email via the header 'X-Face' xft Build with support for XFT font renderer (x11-libs/libXft) xine Add support for the XINE movie libraries xinerama Add support for querying multi-monitor screen geometry through the Xinerama API xinetd Add support for the xinetd super-server xml Add support for XML files xmlrpc Support for xml-rpc library xmp Enable support for Extensible Metadata Platform (Adobe XMP) xmpp Enable support for Extensible Messaging and Presence Protocol (XMPP) formerly known as Jabber xosd Sends display using the X On Screen Display library xpm Add support for XPM graphics format xscreensaver Add support for XScreenSaver extension xv Add in optional support for the Xvideo extension (an X API for video playback) xvid Add support for xvid.org's open-source mpeg-4 codec zeroconf Support for DNS Service Discovery (DNS-SD) zip Enable support for ZIP archives zlib Add support for zlib (de)compression zsh-completion Enable zsh completion support zstd Enable support for ZSTD compression Local USE flags acct-user git gitea Set home directory for git hosting via www-apps/gitea. gitolite Set home directory for git hosting via dev-vcs/gitolite or dev-vcs/gitolite-gentoo. app-accessibility brltty api build brltty's application program interface beeper support the console tone generator contracted-braille support in-line contracted braille fm support for the sound card synthesizer louis Use braille tranlator dev-libs/liblouis midi support the musical instrument digital interface pcm support for sound card digital audio speech speech support eflite 16k_voice Use a higher-quality voice. emacspeak espeak Adds support for the espeak tts engine flite voices Install synthetic voices freetts jsapi build Java Speech API (JSAPI) mbrola Adds support for mbrola voices orca braille Enable braille support simon opencv Use media-libs/opencv pim Enable support for KDE PIM resources integration sphinx Build sphinx backend (pulls app-accessibility/julius if disabled speech-dispatcher espeak Adds support for espeak speech engine flite Adds support for flite speech engine app-admin clsync apidoc Provide doxygen generated API docs. cgroups Use cgroups to limit /dev access. clsync Build clsync binary. Most likely you want it. However it is possible to build only libclsync without clsync itself. cluster Enable clustering support (allows master-master clsync on multiple hosts). Not fully implemented yet. control-socket Enable AF_UNIX control socket support. extra-debug Enable extra debugging. This will hurt performance badly. Be ready for tons of output. extra-hardened Enable extra security checks. This will hurt performance. gio Enable GIO for FS monitoring (glib based alternative to inotify interface, not recommended; if both are compiled, may be selected at runtime). highload-locks Allows to use spinlocks for short delays instead of mutexes, but only on SMP systems. namespaces Enable namespaces isolation. socket-library Build the control and monitoring socket library: libclsync. conky apcupsd Enable support for sys-power/apcupsd bundled-toluapp Enable support for bundled toluapp. This only makes sense in combination with the lua-* flags cmus Enable monitoring of music played by media-sound/cmus eve Enable support for the eve-online skill monitor ical Enable support for events from iCalendar (RFC 5545) files using dev-libs/libical iostats Enable support for per-task I/O statistics irc Enable support for displaying everything from an irc channel using net-libs/libircclient lua-cairo Enable if you want Lua Cairo bindings lua-imlib Enable if you want Lua Imlib2 bindings lua-rsvg Enable if you want Lua RSVG bindings math Enable support for glibc's libm math library moc Enable monitoring of music played by media-sound/moc mpd Enable monitoring of music controlled by media-sound/mpd nano-syntax Enable syntax highlighting for app-editors/nano nvidia Enable reading of nvidia card temperature sensors via x11-drivers/nvidia-drivers portmon Enable support for tcp (ip4) port monitoring thinkpad Enable support for IBM/Lenovo notebooks weather-metar Enable support for metar weather service webserver Enable support to act as a webserver serving conkys output using net-libs/libmicrohttpd xmms2 Enable monitoring of music played by media-sound/xmms2 conserver freeipmi Compile in FreeIPMI support via sys-libs/freeipmi diamond mongo Enable MongoDB support redis Enable Redis support diradm automount Support for automount data in LDAP irixpasswd Support for storing separate IRIX passwords doas timestamp Adds support for "persist" feature (experimental) elektra augeas Enable plugin for reading and writing configuration files with help from Augeas ini Enable new, advanced ini support simpleini Enable simpleini support uname Enable uname information for the key database yajl Enable yajl support gkrellm X Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only gnutls Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag) hddtemp Enable monitoring harddrive temperatures via app-admin/hddtemp lm-sensors Enable monitoring sensors via sys-apps/lm-sensors ntlm Enable NTLM authentication for mail checking with net-libs/libntlm ssl Enable SSL support for mail checking with dev-libs/openssl glance swift Adds swift storage support gtkdiskfree gtk2 Support GTK+ 2.x instead of GTK+ 3.x hddtemp network-cron Monthly cronjob to update hddtemp.db. keepass aot Generate native code at build time, rather than runtime. keepassxc autotype Add support to autotype the passwords into other applications browser Enables browser plugin support ccache Use dev-util/ccache to build keepassxc keeshare Enable KeeShare sharing integration network Enable network support yubikey Enable database unlocking via YubiKey. lastpass-cli X Use x11-misc/xclip or x11-misc/xsel to copy passwords to the clipboard. pinentry Use app-crypt/pinentry to prompt for passwords. logrotate acl Installs acl support cron Installs cron file selinux Installs Security Enhanced Linux support logstash-bin x-pack Enable additional features (may need a license) mcollective client Install client utilities mms-agent monitoring Install the monitoring agent openrc-settingsd systemd Use the versions of dbus and polkit files provided by sys-apps/systemd pass X Use x11-misc/xclip to copy passwords to the clipboard. dmenu Add support for x11-misc/dmenu with the 'passmenu' program. fish-completion Enable fish completion support. git Use dev-vcs/git for password revisions. importers Allow importing passwords from other password managers using various contributed scripts. pass-otp qrcode Add support for qrcodes using media-gfx/qrencode passwordsafe minimal Avoid collision with app-misc/pwsafe qr Enable QR code password display xml Enable XML import support xvkbd Install x11-misc/xvkbd on-screen keyboard yubikey Enable support for Yubikey prelude-manager dbx Enables Prelude Manager storing Prelude alerts into database through dev-libs/libpreludedb . tcpwrapper Enables Prelude Manager using tcp wrapper. It requires sys-apps/tcp-wrappers . puppet augeas Enable augeas support diff Enable diff support rrdtool Enable rrdtool support shadow Enable shadow support puppet-agent puppetdb Adds puppetdb support puppetserver puppetdb Adds support for connecting to puppetdb pwgen livecd Install init script for root password scrambling on boot rsyslog clickhouse Build the ClickHouse output module (requires net-misc/curl) curl Enable http_request() function in RainerScript (requires net-misc/curl) dbi Build the general database output module (requires dev-db/libdbi) elasticsearch Build the Elasticsearch output module (requires net-misc/curl) gcrypt Add support for encrypted log files using dev-libs/libgcrypt gnutls Build the GnuTLS network stream driver (requires net-libs/gnutls) imhttp Build the http input module (requires www-servers/civetweb) impcap Build the pcap input module (requires net-libs/libpcap) kafka Build the Apache Kafka input/output module (requires dev-libs/librdkafka) kerberos Build the GSSAPI input and output module (requires virtual/krb5) kubernetes Build the kubernetes modify plugin (requires net-misc/curl) libressl Use dev-libs/libressl instead of dev-libs/openssl (you still need to enable functionality which requires OpenSSL) mdblookup Build the MaxMind DB lookup message modify plugin using dev-libs/libmaxminddb mongodb Build the MongoDB output module (requires dev-libs/mongo-c-driver) mysql Build the MySQL database output module (requires virtual/mysql) normalize Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm) omhttp Build the http output module (requires net-misc/curl) omhttpfs Build the httpfs output module (requires net-misc/curl) omudpspoof Build the udpspoof output module (requires net-libs/libnet) openssl Build the OpenSSL network stream driver (requires dev-libs/openssl) postgres Build the PostgreSQL database output module (requires dev-db/postgresql) rabbitmq Build the RabbitMQ output module (requires net-libs/rabbitmq-c) redis Build the Redis output module using (requires dev-libs/hiredis) relp Build the Reliable Event Logging Protocol (RELP) output module (requires dev-libs/librelp) rfc3195 Build the rfc3195 input module (requires dev-libs/liblogging) rfc5424hmac Build the rfc5424hmac modify module (requires dev-libs/openssl or dev-libs/libressl) snmp Build the snmp modify and output module (requires net-analyzer/net-snmp) ssl Add support for encrypted client/server communication (requires net-libs/gnutls) systemd Build the journal input and output module (requires sys-apps/systemd) usertools Installs the user tools (rsgtutil, rscryutil...) corresponding to the set USE flags uuid Include UUIDs in messages (requires sys-apps/util-linux) xxhash Enable xxHash support in fmhash module (requires dev-libs/xxhash) zeromq Build the ZeroMQ input and output modules (requires net-libs/czmq) sagan libdnet Add support for dev-libs/libdnet lognorm Add support for log/rules normalizations via dev-libs/liblognorm pcap Add support for network packet capture via net-libs/libpcap smtp Build witch SMTP (E-Mail) support snort Add support to interact with Snort IDE using net-analyzer/snortsam' sagan-rules lognorm Install normalize rules support with dev-libs/liblognorm salt cheetah Enable support for dev-python/cheetah3 cherrypy Enable support for using cherrypy. genshi Enable support for dev-python/genshi gnupg Enable support for gnupg via python-gnupg. keyring Enable support for keyrings via python-keyring. libcloud Enable salt-cloud support via libcloud. libvirt Support managing virtual machines with app-emulation/libvirt. mako Add support for using the mako template engine for parsing salt states. mongodb Support returning data to a mongodb server. neutron Support the OpenStack neutron network service. nova Enable support for the OpenStack Nova API openssl Add support for using TLS via OpenSSL. portage Add support for package state enforcement using sys-apps/portage raet Add support for the new RAET transport. redis Support returning data to a redis database. zeromq Add support for the zeromq transport. sudo gcrypt Use message digest functions from dev-libs/libgcrypt instead of sudo's libressl Use message digest functions from dev-libs/libressl instead of sudo's offensive Let sudo print insults when the user types the wrong password secure-path Replace PATH variable with compile time secure paths sendmail Allow sudo to send emails with sendmail sssd Add System Security Services Daemon support sysklogd logger Build the logger program logrotate use app-admin/logrotate for rotating logs rather than custom cron scripts syslog-ng amqp Enable support for AMQP destinations geoip2 Add support for geo lookup based on IPs via dev-libs/libmaxminddb http Enable support for HTTP destinations json Enable support for JSON template formatting via dev-libs/json-c kafka Enable support for Kafka destinations mongodb Enable support for mongodb destinations pacct Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only) redis Enable support for Redis destinations smtp Enable support for SMTP destinations spoof-source Enable support for spoofed source addresses testdisk ewf Include ewf library ntfs Include the ability to read NTFS filesystems reiserfs Include reiserfs reading ability tripwire ssl Adds support for Secure Socket Layer connections static Builds the package statically tools Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database ulogd json Build JSON output plugin to save packets in JSON file format nfacct Build NFACCT input plugin to support traffic accounting via nfnetlink_acct nfct Build NFCT input plugin to support stateful flow-based logging via nfnetlink_conntrack nflog Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_log pcap Build PCAP output plugin to save packets in libpcap file format ulog Build ULOG input plugin to support deprecated packet-based logging via ULOG target vault webui Enable the Web UI webalizer xtended Include the 404 extension webapp-config portage Propagete python_targets dependencies to sys-apps/portage app-antivirus clamav clamdtop A Top like tool which shows what clamd is currently scanning amongst other things clamonacc Build the clamonacc on-access scanner clamsubmit A tool to submit false positives / negatives libclamav-only Bypass building of libfreshclam and the ClamAV CLI applications. metadata-analysis-api Enables collection of file property metadata using ClamAV API for analysis by ClamAV bytecode programs. xml DMG and XAR support clamtk kde Install the Dolphin plugin. nautilus Install the Nautilus plugin. nemo Install the Nemo plugin. thunar Install the Thunar plugin. app-arch cabextract extras Install experimental extra tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file. dpkg libmd Use app-crypt/libmd library for message digest functions update-alternatives Install update-alternatives dump ermt encrypted rmt support uuid Enable UUID support engrampa caja Enable engrampa to integrate with mate-base/caja by providing entries in its context menu packagekit Enable support for installing via Packagekit based on archive type file-roller nautilus Build contextual menu extension for gnome-base/nautilus. packagekit Enable support for the distro-neutral package manager GUI PackageKit gzip pic disable optimized assembly code that is not PIC friendly innoextract debug Enable debug logging and the --debug command-line option lzma Enable support for extracting lzma-compressed installers using app-arch/xz-utils lbzip2 symlink Install symlinks which override app-arch/bzip2 implementation libarchive blake2 Enable Blake2 hash support via app-crypt/libb2. bzip2 Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in. e2fsprogs Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers nettle Use dev-libs/nettle as crypto backend zlib Allow accessing gzip-compressed archives through sys-libs/zlib. This only affects libarchive's native support: bsdtar will keep using gunzip as a filter if that's not built-in. It's also needed for supporting extraction of ZIP files. p7zip rar Enable support for non-free rar decoder pbzip2 symlink Install symlinks which override app-arch/bzip2 implementation pigz symlink Install symlinks which override app-arch/gzip implementation rar all_sfx Install all SFX (Self-Extracting) files rather than just the native format (allows creation of Windows EXEs on Linux ELF systems) tar minimal just install `tar` unzip natspec Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows. wimlib fuse Use fuse libraries iso Install app-cdr/cdrtools in order to prepare iso images ntfs Use libntfs-3g library from sys-fs/ntfs3g openssl Use the SHA-1 message digest from libcrypto instead of compilling another implementation yasm Use yasm assembler instead of nasm xz-utils extra-filters Build additional filters that are not used in any of the default xz presets. This includes delta and BCJ coders, additional match finders and SHA256 checks. zip natspec Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows. app-backup amanda ndmp Support for the NDMP protocol s3 Support for backing up to the Amazon S3 system xfs Support for backing up raw XFS filesystems using xfsdump backup-manager s3 Support for backing up to the Amazon S3 system bacula bacula-clientonly Disable DB support, and just build a client bacula-nodir Disable building of director bacula-nosd Disable building of storage daemon batch-insert Enable batch insert into data base logwatch Install support files for logwatch bareos ceph Enable ceph support cephfs Enable cephfs storage backend clientonly Only install file-daemon (client) director Install director fastlz Enable support vor lz4, lz4hc and lzfast using dev-libs/bareos-fastlzlib glusterfs Enable glusterfs storage backend gnutls When ssl is enabled, use GnuTLS instead of OpenSSL jansson JSON API support using JANSSON for director lmdb enable build of LMDB support for faster accurate backup logwatch Install support files for logwatch ndmp Enable support for NDMP (Network Data Management Protocol) rados Enable rados storage backend rados-striper Enable use of rados-striper scsi-crypto Enable low level SCSI crypto support sql-pooling Enable SQL pooling support storage-daemon Install storage daemon (bareos-sd) btrbk lsbtr Enable the lsbtr command-line tool mbuffer Use sys-block/mbuffer to enable progress bar and buffering/limiting functionality dar dar32 Enables --enable-mode=32 option, which replace infinite by 32 bit integers dar64 Enables --enable-mode=64 option, which replace infinite by 64 bit integers gcrypt Enables strong encryption support gpg Enables usage of asymetric crypto algorithms duplicity s3 Support for backing up to the Amazon S3 system rear udev Have ReaR start backup when attaching your USB drive. snapper lvm Enable LVM thinprovisioned snapshots support sys-fs/lvm2 xattr Add support for getting and setting POSIX extended attributes, through sys-apps/attr. tsm tsm-cit IBM Tivoli Common Inventory Technology tsm-hw Difference snapshot support for NetApp and N-Series file servers zbackup tartool Install tartool utility app-benchmarks filebench auto-completion Enable command-line autocompletion using dev-libs/libtecla httperf idleconn Build with the idleconn program ioping netdata Add support for netdata ramspeed pic Force shared libraries to be built as PIC (this is slower) sysbench aio Enable libaio support app-cdr brasero libburn Enable dev-libs/libburn backend nautilus Build the gnome-base/nautilus extension packagekit Enable support for the distro-neutral package manager GUI PackageKit playlist Enable support for playlists through dev-libs/totem-pl-parser tracker Enable audio playlist search using the app-misc/tracker indexer cdemu cdemu-daemon Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing. dvdisaster debug Enable memory debugging. gaffitter scripts Install additional gaffitter scripts for external programs mirage2iso pinentry Support app-crypt/pinentry password input backend. app-crypt aespipe asm Enable assembly modules cpu_flags_x86_padlock Use VIA padlock instructions, detected at run time, code still works on non-padlock processors ccid kobil-midentity Build and install Kobil_mIDentity_switch tool twinserial Enable twinserial reader codecrypt cryptopp Build algorithms that need Crypto++ support dev-libs/crypto++ dehydrated cron Install cron job to sign/renew non-existent/changed/expiring certificates eid-mw dialogs Enable "askaccess" dialog box, by using x11-libs/gtk+ gtk All dialogs are available, by using x11-libs/gtk+ p11-kit Support for app-crypt/p11-kit. p11v220 Enable PKCS#11 v2.20 features. ekeyd minimal Only install the ekey-egd-linux service rather than the full ekeyd package. munin Install a plugin for net-analyzer/munin to graph statistical data from ekeyd. usb Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems. gnupg smartcard Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd. Bring in dev-libs/libusb as a dependency; enable scdaemon. tofu Enable support for Trust on First use trust model; requires dev-db/sqlite. tools Install extra tools (including gpgsplit and gpg-zip). usb Build direct CCID access for scdaemon; requires dev-libs/libusb. user-socket try a socket directory which is not removed by init manager at session end wks-server Install the wks-server gnupg-pkcs11-scd proxy Build the gnupg-pkcs11-scd-prox gpgme common-lisp Install common-lisp files hashcat brain Enable the hashcat brain heimdal hdb-ldap Adds support for LDAP as a database backend lmdb Add support for using dev-db/lmdb for lookup tables otp Adds support for one-time passwords hmaccalc fips Enable NSS FIPS mode and support only the FIPS-compliant functions johntheripper-jumbo opencl Build with opencl/GPU cracking support pcap Build with pcap support kbfs git Build the Git remote helper for storing repositories in Keybase kstart afs Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app. libb2 native-cflags Use CFLAGS as determined by configure script. These flags will enable all CPU specific features it find available, to further optimise the implementation. This discards any existing CFLAGS set in make.conf or similar. libu2f-host systemd Use user ACLs rather than plugdev group to give user access to the HIDRAW device. mit-krb5 doc Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos keyutils Enable for the keyring ccache using keyutils lmdb Add support for using dev-db/lmdb for lookup tables openldap Enable support for ldap as a database backend pkinit Enable pkinit support for the initial ticket ophcrack tables Require the additional tables used to carry out cracking (app-crypt/ophcrack-tables) ophcrack-tables vistafree Installs the free Vista ophcrack tables xpfast Installs the fast XP ophcrack tables xpsmall Installs the small free XP ophcrack tables p11-kit asn1 Enable ASN.1 certificate support trust Build the trust policy module qca botan Enable botan plugin gcrypt Enable gcrypt plugin gpg Enable GnuPG plugin logger Enable logger plugin nss Enable NSS plugin pkcs11 Enable PKCS#11 plugin sasl Enable SASL plugin softstore Enable softstore plugin seahorse ldap Enable seahorse to manipulate GPG keys on a LDAP server. swtpm fuse Support sys-fs/fuse based /dev/tpm interface tpm-emulator mtm-emulator Build the MTM emulator tpm-tools pkcs11 Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation. tpm2-pkcs11 fapi Enable feature API backend tpm2-tools fapi Enable feature API tools tpm2-totp plymouth Add sys-boot/plymouth support tpm2-tss fapi Enable feature API (requires openssl as crypto backend) gcrypt Use dev-libs/libgcrypt as crypto engine mbedtls Use net-libs/mbedtls as crypto engine openssl Use dev-libs/openssl as crypto engine veracrypt asm Enable assembly for optimization zulucrypt gnome Enable support for the freedesktop.org Secret Service API via app-crypt/libsecret kwallet Enable encrypted storage of passwords with kde-frameworks/kwallet udev Whether udev will be consulted when deciding if a volume is system or not app-dicts aspell-be classic Support classic spelling by default gwaei hunspell Enable app-text/hunspell spellchecking and morphological analysis mecab Enable app-text/mecab support myspell-pt preao Use the pre ortographic agreement version of the dictionary app-doc clsync-docs api Install doxygen generated API docs. csound-manual html Install HTML documentation devmanual offline Use alternative minimal stylesheet instead of Tyrian theme doxygen clang support for sys-devel/clang assisted parsing dot allow to create dot graphs using media-gfx/graphviz doxysearch build doxyindexer and doxysearch.cgi kicad-doc html Generate documentation in HTML format pdf Generate documentation in PDF format linuxfromscratch htmlsingle Install all-on-one-page HTML version. pms html Generate and install PMS as .html as well twoside Enable two-sided layout suitable for printing pms-bin html Install PMS as .html as well tldp-howto html Install multi-chapter HTML docs htmlsingle Install all-on-one-page HTML docs pdf Install pdf docs text Install plain-text docs app-editors bluefish gtk3 Enable GTK3 interface (default) gucharmap Enable gucharmap dictionary plugin spell Enable spell checking capabilities via enchant library emacs athena Enable the MIT Athena widget set (x11-libs/libXaw) dynamic-loading Enable loading of dynamic libraries at runtime games Support shared score files for games gconf Use gnome-base/gconf to read the system font name gfile Use gfile (dev-libs/glib) for file notification gsettings Use gsettings (dev-libs/glib) to read the system font name gtk2 Prefer version 2 of the GIMP Toolkit to version 3 (x11-libs/gtk+) gzip-el Compress bundled Emacs Lisp source harfbuzz Use media-libs/harfbuzz as text shaping engine imagemagick Use media-gfx/imagemagick for image processing json Compile with native JSON support using dev-libs/jansson libxml2 Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations mailutils Retrieve e-mail using net-mail/mailutils instead of the internal movemail substitute source Install C source files and make them available for find-function threads Add elisp threading support toolkit-scroll-bars Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars wide-int Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size. xwidgets Enable use of GTK widgets in Emacs buffers (requires GTK3) fe sendmail Send mail after editor abend gedit-plugins charmap Insert special characters just by clicking on them git Shows document changes related to git's HEAD terminal Embed a terminal in the bottom pane gnome-latex latexmk Install dev-tex/latexmk (used by default for the build tools) rubber Install dev-tex/rubber (can be used for the build tools) gvim cscope Enable cscope interface gtk2 Enable GTK+2 interface netbeans Include netbeans external editor integration support racket Enable support for Scheme using dev-scheme/racket jasspa-microemacs nanoemacs Build NanoEmacs instead of MicroEmacs joe xterm Enable full xterm clipboard support leafpad emacs Enable Emacs key theme mousepad gtk3 Use GTK+3 instead of GTK+2 nano debug Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility. justify Enable justify/unjustify functions for text formatting. magic Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting minimal Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling). split-usr Enable this if /bin and /usr/bin are separate directories ne tinfo Link against libtinfo from sys-libs/ncurses neovim lto Build with Link Time Optimization (LTO) nvimpager Install nvimpager symlink to less.sh macro tui Build the neovim unix tui okteta designer Build plugins for dev-qt/designer qhexedit2 gui Install Qt5 hex editor tea aspell Enable spellchecking using app-text/aspell hunspell Enable spellchecking using app-text/hunspell qml Enable support for plugins using QML vim X Link console vim against X11 libraries to enable title and clipboard features in xterm cscope Enable cscope interface racket Enable support for Scheme using dev-scheme/racket terminal Enable terminal emulation support vim-pager Install vimpager and vimmanpager links vis tre more memory efficient regex search using dev-libs/tre xemacs athena Chooses the MIT Athena widget set dnd Enables support for the x11-libs/dnd drag-n-drop library eolconv Support detection and translation of newline conventions mule Add multi-language support to XEmacs pop Support POP for mail retrieval xim Enable X11 XiM input method zile valgrind Enable usage of dev-util/valgrind in tests app-emacs auctex preview-latex Use bundled preview-latex bbdb tex Install plain TeX support files vm Add support for app-emacs/vm calfw howm Add support for the app-emacs/howm note-taking tool elscreen wanderlust Include support for app-emacs/wanderlust emacs-common-gentoo games Support shared score files for games emacs-w3m gzip-el Compress bundled Emacs Lisp source mu-cite bbdb Include support for app-emacs/bbdb org-mode contrib Install user-contributed files odt-schema Install non-free schema files for OpenDocument Text exporter remember bbdb Include support for app-emacs/bbdb planner Include support for app-emacs/planner slime xref Install xref.lisp cross-referencing tool vm bbdb Include support for app-emacs/bbdb wanderlust bbdb Include support for app-emacs/bbdb wikipedia-mode outline-magic Enable support for outline-mode extensions (app-emacs/outline-magic) app-emulation aranym clipboard Enable bidirectional clipboard transfer between the host and FreeMiNT jit Build Just-In-Time compiler variant with increased performance lilo Enable support for directly booting kernels such as Linux osmesa Allow images to be rendered in memory using the host CPU pmmu Build full PMMU variant, required for running mainline Linux standard Build standard (no JIT or PMMU) variant bochs 3dnow Enable support for emulating 3DNow! instructions (incomplete) avx Enable support for emulating Advanced Vector Extensions (AVX) debugger Enable debugger (slows down emulation) gdb Enable support for the remote GDB stub x86-64 Enable support for emulation of 64-bit CPUs containerd apparmor Support for AppArmor btrfs Support for BTRFS snapshot driver cri Support for Kubernetes CRI device-mapper Support for device mapper snapshot driver containers-storage btrfs Enables dependencies for the "btrfs" graph driver, including necessary kernel flags. device-mapper Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags. cri-o btrfs Enables dependencies for the "btrfs" graph driver, including necessary kernel flags. device-mapper Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags. crossover-bin capi Enable ISDN support via CAPI opencl Enable OpenCL support osmesa Add support for OpenGL in bitmaps using libOSMesa pcap Support packet capture software (e.g. wireshark) vulkan Enable Vulkan drivers crun bpf Enable in Kernel, eBPF (enhanced Berkley Packet Filter) support for managing device controllers. criu Enable CRIU based checkpoint/restore support man Build and install man pages docker apparmor Enable AppArmor support. aufs Enables dependencies for the "aufs" graph driver, including necessary kernel flags. btrfs Enables dependencies for the "btrfs" graph driver, including necessary kernel flags. container-init Makes the a staticly-linked init system tini available inside a container. device-mapper Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags. overlay Enables dependencies for the "overlay" graph driver, including necessary kernel flags. docker-credential-helpers gnome-keyring Build secretservice helper which works with gnome-keyring or kwallet using D-Bus. pass Build pass helper for the pass utility. dosemu fluidsynth use media-sound/fluidsynth for MIDI emulation faudio dumpvoices FAudio dumps buffer data to individual files with RIFF/XWMA headers, usable with players like ffplay/testxwma. ffmpeg FAudio has optional support for decoding xWMA resources using FFmpeg, requiring: media-video/ffmpeg test Build and run faudio testsuite. utils Build all faudio utilities. xnasong Build support for optional XNG_SONG component (note: this not required by app-emulation/wine-staging, app-emulation/wine-vanilla for faudio XAudio support). fs-uae fmv Enable support for CD32 FMV (full motion video) glew Enable support for The OpenGL Extension Wrangler Library (media-libs/glew) fs-uae-launcher lha Enable LHA archive support fuse backend-X Use X11 rendering backend backend-fbcon Use framebuffer rendering backend backend-sdl Use SDL rendering backend backend-svga Use svgalib rendering backend memlimit Add compile-time memory usage limiting fuse-utils gcrypt Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles. hyperd libvirt Enable support for KVM via libvirt xen Enable support for the Xen Hypervisor libcacard passthrough Enable smartcard passthrough support via sys-apps/pcsc-lite libguestfs erlang Build Erlang bindings fuse Enable image mount support via fuse inspect-icons Use media-gfx/icoutils for acces icon file in image and inspect it libvirt Use app-emulation/libvirt to manipulate VMs systemtap Use dev-util/systemtap to inspect VM via "probes" way libpod apparmor Enable AppArmor support. btrfs Enables dependencies for the "btrfs" graph driver, including necessary kernel flags. fuse Enables fuse dependencies (fuse-overlayfs is especially useful for rootless mode). rootless Enables dependencies for running in rootless mode. libspectrum gcrypt Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles. libvirt apparmor Enable AppArmor support dtrace Enable dtrace support via dev-util/systemtap firewalld DBus interface to iptables/ebtables allowing for better runtime management of your firewall. fuse Allow LXC to use sys-fs/fuse for mount points glusterfs Enable GlusterFS support via sys-cluster/glusterfs iscsi Allow using an iSCSI remote storage server as pool for disk image storage iscsi-direct Allow using libiscsi for iSCSI storage pool backend libssh Use net-libs/libssh to communicate with remote libvirtd hosts, for example: qemu+libssh://server/system libvirtd Builds the libvirtd daemon as well as the client utilities instead of just the client utilities lvm Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage lxc Support management of Linux Containers virtualisation (app-emulation/lxc) macvtap Support for MAC-based TAP (macvlan/macvtap). For networking instead of the normal TUN/TAP. nfs Allow using Network File System mounts as pool for disk image storage numa Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad openvz Support management of OpenVZ virtualisation (openvz-sources) parted Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them. pcap Support auto learning IP addreses for routing qemu Support management of QEMU virtualisation (app-emulation/qemu) rbd Enable rados block device support via sys-cluster/ceph vepa Virtual Ethernet Port Aggregator (VEPA) / 802.1Qbg support. Relies on macvtap support. virt-network Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable). virtualbox Support management of VirtualBox virtualisation (app-emulation/virtualbox) wireshark-plugins Build the net-analyzer/wireshark plugin for the Libvirt RPC protocol xen Support management of Xen virtualisation (app-emulation/xen) zfs Enable ZFS backend storage sys-fs/zfs lxc apparmor Enable AppArmor support man Build manpages templates Install old style templates through app-emulation/lxc-templates tools Build and install additional command line tools lxd apparmor Enable AppArmor support nemu network-map Adds possibility of exporting network map to SVG ovf Adds support for OVA/OVF import savevm Adds support for QEMU savevm snapshots (experimental, QEMU must be patched) spice Adds Spice protocol support vnc-client Adds support for external VNC client open-vm-tools deploypkg Build deploypkg plugin dnet Enable support for nicinfo doc Generate API documentation fuse Enable vmblock-fuse/vmhgfs-fuse gtkmm Compile with Gtkmm and sigc++ (Recommended) multimon Enable multimon (Requires X) resolutionkms Build the linux/unix resolutionkms module vgauth Build vgauth pcem networking Enable support for emulation of network cards. punes cg Add support for Nvidia CG Toolkit q4wine ico Enable ico support via media-gfx/icoutils iso Support unprivileged mounting of ISO9660 images via sys-fs/fuseiso wineappdb Enable Wine AppDB browser support qemu accessibility Adds support for braille displays using brltty aio Enables support for Linux's Async IO alsa Enable alsa output for sound emulation capstone Enable disassembly support with dev-libs/capstone curl Support ISOs / -cdrom directives vis HTTP or HTTPS. fdt Enables firmware device tree support glusterfs Enables GlusterFS cluster fileystem via sys-cluster/glusterfs gnutls Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support. For 2.0 through 2.3 also enables disk quorum support. io-uring Enable efficient I/O via sys-libs/liburing. iscsi Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does. jemalloc Enable jemalloc allocator support jpeg Enable jpeg image support for the VNC console server multipath Enable multipath persistent reservation passthrough via sys-fs/multipath-tools. ncurses Enable the ncurses-based console nfs Enable NFS support numa Enable NUMA support pin-upstream-blobs Pin the versions of BIOS firmware to the version included in the upstream release. This is needed to sanely support migration/suspend/resume/snapshotting/etc... of instances. When the blobs are different, random corruption/bugs/crashes/etc... may be observed. plugins Enable qemu plugin API via shared library loading. png Enable png image support for the VNC console server pulseaudio Enable pulseaudio output for sound emulation rbd Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD sdl Enable the SDL-based console sdl-image SDL Image support for icons slirp Enable TCP/IP in hypervisor via net-libs/libslirp spice Enable Spice protocol support via app-emulation/spice ssh Enable SSH based block device support via net-libs/libssh2 static Build the User and Software MMU (system) targets as well as tools as static binaries static-user Build the User targets as static binaries systemtap Enable SystemTAP/DTrace tracing usb Enable USB passthrough via dev-libs/libusb usbredir Use sys-apps/usbredir to redirect USB devices to another machine over TCP vde Enable VDE-based networking vhost-net Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet vhost-user-fs Enable shared file system access using the FUSE protocol carried over virtio. virgl Enable experimental Virgil 3d (virtual software GPU) virtfs Enable VirtFS via virtio-9p-pci / fsdev. See http://wiki.qemu.org/Documentation/9psetup vte Enable terminal support (x11-libs/vte) in the GTK+ interface xattr Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend. xen Enables support for Xen backends xfs Support xfsctl() notification and syncing for XFS backed virtual disks. xkb Depend on x11-libs/libxkbcommon to build qemu-keymap tool for converting xkb keymaps qt-virt-manager smartcard Enable smartcard remoting using app-emulation/libcacard runc ambient Enable support for ambient capabilities set (Requires Linux kernel 4.3 or later). apparmor Enable AppArmor support. kmem Enable Kernel Memory Accounting. runv libvirt Enable support for KVM via libvirt xen Enable support for the Xen Hypervisor ski debug enable extra binary emulation debugging via sys-libs/binutils-libs skopeo btrfs Enables dependencies for the "btrfs" graph driver. spice smartcard Enable smartcard remoting using app-emulation/libcacard vagrant virtualbox Use VirtualBox provider. vice ethernet Enable ethernet emulation headless Include the headless variant of the emulator mpg123 Enable mp3@64 cartridge support parport Enable parallel port SID support pci Enable PCI device discovery using sys-apps/pciutils virt-manager policykit Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication sasl Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances). virt-viewer libvirt Support connecting to virtual machines managed by libvirt. spice Support connecting to SPICE-enabled virtual machines. vnc Support connecting to VNC-enabled virtual machines. virt-what dmi Use sys-apps/dmidecode to read firmware data virtualbox dtrace Install dtrace Extension Pack headless Build without any graphic frontend lvm Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2. pax_kernel Apply patch needed for pax enabled kernels. sdk Enable building of SDK udev Controls installation of special USB udev rules. vboxwebsrv Build and install the VirtualBox webservice virtualbox-modules pax_kernel Apply patch needed for pax enabled kernels vkd3d spirv-tools Enable SPIRV shader debugging support using dev-util/spirv-tools wine-staging capi Enable ISDN support via CAPI custom-cflags Bypass strip-flags; use at your own peril dos Pull in games-emulation/dosbox to run DOS applications faudio Pull in app-emulation/faudio to provide XAudio2 functionality gcrypt Add support for the Diffie-Hellman key exchanges using dev-libs/libgcrypt gecko Add support for the Gecko engine when using iexplore gssapi Use GSSAPI (Kerberos SSP support) gstreamer Use media-libs/gstreamer to provide DirectShow functionality; mono Add support for .NET using Wine's Mono add-on netapi Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll opencl Enable OpenCL support osmesa Add support for OpenGL in bitmaps using libOSMesa pcap Support packet capture software (e.g. wireshark) perl Install helpers written in perl (winedump/winemaker) pipelight Apply Wine-Staging patches for Pipelight/Silverlight support prelink Run prelink on DLLs during build; For Gentoo hardened, do not disable if you do not know what this means as it can break things at runtime realtime Pull in sys-auth/rtkit for low-latency pulseaudio support run-exes Use Wine to open and run .EXE and .MSI files samba Add support for NTLM auth. See: https://web.archive.org/web/20160108123008/http://wiki.winehq.org:80/Nt lmAuthSetupGuide and https://web.archive.org/web/20150906013746/http://wiki.winehq.org/NtlmS igningAndSealing (these pages are not currently in the updated WineHQ Wiki). sdl Add support for gamepad detection using SDL staging Apply Wine-Staging patches for advanced feature support that haven't made it into upstream Wine yet themes Support GTK+:3 window theming through Wine-Staging udev Use virtual/libudev to provide plug and play support unwind Use sys-libs/libunwind to unwind the stack vkd3d Use app-emulation/vkd3d to provide Direct3D 12 support vulkan Enable Vulkan drivers wine-vanilla capi Enable ISDN support via CAPI custom-cflags Bypass strip-flags; use at your own peril dos Pull in games-emulation/dosbox to run DOS applications faudio Pull in app-emulation/faudio to provide XAudio2 functionality gecko Add support for the Gecko engine when using iexplore gssapi Use GSSAPI (Kerberos SSP support) gstreamer Use media-libs/gstreamer to provide DirectShow functionality; mono Add support for .NET using Wine's Mono add-on netapi Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll opencl Enable OpenCL support osmesa Add support for OpenGL in bitmaps using libOSMesa pcap Support packet capture software (e.g. wireshark) perl Install helpers written in perl (winedump/winemaker) prelink Run prelink on DLLs during build; For Gentoo hardened, do not disable if you do not know what this means as it can break things at runtime realtime Pull in sys-auth/rtkit for low-latency pulseaudio support run-exes Use Wine to open and run .EXE and .MSI files samba Add support for NTLM auth. See: https://web.archive.org/web/20160108123008/http://wiki.winehq.org:80/Nt lmAuthSetupGuide and https://web.archive.org/web/20150906013746/http://wiki.winehq.org/NtlmS igningAndSealing (these pages are not currently in the updated WineHQ Wiki). sdl Add support for gamepad detection using SDL udev Use virtual/libudev to provide plug and play support unwind Use sys-libs/libunwind to unwind the stack vkd3d Use app-emulation/vkd3d to provide Direct3D 12 support vulkan Enable Vulkan drivers winetricks rar Pull in app-arch/unrar for extraction of rar-compressed game files x48 readline Enables support for libreadline xe-guest-utilities xenstore Use xenstore binaries bundled by Citrix instead of building app-emulation/xen-tools xen efi Adds efi boot support, requires LDFLAG -melf_x86_64 for amd64 flask Enable the Flask XSM module from NSA xen-tools api Build the C libxenapi bindings flask Enable the Flask XSM module from NSA hvm Enable support for hardware based virtualization (VT-x,AMD-v) ipxe Enable ipxe support ocaml Enable support for the ocaml language ovmf Enable support to boot UEFI guest vm, needed by hvm pygrub Install the pygrub boot loader qemu Enable IOEMU support via the use of qemu-dm qemu-traditional Build the old qemu traditional device model (useful only if you cannot change to the new device model e.g. Windows VMs) rombios Enable rombios support, needed by ipxe screen Enable support for running domain U console in an app-misc/screen session system-ipxe Using sys-firmware/ipxe instead of the bundled one system-qemu Using app-emulation/qemu instead of the bundled one system-seabios Using sys-firmware/seabios instead of the bundled one xtrs ls-dos Install LS-DOS disk images for Model 4P app-eselect eselect-php fpm Enable the FastCGI Process Manager SAPI app-forensics afflib fuse Enable extra fuse thingies qemu Enable qemu stuff s3 Enable support for Amazon S3 aide curl Use curl for http,https and ftp backends e2fs Enable support for checking file attributes on ext2/ext3/ext4 filesystems postgres Use postgresql library for storing databases prelink Bypass prelinking when calculating checksums chkrootkit cron Install cron script for weekly rootkit scans honggfuzz clang Enable clang support (pull sys-libs/blocksruntime dependency). libewf bfio Enables libbfio for chaining file in file handling fuse Enable fuse support for ewfmount uuid Enable UUID support in the ewftools quickfuzz archs support archive formats codes support cource code formats docs support document formats imgs support image formats media support media formats net support networking formats pki support PKI formats sleuthkit aff Enable extra aff formats ewf Enable libewf support app-i18n anthy canna-2ch Enable support for app-dicts/canna-2ch canna canuum Build canuum fcitx autostart Enable XDG-compatible autostart of Fcitx enchant Enable Enchant backend (using app-text/enchant) for spelling hinting gtk2 Install input method module for GTK+ 2 gtk3 Install input method module for GTK+ 3 opencc Enable OpenCC engine (using app-i18n/opencc) for converter between Simplified Chinese and Traditional Chinese pango Enable support for x11-libs/pango table Install table input methods for Simplified Chinese fcitx-libpinyin dictionary-manager Install dictionary manager fcitx-rime configuration_tool Install configuration tool fcitx-unikey macro-editor Install macro editor freewnn uum Build uum ibus emoji Enable support for Emoji gtk2 Enable support for x11-libs/gtk+:2 unicode Enable support for Unicode choice ibus-chewing gconf Enable support for gnome-base/gconf ibus-handwrite zinnia Enable support for app-i18n/zinnia ibus-libpinyin boost Compile against dev-libs/boost libraries opencc Enable support for app-i18n/opencc ibus-m17n gtk2 Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 ibus-pinyin boost Enable support for dev-libs/boost ibus-sunpinyin gui Install graphical user interface tool (ibus-setup-sunpinyin) ibus-unikey gtk2 Enable support for x11-libs/gtk+:2 im-chooser gtk2 Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 xfce Enable support for XFCE panel imsettings gconf Enable support for gnome-base/gconf gtk2 Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 xfconf Enable support for xfce-base/xfconf librime debug Enable debugging (including logging of input of RIME input methods) mozc fcitx4 Enable support for app-i18n/fcitx 4 gui Install graphical user interface tool (mozc_tool) handwriting-tegaki Use handwriting recognition model from app-i18n/tegaki-zinnia-japanese by default handwriting-tomoe Use handwriting recognition model from app-i18n/zinnia-tomoe by default ibus Enable support for app-i18n/ibus renderer Enable native candidate window pyzy boost Enable support for dev-libs/boost doc Generate API documentation opencc Enable support for app-i18n/opencc rime-data extra Install extra packages scim gtk3 Enable support for x11-libs/gtk+:3 scim-anthy gtk3 Enable support for x11-libs/gtk+:3 kasumi Use Anthy dictionary maintenance tool (app-dicts/kasumi) scim-sunpinyin gtk3 Enable support for x11-libs/gtk+:3 tomoe hyperestraier Enable support for app-text/hyperestraier uim anthy Enable support for app-i18n/anthy eb Enable support for dev-libs/eb gtk2 Enable support for x11-libs/gtk+:2 skk Enable support for app-i18n/skk-jisyo app-laptop hdapsd libconfig Require dev-libs/libconfig to allow the daemon to read a configuration file at startup ibam gkrellm Enable building of app-admin/gkrellm module laptop-mode-tools apm Add APM (Advanced Power Management) support pbbuttonsd ibam Enable support for Intelligent Battery Monitoring macbook Enable support for the Macbook and Macbook Pro thinkfan atasmart include libatasmart support to get disc temperature nvidia allow thinkfan to read GPU temperature from the proprietary nVidia driver yaml use YAML format for config file tp_smapi hdaps Install a compatible HDAPS module app-metrics collectd contrib Install user-contributed files in the doc directory filecaps When set collectd daemon will have set required capabilities to run most plugins even if run as unprivileged user java Must be set (workaround for java-pkg-opt-2 eclass limitation) when you want java or genericjmx plugin udev Enable optional udev usage in disk plugin; Required for smart plugin xfs Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs app-misc anki recording Enable support for audio recording sound Enable support for adding sound to cards blink1 mini-tool Build and install command-line mini-tool blink1-mini-tool (normally used for embedded devices) server Build and install REST API server (currently hard-coded to TCP port 8080) tool Build and install command-line tool blink1-tool byobu screen Use app-misc/screen as the default backend ca-certificates cacert Include root certificates from CAcert (http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/) carbon-c-relay lz4 add support for LZ4 compressed transport oniguruma use dev-libs/oniguruma as regex implementation pcre2 use dev-libs/libpcre2 as regex implementation snappy add support for Snappy compressed transport ddccontrol pci enable direct PCI memory access (the setuid ddcpci util) ddcutil drm Use x11-libs/libdrm for more verbose diagnostics. usb-monitor Adds support for monitors attached via USB. user-permissions Adds a udev rules to allow non-root users in the i2c group to access the /dev/i2c-* devices. If usb-monitor is selected, users will need to be added to the video group to access the USB monitor. Otherwise, only root will be able to use ddcutil. digitemp ds2490 Build support for the ds2490 sensor ds9097 Build support for the ds9097 sensor ds9097u Build support for the ds9097u sensor elasticsearch x-pack Enable additional features (may need a license) emelfm2 ansi Add support for ANSI escape sequences gtk3 Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2 g810-led hidapi Use dev-libs/hidapi instead of virtual/libusb for talking to the device (advertised to be faster) gcstar stats Enable statistics reporting tellico Enable support for kde-misc/tellico files geoclue modemmanager Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager. zeroconf Enable retrieval of GPS location from Android devices with https://wiki.gnome.org/Apps/GeoclueShare gramps geo Enable rendering of geographical data using sci-geosciences/osm-gps-map rcs Adds support for family tree archives via dev-vcs/rcs reports All external software that is needed for graphical reports will be installed graphlcd-base fontconfig Add support for media-libs/fontconfig font names. freetype Add support for media-libs/freetype. graphicsmagick Add support for media-gfx/graphicsmagick. imagemagick Add support for media-gfx/imagemagick. irtrans-irserver mono Enable mono support jq oniguruma Use dev-libs/oniguruma for regular expression support kryoflux-dtc demos Install example floppy game files. fast-firmware Install fast firmware instead of slow firmware. lcd4linux apm Enable the APM plugin. asterisk Enable the Asterisk plugin. button-exec Enable the Button plugin, to execute something on keypress. cpuinfo Enable the cpuinfo plugin. dbus Enable the dbus plugin. diskstats Enable the diskstats plugin. dmalloc Enable dmalloc for debugging. dvb Enable support for the DVB plugin. event Enable the event plugin. exec Enable the exec plugin, to read output from external programs. fifo Enable the FIFO (First-In, First-Out) plugin. file Enable the file plugin, to read from input from files. gps Enable the gps plugin, for reading gps coordinates. hddtemp Enable the hddtemp plugin, to read from the hddtemp daemon. huawei Enable the huawei plugin, to read from a huawei device. i2c-sensors Enable the i2c_sensors plugin, to read sensor data. iconv Enable the iconv plugin, to convert between encodings. isdn Enable the isdn plugin, to get information about ISDN. kvv Enable the kvv plugin, to get realtime train schedule from the Karlsruher Verkehrsverbund. loadavg Enable the loadavg plugin, to get stats load meminfo Enable the meminfo plugin, to get memory statistics. mpd Enable the mpd plugin, to read from the Music Player Daemon. mpris-dbus Enable the mpris plugin, to read data via dbus for mpris. mysql Enable the mysql plugin, to get mysql database information. netdev Enable the netdev plugin, to get interface statistics. netinfo Enable the netinfo plugin, to get more interface statistic. outb Enable raw i/o access. pop3 Enable the pop3 plugin, to get notified about new mails. proc-stat Enable the proc_stat plugin, to read data from the proc file system. python Enable support for dev-lang/python and enable the python plugin, to execute own python scripts. qnaplog Enable the qnaplog plugin, to read a log from a QNAP device. raspi Enable the raspi plugin, to read sensor data from a Raspberry Pi. sample Enable the sample plugin. statfs Enable the statfs plugin, to get statistics about the file system. uname Enable the uname plugin, to get the output of uname. uptime Enable the uptime plugin. w1retap Enable the w1retap plugin. wireless Enable the wireless plugin, to get wireless statistics. lcdproc ethlcd Enable support for ethlcd in the hd44780 driver. extra-charmaps Enable extra language specific charmaps. freetype Enable support for media-libs/freetype in the glcd driver. menu Enable menu support in the lcdproc client. nfs Display NFS filesystem stats in the lcdproc client. png Enable support for media-libs/libpng in the glcd driver. samba Display SMBFS filesystem stats in the lcdproc client. test-menu Enable test menu support for the lcdproc server. lirc audio Support using an audio device connected to an IR receiver devinput Support the devinput input device ftdi Support FTDI devices gtk Include GTK support which enables the use of lirc-setup inputlirc Add a dependency on app-misc/inputlircd uinput Enable support for uinput mc edit Compile and install the mcedit application sftp Add support for sftp (uses net-libs/libssh2 for it). slang Use sys-libs/slang instead of sys-libs/ncurses. xdg Toggles mc's config dir location. Enable for $XDG_CONFIG_HOME/mc, disable for $HOME/.mc mosquitto bridge Enable bridge support in the MQTT broker. persistence Store messages and subscriptions to a file. srv Include SRV lookup support. websockets Support the WebSocket protocol. muttprint doc Builds documentation neofetch X Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal note general Add support for ascii flatfile backend text Add support for text backend pax-utils python Install a more powerful/faster version of lddtree recoll camelcase Enable indexing for camelCase sentences and words chm Enable CHM file support via dev-python/pychm inotify Use the Linux Kernel notification subsystem for monitoring file alterations in realtime session Stop monitoring file alterations when X11 session terminates webengine Use dev-qt/qtwebengine for fancy result list display rlwrap debug Enable debug screen multiuser Enable multiuser support (by setting correct permissions) nethack Express error messages in nethack style screenfetch X Use the media-gfx/scrot package to take screenshots skim tmux Install sk-tmux script to run skim in a tmux pane vim Install vim plugin for skim sphinx id64 use 64-bit document and word IDs mariadb Add mariadb database support re2 use the dev-libs/re2 regular expression library stemmer Enable language stemming support task sync Enable "task sync" support tmux utempter Include libutempter support towitoko moneyplex Makes libtowitoko work for the moneyplex home banking software tracker miners Install the app-misc/tracker-miners package for actual data mining support for tracker stemmer Add word stemming via dev-libs/snowball-stemmer. tracker-miners cue Enable cue sheet parsing gsf Enable gnome-extra/libgsf based data extractor and for ODT. iptc Enable extraction of IPTC data from pictures iso Enable extraction of metadata from ISO disk images playlist Add support for playlists xps Add support for XPS file format through app-text/libgxps. unfoo minimal Do not install all support archive binaries vcontrold man Build the manpages vclient Build the vclient helper program to talk to vcontrold vsim Build the vsim helper program (simulates the heating's answers, for development and debugging) vifm developer Enable features of interest to developers extended-keys Support for extended keys (arrows, home etc) gtk Use gtk+ to determine mimetypes vim Install the vifm vim plugin and vim-compatible documentation worker avfs Enable support for sys-fs/avfs zygrib maps Installs additional GSHHS maps for high resolution coastline data and cities app-mobilephone adb-sync channel Install the adb-channel script gammu bluetooth Enables bluetooth support curl Enables curl support irda Enables infrared support mysql Use mysql for data storage nls Enable native language support odbc Use ODBC as DB connector postgres Use PostgreSQL for data storage usb Enable USB suport gnokii ical Enable support for dev-libs/libical irda Enable infrared support pcsc-lite Enable smartcard support with sys-apps/pcsc-lite sms Enable SMS support (build smsd) smstools stats Enable statistic reporting app-office abiword collab Enable collaborative editing plugin goffice Enable goffice plugin grammar Enable grammar checking via dev-libs/link-grammar map Enable world map support through media-libs/libchamplain math Enable support for x11-libs/gtkmathview ots Enable Text Summarizer plugin plugins Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this. redland Enables support redland and raptor libs. thesaurus Enable thesaurus support wordperfect Enable wordperfect file support via app-text/libwpd calligra activities Enable kactivities support charts Build chartshape plugin for creating business charts with dev-libs/kdiagram gemini Enable tablet and 2:1 devices support import-filter Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote lcms Build colorengine plugins using media-libs/lcms okular Enable bindings for kde-apps/okular phonon Build stage/eventplugins and videoshape plugin using media-libs/phonon spacenav Enable support for the 3Dconnexion spacenav input device via dev-libs/libspnav calligraplan activities Enable kactivities support holidays Enable kde-frameworks/kholidays integration kwallet Enable access to encrypted OpenDocument files with kde-frameworks/kwallet storage glabels barcode Enable barcode support through external libraries. gnucash aqbanking Connect to some internet banks via AqBanking quotes Enable Online Stock Quote retrieval register2 Use the new register (Experimental) gnumeric libgda Enable database support through gnome-extra/libgda. perl Enable perl plugin loader. grisbi goffice enable goffice graphic support kexi experimental Enable features deemed experimental by upstream marble Enable displaying of maps using kde-apps/marble mdb Enable support for Microsoft Access database webkit Enable web form designer widget using dev-qt/qtwebkit kmymoney activities Enable kde-frameworks/kactivities integration addressbook Enable kde-apps/akonadi contact integration hbci Enable HBCI support using net-libs/aqbanking holidays Enable kde-frameworks/kholidays integration quotes Enable Online Stock Quote retrieval kraft pim Enable support for KDE PIM resources integration libreoffice base Enable full support for LibreOffice Base databases (involves additional bundled libs) coinmp Use sci-libs/coinor-mp as alternative solver googledrive Enable support for remote files on Google Drive mariadb Prefer mariadb connector over mysql connector odk Build the Office Development Kit pdfimport Enable PDF import via the Poppler library libreoffice-l10n offlinehelp Install help files locally instead of using the LibreOffice Wiki lyx aspell Add support for aspell spellchecking dia Add support for diagrams (app-office/dia) docbook Add support for docbook export dot Add support for DOT import (media-gfx/graphviz) enchant Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX). gnumeric Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX. html Add support for HTML import hunspell Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell. monolithic-build This should speed up compilation significantly when you have enough RAM (> 600 MB) rcs Add support for revision control via dev-vcs/rcs rtf Add support for RTF import/export packages magicpoint contrib Install additional contributed scripts orage clock-panel-plugin Build the clock plugin for the XFCE panel scribus boost Enable support for Boost based enhancement hunspell Enable support for spell checking with app-text/hunspell minimal Don't install headers (only required for e.g. plug-in developers) osg 3D rendering via dev-games/openscenegraph scripts Install the scripts templates Document templates tk Install tk based scripts e.g. FontSample.py skrooge activities Enable kactivities support designer Build plugins for dev-qt/designer webkit Build with dev-qt/qtwebkit instead of dev-qt/qtwebengine texmacs netpbm Add support for media-libs/netpbm texstudio video Use phonon for video embedding app-pda barry boost Enable boost support gui Install the GUI backup tool gtkpod clutter Enable clutter support for displaying coverart app-portage conf-update colordiff Use colors when displaying diffs (app-misc/colordiff) libressl Enable SSL connections and crypto functions using dev-libs/libressl eix debug Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use. doc Create description of the eix cache file additionally in html format sqlite Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix g-sorcery bson Support BSON file format for package DB gemato gpg Install dependencies needed for OpenPGP signature verification support tools Install additional utilities (benchmarks, hash testing tools, fast Manifest generators) to /usr/share/gemato. grs server Install all the tools building systems layman cvs Support dev-vcs/cvs based overlays darcs Support dev-vcs/darcs based overlays g-sorcery Support app-portage/g-sorcery based overlays git Support dev-vcs/git based overlays gpg Support app-crypt/gnupg signed overlays lists and manifests mercurial Support dev-vcs/mercurial based overlays squashfs Support mounting squashfs image overlays locally read-only subversion Support dev-vcs/subversion based overlays sync-plugin-portage Install the sys-apps/portage sync module nattka depgraph-order Process packages in depgraph order whenever possible. pfl network-cron Adds a cron job which does a weekly submit of the package database portage-utils qmanifest Build qmanifest applet, this adds additional dependencies for GPG, OpenSSL and BLAKE2B hashing qtegrity Build qtegrity applet, this adds additional dependencies for OpenSSL tatt templates Install template scripts to be used with tatt app-shells autojump ipython Add support for dev-python/ipython bash bashlogger Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots mem-scramble Build with custom malloc/free overwriting allocated/freed memory net Enable /dev/tcp/host/port redirection plugins Add support for loading builtins at runtime via 'enable' bash-completion eselect Support blacklisting of completions via 'eselect bash-completion'. This enables custom Gentoo patching of upstream completion loader. mksh lksh variant that uses POSIX-compliant arithmetics with the host “long” data type and is automatically in POSIX mode when called as /bin/sh pdsh rsh This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred. shish diet Use dev-libs/dietlibc app-text atril caja Enable property page extension in mate-base/caja dvi Enable build-in DVI viewer epub Enable build-in DVI viewer using net-libs/webkit-gtk synctex Enable search highlighting through synctex (virtual/tex-base) t1lib Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib) xps Enable XPS viewer using app-text/libgxps blogc git Build blogc-git-receiver tool httpd Build blogc-runserver tool make Build blogc-make tool cb2bib webkit Use dev-qt/qtwebkit instead of dev-qt/qtwebengine coolreader wxwidgets Use x11-libs/wxGTK instead of Qt5 crm114 mew Add support for using the mewdecode mime decoder (app-emacs/mew) mimencode Add support for using the mimencode mime (net-mail/metamail) normalizemime Add support for using the normalizemime (mail-filter/normalizemime) dbacl interactive Enable the interactive mailinspect ability dblatex inkscape Use inkscape to convert SVG. Disable to use gnome-base/librsvg instead. dictd judy Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies minimal Don't build server but dict client, dictzip and dictfmt only. docbook-sgml-utils jadetex Add support for processing tex files produced by the TeX backend of Jade docbook-xsl-ns-stylesheets ruby Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby. docbook-xsl-stylesheets ruby Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby. ebook-tools lit2epub Install lit2epub script editorconfig-core-c cli Install command line interface. enchant aspell Adds support for app-text/aspell spell checker hunspell Adds support for app-text/hunspell spell checker evince dvi Enable the built-in DVI viewer nautilus Enable property page extension in gnome-base/nautilus postscript Enable support for PostScript and Adobe Illustrator documents with app-text/libspectre spell Enable inline spell check for annotations via app-text/gspell t1lib Enable the Type-1 fonts for the built-in DVI viewer (media-libs/t1lib) xps Enable XPS viewer using app-text/libgxps foliate handy Use gui-libs/libhandy ghostscript-gpl unicode Add support for unicode passwords via net-dns/libidn groonga abort Enable query abortion benchmark Build benchmark programs dynamic-malloc-change Allow dynamic memory allocation change for testing exact-alloc-count Atomic counting for memory alloc count fmalloc Make memory allocation failed in specified condition for debug futex Use futex libevent Enable dev-libs/libevent used for suggestion mecab Use app-text/mecab for morphological analysis msgpack Enable dev-libs/msgpack used for suggestion nfkc Use nfkc based utf8 normalization sphinx Enable document generation by app-misc/sphinx uyield Build for detecting race conditions zeromq Enable net-libs/zeromq used for suggestion hyperestraier mecab Enable app-text/mecab support for Estraier kbibtex webengine Use dev-qt/qtwebengine for HTML previews zotero Enable support for synchronisation with zotero.org web service lcdf-typetools kpathsea Enable integration with kpathsea search library (TeX related) libebook tools Build file conversion tools libmwaw tools Build file conversion tools libqxp tools Build file conversion tools libstaroffice tools Build conversion tools zlib Enable support for compressed data libwpd tools Build file conversion tools libwps tools Build file conversion tools mathtex png Generate png images by default instead of gif msort heap Use heap instead of alloca() icu Use dev-libs/icu instead of dev-libs/libutf8proc. libuninum Use dev-libs/libuninum for conversion. pandoc embed-data-files Embed data files in binary for relocatable executable. optimize Enable -O1 optimizations (requires ~16GiB memory) trypandoc Build trypandoc cgi executable. pastebinit crypt Install pbputs for gpg-encrypted pastes pdfgrep unac Removing accents and ligatures before search pelican markdown Markdown support podofo boost Add support for boost tools Build and install commandline tools. poppler nss Enable signatures handling with dev-libs/nss utils Install command-line PDF converters and various utilities. qpdf perl Install fix-qdf tool (for reverting PDF edits) written in perl qpdfview fitz Use experimental fitz rendering, provided by app-text/mupdf, instead of poppler synctex Add support for searching TeX sources robodoc examples Installs usage examples in /usr/share for Perl sdcv darkterm Improve readability of color output on terminals with dark background. sigil plugins Installed needed Python packages for using Sigil plugins system-mathjax Use the system-wide dev-libs/mathjax instead of bundled stardict advertisement Enable stardict advertisements plugin cal Enable calendar support using cal program dictdotcn Enable dict.cn network plugin (for Chinese language) espeak Enable text to speech synthesizer plugin using app-accessibility/espeak engine flite Enable text to speech synthesizer plugin using app-accessibility/flite engine fortune Enable plugin to read fortune messages using games-misc/fortune-mod. You may consider installing games-misc/fortune-mod-all to get all fortune messages. gucharmap Enable plugin for unicode symbols description using gnome-extra/gucharmap htmlparse Enable plugin to parse dictionaries with html content info Enable plugin to read info pages man Enable plugin to read manual pages powerwordparse Enable plugin to parse powerword dictionaries pronounce Install WyabdcRealPeopleTTS package (it is just many .wav files) to make StarDict pronounce English words qqwry Enable QQWry plugin, which provides information (in Chinese language) about geographical positions, owner, etc. for IP addresses tools Build and install dictionary management tools and converters from various dictionary formats updateinfo Enable plugin to check for stardict updates wikiparse Enable plugin to parse dictionaries in wikimedia format wordnet Enable wordnet plugin to find similar English words using lexical database xdxfparse Enable plugin to parse dictionaries in xdxf (XML Dictionary eXchange Format) youdaodict Enable youdao.com network plugin (for Chinese language) sword clucene Use dev-cpp/clucene for lucene search support sword-modules esoteric Install modules with no linguistic content, in unknown languages etc. tessdata_best osd Enable support orientation and script detection. tessdata_fast osd Enable support orientation and script detection. tessdata_legacy math Enable support for recognition of equations. osd Enable support orientation and script detection. tesseract math Enable support for recognition of equations. opencl Enable opencl support for speedup using GPU computation. osd Enable support orientation and script detection. scrollview Install viewer to debug recognition (ScrollView). training Install training applications to add support for new languages. texlive context Add support for the ConTeXt format (dev-texlive/texlive-context) epspdf Add support for app-text/epspdf, a tool for converting [e]ps files to pdf extra Add support for extra TeXLive packages games Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games) graphics Add support for several graphics packages (pgf, tikz,...) humanities Add LaTeX support for the humanities (dev-texlive/texlive-humanities) luatex Add extra support for luatex metapost Add support for metapost: A tool for creating graphics in scalable PostScript music Add support for music typesetting (dev-texlive/texlive-music) pdfannotextractor Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files pstricks Add pstricks packages (dev-texlive/texlive-pstricks) publishers Add support for publishers (dev-texlive/texlive-publishers) science Add typesetting support for natural and computer sciences (dev-texlive/texlive-mathscience) tex4ht Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org) texi2html Add support for app-text/texi2html which converts texi files to HTML xetex Add support for XeTeX macros (dev-texlive/texlive-xetex) texlive-core luajittex Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster. xetex Add support for XeTeX: a TeX system with Unicode and modern font technologies. xindy Add support for Xindy: A general-purpose index processor. wdiff experimental Build experimental utilities (mdiff, unify, wdiff2) webgen builder Enable programmatic HTML/XML generation highlight Enable syntax highlighting for certain plugins markdown Markdown support writerperfect abiword Add support for abiword format using app-text/libabw ebook Add support for various ebook formats using app-text/libebook epub Add support for conversion to ePub format using app-text/libepubgen freehand Add support for freehand format using media-libs/libfreehand gsf Add support for structured files using gnome-extra/libgsf keynote Add support for keynote format using app-text/libetonyek mspub Add support to mspub format using app-text/libmspub mwaw Add support to mwaw formats using app-text/libmwaw pagemaker Add support to pagemaker formats using media-libs/libpagemaker qxp Add support for QuarkXpress documents using app-text/libqxp visio Add support for visio format using media-libs/libvisio wpd Add support for wpd format using app-text/libwpd wpg Add support for wpg format using app-text/libwpg wps Add support for wps format using app-text/libwps zmf Add support for Zoner Callisto/Draw documents format using media-libs/libzmf wv tools Install optional utilities considered deprecated in favor of using AbiWord. xmlto text Support conversion from XML to plain text xpdf cmyk Include support for CMYK rasterization i18n Enable support non-UTF8 national charsets icons Generate desktop PNG icons using media-gfx/inkscape libpaper Use app-text/libpaper to get paper preferences metric Use A4 instead of US Letter paper size by default for PostScript output. This option has effect only if libpaper USE flag is disabled opi Include support for OPI (Open Prepress Interface) comments textselect Allow text selection utils Install command-line PDF converters and various utilities zathura synctex Use libsynctex to get latex codeline from pdf zathura-meta cb Install plug-in for ComicBook support app-vim gentoo-syntax ignore-glep31 Remove GLEP 31 (UTF-8 file encodings) settings app-xemacs xemacs-packages-all mule Add multi-language support to XEmacs dev-ada gnat_util shared Build gnat_util shared library static-pic Build gnat_util static library with pic code gnatcoll-bindings shared Build shared library static-pic Build shared library gnatcoll-core shared Build shared library static-pic Build static library with pic code gnatcoll-db db2ada Build gnatcoll_db2ada gnatinspect Build gnatinspect shared Build shared library sql Build sql library static-pic Build shared library xref Build xref library gtkada shared Build gtkada as shared library libadalang shared Build shared library libgpr shared Build shared library static-pic Build static library with pic code xmlada shared Build shared library static-pic Build static library with pic code dev-cpp eigen c++11 Build using the C++11 standard cuda Build with cuda support glog gflags Use dev-cpp/gflags for flag parsing unwind Use sys-libs/libunwind for stack unwinding instead of glibc/gcc (may be more reliable on x86_64) libcmis man Build and install man pages tools Build client tool for testing and viewing features libjson-rpc-cpp http-client Build support for HTTP client using net-misc/curl http-server Build support for HTTP server using net-libs/libmicrohttpd redis-client Build support for Redis client using dev-libs/hiredis redis-server Build support for Redis server using dev-libs/hiredis stubgen Build header stub code generator (needed for development and when pregenerated headers are not bundled) sourcetrail examples Install example projects. dev-db aerospike-server-community tools Install extra tools etcd server Installs etcd daemon firebird server Install the server components of Firebird, not just the client xinetd Install ClassicServer influxdb man Build and install man pages mariadb backup Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption client-libs Build the client libraries from the server package instead of the C Connector packages columnstore Build the ColumnStore storage engine extraengine Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition) galera Enables galera replication innodb-lz4 Enables lz4 compression methods for InnoDB/XtraDB innodb-lzo Enables lzo compression methods for InnoDB/XtraDB innodb-snappy Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy jdbc Enable the CONNECT engine to access foreign databases via JDBC latin1 Use LATIN1 encoding instead of UTF8 libressl Enable SSL connections and crypto functions using dev-libs/libressl mroonga Add support for the Mroonga engine for interfacing with the Groonga text search numa Enable NUMA support using sys-process/numactl (NUMA kernel support is also required) oqgraph Add support for the Open Query GRAPH engine pam Enable the optional PAM authentication plugin for the server profiling Add support for statement profiling (requires USE=community). rocksdb Add support for RocksDB; a key/value, LSM database optimized for flash storage s3 Build the S3 storage engine server Build the server program sphinx Add suport for the sphinx full-text search engine sst-mariabackup Add tools needed to support the mariabackup SST method sst-rsync Add tools needed to support the rsync SST method sst-xtrabackup Add tools needed to support the xtrabackup and xtrabackup-v2 SST methods systemtap Build support for profiling and tracing using dev-util/systemtap test Install upstream testsuites for end use. tokudb Add support for TokuDB storage engine yassl Enable SSL connections and crypto functions using the bundled yaSSL mongodb lto Adds support for link time optimization mms-agent Install the MongoDB Monitoring Service agent tools Install the MongoDB tools (mongoimport, mongodump...) from app-admin/mongo-tools mycli ssh Add support for connection over SSH tunnel mysql cjk Add CJK support for InnoDB fulltext search using app-text/mecab client-libs Build the client libraries from the server package instead of the C Connector packages (not recommended) experimental Build experimental features aka "rapid" plugins latin1 Use LATIN1 encoding instead of UTF8 libressl Enable SSL connections and crypto functions using dev-libs/libressl numa Enable NUMA support using sys-process/numactl (NUMA kernel support is also required) profiling Add support for statement profiling (requires USE=community). router Build the MySQL router program server Build the server program systemtap Build support for profiling and tracing using dev-util/systemtap test Install upstream testsuites for end use. yassl Enable SSL connections and crypto functions using the bundled yaSSL mysql-cluster client-libs Build the client libraries from the server package instead of the C Connector packages (not recommended) extraengine Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition) latin1 Use LATIN1 encoding instead of UTF8 libressl Enable SSL connections and crypto functions using dev-libs/libressl numa Enable NUMA support using sys-process/numactl (NUMA kernel support is also required) profiling Add support for statement profiling (requires USE=community). server Build the server program systemtap Build support for profiling and tracing using dev-util/systemtap test Install upstream testsuites for end use. yassl Enable SSL connections and crypto functions using the bundled yaSSL mysql-connector-c++ gcov Build coverage support legacy Build the legacy 1.x API as well as the DevX API opendbx man Build and install man pages oracle-instantclient jdbc Support for XA, Internationalization, and RowSet operations under JDBC odbc Libraries for enabling ODBC applications precomp "proc" binary and related files to precompile a Pro*C application sdk Header files and an example makefile for developing Oracle applications sqlplus The SQL*Plus command line tool for SQL and PL/SQL queries tools Data Pump, SQL*Loader and Workload Replay Client percona-server cjk Add CJK support for InnoDB fulltext search using app-text/mecab client-libs Build the libmysqlclient libraries experimental Build experimental features aka "rapid" plugins latin1 Use LATIN1 encoding instead of UTF8 libressl Enable SSL connections and crypto functions using dev-libs/libressl numa Enable NUMA support using sys-process/numactl (NUMA kernel support is also required) profiling Add support for statement profiling (requires USE=community). rocksdb Add support for RocksDB; a key/value, LSM database optimized for flash storage router Build the MySQL router program server Build the server program systemtap Build support for profiling and tracing using dev-util/systemtap tokudb Add support for TokuDB storage engine tokudb-backup-plugin Builds the TokuDB backup plugin yassl Enable SSL connections and crypto functions using the bundled yaSSL pgbouncer c-ares Use c-ares as the DNS backend instead of evdns (libevent). udns Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only. pgpool2 memcached Use memcached for query caching. pgrouting html Install HTML formatted documentation phpmyadmin setup Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past. postgis address-standardizer Normalize US and CA postal addresses gtk Build graphical interface for shp2pgsql (shp2pgsql-gui) mapbox Add capability to transform geometry into Mapbox Vector Tile topology Build topology spatial types and functions postgresql llvm Add support for llvm JIT engine pg-legacytimestamp Use double precision floating-point numbers instead of 64-bit integers for timestamp storage. server Disable to build and install the clients and libraries only. uuid Enable server side UUID generation (via dev-libs/ossp-uuid). psqlodbc iodbc Use dev-db/libiodbc. Disable to use dev-db/unixODBC. redis tcmalloc Use tcmalloc from dev-util/google-perftools for allocations. spatialite geos Add the sci-libs/geos library for exact topological tests proj Add the sci-libs/proj library for reprojection features xls Add the dev-libs/freexl library for xls import support sqldeveloper sybase Add support for the Sybase SQL Database Server sqlite secure-delete Enable overwriting of deleted content with zeros by default (http://sqlite.org/pragma.html#pragma_secure_delete), causing some performance penalty tools Install additional tools sqlitestudio cli Build CLI interface unixODBC minimal Disable bundled drivers and extra libraries (most users don't need these) odbcmanual Administrator, Internal Structure, Programmer and User documentation dev-embedded avrdude ftdi Enable support for USB FTDI chips via dev-embedded/libftdi libftdi tools build ftdi_eeprom helper tool openocd cmsis-dap Support for CMSIS-DAP compliant adapters dummy Build the dummy port driver ftdi Enable support for USB FTDI chips via dev-embedded/libftdi jlink Build the SEGGER J-Link driver parport Enable support for parport JTAG devices verbose-io Verbose IO and comm JTAG and USB messages sdcc avr Add support for AVR -- not supported upstream boehm-gc Enable Hans Boehm's garbage collector dev-libs/boehm-gc device-lib Enable built of devices libraries ds390 Add support for Dallas DS390 ds400 Add support for Dallas DS400 ez80-z80 Add support for EZ80-Z80 gbz80 Add support for Gameboy gbz80 hc08 Add support for Freescale/Motorola HC08 based mcs51 Add support for Intel mcs51 non-free Enable non-free runtime library parts packihx Enable Intel HEX files pack utility pdk13 Add support for PDK13 pdk14 Add support for PDK14 pdk15 Add support for PDK15 pdk16 Add support for PDK16 pic14 Add support for Microchip 14 bits PICs pic16 Add support for Microchip 16 bits PICs r2k Add support for Rabbit 2000 r3ka Add support for Rabbit 3000A s08 Add support for Freescale/Motorola S08 sdbinutils Enable SDCC library archive utilities sdar, sdranlib, sdnm sdcdb Enable SDCC source level debugger sdcpp Enable SDCC preprocessor based on GCC cpp stm8 Add support for STMicroelectronics STM8 tlcs90 Add support for TLCS-90 ucsim Enable software simulator for microcontrollers z180 Add support for Zilog Z180 z80 Add support for Zilog Z80 urjtag ftd2xx Enable support for USB FTDI chips via dev-embedded/libftd2xx ftdi Enable support for USB FTDI chips via dev-embedded/libftdi dev-games aseprite bundled-libs Use the upstream provided bundled version of allegro 4.4.2 gtk3 Enable support for the experimental native GTK File Dialog cegui devil Build the DevIL based ImageCodec module freeimage Build the FreeImage based ImageCodec module irrlicht Enable the Irrlicht renderer ogre Enable the OGRE renderer tinyxml Enable the Tiny XML parser module xerces-c Enable the Xerces-C++ XML parser module zip Enable the Minizip resource provider guichan allegro Build the Allegro frontend mygui l10n_ru Install some additional russian docs if 'doc' useflag enabled ogre Use the ogre render subsystem. (cannot combine with opengl) opengl Use the opengl render subsystem. (cannot combine with ogre) plugins Build MyGUI plugins samples Install MyGUI demos (needs ogre USE flag) tools Build the tools for development ode double-precision more precise calculations at the expense of speed gyroscopic enable gyroscopic term (may cause instability) ogre assimp Use media-libs/assimp to import assets from 3D files boost Enable boost support cache Enable GL state cache support cg NVIDIA toolkit plugin deprecated Build deprecated component 'HLMS' and nodeless positioning of Lights and Cameras. double-precision More precise calculations at the expense of speed egl Use egl instead of glx fine-granularity Enable fine light mask granularity. This impacts on performance and should not be enabled unless an application really needs it. freeimage Support images via media-libs/freeimage gl3plus Build OpenGL 3+ RenderSystem (EXPERIMENTAL) gles2 Build OpenGL ES 2.x RenderSystem gles3 Enable OpenGL ES 3.x Features json Use dev-libs/rapidjson (needed by Hlms JSON materials) legacy-animations Use the skeletal animation from 1.x. It's much slower, but the new system is still experimental. ois Pull in Object-oriented Input System library dev-games/ois for samples poco When USE=threads, use poco for threading resman-pedantic Resource Manager PEDANTIC : require an explicit resource group. Case sensitive lookup. Some demos might not work with this setting. (default: case-insensitive + sensitive lookup in all groups) tbb When USE=threads, use tbb for threading tools Build and install AssimpConverter (assimp USE flag is enabled), MeshUpgrader, VRMLConverter and XMLConverter openscenegraph asio Enable support for dev-cpp/asio library dicom Enable DICOM medical image file support via sci-libs/dcmtk egl Enable EGL support fox Build examples using x11-libs/fox library gdal Enable support for sci-libs/gdal library las Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas openinventor Build OpenInventor plugin osgapps Build osg applications sdl2 Use media-libs/libsdl2 additionally to media-libs/libsdl xrandr Enable support for the X xrandr extension openscenegraph-openmw egl Enable EGL support fox Build examples using x11-libs/fox library gdal Enable support for sci-libs/gdal library openinventor Build OpenInventor plugin osgapps Build osg applications sdl2 Use media-libs/libsdl2 additionally to media-libs/libsdl xrandr Enable support for the X xrandr extension physfs 7zip Enable 7zip/lzma archive support grp Enable Build Engine GRP archive support hog Enable Descent I/II HOG archive support iso Enable ISO9660 file support mvl Enable Descent I/II MVL archive support qpak Enable Quake I/II QPAK archive support slb Enable Independence War SLB archive support vdf Enable Gothic/Gothic II VDF archive support wad Enable Doom WAD archive support simgear dns Enable DNS resolver via net-libs/udns gdal Enable alternative terrain engine based on pagedLOD via sci-libs/gdal subversion Enable terrasync scenery downloader dev-haskell abstract-deque usecas Enable the reference implementation to use hardware compare-and-swap. aeson cffi Controls whether to include c-ffi bits or pure haskell. Default to False for security. fast compile without optimizations aeson-pretty lib-only don't build 'aeson-pretty' executable. ansi-terminal example Build the example application. ansi-wl-pprint example Build the example application. attoparsec-iso8601 developer operate in developer mode fast compile without optimizations authenticate network-uri Get Network.URI from the network-uri package aws network-3 Use network-3 bifunctors semigroups You can disable the use of the `semigroups` package using `-f-semigroups`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. tagged You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. biosff fclip Build the 'fclip' executable. flower Build the 'flower' executable. frecover Build the 'frecover' executable. bytedump executable build executable file bytes test-doctests Enable the doctest suite when using the enable-tests option for cabal. c2hs regression run regression tests cabal-install native-dns Enable use of the resolv and windns packages for performing DNS lookups chaselev-deque debug Enable the extra internal checks. chell color-output use colors in program output chimera representable Define Representable instance from adjunctions package cmark system-cmark use app-text/cmark instead of bundled copy cmdargs quotation Build quote module testprog Build the test program comonad containers You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. distributive You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive` test-doctests Run the doctests test suite contravariant semigroups You can disable the use of the `semigroups` package using `-f-semigroups`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. statevar You can disable the use of the `StateVar` package using `-f-StateVar`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. tagged You can disable the use of the `tagged` package on older versons of GHC using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. cpu executable build 'cpuid' tool criterion embed-data-files Embed the data files in the binary for a relocatable executable crypto-api all-cpolys Build all the CMAC polynomes up to 10000 bits instead of just the usual ones cryptonite integer-gmp Whether or not to use GMP for some functions encoding systemencoding Provide the getSystemEncoding action to query the locale. entropy halvm Build for the HaLVM. filestore maxcount Make use of a recent (>= 2.3.0) Darcs feature which vastly improves the performance of 'latest'. You should disable this flag if you plan to use gitit with an older version of Darcs, or 'latest' will raise an error. foundation experimental enable building experimental features, known as highly unstable or without good support cross-platform glib closure-signals Use the the GClosure-based signals implementation. gtk deprecated Include definitions in this library that are considered obsolete. fmode-binary Set the default file translation mode for file I/O operations to _O_BINARY. gio Depend on GIO package, thereby enabling certain features. gtk2hs-buildtools closuresignals Use the the GClosure-based signals implementation. gtk3 fmode-binary Set the default file translation mode for file I/O operations to _O_BINARY. gio Depend on GIO package, thereby enabling certain features. hackage-security network-uri Get Network.URI from the network-uri package. hakyll buildwebsite Build the hakyll website checkexternal Include external link checking previewserver Include the preview server usepandoc Include Pandoc support watchserver wait for filesystem changes and rebuild pages happstack-server network-uri Get Network.URI from the network-uri package template-haskell Description: Template Haskell is available on this system hashtables bounds-checking if on, use bounds-checking array accesses detailed-profiling add detailed profiling information to profiled build-depends portable if on, use only pure Haskell code and no GHC extensions. unsafe-tricks turn on unsafe GHC tricks haskeline legacy-encoding Use legacy iconv encoding for POSIX. This is only intended for testing. libiconv Explicitly link against the libiconv library. terminfo Use the terminfo package for POSIX consoles. hdbc-sqlite3 splitbase Choose the new smaller, split-up package. hexpat bundled-expat Use bundled expat instead of dev-libs/expat highlighting-kate executable Build the Highlight executable. pcre-light Use the pcre-light library instead of regex-pcre-builtin. hlint gpl Use GPL libraries, specifically hscolour. hps build-exec Build the `hps-fractals' executable hs3 network-uri Get Network.URI from the network-uri package hslogger network-3 Use network-3 hsopenssl fast-bignum Enable fast moving of bignums between OpenSSL and GMP (GHC Only) http conduit10 Use version 1.0.x or below of the conduit package (for the test suite). network-uri Get Network.URI from the network-uri package. http-client network-uri Get Network.URI from the network-uri package. http-streams network-uri Get Network.URI from the network-uri package. httpd-shed buildexamples Build example executables. network-bsd Get Network.BSD from the network-bsd package. network-uri Get Network.URI from the network-uri package. icalendar network-uri use network-uri package io-streams network Include network support zlib Include zlib support json mapdict Encode Haskell maps as JSON dicts parsec Add support for parsing with Parsec pretty Add support for using pretty printing combinators language-dot executable Build the `ppdot' executable lens benchmark-uniplate Enable benchmarking against Neil Mitchell's uniplate library for comparative performance analysis. Defaults to being turned off to avoid the extra dependency. dump-splices Build and run the doctests test-suite. inlining Generate inline pragmas when using template-haskell. This defaults to enabled, but you can to shut it off to benchmark the relative performance impact, or as last ditch effort to address compile errors resulting from the myriad versions of template-haskell that all purport to be 2.8. j Attempt a parallel build with GHC 7.8. old-inline-pragmas Some 7.6.1-rc1 users report their TH still uses old style inline pragmas. This lets them turn on inlining. safe Disallow unsafeCoerce test-doctests Build and run the doctests test-suite. test-templates Build the test templates if we're building tests trustworthy Assert that we are trustworthy when we can libyaml no-unicode Don't enable unicode output. Instead, unicode characters will be escaped. system-libyaml Use the system-wide libyaml instead of the bundled copy linear template-haskell You can disable the use of the `template-haskell` package using `-f-template-haskell`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. lukko ofd-locking Enable open file descriptor locking. Available on Linux (kernel 3.15, released Jun 8, 2014). missingh network-3 Use network-3 mod semirings Derive semiring instances monad-control instancest If enabled this package will export MonadBaseControl instances for the lazy and strict ST monad. If disabled these instances are only exported when base >= 4.4. If enabled it is required that the transformer-base package exports MonadBase instances for ST. It will do this by default. monad-logger template-haskell Enable Template Haskell support. monad-par chaselev Use Chase-Lev Deques for higher-perf work-stealing. nats binary enable binary instances hashable enable hashable instances template-haskell enable template_haskell netlink generators build the generator scripts for constants network-data small-base Build the split-up base package. optparse-simple build-example Build the example executable pandoc-citeproc bibutils Use Chris Putnam's Bibutils. debug Turn on debug tracing. embed-data-files Embed locale files into the library (needed for windows packaging) static Use static linking. unicode-collation Use Haskell bindings to the International Components for Unicode (ICU) libraries parsec-numbers parsec1 use dev-haskell/parsec1 instead of dev-haskell/parsec parsers attoparsec Enable the use of the `attoparsec` package parsec Enable the use of the `parsec` package persistent nooverlap Use OverlappingInstances only for String. Only developers should use this. persistent-sqlite build-sanity-exe Build a sanity check test executable. pointed comonad optional instances containers optional instances kan-extensions optional instances semigroupoids optional instances semigroups optional instances stm optional instances tagged optional instances transformers optional instances unordered-containers optional instances publicsuffixlist create export Network.PublicSuffixList.Create module runtimelist read suffix list from dist at startup instead of embedding list into library quickcheck template-haskell Enable additional test modules requiring Template Haskell support. quickcheck-classes aeson Enable the use of the `aeson` package. This may be useful for accelerating builds in sandboxes for expert users. binary-laws Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration. semigroupoids Enable the use of the `semigroupoids` package. This may be useful for accelerating builds in sandboxes for expert users. semirings Enable the use of the `semirings` package. This may be useful for accelerating builds in sandboxes for expert users. unary-laws Include infrastructure for testing class laws of unary type constructors. vector Enable the use of the `vector` package. This may be useful for accelerating builds in sandboxes for expert users. quickcheck-classes-base binary-laws Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration. unary-laws Include infrastructure for testing class laws of unary type constructors. recaptcha network-uri Get Network.URI from the network-uri package. reflection template-haskell Enable template haskell. rfc5051 mkunicodedata build codes generator itself sandi conduit Build with conduit semigroupoid-extras profunctors You can disable the use of the `profunctors` package using `-f-profunctors`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. semigroupoids comonad You can disable the use of the `comonad` package using `-f-comonad`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Comonad` containers You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. contravariant You can disable the use of the `contravariant` package using `-f-contravariant`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant` distributive You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive` tagged You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. unordered-containers Enable the use of the `unordered-containers` package (and also its dependency `hashable`). Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. semigroups binary provide instances for binary package bytestring You can disable the use of the `bytestring` package using USE=-bytestring. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. containers You can disable the use of the `containers` package using USE=-containers. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. deepseq You can disable the use of the `deepseq` package using `-f-deepseq`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. hashable You can disable the use of the `hashable` package using USE=-hashable. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If set we will not supply an instance of `Hashable`. text You can disable the use of the `text` package using USE=-text. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. transformers provide instances for transformers package. unordered-containers You can disable the use of the `unordered-containers` package using USE=-unordered-containers. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. semirings containers Enable the use of the `containers` package. Disabling this may be useful for accelerating builds in sandboxes for expert users. hashable Enisable the use of the `hashable` package. Disabling this may be useful for accelerating builds in sandboxes for expert users. Note: `-hashable` implies `-unordered-containers`, as we are necessarily not able to supply those instances as well. unordered-containers Enable the use of the `unordered-containers` package. Disabling this may be useful for accelerating builds in sandboxes for expert users. sendfile portable Explicitly enable portable sendfile support (implemented in Haskell) sha exe Build a sha1 and a sha384 executable similar to 'md5sum'. shakespeare test-coffee Render tests through coffeescript render function. test-export Test export. test-roy Render tests through roy render function. shelly lifted run the tests against Shelly.Lifted shuffle network-uri Get Network.URI from the network-uri package. simple-sendfile allow-bsd Allow use of BSD sendfile (disable on GNU/kFreeBSD) skein big-endian When manually selecting the endianness, use big-endian (default is little-endian) force-endianness Use a manually selected endian when compiling (see flag 'big-endian') reference Use the reference implementation instead of the optimized one skylighting executable Build the skylighting executable. skylighting-core executable Build the skylighting executable. snap-core portable No non-haskell unportable code. snap-server build-pong Build a server that just returns "PONG" openssl enable https support using dev-haskell/hsopenssl portable no non-haskell unportable code. splitmix optimised-mixer Use JavaScript for mix32 random Providen RandomGen SMGen instance stack developer-mode By default, should extra developer information be output? store-core force-alignment No description texmath executable Compile test executable. network-uri Get Network.URI from the network-uri package. text developer operate in developer mode text-short asserts Enable runtime-checks via 'assert' thyme bug-for-bug bug-for-bug compatibility with time lens use the full lens package show-internal instance Show of internal representation tls compat Accept SSLv2 compatible handshake. network Use the base network library. transformers-base orphaninstances Build instances for orphan datatypes. unix-compat old-time build against old-time package uuagc with-loag Use dev-haskell/minisat external SAT-solver to schedule all Linear Ordered AGs. vector boundschecks Enable bounds checking internalchecks Enable internal consistency checks at the cost of a significant performance penalty unsafechecks Enable bounds checking in unsafe operations at the cost of a significant performance penalty vector-algorithms bench Build a benchmarking program. boundschecks Enable bounds checking. internalchecks Enable internal consistency checks at the cost of a significant performance penalty. properties Enable quickcheck tests. unsafechecks Enable bounds checking in unsafe operations at the cost of a significant performance penalty. vector-instances hashable use dev-haskell/hashable void safe dissable effective but unsafe coersions wai-app-static print print debug info. warp allow-sendfilefd Allow use of sendfileFd (not available on GNU/kFreeBSD). warp-debug Add additional debuging information wcwidth cli Enable command line tool wreq aws Enable AWS tests httpbin Install client yaml no-examples don't build the examples no-exe don't install the yaml2json executable yesod-auth network-uri Get Network.URI from the network-uri package yesod-form network-uri Get Network.URI from the network-uri package zip-archive executable Build the Zip executable. zlib bundled-c-zlib Use the bundled zlib C sources. Requires pkg-config to be False. For windows, this is the default. non-blocking-ffi The (de)compression calls can sometimes take a long time, which prevents other Haskell threads running. Enabling this flag avoids this unfairness, but with greater overall cost. dev-java ant antlr Enable ANTLR Ant tasks bcel Enable bcel (bytecode manipulation) Ant tasks bsf Enable support for Apache Bean Scripting Framework (dev-java/bsf) commonslogging Enable commons-logging Ant tasks commonsnet Enable commons-net Ant tasks jai Enable JAI (Java Imaging) Ant task javamail Enable JavaMail Ant task jdepend Enable Jdepend Ant tasks jmf Enable JMF (Java Media Framework) Ant tasks jsch Disable Jsch (ssh, scp and related) Ant tasks junit Enable JUnit Ant tasks junit4 Enable JUnit4 Ant tasks junitlauncher Enable JUnit5 Ant tasks log4j Enable Apache log4j Ant tasks oro Enable Apache Oro Ant tasks regexp Enable Apache Regexp Ant tasks resolver Enable Apache Resolver Ant tasks swing Enable Swing Ant tasks testutil Enable optional test util classes xz Enable XZ Ant tasks commons-collections test-framework Install the test framework commons-logging avalon-framework Add optional support for avalon-framework avalon-logkit Add optional support for avalon-logkit log4j Add optional support for log4j servletapi Add optional support for servletapi ecj-gcj native Build a native binary along with the jar. Provides faster execution time, but needs about 1G memory and some patience to compile. eclipse-ecj ant Support using ecj in Ant builds via dev-java/ant-eclipse-ecj emma launcher Install /usr/bin/emma. Collides with sci-biology/emboss. gcj-jdk awt Install AWT libraries, needed by some GUIs (not needed to build icedtea) gnu-classpath alsa Build with ALSA javax.sound.midi provider dssi Build with DSSI javax.sound.midi provider gconf Build with GConf preferences backend gjdoc Build GJDoc, a documentation generator gmp Build with GMP backend for java.math.BigInteger gtk Build with Gtk+ AWT peers xml Build with native XML backend icedtea cacao Use the CACAO virtual machine rather than HotSpot. cups Link against the CUPS library at compile time, rather than using it dynamically at runtime. headless-awt Don't install the X backend for AWT, needed by some GUIs (used to be X flag) jamvm Use the JamVM virtual machine rather than HotSpot. jbootstrap If possible, recompile the final IcedTea executables with itself. kerberos Link against Kerberos in order to obtain the cache location. pax_kernel Apply patch needed for pax enabled kernels. pch Build using pre-compiled headers. sctp Build the SCTP NIO channel implementation against lksctp shenandoah Include the Shenandoah ultra-low pause time garbage collector (-XX:+UseShenandoahGC) (arm64 and x86_64 only) smartcard Build the PCSC driver against pcsc-lite system-lcms Build against the system LCMS installation rather than the in-tree copy. zero Enable Zero assembler port (usually for non-HotSpot architectures) icedtea-bin headless-awt Don't install the X backend for AWT, needed by some GUIs (used to be X flag) icedtea-web javascript Enable support for using proxy auto config (PAC) files. nsplugin Enable the browser plugin (NPPlugin). tagsoup Depend on dev-java/tagsoup which allows parsing malformed .jnlp files jdbc-mysql c3p0 Enable c3p0 support log4j Enable log4 support jfreesvg debug Enable debugging during compilation. jna awt Enables support for Java AWT nio-buffers Enables support for NIO buffers log4j javamail Build the SMTPAppender jms Build the JMSAppender lucene contrib Include extra functionality from contrib/ miglayout swt Add support for the SWT toolkit. openjdk gentoo-vm Allow this JDK to be recognised by Gentoo (package manager, eselect, java-config, EXPERIMENTAL!) headless-awt Don't install the X backend for AWT, needed by some GUIs javafx Import OpenJFX modules at build time, via dev-java/openjfx jbootstrap Build OpenJDK twice, the second time using the result of the first source Install JVM sources systemtap Enable SystemTAP/DTrace tracing openjdk-bin gentoo-vm Allow this JDK to be recognised by Gentoo (package manager, eselect, java-config, EXPERIMENTAL!) headless-awt Don't install the X backend for AWT, needed by some GUIs (used to be X flag) source Install JVM sources openjdk-jre-bin gentoo-vm Allow this JDK to be recognised by Gentoo (package manager, eselect, java-config, EXPERIMENTAL!) headless-awt Don't install the X backend for AWT, needed by some GUIs (used to be X flag) openjfx media Compile media module, based on gstreamer-minimal (does not pull gstreamer) source Install JavaFX sources rxtx lfd Installs and uses LockFileServer daemon (lfd) sbt binary Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build. dev-lang bas lr0 Use the LR0 parser instead of the recursive descending parser crystal blocking-stdio-hack Keep STDIO file descriptors in blocking mode. debug Build each module as a separate object file. Speeds build up. xml Use the dev-libs/libxml2 library to enable Crystal xml module yaml Use the dev-libs/libyaml library to enable Crystal yaml module erlang hipe HIgh Performance Erlang extension kpoll Enable kernel polling support fpc ide Build and install the Free Pascal Compiler IDE gdl eigen Build matrix manipulation with dev-cpp/eigen glpk Use GNU Linear Programming Kit sci-mathematics/glpk gshhs Add support for projection adn continent maps with sci-geosciences/gshhs-data hdf Add support for the Hierarchical Data Format v.4 proj Add support for sci-libs/proj (geographic projections) udunits Add support for manipulating units of physical quantities gforth check Enable build-time sanity check. ghc binary Install the binary version directly, rather than using it to build the source version. elfutils Enable DWARF-based backtraces using dev-libs/elfutils. ghcbootstrap Internal: Bootstrap GHC from an existing GHC installation. ghcmakebinary Internal: Build binary friendly for redistribution. gmp Use dev-libs/gmp for integer operations (works faster, but an external depend). numa Enable NUMA thread balancing policy using sys-process/numactl. gnat-gpl ada Build the ADA language (GNAT) frontend awt Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+ bootstrap Used to bootstrap gnat-gpl cilk Support the Cilk Plus language (C/C++ based languages for parallel programming) fixed-point Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!) gcj Build the GCJ Java language frontend. go Build the GCC Go language frontend. graphite Add support for the framework for loop optimizations based on a polyhedral intermediate representation libssp Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES) mpx Enable support for Intel Memory Protection Extensions (MPX) nopie Disable PIE support (NOT FOR GENERAL USE) nossp Disable SSP support (NOT FOR GENERAL USE) nptl Enable support for Native POSIX Threads Library, the new threading module (requires linux-2.6 or better usually) objc Build support for the Objective C code language objc++ Build support for the Objective C++ language objc-gc Build support for the Objective C code language Garbage Collector pgo Build GCC using Profile Guided Optimization (PGO) sanitize Build support for various sanitizer functions (ASAN/TSAN/etc...) ssp Build packages with stack smashing protector on by default systemtap enable systemtap static probe points vtv Build support for virtual table verification (a C++ hardening feature) icon iplsrc install the icon programming library source janet static-libs install janet static library archive, you must enable this flag for using `jpm build` jsonnet custom-optimization Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported) julia system-llvm (Try to) Use the system LLVM install. YMMV. lazarus minimal Don't build extra packages from the bigide component logtalk fop Support for generating pdf documentation using fop xslt Support for generating html documentation using xslt lua deprecated make deprecated data structures/routines available test-complete Run the complete (non-portable) testsuite luajit lua52compat Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code. mercury erlang Support Mercury Erlang grade trail Support Mercury trail grades mercury-extras tommath Enable support for tommath library mlton binary install a binary version bootstrap-smlnj Boostrap mlton with dev-lang/smlnj (takes a long time) pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel stage3 After bootstrap building mlton with dev-lang/smlnj, rebuild mlton with the second stage build of mlton (recommended). moarvm asan Enable clang's Address Sanitizer functionality. Expect longer compile time. clang Use clang compiler instead of GCC jit Enable Just-In-Time-Compiler. Has no effect except on AMD64 and Darwin. optimize Enable optimization via CFLAGS ubsan Enable clang's Undefined Behavior Sanitizer functionality. Expect longer compile time. mono pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel xen Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems. nqp clang Toggle usage of the clang compiler in conjunction with MoarVM moar Build the MoarVM backend (experimental/broken) ocaml flambda Enables the Flambda optimizer: A new intermediate representation (introduced in ocaml 4.03) in the depths of the compiler designed to allow for better inlining. spacetime Enables the Spacetime memory profiler. See https://caml.inria.fr/pub/docs/manual-ocaml/spacetime.html for more information. orc pax_kernel Apply patch needed for pax enabled kernels. perl ithreads Enable Perl threads, has some compatibility problems php argon2 Enable password hashing algorithm from app-crypt/argon2 bcmath Add support for libbcmath cli Enable CLI SAPI coverage Include gcov symbols for test coverage and lcov reports. Only useful for extension developers, and requires GCC. ctype Enable ctype functions embed Enable embed SAPI enchant Add supports Enchant spelling library. ffi Add foreign function interface (ffi extension) support fileinfo Add fileinfo extension support filter Add filter extension support flatfile Add dbm support for flat files fpm Enable the FastCGI Process Manager SAPI gd Adds support for gd (bundled with PHP) hash Enable the hash extension inifile Add dbm support for .ini files intl Enables the intl extension for extended internalization support json Enable JSON support ldap-sasl Add SASL support for the PHP LDAP extension lmdb Enable support for dev-db/lmdb db backend opcache Enables built-in opcode cache, replacing pecl-apc et al. pcntl Add support for process creation functions pdo Enable the bundled PDO extensions phar Enables the phar extension to provide phar archive support phpdbg Enable the PHP Debug Command Line SAPI (like gdb for php) session-mm Include dev-libs/mm support for session storage sharedmem Add support for shared memory use simplexml Support for SimpleXML sodium Enable support for crypto through dev-libs/libsodium sysvipc Support for System V-compatible inter-process communication tokenizer Add support for the PHP file parser tokyocabinet Enable support for dev-db/tokyocabinet db backend wddx Add support for Web Distributed Data eXchange webp Enable webp support for GD in php-7.x xmlreader Enable XMLReader support xmlwriter Enable XMLWriter support xslt Enable the XSL extension zip-encryption Enable ZIP file encryption from dev-libs/libzip polyml portable Build the portable interpreter version of Poly/ML instead of native python bluetooth Build Bluetooth protocol support in socket module threads Enable threading support. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING) wide-unicode Enable wide Unicode implementation which uses 4-byte Unicode characters. Switching of this USE flag changes ABI of Python and requires reinstallation of many Python modules. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING) wininst Install Windows executables required to create an executable installer for MS Windows. qu-prolog pedro Pedro subscription/notification communications system rakudo clang Use Clang to compile the MoarVM backend moar Use the MoarVM as backend ruby rdoc Install dev-ruby/rdoc after installing Ruby. rubytests Install ruby tests that can only be run after ruby is installed systemtap Enable SystemTAP/DTrace tracing rust clippy Install clippy, Rust code linter miri Install miri, an interpreter for Rust's mid-level intermediate representation (requires USE=nightly) nightly Enable nightly (UNSTABLE) features parallel-compiler Build a multi-threaded rustc rls Install rls, Rust Language Server (used with IDEs supporting RLS protocol) rustfmt Install rustfmt, Rust code formatter system-bootstrap Bootstrap using installed rust compiler system-llvm Use the system LLVM install wasm Build support for the wasm32-unknown-unknown target rust-bin clippy Install clippy, Rust code linter rls Install rls, Rust Language Server (used with IDEs supporting RLS protocol) rustfmt Install rustfmt, Rust code formatter scala binary Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build. smlnj pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel spidermonkey custom-optimization Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported) debug Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems lto Enable Link Time Optimization (LTO) system-icu Use the system-wide dev-libs/icu instead of bundled -- note, only takes effect when icu flag is enabled swi-prolog archive Use libarchive for extension packs uuid Use ossp-uuid for UUID pack yaml Use libyaml for YAML pack swig ccache build ccache-swig(a fast compiler cache) vala valadoc Installs valadoc documentation generation tool yap R Enable support for connecting R to Prolog raptor Enable support for Raptor RDF syntax libarary zig experimental Enable builds that do not support all of LLVM's target architectures dev-libs antlr-c debugger Compiles debug info into the library appstream apt Enables Debians APT support appstream-glib fonts Enable fonts support for appstream-builder. stemmer Add word stemming via dev-libs/snowball-stemmer. apr older-kernels-compatibility Enable binary compatibility with older kernels urandom Use /dev/urandom instead of /dev/random apr-util libressl Use dev-libs/libressl instead of dev-libs/openssl for 'openssl' USE flag nss Install apr_crypto_nss module openssl Install apr_crypto_openssl module atcore gui Build test GUI aws-sdk-cpp access-management AWS Access Management, a meta-flag that enables: AWS Certificate Manager (ACM): Provision, manage, and deploy SSL/TLS certificates on AWS managed resources. AWS Data Exchange : A service that makes it easy for customers to find, subscribe to, and use third-party data in the AWS Cloud. AWS IAM Access Analyzer : Identify any policies that grant access to an external principal. Identity and Access Management (IAM): A web service for securely controlling access to AWS services. Resource Access Manager (RAM): Customers who operate multiple accounts can create resources centrally and use AWS RAM to share them with all of their accounts to reduce operational overhead. SSO : AWS Single Sign-On (SSO) makes it easy to centrally manage access to multiple AWS accounts and business applications and provide users with single sign-on access to all their assigned accounts and applications from one place. Also enables acm-pca, identity-management, identitystore, sso-oidc and sts (Security Token Service). apigateway Create and deploy your own REST and WebSocket APIs at any scale. Also enables apigatewaymanagementapi and apigatewayv2. appconfig Quickly deploy application configurations to applications of any size. backup AWS Backup is a fully managed backup service batch Run batch computing workloads on the AWS Cloud budgets Use AWS Budgets to plan service usage, service costs, and instance reservations. Also enables the following related modules: AWS Cost Explorer (CE) : Programmatically query cost and usage data. Cost and Usage Report (CUR): Programmatically create, query, and delete AWS Cost and Usage report definitions. chime Amazon Chime, a secure, real-time, unified communications service. cloud-desktop AWS end user computing services. AppStream 2.0: Fully managed, secure application streaming service. WorkDocs : Fully managed, secure enterprise storage and sharing service. WorkLink : Fully managed, cloud-based service that enables secure, one-click access to internal websites and web apps from mobile devices. WorkMail : Managed email and calendaring service. WorkSpaces : Cloud-based desktop experience for end users. Also enabled workmailmessageflow. cloud-dev Enables in-cloud developer tools: Cloud9 : Cloud-based integrated development environment IDE to write, run, and debug code. CodeArtifact: Secure and scalable artifact management service for software development. CodeBuild : Managed build service that compiles, runs unit tests and produces artifacts. CodeCommit : Privately store and manage Git repositories in the AWS cloud. CodeDeploy : Automate the deployment and updating of applications. CodeGuru : Provides intelligent recommendations for improving application performance, efficiency, and code quality in your Java applications. CodePipeline: Continuous delivery service to model, visualize, and automate the steps required to release software. CodeStar : Quickly develop, build, and deploy applications on AWS. Also enables codestar-connections and codestar-notifications. Honey Code : Fully managed service to quickly build mobile and web apps for teams. Queues : Simple queue class. Allows standard queue operations top, delete, and push. Also has higher level, asynchronous interface with callbacks. X-Ray : Provides request tracing, exception collection, and profiling capabilities. cloud-media AWS Media modules for transforming, converting, delivering and streaming media. Elastic Transcoder : Convert media files stored in Amazon S3 into media files in the formats required by consumer playback devices. Elemental Media Connect: Secure and flexible transport service for live video. Elemental Media Convert: Format and compress offline video content for delivery to televisions or connected devices. Elemental Media Live : Video service that allows easy and reliable creation of live outputs for broadcast and streaming delivery. Elemental Media Package: Just-in-time video packaging and origination service. (Includes mediapackage-vod) Elemental Media Store : Video origination and storage service.Manage video assets as objects in containers to build dependable, cloud-based media workflows. (Includes mediastore-data) Elemental Media Tailor : Personalization and monetization service that allows scalable server- side ad insertion. cloud-mobile AWS Mobile modules for handling mobile application management and delivery. Amplify : Comprehensive set of SDKs, libraries, tools, and documentation for client app development. AppSync : Enterprise level, fully managed GraphQL service with real-time data synchronization and offline programming features. Device Farm: Test iOS, Android and Fire OS apps on real, physical phones and tablets that are hosted by AWS. PinPoint : Engage customers by sending them email, SMS and voice messages, and push notifications. (Includes pinpoint-email and sms-voice) SNS : Amazon Simple Notification Service, see USE flag sns. Also enables mobile and mobileanalytics. cloudformation Create and provision AWS infrastructure deployments predictably and repeatedly. Use a template file to create and delete a collection of resources together as a single unit (a stack). cloudfront Delivers static and dynamic web content through a worldwide network of edge locations that provide low latency and high performance. cloudhsm Secure cryptographic key storage by providing managed hardware security modules in the AWS Cloud. Also enables cloudhsmv2. cloudsearch Fully managed service in the cloud to set up, manage, and scale a search solution for websites. Also enables cloudsearchdomain. cloudwatch Amazon CloudWatch monitors Amazon Web Services (AWS) resources and the applications run on AWS in real time. The following modules besides monitoring are also enabled: Application Insights: Monitor .NET and SQL Server applications. App Mesh : Monitor and control microservices running on AWS. CloudTrail : Monitor AWS deployments in the cloud by getting a history of AWS API calls, including API calls made via the AWS Management Console, the AWS SDKs, the command line tools, and higher-level AWS services. Compute Optimizer : Recommends optimal AWS compute resources for your workloads. GuardDuty : Continuous security monitoring service. Health : Provides personalized information about events that can affect the AWS infrastructure, guides through scheduled changes, and accelerates the troubleshooting of issues that affect AWS resources and accounts. Inspector : A security vulnerability assessment service that helps improve the security and compliance of AWS resources. Logs : Monitor, store, and access log files from Amazon EC2 instances, AWS CloudTrail, or other sources. Synthetics : Create canaries, configurable scripts that run on a schedule, to monitor your endpoints and APIs. cognito Create unique identities, authenticate these identities with identity providers and save mobile user data in the AWS Cloud. Enables cognito-identity, cognito-idp and cognito-sync config Provides a detailed view of the resources associated with your AWS account, including how they are configured, how they are related to one another, and how the configurations and their relationships have changed over time. dlm Amazon Data Lifecycle Manager (DLM): Manage the lifecycle of AWS resources. Create lifecycle policies to automate operations on specified resources. ebs Amazon Elastic Block Store (Amazon EBS) is a web service that provides block level storage volumes for use with EC2 instances. EBS volumes are highly available and reliable storage volumes that can be attached to any running instance and used like a hard drive. ec2 Amazon Elastic Compute Cloud (EC2) is a web service that provides resizeable computing capacity. This flag also enables the following modules: Auto Scaling : Set up dynamic and predictive scaling for scalable AWS resources. Also enables autoscaling-plans and application-autoscaling. EC2 Image Builder : Fully-managed AWS service that makes it easier to automate the creation, management, and deployment of customized, secure, and up-to-date “golden” server images that are pre-installed and pre-configured with software and settings to meet specific IT standards. Elastic File System: EFS provides file storage for Amazon EC2 instances. Savings Plan : Flexible pricing model that helps you save a significant percentage on Amazon EC2 and Fargate usage. ecr Amazon Elastic Container Registry (ECR) is a fully managed Docker container registry. ecs Amazon Elastic Container Service (ECS) is a highly scalable, fast, container management service. eks Amazon Elastic Kubernetes Service (EKS) is a managed service to run Kubernetes on AWS without own Kubernetes clusters. elastic-inference Amazon Elastic Inference is a service that allows you to attach low-cost GPU-powered acceleration to many Amazon machine instances in order to reduce the cost of running deep learning inference by up to 75%. Amazon Elastic Inference supports TensorFlow, Apache MXNet, and ONNX models through MXNet. elasticache Set up, manage, and scale distributed in-memory cache environments in the AWS Cloud elasticbeanstalk Quickly deploy and manage applications in the AWS Cloud. elasticloadbalancing Automatically distribute incoming application traffic across multiple targets, such as EC2 instances. Also enables elasticloadbalancingv2. elasticmapreduce Amazon Elastic MapReduce (EMR) processes large amounts of data efficiently using Hadoop processing combined with several AWS products. email Amazon Simple Email Service (Amazon SES): An email platform to send and receive email using ones own email addresses and domains. See: https://docs.aws.amazon.com/ses/latest/DeveloperGuide/Welcome.html Also enables sesv2 es Amazon Elasticsearch Configuration Service (ES) is an API to create, configure, and manage Elasticsearch domains. events Serverless event bus service to connect applications with data from a variety of sources. Also enables eventbridge. forecast Amazon Forecast is a fully managed deep learning service for time-series forecasting. Time- series forecasting is useful in multiple domains, including retail, financial planning, supply chain, and healthcare. Also enables the forecastquery module. frauddetector Amazon Fraud Detector is a fully managed service that helps you detect suspicious online activities such as the creation of fake accounts and online payment fraud. With Amazon Fraud Detector, you can create a fraud detection ML model with just a few clicks and use it to evaluate online activities in milliseconds. fsx Amazon FSx is a fully managed service to launch and use shared file storage. globalaccelerator AWS Global Accelerator is a network layer service for accelerators to improve availability and performance for internet applications used by a global audience. http Enable http support via curl iot AWS IoT This is a meta-flag for all Internet of Things modules provided by the SDK: iot : enables secure, bi-directional communication between Internet-connected things (such as sensors, actuators, embedded devices, or smart appliances) and the AWS Cloud over MQTT and HTTP. greengrass : Extends AWS onto physical devices so they can act locally on the data they generate. iot1click : A service for simple devices to trigger AWS Lambda functions that execute a specific action. iotanalytics : Provides advanced data analysis for AWS IoT. iotevents : Monitor equipment or device fleets for failures or changes in operation, and trigger actions when such events occur. iotsitewise : Easily collect, organize, and analyze data from industrial equipment at scale. iotthingsgraph: Integrated set of tools that enable developers to build IoT applications using devices and services that use different data representation standards and communication protocols. Also enables iot1click-devices, iot1click-projects, iot-data, iotevents-data, iot-jobs-data and iotsecuretunneling. kendra Amazon Kendra is a search service, powered by machine learning, that enables users to search unstructured text using natural language. kinesis Amazon Kinesis Collect, process, and analyze video and data streams in real time. The following modules besides kinesis are enabled: firehose : Load data streams into AWS data stores. ivs : Managed live streaming solution for creating interactive video experiences. kinesisanalytics: Process and analyze streaming data using SQL or Java. (Also enables kinesisanalyticsv2) kinesisvideo : Capture, process, and store video streams for analytics and machine learning. Additionally kinesis-video-archived-media, kinesis-video-media and kinesis-video-signaling are enabled. kms AWS Key Management Service (KMS) An encryption and key management service scaled for the cloud. lambda AWS Lambda: Run code without provisioning or managing servers. lex Amazon Lex is an AWS service for building conversational interfaces into applications using voice and text. Also enables lex-models. license-manager Streamlines the process of bringing software vendor licenses to the cloud. lightsail The easiest way to get started with AWS for developers who just need virtual private servers machinelearning The algorithms of Amazon Machine Learning create machine learning (ML) models by finding patterns in existing data. The service uses these models to process new data and generate predictions for application. macie A security service that uses machine learning to automatically discover, classify, and protect sensitive data in AWS. Also enables macie2 managedblockchain Create and manage scalable blockchain networks using popular open source frameworks. Currently, Managed Blockchain supports the Hyperledger Fabric open source framework. marketplace AWS Marketplace is an online store where you can buy or sell software that runs on Amazon Web Services (AWS). Marketplace support consists of the marketplacecommerceanalytics module plus: Marketplace Entitlement Service: A contract verification feature that AWS Marketplace sellers can use to verify the amount of the sellers product (for example, end user licenses or storage, data, or compute capacity) the customer has purchased. Marketplace Metering Service : A pricing and metering feature that AWS Marketplace sellers can use to directly charge for their software along one of four dimensions: users, data, bandwidth, or hosts. Also enables marketplace-catalog and pricing. networkmanager Transit Gateway Network Manager (Network Manager) enables you to create a global network, in which you can monitor your AWS and on-premises networks that are built around transit gateways. opsworks AWS OpsWorks is a simple and flexible way to create and manage stacks and applications. Also enables opsworkscm. organizations Account management service that to consolidate multiple AWS accounts into an organization to be centrally managed. other This is a meta-flag for rarely needed modules that in themselves need not much build time. If you would like to have any of the following modules to have their own USE flag, please open a bug report and it will most probably get one. The modules are: AWSMigrationHub, alexaforbusiness, appflow, braket, clouddirectory, comprehend, comprehendmedical, connect, datapipeline, datasync, directconnect, discovery, dms, docdb, ds, dynamodb, gamelift, glue, groundstation, importexport, kafka, lakeformation, migrationhub- config, mq, mturk-requester, neptune, quicksight, redshift, robomaker, sdb, schemas, service- quotas, servicecatalog, servicediscovery, signer, sms, snowball, ssm, states, storagegateway, support and swf. outposts AWS Outposts brings native AWS services, infrastructure, and operating models to virtually any data center, co-location space, or on-premises facility. You can use the same services, tools, and partner solutions to develop for the cloud and on premises. personalize Real-time personalization and recommendations, based on the same technology used at Amazon.com. Also enables personalize-events and personalize-runtime. polly Amazon Polly A Text-to-Speech (TTS) cloud service that converts text into lifelike speech. Also enables text-to-speech, which needs you to enable pulseaudio support to work. qldb Amazon Quantum Ledger Database (Amazon QLDB) is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log owned by a central trusted authority. You can use Amazon QLDB to track all application data changes, and maintain a complete and verifiable history of changes over time. Also enables qldb-session. queues AWS Queues is a simple queue class. Allows standard queue operations top, delete, and push. Also has higher level, asynchronous interface with callbacks. rds Amazon Relational Database Service (RDS) is a web service to set up, operate, and scale a relational database in the cloud. Also enables pi (Performance Insights) and rds-data. rekognition Add image and video analysis to applications. resource-groups AWS Resource Groups and Tag Editor Organize AWS resources into groups, tag resources using virtually any criteria, and manage, monitor, and automate tasks on grouped resources. Also enables resourcegroupstaggingapi. (Resource Groups Tagging API) route53 AWS Route 53 is a highly available and scalable Domain Name System (DNS) web service. Also enables route53domains and route53resolver. rtti Flag to enable/disable rtti within the library s3 Amazon Simple Storage Service Storage for the internet. Additionally to the s3 module, the following modules are activated: Athena : Interactive query service to analyze data in Amazon S3 using standard SQL. Glacier : Storage solution for cold data. Transfer for SFTP: Transfer files directly into and out of Amazon S3 using SFTP. Also enables s3-encryption, s3control and transfer. sagemaker Amazon SageMaker Fully managed machine learning service. With Amazon SageMaker, data scientists and developers can quickly and easily build and train machine learning models, and then directly deploy them into a production-ready hosted environment. Also enables sagemaker-a2i-runtime and sagemaker-runtime. secretsmanager Encrypt, store, and retrieve credentials for databases and other services. securityhub Provides a comprehensive view of the security state of AWS resources. serverlessrepo AWS Serverless Application Repository Enables teams, organizations, and individual developers to find, deploy, publish, share, store, and easily assemble serverless architectures. shield AWS Shield, protection against DDoS attacks sns Amazon Simple Notification Service (SNS) is a web service that enables applications, end-users, and devices to instantly send and receive notifications from the cloud. sqs Amazon Simple Queue Service (SQS): Fully managed message queuing service that makes it easy to decouple and scale microservices, distributed systems, and serverless applications. textract Amazon Textract to add document text detection and analysis to applications. transcribe A transcription services for audio files. It uses advanced machine learning technologies to recognize spoken words and transcribe them into text. Also enables transcribestreaming. translate A neural machine translation service for translating text to and from English across a breadth of supported languages. unity-build Build using a single unified .cpp file for each service library. Reduces the size of static library binaries waf The Web Application Firewall (WAF) can monitor web requests that are forwarded to Amazon CloudFront distributions or an Application Load Balancer. Can also be used to block or allow requests based on conditions such as the IP addresses that requests originate from or values in the requests. Also enables fms, waf-regional and wafv2 bitset tcmalloc Use tcmalloc from dev-util/google-perftools for allocations boost context Build and install the Boost.Context (and Boost.Fiber) library and all other Boost libraries that depend on it debug Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost. doc Install the full API documentation documentation. This takes over 200MB of extra disk space. nls Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries. numpy Optionally build NumPy extensions when Boost.Python is enabled threads Build multi-thread-compatible libraries instead of single-threaded only. tools Build and install the boost tools (bcp, quickbook, inspect, wave) botan boost use dev-libs/boost check subunit Enable support for the subunit unit test protocol crypto++ asm Support assembly hand optimized crypto functions (i.e. faster run time) cudnn cuda10-1 On nVidia CUDA 10.1. cuda10-2 On nVidia CUDA 10.2. cyberjack tools Build and install optional management tools. usb Enable support for usb based chipcard reader. cyrus-sasl authdaemond Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier) ldapdb Enable ldapdb plugin openldap Add ldap support for saslauthd sample Enable sample client and server srp Enable SRP authentication urandom Use /dev/urandom instead of /dev/random date only-c-locale Build only the C locale dbus-c++ ecore Use Ecore integration glib Use glib integration eekboard libcanberra Enable support for media-libs/libcanberra xtest Enable support for x11-libs/libXtst efl avif Enable AVIF image loader bmp Enable WBMP image loader dds Enable DDS image loader drm Enable DRM engine eet Enable Eet image loader efl-one Combine multiple core libraries into one libefl.so fribidi Enable bidirectional text support glib Enable dev-libs/glib support harfbuzz Enable complex text shaping and layout support hyphen Enable text hyphenation support ibus Enable Intelligent Input Bus ico Enable Ico image loader json Enable lottie animation support luajit USE dev-lang/luajit instead of dev-lang/lua mono Enable mono bindings physics Enable Bullet physics effects and support pmaps Enable PMAPS image loader psd Enable PSD image loader scim Enable Smart Common Input Method system-lz4 Use system liblz4 instead of bundled one tga Enable Tga image loader tgv Enable Tgv image loader tslib Enable x11-libs/tslib for touchscreen events unwind Enable debug support via sys-libs/libunwind xcf Enable XCF image loader xim Enable X Input Method xpresent Enable x11-libs/libXpresent support elfutils lzma Support automatic decompression of LZMA-compressed files and kernel images threads Build the libraries with thread safe support utils Install command-line utilities (all the eu-* programs) valgrind Add support for memory debugging using dev-util/valgrind ell glib Enable dev-libs/glib support fcgi html Install HTML documentation folks telepathy Load contacts from the Telepathy framework tracker Load contacts from app-misc/tracker index utils Build the folks-inspect utility fstrm utils Build fstrm utility programs gf2x custom-tune Extra long compile time for tuning hardware specific low-level routines fft Build an FFT API for multiplication of 2 polynomials over GF(2) gjs sysprof Enable profiling data capture support using dev-util/sysprof-capture glib dbus Enable dependencies required by glib libraries using dbus service to manage settings saving mime Pull in shared MIME database that many glib-based applications require at runtime to detect or open files. Warning: do not disable this flag unless installing on a headless server. systemtap Build support for profiling and tracing using dev-util/systemtap utils Install gtester-report utility to generate test report files for your software; build gresource utility with ELF support. gmime smime Enable experimental S/MIME support gmp asm Enable use of hand optimized assembly routines (faster execution) pic Force static libraries to be built as PIC to avoid TEXTRELs. gobject-introspection doctool Install g-ir-doc-tool for generating documentation from introspected data hidapi fox Build a x11-libs/fox GUI input-pad eekboard Enable support for dev-libs/eekboard xtest Enable support for x11-libs/libXtst intel-neo l0 Install the oneAPI Level Zero driver alongside the OpenCL one vaapi Support the sharing of surfaces with Video Acceleration API (OpenCL Extension #36) jemalloc hugepages Enable transparent huge page support lazy-lock Enable lazy locking (only lock when multi-threaded) prof Enable allocation profiling stats Enable statistics calculation/reporting xmalloc Add support for xmalloc (abort-on-out-of-memory) kreport marble Enable displaying of maps using kde-apps/marble scripting Support Qml scripting using dev-qt/qtdeclarative libbase58 tools Build command line base58 tool libbytesize tools Build bscalc python CLI tool libcbor custom-alloc Custom, dynamically defined allocator support libcdio minimal Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library. libcec cubox Enable support for enable support for the TDA995x exynos Enable support for Exynos chipsets kernel-cec Enable support for Linux kernel CEC framework raspberry-pi Enable support for the Raspberry Pi tools Enable build of cec-client and other test and demo executable tools udev Enable detection of USB-CEC port by udev xrandr Enable detection of active HDMI using xrandr extensions libcgroup daemon Install the configuration tools and init/config files. tools Install the cgroup rules processing daemon and init/config files. libcharon client Install the charon client library libclsync extra-debug Enable extra debugging. This will hurt performance badly. Be ready for tons of output. extra-hardened Enable extra security checks. This may hurt performance. libdbusmenu gtk Enable support for GTK+2 gtk3 Enable support for GTK+3 libdynd cuda Enable NVIDIA CUDA toolkit support libevent clock-gettime Disable use of clock_gettime even if it is available debug Support for running in debug mode malloc-replacement Support for replacing the memory management functions mbedtls Support for net-libs/mbedtls encryption ssl Support for dev-libs/openssl encryption verbose-debug Support for verbose debug logging libffi pax_kernel Use PaX emulated trampolines, for we can't use PROT_EXEC libffi-compat pax_kernel Use PaX emulated trampolines, for we can't use PROT_EXEC libflatarray cuda Enables plugins for NVIDIA GPUs (e.g. CUDAAllocator) libgcrypt o-flag-munging Enable O-flag mangling during build libgdata crypt Use app-crypt/gcr for keeping tokens and passwords in non-pageable memory for improved security gnome-online-accounts Enable net-libs/gnome-online-accounts support libgit2 gssapi Enable GSSAPI support for SPNEGO auth ssh Enable SSH transport support trace Enable tracing support libgit2-glib ssh Enable SSH transport support libgpg-error common-lisp Install common-lisp files libgpiod tools Build some useful gpio tools that use libgpiod. libgpuarray cuda Enable NVIDIA CUDA toolkit support opencl Enable OpenCL support libgweather glade Installs catalog files for dev-util/glade libical glib Enable dev-libs/glib interface support libisoburn external-filters Allow the use of external processes as file content filters (Note: this is a potential security risk) external-filters-setuid Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk) frontend-optional Use dev-tcltk/bwidget which is not strictly required for the frontend launch-frontend Enable the tcl gui for xorriso launch-frontend-setuid Enable the tcl gui for xorriso under setuid libisofs verbose-debug Enable verbose debug messages libjcat gpg Enable GPG verification support via app-crypt/gpgme man Generate and install man pages pkcs7 Enable PKCS7 verification support via net-libs/gnutls liblogging rfc3195 Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it! stdlog Enables liblogging's core component (think of it as a the next version of the syslog(3) API). libmemcached hsieh Use Hsieh hash algorithm. libevent Use the libevent event loop interface. sasl Use sasl auth for communications. libnfc pcsc-lite Enable NFC drivers that require pcsc-lite libnl doc Install development documentation python Install experimental dev-lang/python bindings utils Install command line interface utils liborcus spreadsheet-model Enable the spreadsheet model implementation tools Build various low-level parsers libowfat diet Compile against dev-libs/dietlibc libp11 doc Generate and install API documentation for the package. libpcre bzip2 Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2). pcre16 Build PCRE library for 16 bit characters (e.g. UTF-16). pcre32 Build PCRE library for 32 bit characters (e.g. UTF-32). readline Add support for command line editing to pcretest, through sys-libs/readline. recursion-limit Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit. zlib Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib). libpcre2 bzip2 Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2). pcre16 Build PCRE library for 16 bit characters (e.g. UTF-16). pcre32 Build PCRE library for 32 bit characters (e.g. UTF-32). readline Add support for command line editing to pcretest, through sys-libs/readline. recursion-limit Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit. zlib Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib). libpeas glade Install the glade catalog python Build support for loading dev-lang/python plugins librdkafka lz4 Enable support for Kafka's LZ4 compression based on KIP-57 (uses app-arch/lz4) librelp gnutls Use GnuTLS libressl Use LibreSSL openssl Use OpenSSL libressl asm Enables assembly libsecp256k1 asm Enable x86_64 assembly optimisation ecdh Enable ECDH shared secret computation endomorphism Enable endomorphism experimental Allow experimental USE flags recovery Enable ECDSA pubkey recovery module schnorr Enable Schnorr signature module test-openssl Enable OpenSSL comparison tests libslz tools Install additional tools (zenc, zdec) libsodium asm Enables assembly implementations urandom Use /dev/urandom instead of /dev/random libtasn1 valgrind Enable usage of dev-util/valgrind in debug libtermkey demos Install demos, which pulls in dev-libs/glib libucl regex Enable regex support sign Enable signatures check urls Enable URLs fetch utils Install utils for checking other configs libunibreak doc Install html API documentation. man Generate man pages with doxygen. libverto glib Support event loops using dev-libs/glib libev Support event loops using dev-libs/libev libevent Support event loops using dev-libs/libevent tevent Support event loops using sys-libs/tevent libvoikko expvfst Enable experimental features of VFST morphology backend hfst Enable HFST morphology backend libxmlb stemmer Enable language stemming support libzia ftdi Enable support for FTDI USB chips libzip mbedtls Use net-libs/mbedtls as TLS provider tools Install binary tools to compare, modify and merge zip files link-grammar aspell Adds support for app-text/aspell spell checker hunspell Adds support for app-text/hunspell spell checker log4cplus iconv Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation working-c-locale Use the C99 locale facilities for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation working-locale Use C++'s std::locale for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation log4cxx smtp Offer SMTP support via net-libs/libesmtp m17n-lib X Build the Graphical User Interface API and utilities anthy Enable support for app-i18n/anthy input method athena Enable the MIT Athena widget set (x11-libs/libXaw) gd Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled libotf Use dev-libs/libotf to handle OpenType fonts libxml2 Use dev-libs/libxml2 to parse XML msgpack boost Enable boost support nettle asm Support assembly hand optimized crypto functions (i.e. faster run time) nss cacert Include root/class3 certs from CAcert (http://www.cacert.org/) utils Install utilities included with the library ocl-icd khronos-headers Install Khronos OpenCL headers. onigmo combination-explosion-check enable combination explosion check crnl-as-line-terminator enable CR+NL as line terminator oniguruma crnl-as-line-terminator enable CR+NL as line terminator opencryptoki tpm Enable support for Trusted Platform Module (TPM) using app-crypt/trousers openct debug Add debug output to the driver library for pcsc-lite. pcsc-lite Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT. openobex irda Enable IrDA support opensc ctapi Use CT-API for accessing Smartcard hardware notify Enable notifications openct Use dev-libs/openct (and CT-API) for accessing Smartcard hardware pcsc-lite Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware secure-messaging Enable secure messaging openssl asm Support assembly hand optimized crypto functions (i.e. faster run time) bindist Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI rfc3779 Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers) sslv2 Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https sslv3 Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https tls-heartbeat Enable the Heartbeat Extension in TLS and DTLS openssl-compat asm Support assembly hand optimized crypto functions (i.e. faster run time) bindist Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI rfc3779 Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers) sslv2 Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https sslv3 Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https tls-heartbeat Enable the Heartbeat Extension in TLS and DTLS pkcs11-helper nss Enable NSS crypto engine poco 7z Add Support for the 7z archive format cppparser Build and install a minimal C++ parser crypto Encryption and digital signing classes data Database abstraction layer to easily send/retrieve data to/from various databases file2pagecompiler Utility to convert ordinary files to Page Compiler source files json Add JSON support mariadb Prefer dev-db/mariadb-connector-c over dev-db/mysql-connector-c mongodb Add dev-db/mongodb support net Classes to write network clients & servers pagecompiler Simple compiler translating HTML pages containing embedded C++ code into HTTPRequestHandler classes pocodoc POCO documentation generator util Several utility classes (like logger, timer, config file parser) zip Add support for the zip & gz archive formats ppl cdd Build the ppl_lcdd program for vertex/facet enumeration accepting the same input format as the programs shipped with sci-libs/cddlib and sci-libs/lrslib lpsol Build the ppl_lpsol linear program solver that uses sci-mathematics/glpk for its input routines serdisplib tools Build optional tools. softhsm gost Enable gost algorithm migration-tool Build db migration tool starpu cuda Enable NVIDIA CUDA toolkit support gcc-plugin Enable GCC extension plugin (experimental) opencl Enable OpenCL support spinlock-check Enable spinlock check valgrind Enable dev-util/valgrind support stp python Enable building the Python interface tinyxml stl Compile with TIXML_USE_STL support tntnet server Enable tntnet server daemon totem-pl-parser archive Enables ISO detection with app-arch/libarchive crypt Support AmazonAMZ decoding with dev-libs/libgcrypt quvi Use media-libs/libquvi for parsing video links tvision gpm Support text mode mouse through sys-libs/gpm ucommon socks Build with socks proxy support userspace-rcu regression-test Run regression tests (requires FEATURES=test) ustr ustr-import Install ustr-import developer program and source code for bundling. weston desktop Enable the desktop shell drm Enable drm compositor support editor Install wayland-editor example application fbdev Enable fbdev compositor support fullscreen Enable fullscreen shell gles2 Use GLESv2 cairo instead of full GL headless Headless backend and a noop renderer, mainly for testing purposes ivi Enable the IVI shell kiosk Enable the kiosk shell launch Install weston-launch utility pipewire Enable virtual remote output with Pipewire on DRM backend rdp Enable Remote Desktop Protocol compositor support remoting Enable plugin to stream output to remote hosts using media-libs/gstreamer resize-optimization Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi screen-sharing Enable screen-sharing through RDP wayland-compositor Enable Wayland compositor support xwayland Enable ability support native X11 applications xapian brass Enabled brass backend db support chert Enabled chert backend db support inmemory Enabled inmemory backend db support remote Enabled remote backend db support xerces-c iconv Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle) threads Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended xmlrpc-c abyss Build the Abyss mini web-server. libxml2 Use dev-libs/libxml2 to parse XML instead of the internal expat library. threads Controls whether to build the Abyss web-server with pthreads or fork 'threading'. tools Build the xmlrpc* tools. xmlsec gcrypt Install xmlsec-gcrypt library gnutls Install xmlsec-gnutls library nss Install xmlsec-nss library openssl Install xmlsec-openssl library yaz ziffy Install ziffy, a promiscuous Z39.50 APDU sniffer dev-lisp clisp hyperspec Use local hyperspec instead of online version svm Build CLISP with support for the Support Vector Machine module clx doc Builds documentation cmucl X Build CLX, CLM, or Hemlock doc Installs package documentation source Include source code for CMUCL in installation ecls gengc Use generational garbage collection (experimental) libatomic Use dev-libs/libatomic_ops library precisegc Use type information during garbage collection (experimental) gcl ansi Build a GCL with ANSI support (else build a traditional CLtL1 image) athena Build xgcl - an interface to x11-libs/libXaw sbcl pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel dev-lua lua-cjson internal-fpconv Enable internal number conversion routines, can increase overall performance by up to 50% dev-ml cairo-ocaml pango Enable support for x11-libs/pango csv lwt Enables the Lwt-based library for asynchronous operations. dose3 parmap Adds multi-core CPU support via dev-ml/parmap. rpm4 Adds support for handling rpm4 files. zip Adds support for handling zip files. eliom ppx Enable PPX syntax extension support. js_of_ocaml camlp4 Build with camlp4 syntax extensions. deriving Enable dev-ml/deriving support for improving the type safety. lwt Enable dev-ml/lwt support. ppx Enables the ppx syntax extension react Enable functionnal reactive programming support. lablgtk glade Enable libglade bindings compilation. gnomecanvas Enable libgnomecanvas bindings compilation. sourceview Enable GtkSourceView support logs cli Enables the Logs_cli library that provides command line support for controlling Logs. fmt Enables the Logs_fmt reporter. lwt Enables the Logs_lwt library that provides Lwt logging functions. lwt camlp4 Enable camlp4 syntax extension libev Enable the dev-libs/libev-based backend. ppx Enables the ppx syntax extension ocaml-cohttp async Enables support for the dev-ml/async asynchronous execution library. lwt Enables support for the dev-ml/lwt cooperative light-weight thread library. ocaml-cstruct async Support for asynchronous execution lwt Enable threads via lwt ppx Enable the ppx syntax extension ocaml-fileutils ocamlopt Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml. ocamlnet httpd Enables net-httpd web server component zip Enables netzip support to read/write gzip data using object channels pgocaml camlp4 Enable PG'Ocaml syntax extension. stdlib-shims ocamlopt Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml. tyxml camlp4 Enables the camlp4 syntax extension (deprecated) ppx Enables the ppx syntax extension (preferred) uutf utftrip Builds and install the utftrip executable: Among other things, reads unicode on stdin and rewrites it on stdout. zarith mpir Use MPIR library instead of GMP. dev-perl App-Nopaste browser Spawn browser with pasted page clipboard copying of URLs with -x/--copy gitlab Ensure git is installed for reading/passing GitLab authentication pastebin pastebin.com support Boulder genbank Provide support with Boulder::Genbank for decoding Genbank data records store Provide support with Boulder::Store for persisting Stone objects Business-ISBN barcode Install dev-perl/GD-Barcode for rendering ISBN numbers as barcodes Config-Any conf Install dev-perl/Config-General to support decoding .conf/.cnf files ini Install dev-perl/Config-Tiny to support decoding INI config files json Install support libraries to support decoding JSON config files xml Install support libraries to support decoding XML config files yaml Install support libraries to support decoding YAML config files Cookie-Baker xs Install dev-perl/Cookie-Baker-XS for accelerated performance Coro ev Build support for using dev-perl/EV as an event-loop via Coro::EV event Build support for using dev-perl/Event as an event-loop via Coro::Event DBD-MariaDB mariadb Use dev-db/mariadb-connector-c as the client library mysql Use dev-db/mysql-connector-c as the client library DBD-SQLite system-sqlite Use the system-wide dev-db/sqlite installation DBD-mysql mariadb Use dev-db/mariadb-connector-c as the client library mysql Use dev-db/mysql-connector-c as the client library ssl Compile in support for SSL connections via libmysqlclient DBIx-Class admin Modules required for the DBIx::Class administrative library admin-script Modules required for the CLI DBIx::Class interface dbicadmin deploy Modules required for "deploy" in DBIx::Class::Storage::DBI and "deploymen_statements" in DBIx::Class::Storage::DBI replicated Modules required for DBIx::Class::Storage::DBI::Replicated File-HomeDir xdg Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs File-Which pwhich Install dev-perl/App-pwhich which used to be a part of this package GD animgif Enable animated gif support fcgi Build for FastCGI compatibility via dev-libs/fcgi instead of using PerlIO Graphics-ColorNames recommended Install recommended support modules HTML-Mason modperl Enable www-apache/mod_perl support HTTP-Entity-Parser xs Install C-Based dependieces for faster performance JSON xs Install C-based dev-perl/JSON-XS for faster performance JSON-MaybeXS xs Install a C-Based backend to make JSON encode/decode fast Lab-VXI11 libtirpc Build against net-libs/libtirpc for RPC support List-MoreUtils xs Install C-Based backend implementation for performance MCE sereal Install dev-perl/Sereal-Encoder and decoder for faster worker IPC Mail-IMAPClient md5 Install support for DIGEST-MD5 and CRAM-MD5 Authentication ntlm Install support for NTLM Authentication ssl Install support for SSL Connections zlib Install support for COMPRESS DEFLATE connections Net-SSH2 gcrypt Use libgcrypt instead of openssl PDL badval Enable bad values support hdf Enable HDF (version 4) format support netpbm Enable NETPBM and MPEG support pdl2 Build pdf2 shell (requires Devel-REPL) pgplot Enable PGPLOT plotting capabilities Ref-Util xs Install C-Based dev-perl/Ref-Util-XS for accelerated performance Sub-Name suggested Install extra dependencies needed for extended regression tests Sysadm-Install hammer Enable hammer() funtion to run a command in the shell and simulate a user hammering the ENTER key to accept defaults on prompts Test-Warnings suggested Install optional dependencies for extra tests Text-CSV xs Install dev-perl/Text-CSV_XS for accelerated decoding WWW-Form-UrlEncoded xs Install C-Based dependieces for faster performance perl-headers debug Add source locations in generated .ph files to assist with debugging when errors occur sizeof-warning Include logic to warn when a .ph file tries to use a sizeof() that is unknown dev-php PEAR-HTTP_Request2 curl Force dev-lang/php to be compiled with curl extension fileinfo Force dev-lang/php to be compiled with fileinfo extension ssl Force dev-lang/php to be compiled with ssl extension zlib Force dev-lang/php to be compiled with zlib extension PEAR-PHP_Beautifier cli Require dev-lang/php to be built with the "cli" SAPI and install the php_beautifier script. agavi executable Install the "agavi" executable used to manage projects. This requires dev-php/phing, and may be omitted if you are (for example) deploying an existing site to a production server. maxmind-db-reader extension Build the C extension that uses dev-libs/libmaxminddb pecl-apcu lock-pthreadmutex Enable pthread mutex locking lock-pthreadrw Enable pthread read/write locking lock-semaphore Enable semaphore locks instead of fcntl lock-spinlock Enable spin locks (EXPERIMENTAL) pecl-event extra Add support of the Libevent extra API pecl-memcached igbinary Enable support for the igbinary serializer json Enable support for json serialization pecl-redis igbinary Enables igbinary serialisation support json Enables json serializer support pecl-zmq czmq Use the czmq high level bindings phing zip Support zip archives by requiring said support in dev-lang/php. swoole http2 Add support for HTTP/2 protocol via net-libs/nghttp2 dev-python PyQt5 bluetooth Build bindings for the QtBluetooth module dbus Build bindings for the QtDBus module declarative Build bindings for the QtQml/QtQuick modules and enable the qmlscene plugin designer Build bindings for the QtDesigner module and enable the designer plugin gui Build bindings for the QtGui module help Build bindings for the QtHelp module location Build bindings for the QtLocation module multimedia Build bindings for the QtMultimedia module network Build bindings for the QtNetwork module networkauth Build bindings for the QtNetworkAuth module opengl Build bindings for the QtOpenGL module positioning Build bindings for the QtPositioning module printsupport Build bindings for the QtPrintSupport module sensors Build bindings for the QtSensors module serialport Build bindings for the QtSerialPort module sql Build bindings for the QtSql module svg Build bindings for the QtSvg module testlib Build bindings for the QtTest module webchannel Build bindings for the QtWebChannel module webkit Build bindings for the QtWebKit module websockets Build bindings for the QtWebSockets module widgets Build bindings for the QtWidgets module x11extras Build bindings for the QtX11Extras module xmlpatterns Build bindings for the QtXmlPatterns module PythonQt extensions Install extensions QtPy designer Build bindings for the QtDesigner module and enable the designer plugin gui Build bindings for the QtGui module printsupport Build bindings for the QtPrintSupport module svg Build bindings for the QtSvg module testlib Build bindings for the QtTest module webengine Build bindings for the QtWebEngine module autobahn scram Add support for WAMP-SCRAM authentication xbr Add support for XBR decentralized data markets and etherium blockchain cryptography idna enable support for the old, deprecated IDNA specification (RFC 3490) ctypescrypto gost Build with support for GOST Message Authentication Code cvxopt dsdp Use interior point library sci-libs/dsdp glpk Use GNU Linear Programming Kit sci-mathematics/glpk drf-yasg validation Enable swagger spec validation using swagger-spec-validator editorconfig-core-py cli Install command line interface as well as python library falcon cython Build cython-based python modules glance_store cinder enable cinder backend supprt swift enable swift backend supprt vmware enable vmware backend supprt gmpy mpir Use sci-libs/mpir as gmp implementation hypothesis cli Install a CLI tool used to write tests. icalendar doc Generate examples and other extra documentation ipython matplotlib Add support for dev-python/matplotlib nbconvert Enable support for converting notebooks to various formats using app-text/pandoc notebook Install requirements for the web notebook based on www-servers/tornado kombu mongodb Enables MongoDB backend msgpack Enables MessagePack (de)serializer for Python redis Enables Redis backend sqs Enables Amazon SQS transport module for Kombu yaml Enables yaml backend matplotlib excel Pull dev-python/xlwt for the exceltools toolkit gtk3 Enable x11-libs/gtk+:3 support mpmath matplotlib Add support for dev-python/matplotlib msgpack native-extensions Compiles native "C" extensions (speedups, instead of using python fallback code). nbdime webtools Install web-based diff and merge tools. netaddr cli Enable netaddr shell with dev-python/ipython networkx extras Provide graph drawing and graph layout algorithms along with shapefile format reading and writing pandas Provides a DataFrame, which is a tabular data structure with labeled axes scipy Enables scipy backend yaml Provides YAML format reading and writing nltk-data extra Install the complete set of data files. Otherwise, only files required by tests are installed. nose coverage Pull in dev-python/coverage needed for nose-xcover plugin. numexpr mkl Enable support for Intel Vector Math Library, part of sci-libs/mkl. pandas full-support Pull all packages to give pandas full support paramiko server Enable server feature passlib bcrypt bcrpyt hash algoryptm support scrypt accelerated scrypt algoythm support totp time based one time password support pillow imagequant Build with Image Quantization Library support py-amqp extras Install extra tools to generate initial Python mod from an AMQP XML file pygame midi Enable midi support using media-libs/portmidi pyglet image Enable support for image formats other than PNG and BMP pyilmbase exceptions Enable runtime floating point exceptions in PyIMath. numpy Add bindings for dev-python/numpy use. pyocr cuneiform Enable support for the app-text/cuneiform OCR engine tesseract Enable support for the app-text/tesseract OCR engine pypax ptpax Enable PT_PAX_FLAGS support. xtpax Enable XATTR_PAX_FLAGS support. pypy-exe low-memory Build using PyPy with the engine configured towards low memory footprint. This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time. pypy3-exe low-memory Build using PyPy with the engine configured towards low memory footprint. This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time. pyside2 3d Build Qt3DCore, Qt3DAnimation, Qt3DExtras, Qt3DInput, Qt3DLogic, and Qt3DRender modules charts Build QtCharts module concurrent Build QtConcurrent module datavis Build QtDataVisualization module designer Build QtDesigner and QtUiTools modules gles2-only Build QtGui "QOpenGL*" classes gui Build QtGui module help Build QtHelp module location Build QtLocation module multimedia Build QtMultimedia and QtMultimediaWidgets modules network Build QtNetwork module positioning Build QtPositioning module printsupport Build QtPrintSupport module qml Build QtQml module quick Build QtQuick and QtQuickWidgets modules script Build QtScript module scripttools Build QtScriptTools module scxml Build QtScxml module sensors Build QtSensors module speech Build QtTextToSpeech module sql Build QtSql module svg Build QtSvg module testlib Build QtTest module webchannel Build QtWebChannel module webengine Build QtWebEngine and QtWebEngineWidgets modules websockets Build QtWebSockets module widgets Build QtWidgets module x11extras Build QtX11Extras module xml Build QtXml module xmlpatterns Build QtXmlPatterns module python-mpd twisted Enable twisted support python-stdnum vies Enable VIES pyudev qt5 Install PyQt5 bindings pyyaml libyaml enable support for C implementation using libyaml pyzmq draft Enable draft API support rarfile compressed Enables the module to support compressed v3 archives by calling the app-arch/unrar. rfc3986 idna enable support for the IDNA specification (RFC 5891) scipy sparse Adds support for sparse solving with sci-libs/umfpack shiboken2 docstrings Expose documentation as Python docstrings (recommended) numpy Implicitly convert passed NumPy arrays to Qt lists vulkan Generate "QSurface::VulkanSurface" bindings simplespectral faster Use dev-python/scipy to speed up drawing fastest Use dev-python/pyFFTW to speed up drawing to the max socketpool eventlet Install dev-python/eventlet as needed for the eventlet backend. gevent Install dev-python/gevent as needed for the gevent backend. sympy imaging Add support for dev-python/pillow ipython Add support for dev-python/ipython mathml Add support for mathml pyglet Use dev-python/pyglet for plots and print preview symengine Add support for a dev-python/symengine backend texmacs Add app-office/texmacs interface theano Add support for dev-python/theano tappy yaml Pull dependencies needed to support YAML blocks associated with test results. tinyrpc gevent Add support for gevent httpclient Add support for httpclient jsonext Add support for jsonext websocket Add support for websocket wsgi Add support for wsgi zmq Add support for zmq translate-toolkit html Support conversion between po and html files ical Support conversion between po and ical files ini Support conversion between po and ini files subtitles Support conversion between po and sub files yaml Support YAML format twisted conch include Twisted SSHv2 implementation http2 include http2 support serial include serial port support urllib3 brotli Enable support for brotli compression ws4py client Install client modules server Install server modules zeep async Add async support tornado Add tornado support dev-qt designer declarative Build the qdeclarativeview plugin webkit Build the qwebview plugin linguist-tools qml Enable QML support in lupdate qdoc qml Enable QML/JS parsing support qt-creator android Build plugin for Android devices autotest Enable integration with popular unit testing frameworks (QtTest, Google Test, Boost.Test) autotools Build plugin for autotools-based projects baremetal Build plugin for bare metal devices bazaar Add support for GNU Bazaar version control system (requires manual installation of Bazaar client) beautifier Build the beautifier plugin (supports astyle, clang-format, and uncrustify) boot2qt Build plugin for Boot2Qt devices clang Build clang-based plugins (code model, formatting, static analysis) clearcase Add support for IBM ClearCase version control system (requires manual installation of ClearCase client) cmake Build plugin for CMake-based projects cppcheck Enable integration with dev-util/cppcheck ctfvisualizer Build the Chrome Trace Format visualizer plugin designer Enable designer for QtWidgets-based UIs glsl Build the GLSL editor plugin help Enable the integrated documentation viewer ios Build plugin for Apple iOS devices lsp Add support for the Language Server Protocol (LSP) mcu Build plugin for MCU devices mercurial Add support for dev-vcs/mercurial version control system modeling Build the graphical model editor plugin nim Build plugin for Nim language support perforce Add support for Perforce version control system (requires manual installation of Perforce client) perfprofiler Build the Linux Perf-based profiler plugin python Build plugin for Python language support qbs Build plugin for QBS-based projects qmldesigner Enable designer for QML/QtQuick-based UIs qmljs Build the QML/JavaScript editor plugin qmlprofiler Build the QML profiler plugin qnx Build plugin for QNX devices remotelinux Add support for deployment and execution on a remote Linux host scxml Build the graphical SCXML editor plugin serialterminal Build the serial terminal plugin silversearcher Enable integration with sys-apps/the_silver_searcher systemd Add support for retrieving application output from journald valgrind Enable integration with dev-util/valgrind webassembly Build WebAssembly plugin webengine Use dev-qt/qtwebengine to view documentation winrt Build plugin for WinRT devices qt-docs 3d Install documentation for dev-qt/qt3d assistant Install documentation for dev-qt/assistant bluetooth Install documentation for dev-qt/qtbluetooth charts Install documentation for dev-qt/qtcharts concurrent Install documentation for dev-qt/qtconcurrent datavis Install documentation for dev-qt/qtdatavis3d declarative Install documentation for dev-qt/qtdeclarative designer Install documentation for dev-qt/designer gamepad Install documentation for dev-qt/qtgamepad (available in qt overlay only) graphicaleffects Install documentation for dev-qt/qtgraphicaleffects gui Install documentation for dev-qt/qtgui help Install documentation for dev-qt/qthelp html Install documentation in HTML format imageformats Install documentation for dev-qt/qtimageformats linguist Install documentation for dev-qt/linguist location Install documentation for dev-qt/qtlocation multimedia Install documentation for dev-qt/qtmultimedia network Install documentation for dev-qt/qtnetwork networkauth Install documentation for dev-qt/qtnetworkauth positioning Install documentation for dev-qt/qtpositioning printsupport Install documentation for dev-qt/qtprintsupport qch Install documentation in QCH format qdoc Install documentation for dev-qt/qdoc quickcontrols Install documentation for dev-qt/qtquickcontrols quickcontrols2 Install documentation for dev-qt/qtquickcontrols2 script Install documentation for dev-qt/qtscript scxml Install documentation for dev-qt/qtscxml sensors Install documentation for dev-qt/qtsensors serialbus Install documentation for dev-qt/qtserialbus serialport Install documentation for dev-qt/qtserialport speech Install documentation for dev-qt/qtspeech sql Install documentation for dev-qt/qtsql timeline Install documentation for dev-qt/qtquicktimeline virtualkeyboard Install documentation for dev-qt/qtvirtualkeyboard webchannel Install documentation for dev-qt/qtwebchannel webengine Install documentation for dev-qt/qtwebengine websockets Install documentation for dev-qt/qtwebsockets webview Install documentation for dev-qt/qtwebview widgets Install documentation for dev-qt/qtwidgets x11extras Install documentation for dev-qt/qtx11extras xmlpatterns Install documentation for dev-qt/qtxmlpatterns qt3d gamepad Add support for gamepad hardware via dev-qt/qtgamepad qml Build QML/QtQuick bindings vulkan Enable support for Vulkan qtbluetooth qml Build QML/QtQuick bindings and imports qtcharts qml Build QML/QtQuick bindings and imports qtcore old-kernel Disable syscalls not available on Linux kernels older than 4.11 systemd Enable native journald logging support qtdatavis3d qml Build QML/QtQuick bindings and imports qtdeclarative localstorage Build the LocalStorage import for QtQuick (requires QtSql) vulkan Enable support for Vulkan widgets Enable QtWidgets support qtdiag network Report network information widgets Report widget style information qtgamepad evdev Enable support for input devices via evdev qml Build QML bindings qtgui X Build the XCB platform plugin and enable X11 integration egl Enable EGL integration eglfs Build the EGL Full Screen/Single Surface platform plugin evdev Enable support for input devices via evdev ibus Build the IBus input method plugin libinput Enable support for input devices via dev-libs/libinput tslib Enable support for touchscreen devices via x11-libs/tslib tuio Build plugin to receive touch events over the TUIO protocol vulkan Enable support for Vulkan wayland Provide dev-qt/qtwayland to ensure Qt applications can be run as Wayland clients qtmultimedia gstreamer Enable audio support via media-libs/gstreamer qml Build QML/QtQuick bindings and imports widgets Build the QtMultimediaWidgets module qtnetwork bindist Disable EC support via dev-libs/openssl connman Enable net-misc/connman-based bearer plugin gssapi Enable support for GSSAPI (virtual/krb5) libproxy Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration networkmanager Enable net-misc/networkmanager-based bearer plugin qtpositioning geoclue Use enhanced location information from app-misc/geoclue qml Build QML bindings qtquickcontrols widgets Enable QtWidgets support qtquickcontrols2 widgets Enable QtWidgets support qtscript scripttools Build the QtScriptTools module (requires QtWidgets) qtsensors qml Build QML bindings qtvirtualkeyboard handwriting Adds handwriting recognition integration support qtwayland vulkan Enable support for Vulkan-based server buffer integration qtwebchannel qml Build QML/QtQuick bindings and imports qtwebengine designer Install the QWebEngineView plugin used to add widgets in dev-qt/designer forms that display web pages. geolocation Enable physical position determination via dev-qt/qtpositioning jumbo-build Combine source files to speed up build process. system-ffmpeg Use the system-wide media-video/ffmpeg instead of bundled. system-icu Use the system-wide dev-libs/icu instead of bundled. widgets Enable QtWidgets support qtwebkit geolocation Enable physical position determination via dev-qt/qtpositioning gstreamer Enable HTML5 audio/video support via media-libs/gstreamer using SLOT 1.0 hyphen Enable hyphenation support via dev-libs/hyphen multimedia Enable HTML5 audio/video support via dev-qt/qtmultimedia orientation Enable device orientation detection via dev-qt/qtsensors printsupport Enable printing via dev-qt/qtprintsupport qml Build QML/QtQuick bindings qtwebsockets qml Build QML bindings qtwidgets gtk Build the GTK platform theme plugin qtxmlpatterns qml Build the XmlListModel import for QtQuick (requires QtDeclarative) dev-ros rosbag lz4 Add support for lz4 compressed bags. rosconsole glog Use dev-cpp/glog as log backend. log4cxx Use dev-libs/log4cxx as log backend. dev-ruby barby cairo Add support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby. png Add support for writing PNG images using dev-ruby/chunky_png. prawn Add support for writing PDF documents using dev-ruby/prawn. qrcode Add support for QRCode 2D codes using dev-ruby/rqrcode. rmagick Add support for writing images (among others PNG, GIF and JPEG) using dev-ruby/rmagick. Not available on JRuby. faraday_middleware mashify Include FaradayMiddleware::Mashify oauth Include FaradayMiddleware::OAuth parsexml Include FaradayMiddleware::ParseXml rashify Include FaradayMiddleware::Rashify maruku highlight Enable source code highlighting via dev-ruby/syntax mysql2 mariadb Use mariadb bindings net-ssh ed25519 Use dev-ruby/ed25519 for Ed25519 support rails asset-pipeline Also install the default components for the asset pipeline. These are not required but they are activated automatically in new Rails projects by default. rrdtool-bindings graph Enable support for graphing functions rspec-core highlight Enable source code highlighting via dev-ruby/coderay ruby-sdl image Enable media-libs/sdl-image support mixer Enable media-libs/sdl-mixer support sge Enable sdl-sge support rubygems server Install support for the rubygems server vcr json Add support for casettes serialized with JSON dev-scheme gauche mbedtls Enable support for net-libs/mbedtls gauche-gl cg Enable NVidia Cg binding guile debug-freelist Include garbage collector freelist debugging code debug-malloc Include malloc debugging code deprecated Enable deprecated features discouraged (implied by deprecated) enable merely discouraged features networking Include networking interfaces regex Include regular expression interfaces kawa awt Assume AWT is available frontend Build "kawa" front-end program using sys-libs/readline jemacs Build JEmacs krl Build BRL emulation and KRL sax Assume SAX2 is available with dev-java/sax servlets Build support for generating servlets with Java servletapi swing Assume Swing is available xqtests Support XQuery Test Suite racket futures Enable racket/future library for fine-grained hardware parallelism places Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model. threads Enable support for green threads scm arrays Support for arrays, uniform-arrays and uniform-vectors. bignums Support for large precision integers. cautious SCM will always check the number of arguments to interpreted closures. dynamic-linking Be able to load compiled files while running. engineering-notation Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation. gsubr generalized c arguments: for arbitrary (more then 11) arguments to C functions. inexact Support for floating point numbers. ioext Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions. libscm Build and install libscm.a and related headers macro C level support for hygienic and referentially transparent macros (syntax-rules macros). regex String regular expression matching. unix Support for: nice, acct, lstat, readlink, symlink, mknod and sync. slib gambit Support for gambit scheme implementation scm Support for scm scheme implementation dev-tcltk expect-lite debug pull in packages needed for runtime interactive debugger tcl3d ode Enable support for physics engine from dev-games/ode osg Enable support for 3D toolkit from dev-games/openscenegraph tktreectrl shellicon shellicon extension dev-tex abntex lyx Install with app-office/lyx layout biblatex biber Install the unicode compatible backend processor pythontex highlighting Syntax highlighting using dev-python/pygments dev-texlive texlive-basic luajittex Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster. dev-util android-ndk legacy-toolchains Install legacy toolchains target-32 Support for 32-bit targets target-64 Support for 64-bit targets android-studio custom-jdk Install and use Android Studio's custom JRE. anjuta devhelp Enable devhelp integration glade Build glade plugin for anjuta terminal Enable terminal plugin based on x11-libs/vte bazel tools Install extra bazel tools to build from sources bitcoin-tx knots Build enhanced Bitcoin Knots version, rather than Bitcoin Core buildbot docker Add support for worker docker command steps irc Add support for status delivery through an ircbot. bustle interactivetests Build interactive test programs threaded Build with support for multithreaded execution. catalyst ccache Enables ccache support iso Pulls in the depends for building iso images system-bootloader Pulls in the depends needed to setup livecd bootloader from the host system rather than using a cdtar cccc apidoc Build software docs with doxygen/graphviz and metrics with cccc mfc Add patch for MFC dialect options clion custom-jdk Install and use IntelliJ's custom JRE. cmake system-jsoncpp Use system copy of dev-libs/jsoncpp instead of bundled one. codeblocks contrib Build additional contrib components fortran Build FortranProject plugin which enables to use Code::Blocks IDE for Fortran language cppcheck htmlreport install cppcheck-htmlreport ctags json Enable JSON output support xml Enable XML parsing support yaml Enable YAML parsing support cwdiff mercurial install hg wdiff alias for dev-vcs/mercurial devhelp gedit Install plugin for app-editors/gedit dialog minimal Disable library, install command-line program only diffoscope R Use dev-lang/R binutils Use sys-devel/binutils cpio Use app-arch/cpio diff Use sys-apps/diffutils docx Use app-text/docx2txt dtc Use sys-apps/dtc e2fsprogs Use sys-fs/e2fsprogs file Use sys-apps/file find Use sys-apps/findutils gettext Use sys-devel/gettext gpg Use app-crypt/gnupg haskell Use dev-lang/ghc hdf5 Use sci-libs/hdf5 hex Use app-editors/vim-core iso Use virtual/cdrtools llvm Use sys-devel/llvm opendocument Use app-text/odt2txt pascal Use dev-lang/fpc rpm Use app-arch/rpm squashfs Use sys-fs/squashfs-tools ssh Use net-misc/openssh tar Use app-arch/tar tcpdump Use net-analyzer/tcpdump xz Use app-arch/xz-utils zip Use app-arch/unzip edb-debugger jumbo-build Experimental jumbo (also known as unity) build capability edi clang Provide integration with sys-devel/clang for autocompletion and inline errors emilpro system-binutils Use the gentoo binutils instead of building against an unpatched vanilla version flatpak-builder yaml Use libyaml for yaml support geany gtk3 Use GTK+3 instead of GTK+2 vte Enable Terminal support (x11-libs/vte) geany-plugins ctags Enable ctags plugin debugger Enable the debugger plugin which interfaces with sys-devel/gdb enchant Enable spell checking using enchant gpg Enable geanypg plugin which integrates GPG using app-crypt/gpgme gtk3 Use GTK+3 instead of GTK+2 gtkspell Use gtkspell for dictionary support in GeanyVC markdown Enable the markdown plugin pretty-printer Enable pretty-printer plugin scope Enable the scope plugin which is a graphical GDB front-end soup Enable updatechecker and geniuspaste plugins which require net-libs/libsoup workbench Enable workbench plugin glade webkit Build catalog support for net-libs/webkit-gtk:4 widgets. global vim Integrate the GNU GLOBAL source code tag system with Vim gnome-builder clang Provide integration with sys-devel/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support devhelp Provide API docs browsing and integration via dev-util/devhelp git Provide support for the Git version control system via dev-libs/libgit2-glib (such as setup of Git for New Project, direct cloning for Open Project and changed lines indicators in the editor gutter) glade Provide integration with dev-util/glade UI designer for Gtk sysprof Provide an integrated profiler via dev-util/sysprof vala Provide an autoindenter, autocompletion, diagnostics, and symbol resolver for Vala google-perftools debug Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc. largepages Use (experimental) larger pages for tcmalloc, this increases memory usage, but should speed up the allocation/free operations. largepages64k Use (experimental) 64K pages for tcmalloc, this increases memory usage, but should speed up the allocation/free operations. minimal Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers. optimisememory To build libtcmalloc with smaller internal caches. heaptrack gui Install Qt5-based analyzer tool idea-community jbr11 Install and use the Java 11 based version of JetBrains Runtime. jbr8 Install and use the Java 8 based version of JetBrains Runtime. intel-ocl-sdk android Install android related files system-boost Use system boost (dev-libs/boost) instead of bundled one system-tbb Use system Thread Building Blocks (dev-cpp/tbb) instead of bundled one kdevelop gdbui Enable GUI for attaching GDB to a running process hex Enable hex editor plugin via app-editors/okteta qmake Enable support for QMake build system reviewboard Enable reviewboard support webkit Enable deprecated dev-qt/qtwebkit instead of dev-qt/qtwebengine for integrated documentation kernelshark custom-optimization Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS ltrace unwind Use sys-libs/libunwind for frame unwinding support lttng-tools ust Support LTTng-UST (Userspace Tracing) lttng-ust numa Enable numa support massif-visualizer callgraph Enable detailed snapshot analysis using media-gfx/kgraphviewer mdds valgrind Add support for memory debugging using dev-util/valgrind mingw64-runtime idl Install idl files. libraries Build extra libraries: mangle, pseh, winpthreads. tools Build extra tools: gendef, genidl. nemiver memoryview Enable the optional hexadecimal memory inspection with app-editors/ghex nvidia-cuda-sdk cuda Build CUDA binaries opencl Build OpenCL binaries nvidia-cuda-toolkit debugger Install the CUDA debugger eclipse Install Eclipse plugins nsight Install profiling and optimizing tools (nsight-compute, nsight-systems) profiler Install the NVIDIA CUDA profiler (nvprof) and the related libraries sanitizer Install compute-sanitiazer tool vis-profiler Install the NVIDIA CUDA visual profiler (nvvp) oprofile apidoc Provide doxygen generated API docs. ostree archive Use libarchive dracut Install dracut module gpg Enable GPG support grub Enable grub configuration generator http2 Use http2 httpd Enable ostree trivial-httpd entrypoint libmount Use libmount sodium Use libsodium for ed25519 soup Use libsoup for networking perf clang Enable builtin clang and LLVM support demangle Enable C++ symbol name demangling, using libbfd from sys-devel/binutils. When this flag is enabled, the package will have to be rebuilt after every version bump of binutils. doc Build documentation and man pages. With this USE flag disabled, the --help parameter for perf and its sub-tools will not be available. This is optional because it depends on a few documentation handling tools that are not always welcome on user systems. numa Enable NUMA support perl Add support for Perl as a scripting language for perf tools. systemtap Add support to define SDT event in perf tools. unwind Use sys-libs/libunwind for frame unwinding support. pkgconf pkg-config Install as a replacement for dev-util/pkgconfig pkgconfig internal-glib Use internal copy of dev-libs/glib pycharm-community bundled-jdk Use bundled jdk pycharm-professional bundled-jdk Use bundled jdk scanmem gui Enable the GameConqueror GUI sccache azure Enable Azure Blob Storage support dist-client Enables distributed support in the sccache client dist-server Enables the sccache-dist binary gcs Enable Google Cloud Storage support redis Enable Redis support s3 Enable Amazon S3 support schroot btrfs Enable support for chroots using btrfs snapshots dchroot Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot lvm Enable support for chroots using LVM snapshots zfs Enable support for chroots using ZFS shapshots/clones spirv-llvm-translator tools Install the command-line translator llvm-spirv strace aio Enable dev-libs/libaio support for tracing Asynchronous I/O operations elfutils Enable stack backtraces (-k flag) via dev-libs/elfutils unwind Enable stack backtraces (-k flag) via sys-libs/libunwind sysdig modules Build kernel modules needed for tracing local events. Disable this only if you intend to use sysdig purely to work with dumpfiles. sysprof unwind Use sys-libs/libunwind to unwind the stack systemtap libvirt Support probing of libvirt domains. trace-cmd udis86 Enable support for dev-libs/udis86 disassembler library uftrace capstone Use capstone to provide dynamic tracing without recompilation vulkan-tools cube Build the cube/cubepp demos dev-vcs cssc valgrind Enable usage of dev-util/valgrind in tests cvs server Enable server support cvsync gcrypt Use dev-libs/libgcrypt for hash functions. mhash Use app-crypt/mhash for hash functions. openssl Use dev-libs/openssl for hash functions. darcs terminfo Use the terminfo package for enhanced console support. threaded Use threading and SMP support. fossil fusefs Enable the Fuse Filesystem json Enable the JSON API of Fossil's wiki miniz Use the bundled miniz for compression instead of zlib. Incompatible with ssl. system-sqlite Use the system SQLite instead of the bundled one tcl-private-stubs Enable Tcl integration via private stubs mechanism tcl-stubs Enable Tcl integration via stubs library mechanism th1-docs Enable TH1 for embedded documentation pages th1-hooks Enable TH1 hooks for commands and web pages git blksha1 Use the new optimized SHA1 implementation cgi Install gitweb too curl Support fetching and pushing (requires webdav too) over http:// and https:// protocols gpg Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime! highlight GitWeb support for app-text/highlight mediawiki Support pulling and pushing from MediaWiki mediawiki-experimental Add experimental patches for improved MediaWiki support pcre-jit Enable JIT for pcre perforce Add support for Perforce version control system (requires manual installation of Perforce client) ppcsha1 Make use of a bundled routine that is optimized for the PPC arch subversion Include git-svn for dev-vcs/subversion support tk Include the 'gitk' and 'git gui' tools webdav Adds support for push'ing to HTTP/HTTPS repositories via DAV git-annex assistant Enable git-annex assistant and watch command benchmark Enable benchmarking dbus Enable dbus support debuglocks Debug location of MVar/STM deadlocks gitlfs Build with git-lfs library (rather than vendored copy) httpclientrestricted Build with http-client-restricted library (rather than vendored copy) magicmime Use libmagic to determine file MIME types networkbsd Build with network-3.0 which split out network-bsd pairing Enable pairing s3 Enable S3 support torrentparser Use haskell torrent library to parse torrent files webapp Enable git-annex webapp webdav Enable WebDAV support gitg glade Install a glade catalog file python Install Python bindings for those plugins requiring it. gitolite contrib Install user-contributed files tools Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible gitolite-gentoo contrib Install user-contributed files tools Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible kdesvn man Build and install man pages mercurial chg Support Mercurial command server client gpg Support signing with GnuPG. tk Install dev-lang/tk for hgk script. subversion extras Install extra scripts (examples, tools, hooks) kwallet Enable encrypted storage of passwords with kde-frameworks/kwallet games-action beathazardultra bundled-libs Use the upstream provided bundled libraries. chromium-bsu mixer Enables media-libs/sdl-mixer sound backend instead of media-libs/openal one. descent1-freedata l10n_de Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign opl3-musicpack Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip sc55-musicpack Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module textures Include high resolution (640x480) backgrounds, briefing images and fonts (Descent 1) descent2-freedata l10n_de Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign opl3-musicpack Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip sc55-musicpack Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module dxx-rebirth d1x Install Descent 1 resources and executable d2x Install Descent 2 resources and executable data Ensure some game levels are present; if the full game's level data is not already installed then install the playable demo data (i.e. shareware levels) debug Enable various debugging code paths and sanity checks, not just output. Some of these checks date back to the retail build, and choke on some custom levels because the game was never coded to sufficiently distrust inputs editor Enable level editor support l10n_de Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign midi Enforce that SDL-mixer is used and has midi support music Enable music support opl3-musicpack Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip sc55-musicpack Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module sdl2 Use libSDL2, SDL2-mixer instead of libSDL-1* and SDL-mixer-1* tracker Enable support for the PHP-based multiplayer game tracker valgrind Include a Valgrind header in build in order to support Memcheck client requests hotline-miami bundled-libs Use bundled libraries. launcher Install qt launcher minetest client Build Minetest client leveldb Enable LevelDB backend prometheus Enable prometheus client support redis Enable redis backend via dev-libs/hiredis server Build Minetest server spatial Enable SpatialIndex AreaStore backend solar2 bundled-libs Use the upstream provided bundled libraries. supermariowar server Compile and install Super Mario War server files supertuxkart nettle Use dev-libs/nettle crypto backend recorder Enable recording with media-libs/libopenglrecorder sqlite Record IP bans, statistics in server mode with dev-db/sqlite wiimote Support for wiimote input devices swordandsworcery bundled-libs Use the upstream provided bundled libraries. trine launcher Install GTK+ launcher trine-enchanted-edition launcher Install GTK+ launcher trine2 launcher Install GTK+ launcher games-arcade bomns editor enables building the level editor burgerspace network Enable client-server support commandergenius downloader Allows some Keen games to be downloaded from the menu jazz2 gles2-only Use GLES 2.0 or later instead of full OpenGL 2.1 server Build the multiplayer game server jazz2-data cc Install The Christmas Chronicles additional data demo Use the free demo data instead of the full retail game data gles2-only Use GLES 2.0 or later instead of full OpenGL 2.1 jumpnbump music Enable playing of background music lbreakout2 themes Install additional themes moleinvasion music Download and install the music files oshu osu-skin Include more complete osu-skin (other is minimal) performous midi Enable MIDI I/O support songs Install a few demo songs tools Enable building of song extraction utilities for SingStar and Guitar Hero webcam Enable Webcam support savagewheels fmod Enable the fmod music and sound effects library tuxanci physfs Use dev-games/physfs instead of dev-libs/libzip to load compressed data games-board cockatrice client Build with client oracle Build with oracle server Compile server support crafty no-opts Don't try to enable crazy CFLAG options freedoko backgrounds Install additional background images gnomecards Install the gnome-games card set kdecards Install the KDE card set net Enable network game support openclipartcards Install the openclipartcards card set pysolcards Install the PySol card set xskatcards Install the XSkat card set pasang-emas extras Install some extra themes pioneers help Enable gnome ingame help via scrollkeeper pysolfc extra-cardsets Install extra cardsets sound Enable sound support using dev-python/pygame spider athena Enable athena widgets stockfish general-32 Generic unoptimized 32-bits build general-64 Generic unoptimized 64-bits build optimize Enable upstream -O3 optimizations (default enabled) tablebase-syzygy 6-pieces Install tablebases for 6 pieces (huge!) xboard default-font Install the default font that xboard uses zippy Enable experimental zippy client games-emulation dolphin discord-presence Enables Discord Rich Presence, show the current game on Discord evdev Enable evdev input support log Increase logging output lto Add support for link-time optimizations. dosbox core-inline Enable memory-increasing inlines for better performance but requiring more build time glide Enable unofficial Glide emulation via media-libs/openglide dosbox-staging dynrec Use recompiling cpu core instead of dynamic x86/x64 specific cpu core network Enable networking features (modem, ipx) opus Support compressed audio tracks (.opus) used with CDROM images fceux logo Enable the ability to add a logo screen when creating AVIs generator sdlaudio Enable SDL Audio hatari capsimage Use dev-libs/spsdeclib to read .IPF, .RAW, and .CTR disk images microphone Use media-libs/portaudio for Falcon microphone handling portmidi Use media-libs/portmidi as an alternative MIDI backend sdl2 Use libsdl2 instead of libsdl higan icarus Build icarus library manager udev Enable udev based input m64py 7z Ensure support for .7z archives. rar Ensure support for .rar archives. mednafen debugger Build with internal debugger mgba discord Enable Discord RPC support elf Enable the use of elf utils via dev-libs/elfutils gles2 Build OpenGL ES 2.x RenderSystem gles3 Build OpenGL ES 3.x RenderSystem mupen64plus audio-sdl Enable SDL audio plugin. input-sdl Enable SDL input plugin. rsp-hle Enable HLE RSP plugin. ui-console Enable default console UI. ui-m64py Enable PyQt5 UI using games-emulation/m64py. video-glide64mk2 Enable Glide64mk2 video plugin. video-rice Enable Rice video plugin. mupen64plus-core debugger Build the debugger new-dynarec Enable new experimental dynamic recompiler implementation (only for x86 and arm) opencv Support video capture via media-libs/opencv osd Overlay emulator messages using on-screen-display mupen64plus-video-glide64mk2 hires Support hi-resolution textures (requires dev-libs/boost) pcsxr archive Support compressed files (via libarchive) ccdda Support compressed CDDA (requires ffmpeg) cdio Use libcdio for CD support sdl Use SDL sound backend (other parts of SDL are used unconditionally) ppsspp headless Build headless version of the PPSSPP system-ffmpeg Use the system-wide media-video/ffmpeg instead of bundled snes9x libretro Build libretro port netplay Enable playing ROMs over the network (not recommended) vbam link Enable GBA linking functionality zsnes debug Enable the builtin debugger games-engines devilutionx lto Build with link time optimization enabled exult sdl2 Use libsdl2 instead of libsdl frobtads tads2compiler Build TADS2 compiler tads3compiler Build TADS3 compiler odamex client Build client target master Build master server target (advertises odamex server list) odalaunch Build the wxWidgets based launcher portmidi Enable PortMidi support server Build server target openmw devtools Install development tools like bsatool, esmtool and opencs. osg-fork Use OpenSceneGraph forked by OpenMW instead of upstream OSG. renpy development Install IDE for game developers and an empty game template residualvm mpeg2 enable mpeg2 codec for cutscenes scummvm fluidsynth compile with support for fluidsynth fribidi Support for right-to-left languages via dev-libs/fribidi mpeg2 enable mpeg2 codec for cutscenes net enable cloud support via media-libs/sdl2-net speech enable text-to-speech support through app-accessibility/speech-dispatcher unsupported enable unsupported and/or broken game engines (you're on your own) solarus doc Install doxygen developer documentation. stratagus fluidsynth compile with support for fluidsynth games-fps alienarena vidmode Link against x11-libs/libXxf86vm. Required for full-screen support. chocolate-doom midi basic support for MIDI files darkplaces cdsound Enables using CD audio in the engine demo Uses the demo data from quake1 (quake1-demodata) lights Install and setup the updated light maps textures Install and setup the updated textures doomsday demo Install launcher dor doom1.wad from games-fps/doom-data fluidsynth Build the FluidSynth sound driver fmod Enable support for fmod music and sound effects lib freedoom Install launcher for doom1.wad from games-fps/freedoom tools Build additional tools such as doomsday-shell, md2tool and texc duke3d-data gog Extract the data from the GOG.com installer. eduke32 demo Install the Duke Nukem 3D demo files, provided by games-fps/duke3d-demodata. fluidsynth Install media-libs/sdl2-mixer with fluidsynth support. hrp Install the Duke Nukem 3D High Resolution Pack. offensive Install the Duke Nukem 3D XXX Pack. opl Install the Duke Nukem 3D OPL music files. psx Install the Duke Nukem 3D PSX high resolution voice files. sc-55 Install the Duke Nukem 3D Roland SC-55 music files. sdk Install the SDK files. server Enable support for multiplayer. tools Install the support tools for mapster32. voxels Install the Duke Nukem 3D Voxels Pack. vpx Enable support for media-libs/libvpx. xmp Enable support for media-libs/exempi. gzdoom fluidsynth Enable support for MIDI via media-sound/fluidsynth gtk2 Enable support for GTK+2 instead of GTK+3 mpg123 Enable support for MPEG audio playback via media-sound/mpg123 non-free Enable non-free components nexuiz maps Install the community map pack prboom-plus dumb Enable support for various tracker-style music formats via media-libs/dumb fluidsynth Enable support for MIDI via media-sound/fluidsynth net Enable support for network play portmidi Enable support for MIDI via media-libs/portmidi sdl2-image Enable support for high-resolution texture support via media-libs/sdl2-image sdl2-mixer Enable support for MIDI via media-libs/sdl2-mixer server Build PrBoom-Plus server quake2-icculus demo Install the demo files (quake2-demodata) and configure for use qmax Build the pretty version (quake max) rogue Build support for the 'Ground Zero' Mission Pack (rogue) xatrix Build support for the 'The Reckoning' Mission Pack (xatrix) quakeforge wildmidi enable libWildMidi support xdg enable XDG support qudos demo Install the demo files (quake2-demodata) and configure for use mods Build support for the quake2 mission packs qmax Build the pretty version (quake max) textures Install the enhanced textures (quake2-textures) redeclipse dedicated Install only as a dedicated game server rott demo Install the shareware version sauerbraten server Compile server support turtlearena mumble Adds player-location (positional audio) support to VoIP server Build server target voice Adds VoIP support urbanterror altgamma Alternative way for gamma setting with modesetting driver client Build binary for client (includes code for non-dedicated server) mumble Use Mumble for ingame VoIP (experimental) server Build binary for dedicated server skeetshootmod Build support for skeetshoot mod for specific maps voip Use ioq3 ingame VoIP (experimental) worldofpadman maps Install extra maps (PadPack) xonotic ode Enable support for physics engine from dev-games/ode yamagi-quake2 client Build client ctf Build support for the 'Capture The Flag' addon rogue Build support for the 'Ground Zero' Mission Pack softrender Build software renderer xatrix Build support for the 'The Reckoning' Mission Pack games-kids gcompris kiosk Enable kiosk mode by default (for use by small children or on a self-service host machine) tuxtype pango Render fonts using media-libs/sdl-pango instead of media-libs/sdl-ttf games-misc little-inferno bundled-libs Use bundled libraries. ponysay fish-completion Enable fish completion support non-free Install non-free ponies (i.e. from the MLP franchise) xcowsay fortune Enable support for fortune cookies via games-misc/fortune-mod games-mud tf atcp enable ATCP support. gmcp enable GMCP support. option102 enable telnet option 102 support. games-puzzle cuyo music Enable playing of background music gnome-tetravex cli Build the gnome-tetravex-cli command-line interface gui Build the gnome-tetravex graphical Gtk user interface nightsky bundled-libs Use the upstream provided bundled libraries. numptyphysics user-levels Install some fun user-created levels pingus music Enable playing of background music sgt-puzzles gtk3 Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2 tiny-and-big bundled-libs Use the upstream provided bundled libraries. world-of-goo-gog bundled-libs Use bundled libs world-of-goo-hb bundled-libs Use bundled libs xlogical alt_gfx Use alternate graphics which are closer to the original Amiga version games-roguelike FTL bundled-libs Use bundled libraries. angband sound Enable and install sounds stone-soup ncurses Enable for console (uses ncurses) based build. (can be enabled on top of tiles) tiles Enable for graphical (tiled) build. (can be enabled on top of ncurses) tomenet server Compile server support games-rpg daimonin-client music Install extra music drascula sound Install optional audio files dreamweb doc High-resolution scans of the written material in the original UK game box dungeon-defenders bundled-libs Use the upstream provided bundled libraries. freedroidrpg devtools Compile the additional dev tools profile Enable the integration of the ingame real-time profiler sanitize Compile with address sanitizer hatoful-boyfriend gui Install the GUI for configuring screen resolution and input hatoful-boyfriend-holiday-star gui Install the GUI for configuring screen resolution and input kqlives cheats Enable cheating mode manaplus mumble Enable support for voice chat pugixml Use dev-libs/pugixml for XML parsing isntead of dev-libs/libxml2 sdl2 Use libsdl2 instead of libsdl sumwars tools Builds editor tools to-the-moon bundled-libs Use bundled libraries games-simulation corsix-th midi Adds support for background MIDI music via SDL_mixer flightgear dbus Enable screensaver DBus interaction gdal Enable alternative terrain engine based on pagedLOD using sci-libs/gdal qt5 Build Qt5 launcher application udev Enable event-based Input devices through virtual/udev utils Build various utilities (fgpanel, fgviewer among others) openrct2 lightfx Enables LightFX for better lightning effects. scripting Enable the dev-lang/duktape scripting engine for executing user scripts. openttd aplaymidi Enables midi music in game, using aplaymidi as an external player dedicated Build only the openttd server, and not the client. lzo Enables LZO compression for savegames. This is only needed to load extremely old savegames. (versions before 0.2) openmedia Enables the free open media sets: OpenGFX, OpenSFX, OpenMSX, removing the requirement for proprietary TTD assets to play OpenTTD. train-valley gui Install the GUI for configuring screen resolution and input games-sports speed-dreams xrandr Enable support for the X xrandr extension xmoto double-precision more precise calculations at the expense of speed games-strategy 0ad editor Include Atlas scenario editor projects lobby Enable the use of net-libs/gloox and the multiplayer lobby nvtt Support for some uncompressed data formats via media-gfx/nvidia-texture-tools (might be needed for some mods) colobot devbuild TODO tools Build tools colobot-data music Enable music support defcon-demo system-libs Use system libraries instead of the ones included in the upstream distribution. freeciv aimodules Support for dynamically loadable AI modules (server-side) auth Add authentication capability via mysql, postgres or sqlite3 mapimg Additional mag image toolkit via media-gfx/imagemagick modpack Build the freeciv-modpack-program to download/install mods server Enable server support. Disabling this will also make it impossible to start local games. sound Add support for sound provided by media-libs/sdl-mixer system-lua Use dev-lang/lua instead of the bundled liblua freesynd devtools Build development tools hedgewars server Enable local server ja2-stracciatella editor Adds necessary file to run the editor ru-gold Support for russian gold ja2 version megaglest editor Build map editor fribidi Enable FriBIDi support model-viewer Build model viewer streflop Use the library streflop. Out of synchs may occur if not enabled. tools Build model import/export tools unicode Use unicode strings for wxwidgets wxuniversal Use the wxUniversal port which implements the various GUI controls by drawing them itself naev mixer Enables media-libs/sdl-mixer sound backend in addition to media-libs/openal one. satellite-reign gui Install the GUI for configuring screen resolution and input ufoai client Build the main game client server Build the dedicated server uqm music download and install music files (large) remix download and install music remix files (large) voice download and install voice files (large) wesnoth fribidi Support for right-to-left languages server Enable compilation of server games-util deutex man Build and install man pages gslist web Enable the web interface lgogdownloader gui Enable GUI login support for passing reCAPTCHA slade fluidsynth Enable MIDI software synthesis using media-sound/fluidsynth wit fuse Enable image mount support via fuse gnome-base gconf ldap Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry." gdm bluetooth-sound Allow loading of bluetooth sound modules. This may be necessary for accessibility screen readers, but may cause bluetooth sound issues for users logging in. elogind Use sys-auth/elogind for session management fprint Enables experimental fingerprint authentication using sys-auth/fprintd plymouth Enable support for smooth transition from sys-boot/plymouth gnome classic Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode extras Install additional GNOME applications gnome-applets tracker Build the tracker search bar applet gnome-control-center flickr Add support for using photos from flickr as desktop background gnome-online-accounts Enable configuration panel for net-libs/gnome-online-accounts accounts ibus Enable support for enhanced input methods through app-i18n/ibus gnome-extra-apps games Install Gnome Games share Install the gnome-extra/gnome-user-share personal file sharing tool shotwell Install the media-gfx/shotwell photo manager tracker Install the app-misc/tracker indexer and the GNOME packages that require it gnome-keyring ssh-agent Use GNOME Keyring to unlock SSH keys. Recommended unless you are using ECDSA or Ed25519 keys. gnome-light gnome-shell Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode gnome-session elogind Support sys-auth/elogind for session tracking gnome-settings-daemon elogind Rely on sys-auth/elogind as runtime logind provider modemmanager Enable WWAN support via net-misc/modemmanager systemd Rely on sys-apps/systemd as runtime logind provider gnome-shell browser-extension Ensure the presence of extensions.gnome.org native connector gnome-extra/chrome-gnome-shell elogind Use sys-auth/elogind for session tracking and suspend support. ibus Enable support for enhanced input methods through app-i18n/ibus telepathy Ensure presence of telepathy chat integration gvfs afp Enables support for accessing AFP (Apple Filing Protocol) network shares archive Enables support for accessing files in archives transparently via app-arch/libarchive bluray Enable playback of Blu-ray filesystems using media-libs/libbluray elogind Use sys-auth/elogind for session tracking. fuse Enables fuse mount points in $HOME/.gvfs for legacy application access gnome-online-accounts Enable configuration panel for net-libs/gnome-online-accounts accounts google Enables support for accessing Google accounts via dev-libs/libgdata http Enable the HTTP/DAV backend using net-libs/libsoup nfs Enable NFS client support via net-fs/libnfs. udev Enable udev base replacement code for cdda feature libgnomecanvas glade Enable glade support librsvg tools Build svg viewer tool nautilus gstreamer Enable the Audio/Video file properties page previewer Use gnome-extra/sushi to preview files from the file mananger sendto Enable the nautilus-sendto extension to send files to various locations/devices orbit pic Force libname-server-2 to be built as PIC; needed on hardened systems gnome-extra cinnamon-control-center modemmanager Enable support for mobile broadband devices using net-misc/modemmanager cinnamon-session elogind Rely on sys-auth/elogind as runtime logind provider eiciel nautilus Build gnome-base/nautilus extension evolution-data-server berkdb sys-libs/db support needed to migrate old (pre-3.13 evolution versions) addressbook data gnome-online-accounts Enable net-libs/gnome-online-accounts based Google authentication support oauth Enable internal OAuth2 authentication support for Google and Outlook.com. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime weather Enable optional weather calendar support filemanager-actions caja Install the mate-base/caja extension nautilus Install the gnome-base/nautilus extension nemo Install the gnome-extra/nemo extension gnome-color-manager packagekit Enable support for the distro-neutral package manager GUI PackageKit gnome-commander chm Enable metadata support for Microsoft Compiled HTML Help files gsf Add metadata support for OLE, OLE2 and ODF pdf Add metadata support for PDF taglib Add metadata support for ID3, Vorbis, FLAC and APE unique Enable single instance support using dev-libs/libunique gnome-contacts telepathy Start chat from contact details gnome-shell-extension-gsconnect nautilus Install Nautilus extension for sending files via GSConnect gnome-software firmware Enable firmware update support through sys-apps/fwupd packagekit Enable module for package manager integration gnome-system-monitor systemd Display sys-apps/systemd metadata, e.g. unit names, for running processes libgda canvas Enable support for x11-libs/goocanvas http Enable embedded net-libs/libsoup based server json Enable support for JSON format mdb Enable support for Microsoft Access database using app-office/mdbtools sourceview Enable support for x11-libs/gtksourceview libgsf gtk Enable use of gdk in thumbnailer nemo tracker Add support for app-misc/tracker search nm-applet gcr Enable advanced certificate chooser, requires app-crypt/gcr modemmanager Enable support for mobile broadband devices using net-misc/modemmanager teamd Enable teamd configuration editor sushi office Support viewing file formats such as generated by app-office/libreoffice synapse plugins Build support for plugins using net-libs/rest gnustep-apps gemas projectcenter Build and install plugin for gnustep-apps/projectcenter gworkspace gwmetadata Enable the metadata indexing and searching system sogo activesync Build the ActiveSync support code gnustep-base gnustep-back-art xim Enable X11 XiM input method gnustep-back-cairo xim Enable X11 XiM input method gnustep-back-xlib xim Enable X11 XiM input method gnustep-gui speech Audio support using app-accessibility/flite gnustep-make libobjc2 Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and sys-devel/clang compiler native-exceptions Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it libobjc2 boehm-gc Enable Hans Boehm's garbage collector (dev-libs/boehm-gc). Not recommended by upstream gui-apps grim jpeg Enable JPEG support. man Generate and install man pages. gtkgreet layershell Enable layer shell support man Build and install man pages kanshi man build and install man pages lavalauncher man Build and install man pages mako icons Enable support for icons slurp man Generate and install man pages. swaybg man Build and install man pages swayidle elogind Enable support for rootless session via elogind fish-completion Enable fish completion support man Build and install man pages swaylock fish-completion Enable fish completion support gdk-pixbuf Enable additional image format support via the x11-libs/gdk-pixbuf library man Build and install man pages waybar mpd Enable support for the Music Player Daemon network Enable libnl support for network related features popups Enable popup support with gtk-layer-shell pulseaudio Enable support for volume control via PulseAudio tray Enable support for tray wf-recorder man Build and install man pages opencl Enable OpenCL gui-libs greetd man Build and install man pages libhandy glade Install module and catalog for dev-util/glade wlroots X Enable support for X11 applications (XWayland) elogind Enable support for rootless session via elogind icccm Use xcb-icccm (from x11-libs/xcb-util-wm) util library for improved Xwayland introspection x11-backend Enable support for handling input/output devices through x11-libs/libxcb xdg-desktop-portal-wlr elogind Enable support for rootless session via elogind gui-wm hikari gamma add gamma control for redshift layershell add support for wayland apps using layer shell screencopy add support for screen grabbing virtual-io enable virtual input/output support, needed for remote I/O in VNC sway X Enable support for X11 applications (XWayland) elogind Enable support for rootless session via elogind fish-completion Enable fish completion support man Build and install man pages swaybar Install 'swaybar': sway's status bar component swaybg Install 'swaybg': allows to set a desktop background image swayidle Install 'swayidle': idle manager to run commands when user is inactive swaylock Install 'swaylock': sway's screen locker swaymsg Install 'swaymsg': tool for communicating with a running sway instance swaynag Install 'swaynag': shows a message with buttons tray Enable support for StatusNotifierItem tray specification wallpapers Install sway's default wallpaper image wayfire gles use libglvnd to do animations more efficiently system-wfconfig use the system-wide wf-config, else build it as a submodule. DO NOT DISABLE UNLESS YOU KNOW WHAT YOU ARE DOING. system-wlroots use the system wide wlroots, else build it as a submodule. DO NOT DISABLE UNLESS YOU KNOW WHAT YOU ARE DOING. kde-apps akonadi designer Install plugin for dev-qt/designer kaccounts Enable support for system-wide defined KAccounts tools Install tools for developers and testing analitza eigen Enable dev-cpp/eigen mathematical templates support ark zip Enable ZIP archive support via dev-libs/libzip cantor R Enable dev-lang/R backend support analitza Enable kde-apps/analitza backend support julia Enable dev-lang/julia backend support qalculate Enable sci-libs/libqalculate backend support dolphin activities Track which folders are frequently accessed on a Plasma desktop gwenview activities Enable kactivities support fits Enable support for NASA's sci-libs/cfitsio library kipi Enable support for the KDE Image Plugin Interface mpris Enable support for MPRIS2 interface, requiring dev-qt/qtdbus as dependency. share Enable support for a share menu using kde-frameworks/purpose kalzium editor Enable the embedded molecule editor/viewer solver Enable the equation solver kanagram speech Enable text-to-speech support kate activities Enable Plasma Activities support via kde-frameworks/kactivities filebrowser Enable File System browser tool view lspclient Enable LSP (Language Server Protocol) client plugin plasma Enable Session Applet addon for KDE Plasma projects Enable Project plugin for executing queries on SQL DBs snippets Enable Snippets Tool View plugin to manage or download code snippets sql Enable SQL plugin for executing queries on SQL DBs kde-apps-meta pim Pull in KDE PIM suite sdk Pull in developer-specific meta-packages kdeadmin-meta cron Installs KDE application for virtual/cron configuration kdecore-meta share Install kde-frameworks/purpose for share file context menu actions in kde-apps/dolphin thumbnail Install kde-apps/ffmpegthumbs and kde-apps/thumbnailers for thumbnail generation in kde-apps/dolphin webengine Enable www-client/falkon which depends on dev-qt/qtwebengine kdeedu-meta webengine Enable kde-apps/kalzium and kde-apps/parley, requiring dev-qt/qtwebengine kdegraphics-mobipocket thumbnail Enables thumbnail generation kdemultimedia-meta cdrom Include packages for optical discs kdenetwork-meta dropbox Enable support for Dropbox in kde-apps/dolphin via kde-apps/dolphin-plugins-dropbox webengine Enable support for Plasma Telepathy (instant messaging) integration via kde-apps/plasma-telepathy-meta kdenlive freesound Enable freesound.org credentials support via dev-qt/qtwebkit to download files share Enable support for a share menu using kde-frameworks/purpose kdepim-addons importwizard Enable additional import plugins for kde-apps/akonadi-import-wizard markdown Enable Markdown support via app-text/discount kdepim-meta bogofilter Install mail-filter/bogofilter for spam filter support in kde-apps/kmail clamav Install app-antivirus/clamav for virus detection support in kde-apps/kmail spamassassin Install mail-filter/spamassassin for spam filter support in kde-apps/kmail kdesdk-meta git Enable support for Git VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-git mercurial Enable support for Mercurial VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-mercurial subversion Enable support for Apache Subversion VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-subversion kdeutils-meta 7zip Install app-arch/p7zip for 7zip archive support in kde-apps/ark floppy Install kde-apps/kfloppy to format and create DOS or ext2fs filesystems in a floppy. gpg Install kde-apps/kgpg which depends on kde-apps/akonadi lrz Install app-arch/lrzip for LRZ archive support in kde-apps/ark rar Install one of app-arch/rar, app-arch/unrar or app-arch/unar for RAR archive support in kde-apps/ark webengine Enable kde-apps/kimagemapeditor, requiring dev-qt/qtwebengine keditbookmarks man Build and install man pages kget bittorrent Enable bittorrent transfer plugin through net-libs/libktorrent gpg Enable signature verification by GpgME++ via app-crypt/gpgme mms Enable MMS (Microsoft Media Server) plugin through media-libs/libmms kig geogebra Support files created by sci-mathematics/geogebra-bin scripting Support Python scripting kio-extras X Enable support for XCursor thumbnails via x11-libs/libX11 activities Enable activities kioslave and fileitem plugin man Enable manpages kioslave nfs Enable NFS support using net-libs/libtirpc phonon Enable file audio preview plugin using media-libs/phonon sftp Enable SFTP protocol support using net-libs/libssh taglib Enable audio thumbnails via media-libs/taglib kipi-plugins flashexport Build the flash export plugin mediawiki Build the mediawiki export plugin remotestorage Build plugin for remote storage using network protocols such as FTP, SSH, SAMBA via kde-frameworks/kio vkontakte Build plugin for vkontakte.ru kitinerary barcode Enable support for PDF417 and Aztec barcode decoding using media-libs/zxing-cpp kmag keyboardfocus Enable keyboard focus tracking knights speech Enable text-to-speech support konqueror activities Enable kactivities support speech Build text-to-speech plugin kopete addbookmarks Automatically add incoming urls to bookmarks. autoreplace Automatically replace selected text contactnotes Enables writing personal notes for contacts. gadu Enable the Gadu protocol handler. groupwise Enable the Groupwise protocol handler. highlight Allows you to specify highlights on specific events. history Enables saving chat history. latex Embed latex formatted text into messages. meanwhile Enable the Sametime protocol handler. nowlistening Shows song you currently listen to in your status/etc. Bindings for many players. oscar Enable Oscar (AIM/ICQ) IM protocol support otr Allows crypting your chat (drugs and talking nonsense are considered as good alternatives ;]). pipes Send messages to external pipe. privacy Filter for incoming messages statistics Everybody loves statistic graphs, especially cake ones. ;] testbed Enable the testbed protocol. texteffect Various fancy text effects for your messages (don't ever consider writing us with this enabled ;]). translator Translate incoming and outgoing messages. urlpicpreview Enables in conversation pictures preview. webpresence Show your status and some more information on web. winpopup Enable pop-up messages sending on windows. (same as good old "net send" messages ;]) zeroconf Enable Link-Local Messaging via the bonjour protocol. kpimtextedit designer Build plugins for dev-qt/designer ksystemlog kdesu Run as root using kdesu from kde-plasma/kde-cli-tools ktp-accounts-kcm experimental Enables disabled telepathy services (currently only steam) ktp-common-internals otr Enable support for encrypted conversations using Off-The-Records messaging sso Enable support for Single sign-on through KAccounts ktp-text-ui speech Enable incoming messages to be read out using text-to-speech kwave qtmedia Enable playback via Qt5Multimedia kwrite activities Enable Plasma Activities support via kde-frameworks/kactivities libkdepim designer Build plugins for dev-qt/designer libkleo fancyviewer Use kde-apps/kpimtextedit for an improved audit log viewer libksane kwallet Enable encrypted storage of passwords with kde-frameworks/kwallet mailcommon designer Build plugins for dev-qt/designer marble aprs Enable support for APRS data sources designer Install plugin for dev-qt/designer geolocation Enable position information via dev-qt/qtpositioning phonon Enable sound support via media-libs/phonon shapefile Enable support for ESRI shapefiles webengine Use dev-qt/qtwebengine for embedded web browser okular chm Enable support for Microsoft Compiled HTML Help files epub Enable E-Book support via app-text/ebook-tools image-backend Enable image viewing support markdown Enable Markdown support via app-text/discount mobi Enable mobipocket support mobile Enable Plasma mobile support plucker Enable Plucker E-Book for Palm OS devices support qml Install Okular Qml components share Enable support for a share menu using kde-frameworks/purpose speech Enable text-to-speech support pimcommon designer Build plugins for dev-qt/designer spectacle kipi Enable support for the KDE Image Plugin Interface share Enable support for a share menu using kde-frameworks/purpose step qalculate Enable the libqalculate library for unit conversion umbrello php Enable PHP import support using dev-util/kdevelop and dev-util/kdevelop-pg-qt yakuake absolute-position Use kde-frameworks/kwayland for absolute window positioning in KWin kde-frameworks kcompletion designer Build plugins for dev-qt/designer kconfigwidgets designer Build plugins for dev-qt/designer man Build and install man pages kded man Build and install man pages kdewebkit designer Build plugins for dev-qt/designer kfilemetadata epub Enable support for reading EPUB ebook metadata office Enable support for reading ODF and OOXML metadata kiconthemes designer Build plugins for dev-qt/designer kimageformats eps Support the EPS graphics file format kinit caps Capabilities support for improved security and better OOM handling man Build and install man pages kio designer Build plugins for dev-qt/designer kwallet Enable permanent storage of passwords for kpasswdserver with kde-frameworks/kwallet kitemmodels qml Enable QML support via dev-qt/qtdeclarative kitemviews designer Build plugins for dev-qt/designer knotifications phonon Play notification sounds via media-libs/phonon instead of media-libs/libcanberra speech Enable text-to-speech notification support knotifyconfig phonon Add sound support via media-libs/phonon kpackage man Build and install man pages kplotting designer Build plugins for dev-qt/designer kservice man Build and install man pages ktexteditor editorconfig Enable support for EditorConfig configuration files ktextwidgets designer Build plugins for dev-qt/designer speech Enable text-to-speech support kwallet gpg Support wallets with GnuPG encryption in addition to the default blowfish-encrypted file man Build and install man pages kwidgetsaddons designer Build plugins for dev-qt/designer kxmlgui designer Build plugins for dev-qt/designer networkmanager-qt teamd Enable Teamd control support prison qml Enable QML/QtQuick support via dev-qt/qtdeclarative purpose dolphin Enable support for sharing files from kde-apps/dolphin kaccounts Enable support for system-wide defined KAccounts sonnet aspell Enable the app-text/aspell spell-checking backend designer Build plugins for dev-qt/designer hunspell Enable the app-text/hunspell spell-checking backend kde-misc kdeconnect X Enable remote input mousepad plugin using x11-libs/libfakekey pulseaudio Enable system volume control plugin using media-sound/pulseaudio wayland Enable remote input mousepad plugin using kde-frameworks/kwayland kimtoy scim Enable Smart Common Input Method support kio-gdrive kaccounts Use kde-apps/kaccounts-integration backend (default) instead of dev-libs/qtkeychain kmarkdownwebview webkit Use dev-qt/qtwebkit instead of dev-qt/qtwebengine tellico discid Add support for reading disc IDs from audio CDs yaz Add support for searching Z39.50 databases kde-plasma discover firmware Enable support for firmware upgrades using sys-apps/fwupd kde-cli-tools kdesu Build graphical frontend for kde-frameworks/kdesu kdeplasma-addons comic Enable comic applet (requires deprecated kde-frameworks/kross) share Enable applet for quickly sharing data to a variety of sources webengine Enable dictionary and web browser applets using dev-qt/qtwebengine kinfocenter pci Show advanced PCI information ksysguard network Enable per-process network statistic collection using dev-libs/libnl networkmanager Enable improved backend for Network statistics using kde-frameworks/networkmanager-qt pcap Enable per-process network statistic collection using net-libs/libpcap kwin multimedia Enable effect video button in desktop effects KCM screencast Enable screencast portal using media-video/pipewire libksysguard designer Build plugins for dev-qt/designer webengine Enable display of detailed memory information using dev-qt/qtwebengine. plasma-desktop emoji Build emojipicker applet using app-i18n/ibus and media-fonts/noto-emoji ibus Use ibus input method via app-i18n/ibus kaccounts Build the OpenDesktop integration plugin scim Enable applets that use app-i18n/scim plasma-meta browser-integration Enable integration with Chrome/Firefox with browser extensions crypt Pull in kde-plasma/plasma-vault for encrypted vaults integration desktop-portal Enable sys-apps/xdg-desktop-portal backend implementation for Plasma discover Pull in resources management GUI; a centralised GHNS alternative and optional sys-apps/fwupd frontend display-manager Pull in a graphical display manager grub Pull in Breeze theme for sys-boot/grub gtk Enable Breeze widget style and system settings module for GTK+ kwallet Enable support for KWallet auto-unlocking via kde-plasma/kwallet-pam legacy-systray Add support for legacy applications using kde-plasma/xembed-sni-proxy plymouth Pull in Breeze theme for sys-boot/plymouth pulseaudio Install Plasma applet for PulseAudio volume management qrcode Enable support for easy WiFi network sharing using QR codes with kde-plasma/plasma-nm sddm Pull in the x11-misc/sddm display manager and system settings module sdk Pull in kde-plasma/plasma-sdk for Plasma development smart Pull in kde-plasma/plasma-disks for disk health monitoring thunderbolt Pull in kde-plasma/plasma-thunderbolt control center module wallpapers Install wallpapers for the Plasma Workspace plasma-nm modemmanager Enable support for mobile broadband devices openconnect Build support for the OpenConnect VPN client teamd Enable Teamd control support plasma-workspace appstream Enable AppStream software metadata support geolocation Enables dataengine providing location information qalculate Enable Qalculate runner using sci-libs/libqalculate qrcode Enable support for creating QR codes from clipboard data using kde-frameworks/prison screencast Enable screencast portal using media-video/pipewire telemetry Enable User Feedback control module for kde-plasma/systemsettings powerdevil brightness-control Enable screen brightness control using app-misc/ddcutil wireless Enable wireless energy saving actions via kde-frameworks/bluez-qt and kde-frameworks/networkmanager-qt xdg-desktop-portal-kde screencast Enable screencast portal using media-video/pipewire lxde-base lxdm gtk3 Use GTK+3 instead of 2 lxterminal gtk3 Use GTK+3 instead of GTK+2 lxqt-base liblxqt backlight Enable backlight control features. lxqt-config monitor Build monitor settings tool touchpad Build touchpad settings tool lxqt-meta about Install lxqt-base/lxqt-about admin Install lxqt-base/lxqt-admin archiver Install app-arch/lxqt-archiver display-manager Install a graphical display manager filemanager Install x11-misc/pcmanfm-qtfile manager lximage Install media-gfx/lximage-qtimage viewer minimal Do not install x11-wm/openboxwindow manager nls Install dev-qt/qttranslations to better support different locales powermanagement Install lxqt-base/lxqt-powermanagement package processviewer Install x11-misc/qps package screenshot Install x11-misc/screengrab package sddm Install x11-misc/sddm display manager ssh-askpass Install lxqt-base/lxqt-openssh-askpass user password prompt tool sudo Install lxqt-base/lxqt-sudo terminal Install x11-terms/qterminal package trash Install gnome-base/gvfs to enable 'trash' functionality in x11-misc/pcmanfm-qt lxqt-panel colorpicker Build colorpicker plugin cpuload Build cpuload plugin desktopswitch Build desktopswitch plugin directorymenu Build directorymenu plugin dom Build dom plugin kbindicator Build kbindicator plugin mainmenu Build mainmenu plugin mount Build mount plugin networkmonitor Build networkmonitor plugin quicklaunch Build quicklaunch plugin showdesktop Build showdesktop plugin spacer Build spacer plugin statusnotifier Build statusnotifier plugin sysstat Build sysstat plugin taskbar Build taskbar plugin tray Build tray plugin volume Build volume plugin worldclock Build worldclock plugin mail-client aerc notmuch Enable support for net-mail/notmuch alot doc Install user manual and API documentation alpine chappa enhance Alpine by applying Eduardo Chappa's patches onlyalpine installs only the alpine binary, so it does not collied with pico and/or pine passfile Adds support for caching passwords into a file between sessions smime Enable support for S/MIME balsa rubrica Adds support for rubrica addressbook claws-mail archive Enable archiving plugin bogofilter Build mail-filter/bogofilter plugin dillo Enable dillo html viewer plugin gdata Enable plugin for access to Google data providers gtk2 Build support for GTK+-2 instead of GTK+-3 (live ebuild only) libcanberra Enable sound notification in connection with USE=notification libnotify Enable notification on the desktop in connection with USE=notification litehtml Enable dev-libs/gumbo html viewer plugin notification Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify pgp Enable PGP support sieve Build plugin for sieve filter support smime Build plugin for S/MIME support spam-report Enable plugin for spam reporting to various services spamassassin Build mail-filter/spamassassin plugin valgrind Add support for memory debugging using valgrind evolution archive Enable archives support in attachments via app-arch/gnome-autoar bogofilter Build mail-filter/bogofilter plugin geolocation Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain highlight Enable text highlighting plugin ldap Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap spamassassin Build mail-filter/spamassassin plugin weather Enable optional weather calendar support ytnef Enable optional TNEF attachments parser support using net-mail/ytnef geary ytnef Enable optional TNEF attachments parser support using net-mail/ytnef mutt autocrypt Enable autocrypt.org support berkdb Enable sys-libs/db database backend for header caching gdbm Enable sys-libs/gdbm database backend for header caching gpgme Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP hcache Enable header cache, one database backend needs to be enabled lmdb Enable dev-db/lmdb database backend for header caching pgp-classic Build classic_pgp backend to support PGP/MIME and traditional/inline PGP pop Enable support for POP3 mailboxes smime-classic Build classic_smime backend to support S/MIME smtp Enable support for direct SMTP delivery tokyocabinet Enable dev-db/tokyocabinet database backend for header caching neomutt berkdb Enable BDB (Berkley DB) backend for header caching gdbm Enable GDBM (GNU dbm) backend for header caching gpgme Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP kyotocabinet Enable Kyoto Cabinet database backend for header caching lmdb Enable LMDB (Lightning Memory-Mapped Database) backend for header caching notmuch Enable support for net-mail/notmuch pgp-classic Build classic_pgp backend to support PGP/MIME and traditional/inline PGP qdbm Enable QDBM (Quicker Database Manager) database backend for header caching smime-classic Build classic_smime backend to support S/MIME tokyocabinet Enable Tokyo Cabinet database backend for header caching roundcube change-password Allow users to change passwords through Roundcube enigma Add dependencies to support server-side GnuPG signing and/or encryption through the enigma plugin ldap Add dependencies to support connecting to an LDAP address book server s-nail kerberos If network is enabled, this adds support for GSSAPI login on IMAP through virtual/krb5. net Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call. ssl If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl. sylpheed oniguruma Use dev-libs/oniguruma for regular expression thunderbird clang Use Clang compiler instead of GCC eme-free Disable EME (DRM plugin) cabability at build time lto Enable Link Time Optimization (LTO). Requires Gold linker when using GCC or LDD linker when using Clang openh264 Use media-libs/openh264 for H.264 support instead of downloading binary blob from Mozilla at runtime pgo Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time. system-av1 Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled. system-harfbuzz Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled. system-icu Use the system-wide dev-libs/icu instead of bundled. system-jpeg Use the system-wide media-libs/libjpeg-turbo instead of bundled. system-libevent Use the system-wide dev-libs/libevent instead of bundled. system-libvpx Use the system-wide media-libs/libvpx instead of bundled. system-webp Use the system-wide media-libs/libwebp instead of bundled. trojita password Store passwords securely via dev-libs/qtkeychain pim Enable support for KDE PIM resources integration via kde-apps/akonadi addressbook plugin mail-filter MailScanner exim Set mail-mta/exim to used MTA postfix Set mail-mta/postfix to used MTA spamassassin Enable usage of mail-filter/spamassassin for spam protection amavisd-new courier Add courier support dkim Add DomainKeys Identified Mail support qmail Add qmail support razor Add support for mail-filter/razor rspamd Add support for mail-filter/rspamd extension (HTTP only) rspamd-https Add support for mail-filter/rspamd extension (both HTTP and HTTPS) spamassassin Add support for mail-filter/spamassassin bogofilter tokyocabinet Enable Tokyo Cabinet database support dcc rrdtool Enable net-analyzer/rrdtool interface scripts libmilter poll Use poll instead of select maildrop authlib Add courier-authlib support dovecot Add dovecot authentication support tools Install maildirmake and deliverquota tools trashquota Count deleted messages as part of the maildir quota mimedefang poll Use poll instead of select opendkim ldap Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports. lmdb Add support for using dev-db/lmdb lua Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts. memcached Add support for using dev-libs/libmemcached opendbx Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types poll Use poll() instead of select() for the provided asynchronous resolver library. querycache Add support for query caching (requires 'berkdb' flag) sasl Used to authenticate to a LDAP server in various ways if required. stats Add support for statistics (requires 'opendbx' flag) unbound Use the unbound dnssec library to perform DKIM DNS queries. opendmarc reports Install the reports binaries: expire, import, reports, params spf Use the mail-filter/libspf2 for Sender Policy Framework checking postfwd tools Install additional tools for testing postfwd postgrey targrey Enables the targrey patch pyzor gdbm Enables the Gdbm back-end database engine for pyzord gevent Use dev-python/gevent to enable asynchronous operation mysql Enables the MySQL back-end database engine for pyzord through dev-python/mysqlclient. pyzord Enable the pyzord server daemon redis Enables the redis back-end database engine for pyzord through dev-python/redis-py rspamd pcre2 Use dev-libs/libpcre2 spamassassin cron Install a cron job to update SpamAssassin's rules daily. qmail Build qmail functionality and docs spamdyke ssl Enables TLS protocol for spamdyke mail-mta courier fax Enables fax support in the courier mail server norewrite Prevents courier mail server from mangling virtual user addresses when sending web Enable the web interface webmail Enable the webmail interface exim arc Adds support for Authenticated Receive Chain (ARC) dane Adds support for DNS-based Authentication of Named Entities dcc Adds support for Distributed Checksum Clearinghouse (DCC) dkim Adds support for DomainKeys Identified Mail (DKIM) dlfunc Install local_scan.h header to compile separate dlfunc libraries dmarc Adds support for DMARC dnsdb Adds support for a DNS search for a record whose domain name is the supplied query dovecot-sasl Adds support for Dovecot's authentication dsn Adds support for Delivery Status Notifications (DSN) exiscan-acl Patch providing support for content scanning lmtp Adds support for lmtp mbx Adds support for UW's mbx format pkcs11 Require pkcs11 support in net-libs/gnutls with USE=gnutls prdr Adds support for Per-Recipient Data Response proxy Add support for being behind a proxy, such as HAProxy redis Adds support for querying dev-db/redis spf Adds support for Sender Policy Framework srs Adds support for Sender Rewriting Scheme tpda Adds support for Transport Post-Delivery Actions msmtp daemon Build/install msmtpd MTA daemon mta Enable this to install as system-wide MTA netqmail authcram Enable AUTHCRAM support gencertdaily Generate SSL certificates daily instead of hourly highvolume Prepare netqmail for high volume servers pop3 Include POP3 server notqmail authcram Enable AUTHCRAM support gencertdaily Generate SSL certificates daily instead of hourly highvolume Prepare notqmail for high volume servers pop3 Include POP3 server opensmtpd mta Enable this to install as system-wide MTA postfix dovecot-sasl Enable net-mail/dovecot protocol version 1 (server only) SASL implementation eai Add support for SMTPUTF8 ldap-bind Add support for binding to LDAP backend using dev-libs/cyrus-sasl lmdb Add support for using dev-db/lmdb for lookup tables memcached Add support for using net-misc/memcached for lookup tables qpsmtpd postfix create user with permissions for proper postfix interaction ssmtp mta Install symlinks for sendmail-compatible MTA. mate-base caja mate Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment. packagekit Enable support for installing via PackageKit based on mimetype mate base Install base MATE Desktop applications that are recommended for the most common usage; for example, this installs the file manager. Disable this and other USE flags if you want a more minimal MATE Desktop. extras Install additional MATE Desktop applications that are recommended for extended usage of the MATE Desktop as upstream sees it; for example, this installs MATE Desktop's office related applications. Disable this if you plan to use your own non-MATE Desktop alternatives or a custom mixture of MATE and non-MATE packages. help Install gnome-extra/yelp to handle in application help menus and documentation browsing notification Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments. themes Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time. mate-applets cpupower Enable support for cpu frequency manipulation using sys-power/cpupower mate-applets-meta appindicator Pull in mate-extra/mate-indicator-applet for AppIndicator applet sensors Pull in mate-extra/mate-sensors-applet for hw sensors applet mate-control-center accountsservice Add support for AccountsService mate-session-manager gles2 Build with support for GLESv2 acceleration sessions xtrans Build with Xtrans support; WARNING: Disabling this flag will result in ICE binding on all interfaces mate-settings-daemon rfkill build support for rfkill mate-extra caja-extensions cdr Add an extension to burn files to cds using app-cdr/brasero. gajim Add an extension to support net-im/gajim. image-converter Add image conversion support. mail Add an extension to support e-mail functionality. open-terminal Add an extension to support an open terminal. pidgin Add an extension to support net-im/pidgin share Add an extension to support sharing files. wallpaper Add an extension to support setting an image as the current wallpaper mate-polkit accountsservice Support extraction of data from AccountsService mate-power-manager applet Enable building of the MATE applet. libsecret Support locking of keyring via app-crypt/libsecret mate-utils applet Enable the mate dictionary applet media-fonts corefonts tahoma Also install the Tahoma font. Due to the lack of a free bold variant, this may render badly. See bug 184790. culmus ancient Install ancient semitic scripts fancy Install fancy fonts fontforge Use media-gfx/fontforge to build fonts from source taamey Install taamey fonts dejavu fontforge Use media-gfx/fontforge to build fonts from source fontawesome otf Install the OpenType version of the font ttf Install the TrueType version of the font ibm-plex otf Install OTF fonts ttf Install TTF fonts infinality-ultimate-meta free Install fonts for the "free" preset latin Install additional latin fonts minimal Install a minimal set of fonts ms Install (free) fonts for the "ms" preset intlfonts bdf Install BDF fonts in addition to PCF non-free Install non-free Tibetan fonts liberation-fonts fontforge Use media-gfx/fontforge to build fonts from source montecarlo bdf Install BDF fonts in addition to PCF mplus-outline-fonts ipafont Generates new fonts merged with media-fonts/ja-ipafonts noto extra Install full upstream font set noto-emoji buildfont Build Noto Emoji font with supplied images. sil-charis compact Use more compactly spaced font sil-gentium compact Also install more compact version of the font. terminus-font a-like-o Changes view of letter 'a' - a looks like o (see homepage) center-tilde Place the '~' character vertically centered on the line instead of to the top. distinct-l ll2 variant with more distinctive l (lowercase L) otf Install Open Type Font (OTF) (required for HarfBuzz backend) pcf Install Portable Compiled Font (PCF) (required for X11) pcf-unicode-only Remove non-unicode PCF fonts that could be problematic. See bug #520222. psf Install PC Screen Font (PSF) with unicode data (for linux console) quote Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage) ru-dv Changes view of Russian letters 'de' and 've' (see homepage) ru-g Changes view of Russian letter 'ge' (see homepage) ru-i Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage) ru-k Changes view of Russian letter 'k' (see homepage) unifont fontforge Use media-gfx/fontforge to build fonts from source utils Install unifont utilities media-gfx ahoviewer rar Rar archive support zip Zip archive support album plugins Install optional plugins themes Install optional themes alembic arnold Add support for arnold renderer (experimental) boost Use dev-libs/boost library examples Install alembic examples hdf5 Add support sci-libs/hdf5 maya Compile Alembic plugin for Maya (experimental) prman Compile Alembic plugin for Renderman (experimental) test Build and run the test-suite zlib Use sys-libs/zlib for compressions apngasm 7z Enable support for 7zip compression zopfli Enable support for Zopfli compression asymptote boehm-gc Enables using the Boehm-Demers-Weiser conservative garbage collector offscreen Enables off-screen rendering sigsegv Enables using dev-libs/libsigsegv blender abi6-compat Build for OpenVDB ABI 6. abi7-compat Build for OpenVDB ABI 7. alembic Add support for Alembic through media-gfx/alembic. bullet Enable Bullet (Physics Engine). collada Add support for Collada interchange format through media-libs/opencollada. color-management Enable color management via media-libs/opencolorio. cuda Build cycles renderer with nVidia CUDA support. cycles Build cycles renderer (requires media-libs/openimageio and dev-libs/boost). dds Adds DDS textures support to Blender. doc Build C and Python API documentation directly from the source code. elbeem Adds surface fluid simulation to Blender using El'Beem library. game-engine Adds Game Engine support to Blender. headless Build without graphical support (renderfarm, server mode only). llvm Enable features depending on llvm. man Build and install man pages. ndof Enable NDOF input devices (SpaceNavigator and friends). opencl Allow OpenCL Graphics Acceleration. This may require extra graphics card drivers. openimageio Enable OpenImageIO Support opensubdiv Add rendering support form OpenSubdiv from Dreamworks Animation through media-libs/opensubdiv. openvdb Add GPU preview rendering. Only works with nVidia cards. osl Add support for OpenShadingLanguage scripting. player Build the Blender Player. THis requires the Game engine. standalone Build the standalone version of Cycles. system-numpy Use the system numpy implementation rather than a local copy. system-python Use the system python implementation rather than a local copy. tbb Use threading building blocks library from dev-cpp/tbb. test Build the provided unit tests. valgrind Add support for memory debugging using dev-util/valgrind chafa tools Build command-line tools cura usb Access 3D printers via USB curaengine arcus Build with support for communication library between internal components for Ultimaker software darktable flickr Add support for uploading photos to flickr geolocation Enable geotagging support kwallet Enable encrypted storage of passwords with kde-frameworks/kwallet lto Enable link-time optimisations in the RawSpeed library opencl Enable opencl support system-lua Use dev-lang/lua instead of the bundled liblua tools Install tools for generating base curves and noise profiles digikam addressbook Enable akonadi contact integration dnn Build neural network faces engine module heif Enable support for ISO/IEC 23008-12:2017 HEIF files using media-libs/x265 imagemagick Enable support for additional image formats such as XCF, FITS, HEIC etc. lensfun Enable support for media-libs/lensfun marble Enable support for geolocation using kde-apps/marble mediaplayer Enable support for media player using media-libs/qtav panorama Build the panorama plugin which requires media-gfx/hugin semantic-desktop Enable kde-frameworks/kfilemetadata support vkontakte Build net-libs/libkvkontakte plugin for vkontakte.ru webkit Build with dev-qt/qtwebkit instead of dev-qt/qtwebengine eog-plugins map Enable world map display using media-libs/libchamplain picasa Enable uploading to Google's Picasa Web Albums eom imagemagick Use media-gfx/imagemagick as an external backend for the thumbnailer exact-image swig Adds Swig support dev-lang/swig exiv2 webready Support reading metadata over the internet fbida X Install the Motif based image viewer "ida" fbcon Install the framebuffer image viewer "fbi" ghostscript Install the framebuffer ghostscript viewer "fbgs" fdm-materials embedded Build for Ultimaker Embedded software fim bmp Enable BMP file support dia Enable DIA file support via app-office/dia imagemagick Use convert from media-gfx/imagemagick as fallback file opener pcx Enable PCX file support xfig Enable FIG file support via media-gfx/xfig fontforge truetype-debugger Enable truetype debugger in fontforge woff2 Enable support for WOFF2 format fotowall webcam Enable webcam support freewrl java Build and install java EAI/SAI support library libeai Build EAI C library opencl Enable OpenCL support osc Allows for OSC-based control and communication between multiple freewrl instances rbp Enable support for Rigid Body Physics geeqie ffmpegthumbnailer Enable video thumbnail support with media-video/ffmpegthumbnailer gpu-accel Enable GPU acceleration support - experimental gtk3 Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2 map Enable items map display - experimental gimp heif Enable support for ISO/IEC 23008-12:2017 HEIF files vector-icons Enable support for vector icons (experimental) gmic cli Build CLI interface krita Build media-gfx/krita plugin opencv Enable support for webcams using the OpenCV library gnofract4d doc Install user manual gnome-photos flickr Ensure runtime Flickr support graphicsmagick dynamic-loading Compile graphicsmagick with dynamically loadable modules fpx Enable FlashPix support with media-libs/libfpx q16 Set storage quantum size to 16 (~2*memory) q32 Set storage quantum size to 32 (~5*memory) graphviz X Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo) devil Enables DevIL output plugin -Tdevil gtk Enables gtk+ output plugin -Tgtk (needs cairo) gts Enables support for GNU Triangulated Surface Library (required for sfdp to work) lasi Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo) gthumb http Enable webservice integration through net-libs/webkit-gtk slideshow Enable slideshow plugin hugin sift automatically align images with media-gfx/autopano-sift-C imagemagick corefonts Use media-fonts/corefonts which is required by some commands fpx Enable media-libs/libfpx support hdri Enable High Dynamic Range Images formats heif Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image format using media-libs/libheif lqr Enable experimental liquid rescale support using media-libs/liblqr opencl Enable OpenCL support pango Enable Pango support using x11-libs/pango q32 Set quantum depth value to 32 q8 Set quantum depth value to 8 imv freeimage Use media-libs/freeimage as image library heif Use media-libs/libheif as image library libnsgif Use media-libs/libnsgif as image library inkscape cdr Enable support for CorelDRAW files via media-libs/libcdr dia Enable DIA flow chart import via app-office/dia inkjar Enable support for OpenOffice.org SVG jar files svg2 Enable support for new SVG2 features visio Enable support for Microsoft Visio diagrams via media-libs/libvisio wpg Enable support for WordPerfect graphics via app-text/libwpg iscan-plugin-gt-f500 minimal Install the firmware only, and not the plugin. jpeg2ps metric Default to A4 paper size kphotoalbum map Enable map display support using kde-apps/marble share Enable support for a share menu using kde-frameworks/purpose krita color-management Enable color management via media-libs/opencolorio heif Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image format using media-libs/libheif qtmedia Enable sound support for animations via dev-qt/qtmultimedia vc Enable support for dev-libs/vc, could be a significant speed boost librecad 3d Require all 2D coordinates stored as 3D tools Build additional tool programs: tff2lff luminance-hdr fits Enable support for the FITS format mandelbulber opencl Enable GPU rendering support using OpenCL nomacs opencv Build support for media-libs/opencv plugins Build officially support plugins nvidia-texture-tools cg Enable NVIDIA C graphics compiler toolkit plug-in glew Enable support for The OpenGL Extension Wrangler Library (media-libs/glew) openclipart gzip Compresses clip art using gzip openexr_viewers cg Add support for nvidia's cg shaders openscad ccache Use dev-util/ccache to speed up rebuilds openvdb abi3-compat Disables newer features to maintain compatibility with ABI3. abi4-compat Disables newer features to maintain compatibility with ABI4. abi5-compat Disables newer features to maintain compatibility with ABI5. abi6-compat Disables newer features to maintain compatibility with ABI6. abi7-compat Disables newer features to maintain compatibility with ABI7. numpy Build pyopenvdb with support for dev-python/numpy utils Build utility binaries photoqt devil Support additional image formats using media-libs/devil freeimage Support additional image formats using media-libs/freeimage pngcrush system-libs Use libpng and libz provided by system potrace metric default to a4 paper size and metric measurement povray io-restrictions POV-Ray's mechanism for control of I/O operations mkl Enable support for Intel Vector Math Library, part of sci-libs/mkl pqiv archive Enable support for images in archives and cbX comic book files pstoedit emf Enable media-libs/libemf support pptx Enable support for generating PowerPoint pptx files qimgv opencv Enable HQ scaling via media-libs/opencv video Add support for gif/webm playback via libmpv shotwell opencv Enable face detection via media-libs/opencv ufraw contrast enable contrast setting option fits Enable support for the FITS image format through sci-libs/cfitsio timezone enable DST correction for file timestamps xpaint pgf Support for loading PGF images xsane ocr Enable support for Optical Character Recognition reader yafaray fastmath Enable mathematic approximations to make code faster fasttrig Enable trigonometric approximations to make code faster opencv Use media-libs/opencv media-libs a52dec djbfft Prefer D.J. Bernstein's library for fourier transforms allegro dumb Enable media-libs/dumb module library support physfs Enable physfs support vga Enables the VGA graphics driver alsa-lib alisp Enable support for ALISP (ALSA LISP) interpreter for advanced features. thread-safety thread-safe API functions alure dumb Enable media-libs/dumb module library support fluidsynth Enables Fluidsynth MIDI software synthesis assimp samples Build viewer library aubio double-precision Compile in double precision mode. avidemux-core nvenc Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards. system-ffmpeg Use the ffmpeg provided by the system. avidemux-plugins aften Enable A/52 (AC-3) audio encoder support. amr Enable Adaptive Multi-Rate format support via media-libs/opencore-amr. dcaenc Enable DTS Coherent Acoustics audio encoder support via media-sound/dcaenc. fdk Adds support for encoding AAC using media-libs/fdk-aac. fribidi Enable unicode bidirectional algorithm support via dev-libs/fribidi. nvenc Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards. twolame Enable TwoLAME support via media-sound/twolame, an optimised MPEG Audio Layer 2 (MP2) encoder. vpx Enable WebM VP8 Codec SDK support via media-libs/libvpx. x265 Enables HEVC support with media-libs/x265. cal3d 16bit-indices Enables use of 16bit indices chromaprint tools Build and install fpcalc and fpcollect tools clutter egl Enable EGL backend. gtk Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend cogl gles2 Enable OpenGL ES 2.0 support kms Enable KMS support. pango Build cogl-pango library for x11-libs/pango integration coin exceptions Compile with C++ exceptions man Build and install man pages qthelp Build API documentation in QtHelp format dav1d 10bit Add support for building 10-bit and 12-bit AV1. 8bit Add support for decoding 8-bit AV1. asm Enable custom assembly for faster decoding. devil allegro Add support for Allegro nvtt Add support for media-gfx/nvidia-texture-tools dumb allegro Add support for Allegro 4 esdl image Enable image support faad2 digitalradio Digital Radio Mondiale (warning: disables other decoders) flickcurl raptor Use media-libs/raptor for proper RDF serializing fontconfig-infinality nyx Additional style using croscorefonts freetype adobe-cff Use Adobe CFF as default font-renderer bindist Disable ClearType support (see http://freetype.org/patents.html) brotli Enable brotli decompression support via app-arch/brotli bzip2 Support bzip2 compressed PCF fonts. cleartype_hinting New bytecode hinting mode for TrueType fonts that activates subpixel hinting (a.k.a. ClearType hinting) by default fontforge Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger) harfbuzz Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies! infinality Enable infinality options for improved LCD filtering utils Install utilities and examples from ft2demos freeverb3 forcefpu Disable assembly code plugdouble Build plugins in double precision mode (default is float) ganv fdgl Use experimental force-directed graph layout gd webp Enable support for the webp format gegl lensfun Enable support for media-libs/lensfun. umfpack Enable sparse solving via sci-libs/umfpack. gmtk dconf Enable support for gnome-base/dconf grilo network Enable network access for media discovery using net-libs/libsoup playlist Enable support for playlists through dev-libs/totem-pl-parser gst-plugins-bad bzip2 Enable bzip2 encoder/decoder plugin egl Enable EGL support gles2 Enable GLES2 support gst-plugins-base X Enable ximagesink and xvimagesink plugins; build GLX platform support if USE=opengl is enabled; build x11 windowing system support if USE=egl is enabled egl Enable EGL platform support gbm Enable Graphics Buffer Manager based EGL windowing system support (requires egl and at least one of gles or opengl) gles2 Enable OpenGL library and plugin via GLESv2 API (requires egl) ivorbis Enable integer based vorbis decoder opengl Enable OpenGL library and plugin via desktop OpenGL API pango Enable pango GStreamer plugin wayland Enable Wayland EGL windowing system support (requires egl and at least one of gles2 or opengl) gstreamer orc Disable some PaX memory protections to allow plugins that use dev-lang/orc for runtime optimization to be used on hardened PaX systems unwind Enable sys-libs/libunwind usage for better backtrace support in leaks tracer module harfbuzz glib Compile with GLib Unicode support graphite Use graphite to render complex non-Roman writing systems ilmbase large-stack Enables code to take advantage of large stack support imlib2 X Use the X window system bzip2 Bzip2 loader support gif Gif image loader support jpeg Jpeg image loader support mp3 ID3 loader support png PNG image loader support shm Use MIT shared memory support for X image transfer tiff TIFF image loader support webp WEBP image loader support zlib Zlib loader support leptonica utils Install command-line utilities libafterimage shaping Use MIT shaped X windows extention. shm Use MIT shared memory extention for X image transfer. libass harfbuzz Enables OpenType shaping via media-libs/harfbuzz. libavif aom Enable support for the AOM codec encoding and decoding dav1d Enable support for the dav1d codec decoding extras Build extra apps (avifenc, avifdec) and test files gdk-pixbuf Build a gdk-pixbuf loader rav1e Enable support for the rav1e codec encoding libbdplus aacs Add support for decryption of AACS libbluray aacs Add support for decryption of AACS bdplus Use media-libs/libbdplus for BD+ decryption java Add support for BD-J utils Install command-line utilities and examples libcanberra alsa Enables ALSA sound driver. gstreamer Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available. gtk Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable. gtk3 Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable. pulseaudio Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime. sound Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce. tdb Enables Trivial Database support for caching purposes. libde265 dec265 Enable build of dec265 example program enc265 Enable build of enc265 tool sdl Enable video output of dec265 example program with media-libs/libsdl static-libs Enable build of static libraries tools Enable installation of varous binary tools libepoxy egl Enable EGL support. libextractor apparmor Enable apparmor support using sys-libs/libapparmor archive Enable archive support using app-arch/libarchive gsf Enable OLE2 (MS Office) plug-in support using gnome-extra/libgsf midi Enable MIDI support through media-libs/libsmf libffado test-programs Install standalone test programs libggi 3dfx Enables support for Voodoo chipsets, also called 3DFX and TDFX vis Enables sparc vis support for libggi libgphoto2 serial Enable serial port support libgpod gtk Enable ArtworkDB support libgroove chromaprint Enable audio fingerprinting using media-libs/chromaprint. loudness Enable loudness detection according to the EBU R128 standard using media-libs/libebur128. sound Enable audio playing. libheif gdk-pixbuf Enable x11-libs/gdk-pixbuf plugin go Enable building dev-lang/go code/examples liblastfm fingerprint Build the lastfm-fingerprint library libmp4v2 utils Install command-line utilities libmypaint gegl Add support for media-libs/gegl libopenglrecorder openh264 Enable H.264 support using media-libs/openh264 vpx Enable VP8/VP9 codec support via media-libs/libvpx libpagemaker tools Build command line file format conversion tools libplacebo glslang Use dev-util/glslang to compile GLSL lcms Add support for color management via media-libs/lcms shaderc Use media-libs/shaderc to compile GLSL vulkan Add support for the vulkan graphics API libpng apng support unofficial APNG (Animated PNG) spec libpng-compat apng support unofficial APNG (Animated PNG) spec libprojectm gles2 Provide support for OpenGL ES 2 and 3 libsdl joystick Control joystick support (disable at your own risk) sound Control audio support (disable at your own risk) tslib Build with tslib support for touchscreen devices video Control video support (disable at your own risk) libsdl2 fcitx4 Enable support for app-i18n/fcitx 4 gles2 include OpenGL ES 2.0 support haptic Enable the haptic (force feedback) subsystem ibus Enable support for app-i18n/ibus joystick Control joystick support (disable at your own risk) kms Build the KMSDRM video driver sound Control audio support (disable at your own risk) tslib Build with tslib support for touchscreen devices video Control video support (disable at your own risk) vulkan Enable Vulkan support libtgvoip dsp Enable signal processing (echo cancellation, noise suppression, and automatic gain control) libvisio tools Build conversion tools libvpx highbitdepth Enable 10 and 12 bit support for VP9. postproc Enable additional post processing filters svc Enable spatial-svc support (experimental) libwebp swap-16bit-csp Enable byte swapping for 16 bit colorspace libyami dmabuf Enable dma_buf buffer sharing. egl Enable EGL support. md5 Add support for generating md5 sums for each frame. v4l Add support for V4L2 hardware codecs. libzmf tools Build conversion tools lilv dyn-manifest Add LV2 Dynamic Manifest support. See http://lv2plug.in/ns/ext/dynmanifest/ lsp-plugins lv2 build lv2 plugins lv2 plugins Enables examples plugins. lvtk gtk2 Enable x11-libs/gtk+:2 based GUI support tools Compile and install ttl2c tool mesa classic Build drivers based on the classic architecture. d3d9 Enable Direct 3D9 API through Nine state tracker. Can be used together with patched wine. dri3 Enable DRI3 support. egl Enable EGL support. gallium Build drivers based on Gallium3D, the new architecture for 3D graphics drivers. gbm Enable the Graphics Buffer Manager for EGL on KMS. gles1 Enable GLESv1 support. gles2 Enable GLESv2 support. llvm Enable LLVM backend for Gallium3D. lm-sensors Enable Gallium HUD lm-sensors support. opencl Enable the Clover Gallium OpenCL state tracker. osmesa Build the Mesa library for off-screen rendering. valgrind Compile in valgrind memory hints vdpau Enable the VDPAU acceleration interface for the Gallium3D Video Layer. vulkan Enable Vulkan drivers vulkan-overlay Build vulkan-overlay-layer which displays Frames Per Second and other statistics wayland Enable support for dev-libs/wayland xa Enable the XA (X Acceleration) API for Gallium3D. xvmc Enable the XvMC acceleration interface for the Gallium3D Video Layer. zink Enable the Zink OpenGL-over-Vulkan Gallium driver mlt compressed-lumas Compress the luma files in png. frei0r Build the module for media-plugins/frei0r-plugins kdenlive Build support for kde-apps/kdenlive lua Build SWIG bindings for Lua melt Build the melt commandline tool opencv Build motion tracking module using media-libs/opencv python Build SWIG bindings for Python rtaudio Builds rtaudio consumer for native audio support on multiple platforms. vidstab Enabled video stabilization with media-libs/vidstab. netpbm rle Build converters for the RLE format (utah raster toolkit) opencv contrib Install user contributed scripts from opencv_contrib (Experimental!) contribcvv CVV module requires Qt5 contribdnn DNN module contrib requires tiny dnn contribfreetype Enable Drawing UTF-8 strings with freetype/harfbuzz contribhdf HDF module requires sci-libs/hdf5 contribovis Enable Ogre vision module support contribsfm SFM module requires eigen, gflags, and glog contribxfeatures2d Enables xfeatures2d and autodownload of samples in contrib cuda Enable NVIDIA Cuda computations support (Experimental!) dnnsamples Download dnn caffeemodel samples download Enable download during cmake configure eigen Enable usage of dev-cpp/eigen for computations features2d Enable features2d module gdal Enable support for sci-libs/gdal library gflags Use Google's C++ argument parsing library glog Use Google's C++ loggin library gtk3 Enable x11-libs/gtk+:3 support lto Build using Link Time Optimizations (LTO) opencl Add support for OpenCL opencvapps Enable compilation with opencvapps tesseract Use Google's OCR Engine testprograms Build and install programs for testing OpenCV (performance) vtk Build new 3D visualization module viz based on sci-libs/vtk openexr utils Build several utility binaries for verifying and manipulating EXR files. openh264 plugin Install the Gecko Media Plugin (GMP) for use with Mozilla packages utils Install the CLI encoder and decoder utilities openimageio color-management Enable color management via media-libs/opencolorio dicom Enable DICOM medical image file support via sci-libs/dcmtk field3d Enable f3d file (write) support via media-libs/Field3D opencv Enable OpenCV support via media-libs/opencv openvdb Enable OpenVDB support via media-gfx/openvdb ptex Enable Ptex texture mapping system file support via media-libs/ptex opensubdiv cuda Enable NVIDIA CUDA Toolkit support through dev-util/nvidia-cuda-toolkit opencl Enable OpenCL support through virtual/opencl ptex Adds support for faster per-face texture mapping through media-libs/ptex tbb Enable multithreading with the Intel Threads Building Blocks through dev-cpp/tbb tutorials Install the tutorials opus custom-modes Enable non-Opus modes, e.g. 44.1 kHz and 2^n frames opusfile fixed-point Enable fixed-point arithmetic operations float Enable floating point arithmetic operations http Enable http connections osl partio Use media-libs/partio qt5 Build the osltoy binary phonon designer Install plugin for dev-qt/designer vlc Install VLC Phonon backend phonon-gstreamer network Enable network streaming support via libsoup portmidi test-programs Install various example programs qtav gui Build a video player gui quarter designer Install plugin for dev-qt/designer man Build and install man pages qthelp Build API documentation in QtHelp format quvi json Enable support for JSON output raptor json Enable support for JSON parsing raspberrypi-userland-bin hardfp Use armv6 hardfp ABI rubberband programs Builds also executable applications vamp Enables vamp plugins support (Audio analysing plugins) sdl-mixer fluidsynth Use media-sound/fluidsynth for MIDI support midi basic support for MIDI files mod basic support for MOD files playtools Install playwave and playmus tools (useful for testing) smpeg Use media-libs/smpeg for MP3 support wav support WAVE files sdl-sound physfs Enable support for various formats through dev-games/physfs. sdl2-image webp support loading WEBP images sdl2-mixer fluidsynth Use media-sound/fluidsynth for MIDI support midi basic support for MIDI files mod basic support for MOD files playtools Install playwave and playmus tools (useful for testing) smpeg Use media-libs/smpeg for MP3 support tremor enable OGG Vorbis music via libtremor wav support WAVE files sge image enable sdl-image support spandsp fixed-point Enable fixed point support speex utils Enables speex commandline utilities (speexenc, speexdec). vbr Enable VBR support. svgalib kernel-helper Build the helper kernel module tremor low-accuracy enable 32bit only multiply operations urt tools Install tools vigra valgrind Enable valgrind in make check vulkan-loader layers Include the vulkan layers waffle egl Enable EGL support gbm Enable support for the Generic Buffer Manager (gbm) wayland Enable Wayland support webvfx doc Install doxygen developer documentation x264 interlaced enable interlaced encoding support, this can decrease encoding speed by up to 2% opencl Add support for OpenCL. pic disable optimized assembly code that is not PIC friendly x265 10bit Add support for producing 10bits HEVC. 12bit Add support for producing 12bits HEVC. numa Build with support for NUMA nodes. pic Disable optimized assembly code that is not PIC friendly xine-lib bluray Enable playback of Blu-ray filesystems using media-libs/libbluray dxr3 Enable support for DXR3 mpeg acceleration cards. flac Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates. gtk Build the gdkpixbuf-based image decoder plugin. imagemagick Build the ImageMagick-based image decoder plugin. mad Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag. mmap Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback. truetype Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled. vdr Build the VDR plugin vidix Enable support for vidix video output. vis Adds support for SIMD optimizations for UltraSPARC processors. vpx Enable VP8 codec support via media-libs/libvpx. xvmc Enable support for XVideo Motion Compensation (accelerated mpeg playback). xvid pic disable optimized assembly code that is not PIC friendly zita-resampler tools Install zresample and zretune tools zmusic fluidsynth Enable support for MIDI via media-sound/fluidsynth mpg123 Enable support for MPEG audio playback via media-sound/mpg123 media-plugins alsa-plugins arcam_av Enables Arcam AV control plugin mix Enables upmix and vdownmix plugin usb_stream Enables usb_stream plugin audacious-plugins ampache Support controlling audacious via ampache bs2b Enable Bauer Bauer stereophonic-to-binaural headphone filter cue Support CUE sheets using the libcue library fluidsynth Support FluidSynth as MIDI synth backend gme Support various gaming console music formats http Support HTTP streams through neon scrobbler Build with scrobbler/LastFM submission support sid Build with SID (Commodore 64 Audio) support soxr Build with SoX Resampler support speedpitch Enable speed/pitch effects streamtuner Build the streamtuner plugin calf experimental Enable experimental features/plugins lv2 Add support for Ladspa V2 frei0r-plugins facedetect Enables building of facedetect plugin, which depends on media-libs/opencv scale0tilt Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl gkrellmpc threads Use separate thread to init connection (unsafe) grilo-plugins chromaprint Enable Chromaprint support daap Enable dmap support through net-libs/libdmapsharing flickr Enable Flickr support freebox Build support for viewing TV channels using Freebox gnome-online-accounts Enable net-libs/gnome-online-accounts support thetvdb Build support for thetvdb.com tracker Build support for content discovery using the app-misc/tracker indexer youtube Build support for YouTube content discovery using dev-libs/libgdata gst-plugins-gtk egl Enable EGL platform usage gles2 Enable gtkglsink OpenGL sink based on GLESv2 API opengl Enable gtkglsink OpenGL sink based on desktop OpenGL API gst-plugins-libav libav Use bundled ffmpeg to support systems using libav globally instead of media-video/ffmpeg gst-plugins-meta http Enable http streaming via net-libs/libsoup libvisual Enable visualization effects via media-libs/libvisual vpx Enables vp8 codec support using libvpx, required to play some HTML5 videos gst-plugins-vaapi drm Enable DRM renderer egl Enable EGL support gles2 Enable GLESv2 and GLESv3 support hexter gtk2 Enable x11-libs/gtk+:2 based GUI imlib2_loaders eet Enable Eet image loader xcf Enable XCF image loader ir_lv2 tools Build convert4chan tool mythplugins cdr Allows MythMusic to burn CD-Rs exif Allows MythGallery to read EXIF data from photos fftw Adds visual effects to MythMusic when playing back music hls HTTP Live Streaming support mytharchive Allows you to archive recorded content to CD or DVD mythbrowser Adds a web browser within MythTV mythgame Adds a frontend to various ROM emulators within MythTV mythmusic Adds the ability for MythTV to act as a music player mythnetvision Adds the ability to view netvision devices within MythTV mythnews Adds a news viewer within MythTV mythweather Adds weather information within MythTV mythzmserver Build mythzmserver daemon needed by zoneminder on LAN mythzoneminder Adds support for zoneminder (requires active mythzmserver daemon on LAN). raw Allows MythGallery to view photos saved in RAW format vdr-burn dvdarchive DMH DVD - Archive vdr-cdplayer cdparanoia Enable cdparanoia (audio CD ripper) support vdr-dvbapi dvbcsa use media-libs/libdvbcsa free implementation of the DVB Common Scrambling Algorithm vdr-epgsearch conflictcheckonly install the "conflictcheckonly" vdr-plugin epgsearchonly install the "epgsearchonly" vdr-plugin quicksearch install the "quicksearch" vdr-plugin tre Add support for unlimited fuzzy searching with help of dev-libs/tre library vdr-streamdev client Compile the VDR plugin vdr-streamdev-client that acts like a dvb-budget card server Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the DVB cards used for the local VDR vdr-vdrmanager stream Add support for streaming Video to Android client vdr-weatherng dxr3 enables lower osd color depth for dxr3 cards vdr-xineliboutput bluray Enable BluRay metadata support through media-libs/libbluray cec Enable CEC support through dev-libs/libcec libextractor Use media-libs/libextractor to gather files' metadata in media-player vdr Compile the vdr output plugin to use local or remote xine as output xine Compile the xine input plugin for displaying vdr video and OSD media-radio ax25-tools X Enable some X based configuration tools. fldigi hamlib Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use tucnak hamlib Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio unixcw ncurses Enables building the curses based morse code tutor program 'cwcp'. xastir geotiff Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images media-sound abcde aiff Enable support for Audio Interchange File Format (AIFF) output encoding id3tag Support ID3, ID3v2 tagging of audio files mac Enable support for Monkey's Audio files normalize Add support for normalizing audio file volume levels replaygain Support for Replay Gain metadata, for relative volume adjustment abcm2ps pango Use the pango library to render fonts with non-latin characters alsa-utils bat install basic audio tester (BAT) util libsamplerate install utils that use libsamplerate (e.g. alsaloop) ncurses install utils that use ncurses (e.g. alsamixer) alsaplayer id3tag Enables ID3 tagging with id3tag library amsynth dssi Enable support for DSSI Soft Synth Interface lv2 Add support for Ladspa V2 apulse sdk Install PulseAudio headers and pkg-config files. Be aware apulse is not a full PulseAudio replacement by design and some functionality may be missing. aqualung ifp Enable support for iRiver iFP portable audio players lua Enable support for programmable title formatting with dev-lang/lua mac Enable support for decoding Monkey's Audio files podcast Enable podcast support systray Enable system tray support ardour phonehome contact ardour.org at startup for new announcements ario idle Enable experimental support for MPD's idle command to reduce bandwidth and cpu usage, requires MPD 0.14 asunder mac Support for creation of Monkey's Audio files (APE) audacity id3tag Enables ID3 tagging with id3tag library lv2 Add support for Ladspa V2 portmidi Enable support for MIDI via media-libs/portmidi portmixer Enable the internal portmixer feature portsmf Enable support for Portable Standard Midi File Library sbsms Enables sbsms library support for slower, more accurate pitch and tempo changing twolame Enables twolame support (MPEG Audio Layer 2 encoder) vamp Enables vamp plugins support (Audio analysing plugins) vst Enable VST plugin support audiotools cue Enable CUE sheet support dvda Enable DVD-Audio support twolame Enable twolame support (MPEG Audio Layer 2 encoder) beets badfiles Validate MP3 & FLAC files chromaprint Enable support for acoustic fingerprinting plugin using media-libs/chromaprint discogs Enable support for the discogs API plugin ffmpeg Enable support for the convert plugin to transcode files via media-video/ffmpeg lastfm Enable support for importing personal last.fm playcounts and music genres from last.fm tags mpd Enable support for media-sound/mpd server emulation and statistic gathered from media-sound/mpd replaygain Enable support for Replay Gain metadata calculation during import thumbnail Enable album thumbnails generation webserver Enable embedded webserver support through dev-python/flask bluez-alsa hcitop Enable top-like monitoring tool for HCI ldac Enable support for AOSP media-libs/libldac dispatcher man Generate (and install) man pages with app-text/pandoc mpg123 Enable support for MPEG audio playback via media-sound/mpg123 ofono Enable ofono elephony support cadence a2jmidid Enables support for legacy ALSA sequencer applications in JACK MIDI system cantata cdio Use dev-libs/libcdio-paranoia for CD support (instead of cdparanoia) http-server Enable internal HTTP server to play non-MPD files replaygain Enable ReplayGain support, for relative volume adjustments streaming Enable playback of MPD HTTP streams using LibVLC (media-video/vlc) clementine box Enable filesharing via Box.com dropbox Enable Dropbox support googledrive Enable Google Drive support lastfm Use liblastfm for fetching song info, scrobbling and radio streams moodbar Enable moodbar support projectm Build with ProjectM visualization seafile Enable support for seafile: a file sync service skydrive Enable Skydrive support wiimote Enable support for Wii remote cmus cdio Use libcdio for CD support discid Enable reading the ID of the inserted CD elogind Enable MPRIS support via sys-auth/elogind pidgin Install support script for net-im/pidgin systemd Enable MPRIS support via sys-apps/systemd tremor Use libivorbis from media-libs/tremor instead of media-libs/libvorbis csound beats Build the beats score frontend chua Build the chua opcodes double-precision Use double-precision floating point for audio samples dssi Build the DSSI opcodes fluidsynth Build the fluidsynth opcodes image Build the image opcodes keyboard Build Virtual MIDI keyboard linear Build the linear algebra Opcodes portmidi Build the PortMIDI I/O module samples Install the HRTF datafiles for use with hrtfmove, hrtfmove2, hrtfstat, hrtfearly, and hrtfreverb stk Build the stk opcodes utils Build stand-alone executables for utilities that can also be used via `csound -U` websocket Build the websocket opcode darkice aacplus AAC+ encoding via media-libs/libaacplus twolame Build with twolame support deadbeef converter File format converter cover Support for cover art hotkeys Keyboard shortcuts support lastfm last.fm/AudioScrobbler protocol support notify Desktop notifications support nullout Dummy output driver shellexec Define custom shell commands that can be called on tracks supereq Enable equalizer deinvert liquid improve sound quality using net-libs/liquid-dsp wav wav file support using media-libs/libsndfile denemo alsa Enable alsa support through media-libs/alsa-lib aubio Enable media-libs/aubio support fluidsynth Enable Fluidsynth MIDI software synthesis using media-sound/fluidsynth jack Enable jack support through virtual/jack portaudio Enable support for media-libs/portaudio portmidi Enable support for the media-libs/portmidi backend rubberband Enable support for media-libs/rubberband dir2ogg mac Add support for decoding Monkey's Audio files wma Add support for wma files through mplayer drumstick fluidsynth Enable support for media-sound/fluidsynth easytag nautilus Build gnome-base/nautilus extension ecasound lv2 Add support for Ladspa V2 oil Use dev-libs/liboil for inner loop optimizations elisa mpris Enable MPRIS support vlc Use media-video/vlc for output rather than dev-qt/qtmultimedia exaile scrobbler Enable audioscrobbler/last.fm support fapg xspf Enable support for saving XSPF playlists. fluidsynth network enable network support (requires BSD sockets) gimmix cover Enable cover art fetching lyrics Enable lyric fetching gmpc unique Enable single instance support using dev-libs/libunique xspf Enable support for reading and saving XSPF playlists gmusicbrowser extras Install some extra deps for plugins (ex. Titlebar) guitarix lv2 Build lv2 plugins nsm Build NSM (Non Session Manager) support standalone Build standalone application herrie http Enable http streaming xspf Enable support for reading and saving XSPF playlists hydrogen archive Use libarchive instead of libtar portmidi Add portmidi support jack-audio-connection-kit pam Add basic realtime configuration via sys-auth/realtime-base jack2 classic Enable building of jackd metadata Enable metadata API pam Add basic realtime configuration via sys-auth/realtime-base jalv gtk2 Adds support for GTK+2 in addition to GTK+3 controlled by the gtk useflag. gtkmm Adds support for dev-cpp/gtkmm: C++ interface for GTK+2 kid3 acoustid Build acoustic fingerprinting plugin using media-libs/chromaprint mpris Enable support for MPRIS2 interface using dev-qt/qtdbus klick rubberband Enable rubberband support lame frontend Build and install the 'lame' executable frontend to lame libraries. mp3rtp Build the mp3-to-RTP streaming utility. **UNSUPPORTED** lilypond guile2 Enable experimental support for Guile 2 linuxsampler lv2 Add support for Ladspa V2 sf2 Add support for SoundFont 2 sound bank files lmms fluidsynth Enables Fluidsynth MIDI software synthesis plugin. libgig Enables GIG player plugin. soundio Enables libsoundio support. stk Enables STK Mallet plugin. vst Enables the VeSTige plugin to run VST plugins through Wine. loudness-scanner mpg123 build the mpg123 plugin musepack build the musepack plugin sndfile build the sndfile plugin mangler espeak Text to speech engine g15 Logitech g15 lcd support mixxx hid Enable HID controller support lv2 Add support for Ladspa V2 via media-libs/lilv shout Enable broadcasting support via media-libs/libshout moc cache Enable tags caching support sid Build with SID (Commodore 64 Audio) support tremor Build vorbis support using an integer implementation of the vorbis library (media-libs/tremor) mp3blaster sid Build with SID (Commodore 64 Audio) support mpd cdio Use libcdio for ISO9660 parsing support chromaprint Enable ChromaPrint / AcoustID support cue Enable CUE sheet support curl Support for web stream listening eventfd Use the eventfd function in MPD's event loop faad Use external faad library for AAC decoding fifo Support writing audio to a FIFO fluidsynth Enables Fluidsynth MIDI software synthesis (discouraged) gme Enables support for media-libs/game-music-emu for playing various video game music formats. id3tag Support for ID3 tags inotify Use the Linux kernel inotify subsystem to notice changes to mpd music library lame Support for MP3 streaming via Icecast2 libmpdclient Enable support for remote mpd databases libsoxr Enable the libsoxr resampler mpg123 Enable support for mp3 decoding over media-sound/mpg123 network Enables network streaming support nfs Enable support for the Network File System pipe Support writing audio to a pipe qobuz Build plugin to access qobuz recorder Enables output plugin for recording radio streams sid Build with SID (Commodore 64 Audio) support signalfd Use the signalfd function in MPD's event loop soundcloud Build plugin to access soundcloud systemd Enable support for systemd socket activation tidal Build plugin to access tidal twolame Support twolame MPEG-2 encoding webdav Enable using music from a WebDAV share wildmidi Enable MIDI support via wildmidi mpfc wav Enable wav audio codec support mpg123 int-quality Use rounding instead of fast truncation for integer output, where possible mumble g15 Enable support for the Logitech G15 LCD (and compatible devices). rnnoise Enable alternative noise suppression option based on RNNoise. speech Enable text-to-speech support in Mumble. murmur ice Use dev-libs/Ice to enable remote control capabilities. musescore omr Enable PDF import (OMR - optical music recognition) osc Enable OSC remote control protocol portmidi Enable support for building against media-libs/portmidi sf3 Enable SoundFont 3 support using media-libs/libvorbis sfz Enable experimental SFZ sampler webengine Use dev-qt/qtwebengine for embedded web browser ncmpc async-connect Enable asynchronous connect chat-screen Enable the chat screen help-screen Enable the help screen key-screen Enable key editor screen library-screen Enable library screen lyrics-screen Enable lyrics screen mouse Enable curses getmouse support outputs-screen Enable the outputs screen search-screen Enable search screen song-screen Enable song viewer screen ncmpcpp clock Enable clock screen outputs Enable outputs screen visualizer Enable visualizer screen with sound wave/frequency spectrum modes patchage jack-dbus Use Jack via D-Bus instead of libjack session Include experimental Jack session management (save/restore) support picard discid Enable reading the ID of the inserted CD fingerprints Enable calculation and lookup of AcoustID fingerprints pithos keybinder Use keybinder to enable global key bindings pms regex Enable regular expression searches pragha glyr Enable music metadata searchengine support using media-libs/glyr grilo Play songs on DLNA servers using media-libs/grilo keybinder Enable shortcut support using dev-libs/keybinder koel Append music on Koel server lastfm Enable last.fm support using media-libs/libclastfm peas Enable various plugins that will pull in dev-libs/libpeas as a dependency playlist Enable enhanced playlist support using dev-libs/totem-pl-parser rygel Share music on DLNA using net-misc/rygel soup Search metadata on AcoustID and radios on TuneIn using net-libs/libsoup pulseaudio X Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag. alsa-plugin Request installing media-plugins/alsa-plugins with PulseAudio plugin enabled. This ensures that clients supporting ALSA only will use PulseAudio. asyncns Use libasyncns for asynchronous name resolution. doc Build the doxygen-described API documentation. elogind Use sys-auth/elogind for giving each session a PA client equalizer Enable the equalizer module (requires sci-libs/fftw). gconf Ensure gnome-base/gconf is present for pulseaudio GConf to GSettings module automatic migration (keeping the user configuration) gdbm Use sys-libs/gdbm to store PulseAudio databases. Recommended for desktop usage. This flag causes the whole package to be licensed under GPL-2 or later. glib Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs. Build the GSettings PA module. native-headset Build with native HSP backend for bluez 5. ofono-headset Build with oFono HFP backend for bluez 5, requires net-misc/ofono. oss Enable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all. realtime Makes PulseAudio use RealtimeKit (sys-auth/rtkit) to get real-time priority while running. ssl Use dev-libs/openssl to provide support for RAOP (AirPort) streaming. system-wide Allow preparation and installation of the system-wide init script for PulseAudio. Since this support is only supported for embedded situations, do not enable without reading the upstream instructions at https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User /WhatIsWrongWithSystemWide/ . systemd Build with sys-apps/systemd support to replace standalone ConsoleKit. webrtc-aec Uses the webrtc.org AudioProcessing library for enhancing VoIP calls greatly in applications that support it by performing acoustic echo cancellation, analog gain control, noise suppression and other processing. pulseaudio-modules-bt fdk AAC encoding support using media-libs/fdk-aac ffmpeg APTX, APTX-HD encoding support ldac LDAC encoding support, using media-libs/libldac native-headset Build with native HSP (Headset Profile) headset for bluez 5 ofono-headset Build with oFono HFP (Hands Free Profile) headset for bluez 5, requires net-misc/ofono. pulseeffects bs2b Enable use of media-libs/libbs2b calf Enable use of media-plugins/calf for adding various FX mda-lv2 Enable use of media-plugins/mda-lv2 for the loudness FX rubberband Enable usse of media-libs/rubberband for the pitch shifting FX qmidiarp lv2 Enables Ladspa V2 plugins. qmmp analyzer Enable visual analyzer archive Enable archiving plugin via app-arch/libarchive. bs2b Enable Bauer stereophonic-to-binaural headphone filter cover Enable album cover support crossfade Enable crossfade effect when switching tracks cue enable CUE sheet parsing dbus Enable DBus notifiications and MPRIS support enca Detects the character encoding automatically game Enable Game music support gnome Enable Gnome hotkey support (requires Qt5DBus) lyrics Fetch track lyrics from the web midi Enable midi support using wildmidi library notifier Enable qmmps' notifier system projectm Enable projectm music visualization plugin qsui Enable QMMP simple UI qtmedia Enable playback via dev-qt/qtmultimedia scrobbler Enable audioscrobbler/last.fm support shout Enable shoutcast plug-in via media-libs/libshout. sid Build with SID (Commodore 64 Audio) support sndfile Enable wav playback support via media-libs/libsndfile soxr Use the SoX resampling library stereo Enable stereo effect tray Build tray icon qsampler libgig Enable libgig support for loading Gigasampler files and DLS (Downloadable Sounds) Level 1/2 files qtractor aubio Enable media-libs/aubio support dssi Enable support for DSSI Soft Synth Interface rubberband Enable support for in-place audio clip pitch-shifting through the rubberband library rhythmbox daap Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing shntool alac Add support for Apple Lossless Audio Codec files mac Add support for Monkey's Audio files shorten Add support for the shorten audio compressor snapcast client Build and install Snapcast client component server Build and install Snapcast server component tremor Build with TREMOR version of vorbis snd s7 Enable the s7 extension language (a version of Scheme) sonic-visualiser id3tag Enables ID3 tagging with id3tag library sox amr Enables Adaptive Multi-Rate Audio support id3tag Enables ID3 tagging with id3tag library twolame Enables twolame support (MPEG Audio Layer 2 encoder) split2flac enca Try to guess the charset using enca flake Add support for Flake, alternative FLAC encoder mac Add support for Monkey's Audio files replaygain Support for Replay Gain metadata, for relative volume adjustment spotify pax_kernel Triggers a paxmarking of the main Spotify binary pulseaudio Controls the dependency on pulseaudio or apulse systray Pulls in dependencies needed for systray support on some desktop environments supercollider emacs Enable the SCEL user interface gedit Enable the SCED user interface gpl3 Build GPL-3 licensed code (recommended) server Build with internal server vim Enable the SCVIM user interface webengine Enable the internal help system using QtWebengine teamspeak-server tsdns Install TeamSpeaks own DNS service for handling multiple virtual servers. tomahawk telepathy Enable support for the real-time communication framework telepathy umurmur mbedtls Use net-libs/mbedtls as TLS provider shm Enable shared memory support upmpdcli thirdparty Enable streaming from Qobuz and Tidal external services vimpc boost Use boost instead of C++11 libraries vorbis-tools kate Adds support for Ogg Kate subtitles via libkate. ogg123 Build ogg123 player, needs libao and curl wildmidi player Install the wildmidi player xmms2 airplay Support for airplay format asf Support for Monkey's Audio (APE) format with help of bundled libasf fluidsynth Enable fluidsynth support (MIDI) ices Icecast source output plugin mac Support for Monkey's Audio (APE) format with help of media-sound/mac mlib-update Enable building of xmms2-mlib-updater client ofa Support for Open Fingerprint Architecture (OFA) phonehome This client sends anonymous usage-statistics to the xmms2 server Build xmms2 player daemon (otherwise only clients are built) sid Support for C64 SID valgrind Run unit tests under valgrind. vocoder Phase vocoder effect plugin xml Enable support for various XML based playlists and sources: RSS, XSPF xnoise lastfm Enable support for lastfm cover art fetching and scrobbling lyrics Enable support for lyrics fetching xwax alsa Adds support for ALSA audio input/output. cdda Sets runtime dependencies to support decoding audio from a compact disc. fallback Sets runtime dependencies to support decoding "other" audio files. mp3 Sets runtime dependencies to support decoding MP3 audio. oss Adds support for OSS (open sound system) audio input/output. yarock mpv Enable media-video/mpv backend phonon Enable media-libs/phonon backend vlc Enable media-video/vlc backend yoshimi lv2 Add support for Ladspa V2 zynaddsubfx dssi Enable support for DSSI Soft Synth Interface media-tv kodi airplay enable AirPlay support bluray Enable playback of Blu-ray filesystems cec Enable support for HDMI-CEC devices via libcec dvd Enable optical (CD/DVD drive) support gbm Use the Graphics Buffer Manager for EGL on KMS. gles Enable support for GLES libusb Use virtual/libusb for usb device hotplug support. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev. lirc Enable support for controlling Totem with a remote control using app-misc/lirc mariadb Add MariaDB support nfs Enable NFS client support raspberry-pi Enable support for the Raspberry Pi system-ffmpeg Use system ffmpeg instead of the bundled one udev Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness. udf Enable UDF support. Required for playing blurays. webserver Enable internal webserver xslt Enable XSLT support using dev-libs/libxslt linuxtv-dvb-apps alevt Build videotext decoder mythtv alsa Allows MythTV to directly output sound to ALSA devices asi Support for DVEO ASI recorder autostart Use a custom autostart configuration bluray Use the system libbluray for BluRay support cec Allows control of CEC enabled TVs via HDMI ceton Ceton InfiniTV 4 a CableCARD-enabled tuner support debug Instructs Qt to use the 'debug' target egl EGL video output support fftw Support visualizations via sci-libs/fftw hdhomerun Silicondust USA Inc.network-attached tuner support hdpvr Hauppauge HD-PVR? ieee1394 Firewire enabled Cable boxe support ivtv Support kernel driver for the iTVC15 family of MPEG codecs jack Allows MythTV to use JACK as your sound output device java BD-J support for Blu-ray discs lcd Enable use of app-misc/lcdproc data display lirc LIRC remote control device support nvdec Enable NVDEC (NVCUVID) hardware accelerated video decoding perl Build the perl bindings for MythTV vbox V@Box Communications network-attached tuner devices support vpx Enable VP8/VP9 support for media-libs/libvpx wrapper Use Ubuntu mythtfrontend wrapper x265 Enable h265 encoding using x265 xmltv Support media-tv/xmltv TV listing - not used by Schedules Direct] xnvctrl External XNVCtrl support using Nvidia proprietary driver tvheadend capmt Enable support for capmt (dvbapi) protocol constcw Enable support for the constcw protocol cwc Enable support for the cwc (newcamd) protocol ddci Enable support for DDCI hardware dvbcsa Enable decryption of the DVB Common Scrambling Algorithm dvben50221 Enable support for hardware CAM hdhomerun Enable support for the HDHomeRun device imagecache Enable support for image caching iptv Enable support for Internet Protocol TV satip Enable support for IP-based Satellite TV timeshift Enable TimeShift support uriparser Use dev-libs/uriparser vpx Enable transcoding with the VP8/VP9 video codecs x264 Enable transcoding with the H.264 video codec x265 Enable transcoding with the HEVC video codec xmltv Use media-tv/xmltv v4l-dvb-saa716x firmware Install firmware v4l-utils bpf Enables support for IR BPF decoders. xmltv ar Argentina tv listing grabber ch-search Grabber for Switzerland dk Denmark tv listing grabber dtvla Latin America digital tv listing grabber es-laguiatv Spain alternative grabber eu-dotmedia Grabber for Europe (xmltv.se / dotmedia) eu-epg EPG grabber for some European countries. eu-epgdata include fanart URLs for some European countries. eu-xmltvse Grabbber for Europe [replaces eu-dotmedia and se-tvzon] fi Finland tv listing grabber (0.6.1 add ampparit telsu) fi-sv Grabber for Finland (Swedish) fr France tv listing grabber fr-kazer France (Kazer) tv listing grabber huro Hungarian tv listing grabber il Israel tv listing grabber is Iceland tv listing grabber it Italy tv listing grabber (RUV) na-dd North America tv listing grabber na-dtv North America Direct TV grabber na-tvmedia Grabber for North America (TVMedia) nl Netherlands tv listing grabber [REMOVED 0.6.1] no-gf Norway Gfeed tv listing grabber pt-meo Grabber for Portugal (MEO) pt-vodafone Grabber for Portugal (Vodafone) se-swedb Sweden tv listing grabber se-tvzon Sweden (tvzon.se) tv listing grabber tr Turkey (Digiturk) tv listing grabber tv-check enable GUI checking tv-combiner enable grabbers combiner tv-pick-cgi enable CGI support uk-bleb Britain tv listing grabber uk-tvguide UK and Ireland tv listing grabber using TV Guide website zz-sdjson Grabber for schedulesDirect.org SD-JSON service (many countries) zz-sdjson-sqlite Grabber for schedulesDirect.org SD-JSON service (sqlite DB) media-video aegisub uchardet Enable charset discovery via app-i18n/uchardet aravis fast-heartbeat Enable faster heartbeat rate. gstreamer Build the GStreamer plugin. packet-socket Enable packet socket support. viewer Build the GTK+-based video viewer. avidemux nvenc Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards. chaplin transcode Enable DVD ripping and transcoding clive clipboard Support reading from X clipboard pager Support pager!? password Support password controlled sites dv2sub kino install kino plugin dvdrip fping Enables fping support for cluster rendering subtitles Enables support for subtitle ripping ffdiaporama openclipart Support openclipart database texturemate Install extra backgrounds ffmpeg amr Enables Adaptive Multi-Rate Audio support amrenc Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc. appkit Enables Apple AppKit framework bluray Enable playback of Blu-ray filesystems bs2b Enables media-libs/libbs2b based Bauer stereo-to-binaural filter. cdio Enables audio CD grabbing with dev-libs/libcdio. chromaprint Enables audio fingerprinting support with media-libs/chromaprint. chromium Builds libffmpeg.so to enable media playback in Chromium-based browsers like Opera and Vivaldi. codec2 Enables codec2 low bit rate speech codec support via media-libs/codec2. cpudetection Enables runtime CPU detection (useful for bindist, compatibility on other CPUs) cuda Enables CUDA-based acceleration. Mostly used for specific filters. dav1d Enables AV1 decoding via media-libs/dav1d. fdk Use external fdk-aac library for AAC encoding flite Adds a text-to-speech filter based on app-accessibility/flite. frei0r Enable frei0r wrapping in libavfilter fribidi Enables fribidi support in the drawtext filter. gcrypt Enables gcrypt support: Needed for rtmp(t)e support if openssl, librtmp or gmp is not used. gme Enables support for media-libs/game-music-emu for playing various video game music formats. gpl Build GPL code. Should be enabled unless you require LGPL binaries. hardcoded-tables Use pre-calculated tables rather than calculating them on the fly. iec61883 Support for FireWire DV/HDV input device using media-libs/libiec61883. kvazaar Enables media-libs/kvazaar based HEVC encoder. libaom Enables media-libs/libaom based AV1 codec support. libaribb24 Enables ARIB text and caption decoding via media-libs/aribb24. libdrm Enables x11-libs/libdrm support for better screen grabbing and hardware accelerated codecs. libilbc Enables iLBC de/encoding via media-libs/libilbc. librtmp Enables Real Time Messaging Protocol using librtmp (media-video/rtmpdump) in addition to FFmpeg's native implementation. libsoxr Enables audio resampling through media-libs/soxr. libtesseract Enables the OCR filter via app-text/tesseract. libv4l Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library. libxml2 Uses dev-libs/libxml2 to enable dash demuxing support. lv2 Enables lv2 audio filter wrapper. mipsdspr1 Enables MIPS DSP ASE R1 optimizations. mipsdspr2 Enables MIPS DSP ASE R2 optimizations. mipsfpu Enables floating point MIPS optimizations. mmal Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi. network Enables network streaming support opencl Enable OpenCL support openh264 Enables H.264 encoding suppoprt via media-libs/openh264. openssl Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS). pic Force shared libraries to be built as PIC (this is slower) postproc Build and install libpostproc. rav1e Enables AV1 encoding support via media-video/rav1e. rubberband Adds time-stretching and pitch-shifting audio filter based on media-libs/rubberband. snappy Enable app-arch/snappy support. Required for e.g. Vidvox Hap encoder. srt Enable support for Secure Reliable Transport (SRT) via net-libs/srt ssh Enable SSH/sftp support via net-libs/libssh. twolame Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder. vidstab Enables video stabilization filter using vid.stab library (media-libs/vidstab). vpx Enables VP8 and VP9 codec support using libvpx: Decoding does not require this to be enabled but libvpx can also be used for decoding; encoding requires this useflag to be enabled though. vulkan Enables support for the vulkan API for GPU offload. x265 Enables HEVC encoding with media-libs/x265. zeromq Enables net-libs/zeromq support with the zmq/azmq filters. zimg Enables media-libs/zimg based scale filter. zvbi Enables media-libs/zvbi based teletext decoder. ffmpeg2theora kate Adds support for Ogg Kate subtitles via libkate. google2srt html Install HTML documentation guvcview qt5 Build with Qt5 interface instead Gtk+ handbrake fdk Support for encoding AAC using media-libs/fdk-aac. gstreamer Support for the streaming media framework from media-libs/gstreamer. gtk Install the GTK UI, ghb. libav-aac Support for encoding AAC using libav's internal encoder. numa Adds support for x265's NUMA capabilities. nvenc Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards. x265 Support for encoding h265 using media-libs/x265. kino gpac Enable GPAC support when exporting to 3GPP format kmplayer npp Compile the npp backend that plays xembed style browser plugins. libva-utils drm Enables VA/DRM API support. mjpegtools sdlgfx Enables y4mhist to display a graphical histogram mjpg-streamer input-control Plugin giving ability to control camera movement (only specific cameras) input-file Plugin that watches given directory and send it's content input-testpicture Plugin for sending compiled in, test pictures input-uvc Plugin that sends video stream from UVC compatible camera output-autofocus Auto focusing plugin output-file Plugin that saves received content under given location output-http Small HTTP server plugin which sends WWW directory content and streams image content output-rtsp Plugin which provides a mechanism to take snapshots with a trigger from a UDP packet output-udp Plugin receiving content over UDP and storing to a directory www Installs WWW content motion mariadb Add mariadb database support mmal Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi. supervise-daemon Add experimental suppport for OpenRC's supervise-daemon process supervision motiontrack multiprocess Enables multi-process support (SMP/cluster) for motiontrack programs mplayer bl Blinkenlights video output bluray Enable playback of Blu-ray filesystems bs2b Enable Bauer stereophonic-to-binaural headphone filter cdio Use libcdio for CD support (instead of cdparanoia) cdparanoia Enable cdparanoia (audio CD ripper) support cpudetection Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs) dvdnav Use forked libdvdnav, navigate menus in GUIs enca Enables support for charset discovery and conversion faac Use external faac library for AAC encoding faad Use external faad library for AAC decoding libmpeg2 Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg. live Enables live.com streaming media support md5sum Enables md5sum video output mng MNG input support network Enables network streaming support nut Enables support for the NUT container format osdmenu Enables support for on-screen display (OSD) menus pnm Add PNM video output option, to create PPM/PGM/PGMYUV images pvr Enable Video4Linux2 MPEG PVR radio Enable V4L2 radio interface and support rar Enable Unique RAR File Library rtc Enables usage of the linux real time clock. The alternative is software emulation of rtc rtmp Enables RTMPDump Streaming Media support shm Enable support for shm tga Enables Targa video output toolame Enable toolame MPEG-2 encoding tremor Enable internal support for Vorbis twolame Enable twolame MPEG-2 encoding vcd Enables VCD support vidix Support for vidix video output yuv4mpeg Enables yuv4mpeg video output zoran Enables ZR360[56]7/ZR36060 video output mpv archive Enable support for various archive formats via app-arch/libarchive bluray Enable playback of Blu-ray filesystems cli Build mpv CLI player cplugins Enable C plugins support cuda Enable hardware video decoding via Nvidia CUDA drm Enable Kernel Mode Setting / Direct Rendering Manager based video output egl Enable support for various EGL-based video outputs / backends gamepad Enable gamepad input support gbm Enable Graphics Buffer Manager based EGL video backend jpeg Enable support for saving screenshots in JPEG format libass Enable OSD (On Screen Display) and subtitles support via media-libs/libass libmpv Build mpv shared library lua Enable Lua scripting, OSC (On Screen Controller) GUI and net-misc/youtube-dl hook-script opengl Enable support for various OpenGL-based video backends raspberry-pi Enable support for the Raspberry Pi rubberband Enable high quality pitch correction via media-libs/rubberband sdl Enable media-libs/libsdl2 based video and audio outputs (Note: these outputs exist for compatibility reasons only, avoid if possible) tools Install extra tools: mpv_identify.sh, mpv_idet.sh, and umpv uchardet Enable subtitles charset discovery via app-i18n/uchardet vulkan Enable support for various Vulkan-based video backends zimg Enable libzimg support (for vf_fingerprint) noad libmpeg2 Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg nvidia_video_sdk tools Build and install example tools. obs-studio fdk Enable libfdk support for AAC encoding. imagemagick Use ImageMagick for image loading instead of FFmpeg. luajit Build support for scripting via Luajit. nvenc Enable NVENC encoding for nVidia video cards. python Build support for scripting via Python 3. speex Enable noise suppression filter support via media-libs/speexdsp. ssl Build support for TLS/SSL connections (RTMPS) via net-libs/mbedtls. vlc Build support for using media-video/vlc as a media source. ogmrip ogm Support for OGM container format srt Support for SRT subtitle format orion mpv Use the media-video/mpv player (upstream default) qtav Use the media-libs/qtav player qtmedia Use the dev-qt/qtmultimedia peek keybinder Enable support for global hotkeys using dev-libs/keybinder pipewire jack Enable SPA JACK plugin and emulation to be able to run JACK applications on top of PipeWire pulseaudio Enable emulation to be able to run PulseAudio applications on top of PipeWire vulkan Enable vulkan spa plugin integration qmplay2 audiofilters Build with AudioFilters module avdevice Build FFmpeg module with libavdevice suport avresample Use libavresample instead of libswresample cdio Build with AudioCD module cuvid Build with CUVID module extensions Build with Extensions module and enable other plugins gme Build Chiptune with GME support inputs Build with Inputs module lastfm Build with LastFM support libass Build with SSA/ASS subtitles rendering support lyrics Build with lyrics support mediabrowser Build with MediaBrowser support mpris2 Build Extensions with MPRIS2 support notifications Build additional notifications module shaders Compile Vulkan shaders using media-libs/shaderc sid Build Chiptune with SIDPLAY support videofilters Build with VideoFilters module visualizations Build with Visualizations module vulkan Build with Vulkan support rav1e capi Build the C-API library and header file rtmpdump gnutls Use GnuTLS instead of OpenSSL for Cryptography libressl Use LibreSSL instead of OpenSSL for Cryptography ssl Enable Cryptographic features tools Enable installation of various binary tools in addition to librtmp library simplescreenrecorder asm Enable x86 assembly optimisation. vpx Enable VP8 codec support via media-libs/libvpx. smplayer autoshutdown Enable the option to shutdown your computer after finishing the playlist. This requires dev-qt/qtdbus as dependency. mpris Enable support for MPRIS2 (Media Player Remote Interfacing Specification, version 2), a DBus interface for remote control, which requires dev-qt/qtdbus as dependency. subtitlecomposer mpv Build mpv backend support totem python Build dev-lang/python using plugins (dbusservice for notifications and MPRIS control, interactive python console and opensubtitles lookup) transcode mjpeg Enables mjpegtools support nuv NuppelVideo container format demuxing pic disable optimized assembly code that is not PIC friendly postproc Build with ffmpeg libpostproc support vdr alternatechannel Use alternate channel on record bidi fribidi support, for languages, written from right to left demoplugins Install demo and example plugins coming with vanilla vdr graphtft support for vdr-graphtft plugin up from version 0.1.7 html Install HTML documentation keyboard enable keyboard support as remote device mainmenuhooks Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...) menuorg Enables support for the media-plugins/vdr-menuorg menuselection adds support for menu hotkeys of double digits naludump Removes NALU fill data from h.264-Streams of TS files permashift permanent timeshift by recording live TV into RAM, need plugin media-plugins/vdr-permashift pinplugin Support for media-plugins/vdr-pin resumereset rreset resume of EOF ttxtsubs support for media-plugins/vdr-ttxtsubs verbose enable full output on compile vlc X Enable support for e.g. fullscreen mode via X and the X C-language binding. It does not build a graphical interface aom Enable AV1 encoding/decoding support using media-libs/libaom archive Enable support for libarchive stream extractor aribsub Enable support for decoding ARIB STD-B24 subtitles bluray Enable libbluray for Blu-ray disc support chromaprint Enable libchromaprint for Chromaprint based audio fingerprinter support chromecast Enable experimental support for Google Chromecast dav1d Enable support for media-libs/dav1d AV1 decoder dc1394 Enable IIDC cameras support directx Enable Win32 DirectX, D3D11va and DxVA2 support dvbpsi Enable support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi encode Enable streaming-output support and videolan manager to control multiple streams from within one instance faad Enable AAC audio decoding library support via media-libs/faad2 fdk Enable the Fraunhofer AAC codec library fluidsynth Enable Fluidsynth MIDI software synthesis (with external sound fonts) gcrypt Enable cryptography support via libgcrypt gme Enable support for media-libs/game-music-emu for playing various video game music formats gstreamer Enable GStreamer based decoding support (currently supports only video decoding) kate Adds support for Ogg Kate subtitles via libkate kms Enable kernel mode setting video output plugin via x11-libs/libdrm libplacebo Enable support for GPU accelerated video rendering with media-libs/libplacebo libtar Uses libtar instead of the built-in tar reader for reading custom skins libtiger Enable Ogg Kate subtitles rendering using libtiger linsys Enable support for Linux Linear Systems Ltd. SDI and HD-SDI input cards live Enable live555 streaming media support (client support for rtsp) loudness Enable loudness normalisation according to the EBU R128 standard using media-libs/libebur128 lua Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things macosx-notifications Enable Mac OS X notifications module (formerly growl) matroska Enable matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg) mpeg Add libmpeg2 support for mpeg-1 and mpeg-2 video streams nfs Enable support for nfs protocol via net-fs/libnfs omxil Enable OpenMAX Integration Layer codec module optimisememory Enable optimisation for memory rather than performance projectm Enable the projectM visualization plugin run-as-root Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it! sdl-image Enable sdl image video decoder (depends on sdl) sftp Enable libssh2 to support SFTP file transfer shout Enable libshout output sid Adds support for playing C64 SID files through media-libs/libsidplay:2 skins Enable support for the skins2 interface soxr Enable SoX Resampler support via media-libs/soxr srt Enable support for Secure Reliable Transport (SRT) via net-libs/srt tremor Enable tremor, a fixed-point version of the Ogg Vorbis decoder twolame Enable twolame support (MPEG Audio Layer 2 encoder) upnp Enable support for the Intel SDK stack based UPnP discovery module instead of CyberLink vpx Enable the decoder(s) from the WebM VP8 / VP9 Codec SDK x265 Support X265 Encoder zeroconf Enable support for zero-configuration networking via avahi zvbi Enable support for teletext subtitles via the zvbi library webcamoid headers Install development headers libuvc Build with libuvc support qtaudio Enable audio capture/play via dev-qt/qtmultimedia v4lutils Build with V4L-utils support videoeffects Build video effects x264-encoder avs enable AvxSynth support in the AviSynth input module ffmpegsource Enable ffmpegsource aka ffms support, disables lavf interlaced Enable interlaced encoding support, this can decrease encoding speed by up to 2% xine-ui vdr Enables Video Disk Recorder support net-analyzer 2ping server Install the server init scripts. argus libtirpc Build against net-libs/libtirpc for RPC support argus-clients ft Enable support for flow packets through net-analyzer/flow-tools barnyard sguil Enable sguil (The Analyst Console for Network Security Monitoring) support barnyard2 gre Enable GRE support mpls Enable support for mpls networks sguil Enable sguil (The Analyst Console for Network Security Monitoring) support bwm-ng csv Enable csv output html Enable html output cacti doc install html documentation check_mk_agent apache_status Install check_mk-agent apache-status plugin. inventory Install check_mk-agent linux inventory plugin. logwatch Install check_mk-agent logwatch plugin. mysql Install check_mk-agent mysql plugin. nfsexports Install check_mk-agent nfsexports plugin. postgres Install check_mk-agent postgres plugin. smart Install check_mk-agent S.M.A.R.T plugin. zypper Install check_mk-agent zypper plugin. echoping http enable support for http protocol. icp enable support for ICP (used to monitor proxies). priority enable socket priority support. smtp enable support for SMTP protocol. tos enable support for TOS (TYpe Of Service). ettercap plugins Install ettercap plugins (et_*.so) flent plots Enable drawing plots flowgrind pcap Enable packet capturing support using net-libs/libpcap fprobe messages enable console messages goaccess btree Enable Tokyo Cabinet's on-disk B+ Tree database backend geoipv2 Enable support for GeoIP2 through dev-libs/libmaxminddb getline Use GNU getline() to parse full line requests tokyocabinet Enable Tokyo Cabinet's on-memory hash database backend gr-fosphor glfw enable GLFW based interface graphite-web carbon Enable carbon support memcached Enable memcached support greenbone-security-assistant extras Pdf results, extra fonts, html docs support gvm cli Command Line Interface for OpenVAS Scanner cron A cron job to update GVM's vulnerability feeds daily extras Extra fonts, pdf-results! and html docs support gsa Greenbone Security Assistant (WebUI) ospd Enable support for scanner wrappers gvm-libs extras Html docs support gvmd extras Html docs support hexinject experimental Install experimental packets.tcl tools Install hex2raw and prettypacket tools httping tfo Enable support for TCP Fast Open hydra gcrypt Enable radmin2 support through dev-libs/libgcrypt libssh Enable SSH support through net-libs/libssh mongodb MongoDB support through dev-libs/mongo-c-driver ncp NCP protocol (NetWare) support through ncpfs icinga2 console Adds support for line-editing in the console jumbo-build Combine source files to speed up build process, requires more memory lto Adds support for link time optimization mail Allows for mailing of alerts mariadb Enable support for the mariadb database backend nano-syntax Adds support for syntax used in the nano editor plugins Adds support for nagios plugins ipsumdump nanotimestamp Enable timestamps with nano-second resolution linkchecker sqlite Mozilla Bookmark parsing monitoring-plugins dns Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugins. fping Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugins. game Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugins. snmp Install dev-perl/Net-SNMP and net-analyzer/net-snmp required for monitoring SNMP values. Disabling the flag does not remove any plugins. ssh Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugins. mtr ipinfo Disable support for IP address lookups jansson Enable JSON output support through dev-libs/jansson munin asterisk Install the packages required for monitoring Asterisk. Disabling the flag does not remove any plugin files. cgi Install the CGI-compatible scripts for on-the-fly generation of web pages and graphs. This is only meaningful if the minimal USE flag is disabled. dhcpd Install dev-perl/Net-IP, dev-perl/HTTP-Date and net-misc/dhcp to monitor DHCP lease usage. This only works if the server is on the same system as the node, so the server is also brought in. Disabling the flag does not remove any plugin file. doc Build and install a local copy of the HTML documentation for the whole software. This requires dev-python/sphinx to process the documentation sources. http Install dev-perl/libwww-perl required for monitoring HTTP-based services such as Apache and nginx. Disabling the flag does not remove any plugin file. ipmi Install sys-apps/ipmitool required for monitoring IPMI sensors. Disabling the flag does not remove any plugin file. ipv6 Add support for IPv6 in munin-node. IPv6 support for the master is always enabled, but the node requires a newer version of dev-perl/Net-Server, capable of listening to IPv6 sockets. irc Install the packages required for monitoring IRC. Disabling the flag does not remove any plugin files. java Build the Java-based plugins to monitor JMX-compatible applications. Disabling the flag removes the jmx monitoring plugins. memcached Install the packages required for memcached monitoring. Disabling the flag does not remove any plugin files. minimal Only install munin-node and its plugins. This excludes the scripts to generate the web pages and the graphs. mysql Install the packages required for monitoring MySQL. Disabling the flag does not remove any plugin files. postgres Install the packages required for monitoring PostgreSQL. Disabling the flag does not remove any plugin files. syslog Configure the node by default to log on syslog. This requires the presence of virtual/perl-Sys-Syslog. As of version 2.0.2, the master scripts only log to file, and not to syslog. nagios-core classicui use the classic web theme lighttpd install www-servers/lighttpd config web enable web interface nagios-plugin-check_raid 3ware Support 3ware RAID controllers aacraid Support Adaptec AAC-RAID controllers dmraid Support Device-Mapper RAID hpa Support HP Array controllers hpsa Support HP SmartArray (CCISS) controllers megaraid-sas Support LSI MegaRAID SAS controllers megaraid-scsi Support LSI MegaRAID SCSI controllers mpt Support LSI MPT Fusion controllers mpt-sas2 Support LSI SAS-2 controllers nagios-plugins nagios-dns Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugin file. nagios-game Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugin file. nagios-ping Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugin file. snmp Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file. ssh Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file. nagios-plugins-flameeyes smart Install sys-apps/smartmontools required for S.M.A.R.T. disk monitoring. Disabling the flag removes the plugin file. This plugin also requires the sudo flag to be enable. nagios-plugins-linux-madrisan curl Build check_docker which requires net-misc/curl varlink Build check_podman which requires dev-libs/libvarlink net-snmp elf Enable the use of elf utils to check uptime on some systems kmem Enable usage of /dev/kmem mfd-rewrites Use MFD rewrites of mib modules where available netlink Use dev-libs/libnl to fetch TCP statistics instead of using /proc/net/tcp (Linux only). pcap Install snmppcap which reads from PCAP files and writes to the SNMP transport pci Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux. rpm Enable monitoring of app-arch/rpm. This flag requires the bzip2 and zlib flags to be enabled as well. smux Enable support for the legacy smux protocol (superseded by agentx) ucd-compat Build UCD compatibility library. Increases significantly the install size. netdata compression Enable compression via zlib dbengine Enable the Netdata database engine ipmi Install sys-apps/ipmitool required for monitoring IPMI sensors. jsonc Enable optimization of JSON using dev-libs/json-c kinesis Enable support for Amazon Kenesis as a backend lto Build with Link Time Optimization (LTO) mongodb Enable support for the mongodb backend nfacct Enable the nfacct plugin nodejs Enable use of nodejs (which some plugins use) prometheus Enable support for the Prometheus remote write backend tor Enable monitoring of tor xen Enable monitoring of xen netperf demo Emit interim results during the run. May affect results nfdump ftconv Build the flow-tools to nfdump converter nfprofile Build nfprofile used by NfSen nftrack Build nfprofile used by PortTracker readpcap Build nfcapd collector to read from pcap file instead ofnetwork data sflow Build sflow collector sfcpad nmap libssh2 Enable SSH support through net-libs/libssh2 ncat Install the ncat utility nmap-update Install nmap-update, which uses dev-vcs/subversion to update nmap scripts in your home directory nping Install the nping utility nse Include support for the Nmap Scripting Engine (NSE) system-lua Use dev-lang/lua instead of the bundled liblua nrpe command-args Build support for specifying the command-line arguments from the Nagios/Icinga master. Make sure you understand the implications of this flag as it can be a security risk. nsca crypt Build support for crypted communication with nsca, through dev-libs/libmcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment. minimal Only build and install the send_nsca command and not the daemon. This allows a very minimal install with no overhead when setting up a node. openvas-scanner cron Install a cron job to update GVM's feed daily. extras Html docs support ospd extras Html docs support ossec-hids agent Build "agent" installation target (see package description) hybrid Build "hybrid" installation target local Build "local" installation target server Build "server" installation target pinger gtk2 Install the gtkpinger GUI utility based on x11-libs/gtk+:2 gtk3 Install the gtkpinger GUI utility based on x11-libs/gtk+:3 pmacct 64bit Use 64bit counters instead of 32bit ones bgp-bins Link BGP daemon binaries bmp-bins Link BMP daemon binaries geoipv2 Enable support for GeoIP2 through dev-libs/libmaxminddb jansson Enable support for JSON through dev-libs/jansson kafka Enable support for Apache Kafka through dev-libs/librdkafka l2 Enable Layer-2 features and support mongodb Enable support for MongoDB through dev-libs/mongo-c-driver ndpi Enable support for nDPI through net-libs/nDPI nflog Enable support for NFLOG through uacctd plabel Enable IP prefix labels rabbitmq Enable support for RabbitMQ through net-libs/rabbitmq-c st-bins Link Streaming Telemetry daemon binaries traffic-bins Link IPv4/IPv6 traffic accounting binaries zmq Enable support for ZeroMQ through net-libs/zeromq pnp4nagios icinga Build against net-analyzer/icinga2 instead of net-analyzer/nagios-core nagios Build against net-analyzer/nagios-core (the default) prelude-lml tls Enables Prelude LML support Syslog through TLS using net-libs/gnutls. rrdcollect exec Enable exec:/// support librrd Use the librrd library from net-analyzer/rrdtool rrdtool graph Enable support for graphing functions rados Enable support for librados from sys-cluster/ceph rrdcgi Build rrdcgi support sancp sguil Enable sguil (The Analyst Console for Network Security Monitoring) support sarg doublecheck Make sarg double check the data it manipulates and output a warning if an error is found gd Enable support for graphs in reports through media-libs/gd glob Disable to ignore wildcards in file names pcre Enable support for regular expressions in the hostalias file through dev-libs/libpcre scanlogd nids Use net-libs/libnids for packet capturing pcap Use net-libs/libpcap for packet capturing smokeping dig Install net-dns/bind-tools for dig functionality echoping Install net-analyzer/echoping for echoping functionality ssh Install ssh functionality telnet Install dev-perl/Net-Telnet for telnet functionality sngrep eep Enable EEP packet send/receive support gnutls Use net-libs/gnutls to parse captured TLS packets openssl Use dev-libs/openssl to parse captured TLS packets snort active-response Enables support for automatically sending TCP resets and ICMP unreachable messages to terminate connections. Used with inline deployments. control-socket Enables Snort's control socket. file-inspect Enables extended file inspection capabilities. flexresp3 Enables support for new flexable response preprocessor for enabling connection tearing for inline deployments. Replaces flexresp and flexresp2. gre Enable support for inspecting and processing Generic Routing Encapsulation (GRE) packet headders. Only needed if you are monitoring GRE tunnels. high-availability Enables high-availability state sharing. inline-init-failopen Enables support to allow traffic to pass (fail-open) through inline deployments while snort is starting and not ready to begin inspecting traffic. If this option is not enabled, network traffic will not pass (fail-closed) until snort has fully started and is ready to perform packet inspection. large-pcap-64bit Allows Snort to read pcap files that are larger than 2 GB. ONLY VALID FOR 64bit SYSTEMS! libtirpc Build against net-libs/libtirpc for RPC support linux-smp-stats Enable accurate statistics reporting through /proc on systems with multipule processors. non-ether-decoders Enable decoding of non-ethernet protocols such as TokenRing, FDDI, IPX, etc. open-appid Enable OpenAppID, an open, application-focused detection language and processing module for Snort that enables users to create, share, and implement application detection. Requires dev-lang/luajit. perfprofiling Enables support for preprocessor and rule performance profiling using the perfmonitor preprocessor. ppm Enables support for setting per rule or per packet latency limits. Helps protect against introducing network latency with inline deployments. react Enables support for the react rule keyword. Supports interception, termination, and redirection of HTTP connections. reload-error-restart Enables support for completely restarting snort if an error is detected durring a reload. shared-rep Enables the use of shared memory for the Reputation Preprocessor (Only available on Linux systems) side-channel Enables Snort's the side channel. sourcefire Enables Sourcefire specific build options, which include --enable-perfprofiling and --enable-ppm. suricata af-packet Enable AF_PACKET support bpf Enable support for eBPF (as well as XDP if supported by the kernel and the NIC driver) for low-level, high-speed packet processing control-socket Enable unix socket cuda Enable NVIDIA Cuda computations support detection Enable detection modules logrotate Install logrotate rule lz4 Enable support for compressed pcap logging using the LZ4 algorithm nflog Enable libnetfilter_log support nfqueue Enable NFQUEUE support for inline IDP redis Enable Redis support symon perl Enables a generic perl symux client symon Enables the system monitor. Offers no functionality but monitoring and forwarding of measured data symux Enables the multiplexer which stores incoming symon streams on disk in RRD (net-analyzer/rrdtool) files tcpdump drop-root Drop privileges to tcpdump:tcpdump when run as root smi Build with net-libs/libsmi to load MIBs on the fly to decode SNMP packets tcpreplay pcapnav Enable if you want the jump to byte offset feature via net-libs/libpcapnav tcpdump Use net-analyzer/tcpdump for packet decoding feature testssl bundled-openssl Install precompiled versions of OpenSSL for greater testing coverage tracebox curl Build the curl component for uploading capture files using net-misc/curl sniffer Build the sniffer component using net-libs/libnetfilter_queue wapiti kerberos Support Kerberos authentication ntlm Support NTLM authentication wireshark androiddump Install androiddump, an extcap interface to capture from Android devices bcg729 Use media-libs/bcg729 for G.729 codec support in RTP Player brotli Use app-arch/brotli for compression/decompression capinfos Install capinfos, to print information about capture files captype Install captype, to print the file types of capture files ciscodump Install ciscodump, extcap interface to capture from a remote Cisco router dftest Install dftest, to display filter byte-code, for debugging dfilter routines dpauxmon Install dpauxmon, an external capture interface (extcap) that captures DisplayPort AUX channel data from linux kernel drivers dumpcap Install dumpcap, to dump network traffic from inside wireshark editcap Install editcap, to edit and/or translate the format of capture files http2 Use net-libs/nghttp2 for HTTP/2 support ilbc Build with iLBC support in RTP Player using media-libs/libilbc libxml2 Use dev-libs/libxml2 for handling XML configuration in dissectors lto Enable link time optimization maxminddb Use dev-libs/libmaxminddb for IP address geolocation mergecap Install mergecap, to merge two or more capture files into one minizip Build with zip file compression support netlink Use dev-libs/libnl pcap Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark) plugin-ifdemo Install plugin interface demo plugins Install plugins randpkt Install randpkt, a utility for creating pcap trace files full of random packets randpktdump Install randpktdump, an extcap interface to provide access to the random packet generator (randpkt) reordercap Install reordercap, to reorder input file by timestamp into output file sbc Use media-libs/sbc for playing back SBC encoded packets sdjournal Install sdjournal, an extcap that captures systemd journal entries sharkd Install sharkd, the daemon variant of wireshark smi Use net-libs/libsmi to resolve numeric OIDs into human readable format spandsp Use media-libs/spandsp for for G.722 and G.726 codec support in the RTP Player sshdump Install sshdump, an extcap interface to capture from a remote host through SSH text2pcap Install text2pcap, to generate a capture file from an ASCII hexdump of packets tfshark Install tfshark, a terminal-based version of the FileShark capability tshark Install tshark, to dump and analyzer network traffic from the command line udpdump Install udpdump, to get packets exported from a source (like a network device or a GSMTAP producer) that are dumped to a pcap file zabbix agent Enable zabbix agent (for to-be-monitored machines) frontend Enable zabbix web frontend ipv6 Turn on support of IPv6 java Enable Zabbix Java JMX Management Gateway libxml2 Use libxml2 client library odbc Enable Database Monitor and use UnixODBC Library by default openipmi Enable openipmi things proxy Enable proxy support server Enable zabbix server ssh SSH v2 based checks static Build statically linked binaries zmap mongo Add support for storing in a mongo DB via dev-db/mongodb redis Add support for storing in a redis DB via dev-libs/hiredis net-dialup accel-ppp ipoe Build IPoE kernel module shaper Support for traffic shaping valgrind Compile in valgrind hints freeradius memcached Include dev-libs/libmemcached in caching drivers mongodb Include support for MongoDB database pcap Build the RADIUS sniffer which requires net-libs/libpcap. redis Include support for Redis database rest Include support for sending and receiving HTTP requests freeradius-client scp Add service type hints derived from username prefix shadow Enable shadow password support mgetty fax Enables fax support fidonet Enables FidoNet support openl2tp client Enable l2tp client. dmalloc Enable debugging using dev-libs/dmalloc. rpc Enable RPC control management. This flag is required for l2tpconfig to be built and used. server Enable l2tp server. stats Enable status files. Note: when they are used, this hampers performance of the daemon. ppp activefilter Enables active filter support atm Enables ATM (Asynchronous Transfer Mode) protocol support dhcp Installs PPP DHCP client plugin for IP address allocation by a DHCP server (see http://www.netservers.co.uk/gpl/) eap-tls Enables support for Extensible Authentication Protocol and Transport Level Security (see http://www.nikhef.nl/~janjust/ppp/index.html) gtk Installs GTK+ password prompting program that can be used by passprompt.so PPP plugin for reading the password from a X11 input terminal ipv6 Enables support for IP version 6 radius Enables RADIUS support xl2tpd dnsretry Patch for host lookup retries, activated by redial feature kernel Enable kernel interface for PPPoL2TP net-dns avahi autoipd Build and install the IPv4LL (RFC3927) network address configuration daemon bookmarks Install the avahi-bookmarks application (requires dev-python/twisted) gtk Use gtk3 for the avahi utilities (overrides USE=gtk2) and build the avahi-ui-gtk3 library gtk2 Use gtk2 for the avahi utilities (overridden by USE=gtk) and build the avahi-ui library howl-compat Enable compat libraries for howl mdnsresponder-compat Enable compat libraries for mDNSResponder bind dlz Enables dynamic loaded zones, 3rd party extension dnsrps Enable the DNS Response Policy Service (DNSRPS) API, a mechanism to allow an external response policy provider dnstap Enables dnstap packet logging fixed-rrset Enables fixed rrset-order option geoip2 Enable GeoIP2 API from MaxMind gssapi Enable gssapi support json Enable JSON statistics channel lmdb Enable LMDB support to store configuration for 'addzone' zones urandom Use /dev/urandom instead of /dev/random bind-tools gssapi Enable gssapi support ddclient examples Install various example files, like for cron. iproute2 Use sys-apps/iproute2 instead of sys-apps/net-tools for interaction. dnsdist dnscrypt Enable the ability to act as a DNSCrypt server dnstap Enable support for dnstap doh Enable support for dns over http via www-servers/h2o lmdb Enable support for lmdb regex Enable support for regular expression matching via dev-libs/re2 remote-logging Enable support for remote logging via dev-libs/protobuf ssl Enable support for and encrypted client-server communication via dev-libs/libsodium dnsmasq auth-dns Add support for acting as an authorative DNS server. conntrack Add support for Linux conntrack connection marking. dhcp Enable support for acting as a DHCP server. dhcp-tools Install extra command line tools for manually managing DHCP leases. dnssec Enable support DNSSEC validation and caching. dumpfile Include code to dump packets to a libpcap-format file for debugging id Whether report *.bind CHAOS info to clients, otherwise forward such requests upstream instead libidn2 Enable support for Internationalized Domain Names, via net-dns/libidn2 rather than net-dns/libidn script Enable support for calling scripts when leases change. tftp Enables built in TFTP server for netbooting. dnssec-validator dlv Enable support for the DNSSEC look-aside validation nsec3 Enable support for the NSEC3 Resource Record getdns getdns-query Add getdns_query tool getdns-server-mon Add getdns_server_mon tool libev Enable dev-libs/libev support libevent Enable dev-libs/libevent support libuv Enable dev-libs/libuv support nettle Use dev-libs/nettle as crypto backend stubby Add Stubby DNS Privacy Deamon unbound Enable net-dns/unbound libraries support hash-slinger ipsec Enable support for IPSECKEY records (ipseckey) openpgp Enable support for OPENPGPKEY records (openpgpkey) ssh Enable support for SSHFP records (sshfp) idnkit liteonly Compile and install lite library only knot cookies Enable the DNS cookie module (RFC 7873) dnsproxy Enable the tiny DNS proxy module dnstap Include support for the dnstap binary log format (http://dnstap.info/) fastparser Use a zone file parser that is faster, but requires more memory and CPU time to compile geoip Enable the Geography-based responses module libidn2 If IDN support is enabled, use net-dns/libidn2 instead of net-dns/libidn noudp Enable the module which can send empty truncated responses to UDP queries onlinesign Enable the module that sign zones on the fly instead of pre-signing zone queryacl Enable the module for query access control rrl Enable the response rate limiting module stats Enable the server statistics module synthrecord Enable the automatic forward/reverse records module utils Install Knot utilities, such as kdig, kzonecheck, ... whoami Enable the whoami response module ldns-utils dane Enable DNS-based Authentication of Named Entities (DANE) support ecdsa Enable ECDSA support ed25519 Enable ED25519 support ed448 Enable ED448 support gost Enable GOST support mydns alias Enable David Phillips aliasing status Enable the STATUS opcode to check server status nsd bind8-stats Enables BIND8 like NSTATS and XSTATS dnstap Enable the structured binary log format libevent Use libevent or libev, useful when zone count is high minimal-responses If minimal responses are disabled, responses are more likely to get truncated, resulting in TCP fallback munin Install a plugin for net-analyzer/munin to graph statistical data from nsd. nsec3 Enable NSEC3 support ratelimit Enables ratelimiting, based on query name, type and source root-server Configure NSD as a root server runtime-checks Enable runtime checks, this could lead to a reduced service level opendnssec auditor Enables auditing capabilities for OpenDNSSEC eppclient Enables support for automatic submission of DNSSEC keys to an upstream epp server external-hsm Enables support for storing DNSSEC keys through an arbitrary non-portage PKCS#11 interface, specified through an environment variable opensc Enables support for storing DNSSEC keys through a dev-libs/opensc PKCS#11 interface signer Enables signing capabilities for OpenDNSSEC softhsm Enables support for storing DNSSEC keys in a dev-libs/softhsm PKCS#11 object pdns lua-records Enable LUA records. mydns Making it possible to use a MyDNS MySQL database with PowerDNS (not recommended for new deployments). protobuf Enable support for dev-libs/protobuf. remote Use a generic socket or pipe as a backend (via JSON RPC requests). sodium Use dev-libs/libsodium for cryptography tinydns Use a TinyDNS CDB database as backend. tools Build optional tools (dnsscan, dnsscope, etc..). pdns-recursor dnstap Enable support for dnstap protobuf Enable support for dev-libs/protobuf. sodium Use dev-libs/libsodium for cryptography pdnsd isdn Linux-only: check status of ippp interfaces with ISDN-specific system calls. urandom Linux-only: use /dev/urandom (pseudo-random number generation) instead of the default use of random() PRNG. resolvconf-symlink symlink Actually replace /etc/resolv.conf with a symlink. Without this flag, the ebuild is a no-op. unbound dnscrypt Enable DNSCrypt support dnstap Enable dnstap support ecdsa Enable ECDSA support ecs Enable EDNS client subnet support gost Enable GOST support http2 Enable HTTP/2 support for DoHnet-libs/nghttp2 redis Enable cache db backend which uses dev-libs/hiredis net-firewall arno-iptables-firewall plugins Install optional plugins rsyslog Install configuration snippet for app-admin/rsyslog conntrack-tools cthelper Use net-libs/libnetfilter_cthelper for userspace conntrack helper support cttimeout Use net-libs/libnetfilter_cttimeout for conntrack timeout support libtirpc Use net-libs/libtirpc for RPC support ebtables perl Install the ebtables-save script which uses perl firehol ipset Use net-firewall/ipset. firewalld iptables Add support for net-firewall/nftables as firewall backend nftables Add support for net-firewall/nftables as firewall backend fwknop client Build fwknop client extras Install utility scripts and AppArmor policy for fwknopd firewalld Use net-firewall/firewalld as the default server backend gdbm Use sys-libs/gdbm to store fwknopd digest cache gpg Enable GPG support via app-crypt/gpgme iptables Use net-firewall/iptables as the default server backend nfqueue Enable UDP-only NFQUEUE server mode (no net-libs/libpcap dependency) server Build fwknopd server udp-server Enable UDP-only server mode (no net-libs/libpcap dependency) ipt_netflow natevents Netflow NAT translation events (NEL) support iptables conntrack Build against net-libs/libnetfilter_conntrack when enables the connlabel matcher netlink Build against libnfnetlink which enables the nfnl_osf util nftables Support nftables kernel interface pcap Build against net-libs/libpcap which enables the nfbpf_compile util nftables doc Create man pages for the package (requires app-text/asciidoc) json Enable JSON support via dev-libs/jansson modern-kernel Install init scripts for 3.18 or higher kernels with atomic rule updates xtables Add libxtables support to try to automatically translate rules added by iptables-compat nufw nfconntrack Use netfilter_conntrack nfqueue Use NFQUEUE instead of QUEUE pam_nuauth Add support for pam nufw from PAM plaintext Add support for authentication with plaintext files prelude Add support/bindings for the Prelude Intrusion Detection System pglinux cron Install cron script logrotate Install logrotate.d file shorewall init Adds the capability to place the firewall in a safe state prior to bringing up the network interfaces ipv4 Installs everything needed to create a full IPv4 firewall ipv6 Adds the capability to create a full IPv6 firewall (requires net-firewall/shorewall ipv4 USE flag) lite4 Installs everything needed to just *run* an IPv4 compiled firewall script created with net-firewall/shorewall ipv4 USE flag lite6 Installs everything needed to just *run* an IPv6 compiled firewall script created with net-firewall/shorewall ipv6 USE flag ufw examples Example ufw config files ipv6 IPv6 support for iptables net-fs autofs dmalloc Enable debugging with the dmalloc library ldap Install LDAP module libtirpc Use TiRPC library instead of SunRPC mount-locking Enable locking to prevent corruption of /etc/mtab in the presence of concurrent auto-mounting. If enabled, recursive auto-mounting (eg. using autofs to bind or loop mount a filesystem which is itself auto-mounted) is not possible. sasl Enable SASL support in the LDAP module cifs-utils ads Enable Active Directory support and create cifs.idmap binary - idmap support caps Enable sys-libs/libcap-ng support creds cifs credentials support cvmfs server Install the cvmfsd program and init script libnfs utils Build/install nfs-{cat,ls,cp} utils netatalk pgp Add support pgp authentication module quota Add support for user quota on various filesystems shadow Add shadow support ssl Use dev-libs/openssl to provide DHX User Access Modules. These are not used with most recent versions of OS X and can be kept disabled without risks. tracker Add support for spotlight like tracker nfs-utils junction Enable NFS junction support in nfsref ldap Add ldap support libmount Link mount.nfs with libmount nfsdcld Enable nfsdcld NFSv4 clientid tracking daemon nfsidmap Enable support for newer nfsidmap helper nfsv4 Enable support for NFSv4 nfsv41 Enable support for NFSv4.1 uuid Support UUID lookups in rpc.mountd openafs apidoc Build API documentation using app-doc/doxygen. May take a *long* time to build. bitmap-later Enable fast startup of file server by not reading bitmap till needed. fuse Build fuse client. kauth Install the DEPRECATED kauth server, PAM modules, and utilities modules Build libafs kernel module. Disable only if you know what you're doing: without this module OpenAFS client will not work. namei Enable namei fileserver instead of inode fileserver. You should disable this option only if compatibility with inode format AFS storage is required. pthreaded-ubik Enable installation of pthreaded ubik applications. supergroups Enable support for nested pts groups. tsm Enable use of the Tivoli TSM API libraries from app-backup/tsm for butc support. AMD64 only. ubik-read-while-write Enable vlserver read from db cache during write locks (EXPERIMENTAL) s3fs gnutls Enable net-libs/gnutls crypto backend nettle Use dev-libs/nettle network functions with GnuTLS. nss Enable dev-libs/nss crypto backend openssl Enable dev-libs/openssl crypto backend samba addc Enable Active Directory Domain Controller support addns Enable AD DNS integration ads Enable Active Directory support ceph Enable support for Ceph distributed filesystem via sys-cluster/ceph client Enables the client part cluster Enable support for clustering dmapi Enable support for DMAPI. This currently works only in combination with XFS. gpg Use app-crypt/gpgme for AD DC iprint Enabling iPrint technology by Novell json Enable json audit support through dev-libs/jansson profiling-data Enables support for collecting profiling data quota Enables support for user quotas snapper Enable vfs_snapper module (requires sys-apps/dbus) system-heimdal Use app-crypt/heimdal instead of bundled heimdal. system-mitkrb5 Use app-crypt/mit-krb5 instead of app-crypt/heimdal. winbind Enables support for the winbind auth daemon net-ftp frox transparent Enable transparent proxying of data connections lftp convert-mozilla-cookies Install the convert-mozilla-cookies script and its run-time dependencies verify-file Install the verify-file script and its run-time dependencies proftpd authfile Enable support for the auth-file module ban Enable support for the mod_ban module case Enable support for the mod_case module copy Enable support for the mod_copy module ctrls Enable support for the mod_ctrls and mod_ctrls_admin modules deflate Enable support for the mod_deflate module diskuse Enable support for the mod_diskuse module dso Enable support for the mod_dso module dynmasq Enable support for the mod_dynmasq module, for dynamically updating MasqueradeAddress for dyndns-like scenarios) exec Enable support for the mod_exec module. WARNING: this could be a security risk ident Enable support for the mod_ident module ifsession Enable support for the ifsession module ifversion Enable support for the mod_ifversion module log-forensic Enable support for the mod_log_forensic module, log only suspicious actions. memcache Enable support for the mod_memcache module, for using memcached servers msg Enable support for the mod_msg module, allows system users to send messages to connected clients via the ftpdctl program. qos Enable support for the mod_qos module ratio Enable support for the mod_ratio module readme Enable support for the mod_readme module rewrite Enable support for the rewrite module sftp Enable support for the mod_sftp module and optionally mod_sftp_sql and mod_sftp_pam if matching USE flags are enabled shaper Enable support for the mod_shaper module sitemisc Enable support for the sitemisc module sodium Use dev-libs/libsodium for password encryption an key exchange softquota Enable support for the quotatab module unique-id Enable support for the mod_unique_id module, every connection gets unique ID. vroot Enable support for the virtual root module pure-ftpd anondel Permit anonymous to delete files anonperm Permit anonymous to change file permissions anonren Permit anonymous to rename files anonres Permit anonymous to resume file transfers implicittls Enable TLS on Port 990 noiplog Disables logging of IP addresses paranoidmsg Display paranoid messages instead of normal ones resolveids Resolve UIDs/GIDs sysquota Enables system quota support (needs sys-fs/quota) vchroot Enable support for virtual chroot (possible security risk) tftp-hpa client Compile and install the tftp client server Compile and install the tftp server yafc ssh Build with SFTP support net-im bitlbee libevent Use libevent for event handling msn Enable MSN Messenger IM protocol support. nss Use NSS for SSL support in MSN and Jabber oscar Enable Oscar (AIM/ICQ) IM protocol support otr Enable support for encrypted conversations plugins Enable support for plugins purple Use libpurple instead of the built-in IM protocol support twitter Enable Twitter protocol support choqok attica Build Open Collaboration Services plugin using kde-frameworks/attica konqueror Build Konqueror Choqok plugin share Enable support for a share menu using kde-frameworks/purpose telepathy Enable support for the real-time communication framework telepathy corebird spellcheck Support spell checking coturn mongodb Enable support for the mongodb database redis Enable support for the redis database dino gpg Enable OpenPGP encryption plugin http Enable HTTP file upload plugin omemo Enable OMEMO encryption plugin ejabberd captcha Support for CAPTCHA Forms (XEP-158) on registration full-xml Use XML features in XMPP stream (ex: CDATA), requires XML compliant clients hipe Compile natively with HiPE, not recommended mssql Enable Microsoft SQL Server support (via ODBC) for data storage mysql Enable MySQL support for data storage odbc Enable ODBC support to access data storage postgres Enable PostgreSQL support for data storage redis Enable Redis support for transient data roster-gw Turn on workaround for processing gateway subscriptions sip Enable SIP support sqlite Enable SQLite database support stun Enable STUN/TURN support zlib Enable Stream Compression (XEP-0138) using zlib ekg2 gadu Enable Gadu-Gadu protocol support (requires net-libs/libgadu). gpg Enable jabber message encryption through app-crypt/gpgme. minimal Disable building extra plugins with no additional deps. openssl Support encryption in sim plugin, using OpenSSL. sqlite Support logging messages into SQLite3 database. element-desktop-bin emoji Use media-fonts/noto-emoji for displaying emoji empathy gnome-online-accounts Enable using net-libs/gnome-online-accounts for authorization (e.g. for Google Talk) map Enable world map support through media-libs/libchamplain err irc Pull optional dependencies, needed for IRC backend gajim crypt End to end encryption and GPG encryption geolocation Sharing your location jingle Audio and video calls remote Controling Gajim instance from command line with gajim-remote rst Generating XHTML output from RST code spell Spellchecking of composed messages upnp Ability to request your router to forward port for file transfer webp Support WebP avatars gitter-bin pax_kernel Triggers a paxmarking of the binary kadu gadu Enables Gadu communication protocol mpd Enables Music Player Daemon support otr Enable char encryption via OTR library sdk Install Kadu SDK (cmake module, API headers) speech Enables speech module libcommuni qml Install optional qml files. uchardet Use app-i18n/uchardet, which is upstreams default, instead of dev-libs/icu, which makes impossible to run tests. mcabber aspell Adds support for app-text/aspell spell checker. otr Enable encrypted conversations using Off-The-Records messaging pidgin gadu Enable Gadu Gadu protocol support groupwise Enable Novell Groupwise protocol support gstreamer Enables voice and video sessions gtk Builds Pidgin, the GTK+ interface meanwhile Enable meanwhile support for Sametime protocol ncurses Build finch, console interface prediction Enable Contact Availability Prediction plugin python Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support xscreensaver Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events zephyr Enable Zephyr protocol support profanity gpg Enable OpenPGP encryption omemo Enable OMEMO encryption otr Enable encrypted conversations using Off-The-Records messaging prosody jit Use LuaJIT instead of vanilla Lua libevent Use libevent for event handling psi aspell Enable spellchecking using app-text/aspell enchant Enable spellchecking using app-text/enchant extras Enable Psi+ patchset hunspell Enable spellchecking using app-text/hunspell iconsets Install additional iconsets, some of them have no clear licensing keyring Enable storing password in system keyring manager webengine Enable themed, html-based chatlogs using dev-qt/qtwebengine webkit Enable themed, html-based chatlogs using dev-qt/qtwebkit whiteboarding Enable experimental interactive SVG drawing xscreensaver Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events psimedia extras Enable Psi+ mode (required when built for Psi+) qtox X Adds support for X11 notification Adds support for GTK Status Notifier tray backends spectrum2 frotz Enables the Z-Engine backend. irc Enables the IRC backend, based on net-im/libcommuni. purple Enables the libpurple backend, based on net-im/pidgin. sms Enables the SMS backend, based on app-mobilephone/smstools. twitter Enables the Twitter backend. whatsapp Enables the WhatsApp backend, based on net-im/transwhat. swift client Build the full graphical XMPP client. gconf Enable configuration through gnome-base/gconf. teams system-ffmpeg Use the system-wide media-video/ffmpeg instead of bundled. system-mesa Use the system-wide media-libs/mesa instead of bundled. telegram-desktop enchant Enable the app-text/aspell spell-checking backend hunspell Enable the app-text/hunspell spell-checking backend telepathy-connection-managers gadu Enable Gadu Gadu protocol support. icq Enable ICQ IM protocol support. irc Enable Internet Relay Chat (IRC) support. meanwhile Enable meanwhile support for Sametime protocol. msn Enable MSN Messenger IM protocol support. sip Enable SIP/SIMPLE messaging and calling. sipe Enable Sip Exchange Protocol. steam Enable Steam Chat support. xmpp Enable XMPP protocol handler (this is also Google Talk). yahoo Enable Yahoo! messaging support. zeroconf Enable Link-Local Messaging via the zeroconf or Bonjour protocol. tkabber plugins Enables installation the extra plugins toxic notification Enables desktop notifications with libnotify, with sound support. qrcode Enables QR code support sound Enables audio calling video Enables video calling vacuum adiummessagestyle Use UI styles created for Adium annotations Enable adding comments to the contacts in the roster aspell Select app-text/aspell spell checker backend autostatus Change the status in accordance with the time of inactivity avatars Enable assigning and displaying avatars birthdayreminder Reminds about birthdays of your friends bitsofbinary Allow other modules to receive or send a small amount of binary data in XMPP stanza bookmarks Enable creating bookmarks of the Jabber conferences and Web pages captchaforms Perform tests for humanity outside of Web browser chatstates Post user's activity to the chat clientinfo Enable sending and receiving peer's application version, local time and last activity info commands Enable performing special commands provided by various services compress Compress stream of messages console Enable inspecting a raw XML stream dataforms Allow other modules to process and display data forms intended for the user datastreamsmanager Enable initiating a custom data stream between two XMPP entities emoticons Enable using smiley images in messages enchant Select app-text/enchant spell checker backend filemessagearchive Allows to save the history of conversations to local files filestreamsmanager Enable transferring files between two XMPP entities filetransfer Enable sending files to peers gateways Simplify the interaction with gateways to other IM systems hunspell Select app-text/hunspell spell checker backend inbandstreams Enable initiating in-band data stream between two XMPP enitites iqauth Enable logging on Jabber servers withous SASL authentication support jabbersearch Enable searching contacts in Jabber networks messagearchiver Enable saving the communication history both locally and on the server messagecarbons Allows to keep all user IM clients engaged in a conversation multiuserchat Enable Jabber multi-user conferences pepmanager Allows other plugins to receive and publish PEP events privacylists Enable blocking the undesirable contacts privatestorage Allow other modules to store arbitrary data on the server recentcontacts Displays a recently used contacts registration Enable creating accounts in Jabber services remotecontrol Allows to remotely control the client rosteritemexchange Allows to exchange contact list items rostersearch Allows to search for contacts in the roster servermessagearchive Allows to save the history of communications on the server servicediscovery Enable receiving information about Jabber entities sessionnegotiation Enable initiating the session between two entities with setting the rules for XMPP stanzas exchange shortcutmanager Allows to setup user defined shortcuts socksstreams Enable initiating SOCKS5 data streams between two XMPP entities urlprocessor Allows other plugins to load data from custom types of URLs vcard Enable obtaining peer's personal contact information xmppuriqueries Allow other plugins to handle XMPP URI queries zoom bundled-libjpeg-turbo Use bundled libturbojpeg instead of media-libs/libjpeg-turbo net-irc anope ldap Build LDAP modules for e.g. opertypes sql Build modules which require SQL ssl Provide SSL services using OpenSSL tre Use dev-libs/tre for regular expressions atheme-services cracklib Enable nickserv/cracklib module for enforcing strong account passwords largenet Enable support/tweaks for large networks ldap Enable ldap-backed authentication module perl Install a perl module which wraps around the services' XML-RPC interface epic5 archive Use app-arch/libarchive to use zip and tar archives from scripts. valgrind Compile against dev-util/valgrind headers to improve memory-leak checking when running epic5 under valgrind. hexchat libcanberra Enable sound event support using media-libs/libcanberra libproxy Enable proxy support. plugin-checksum Build Checksum plugin (needs plugins) plugin-fishlim Build FiSHLiM plugin (needs plugins ) plugin-sysinfo Build SysInfo plugin (needs plugins) theme-manager Build the theme manager (mono) inspircd gnutls Enable TLS support ldap Enable LDAP support maxminddb Add support for geolocation using libMaxMindDB mbedtls Add support for TLS using the mbedTLS library mysql Enable MySQL database backend postgres Enable PostgreSQL database backend re2 Add support for Google RE2 regular expressions library regex-posix Add support for POSIX Regular Expressions regex-stdlib Add support for C++ stdlib regular expressions sqlite Enable Sqlite database backend ssl Enable SSL support sslrehashsignal Enable rehashing SSL module by SIGUSR1 tre Enable support for TRE, a lightweight, robust, and efficient POSIX compliant regexp matching library iroffer-dinoex admin Compile with HTTP Admin blowfish Compile with blowfish encryption support chroot Compile with chroot support http Compile with HTTP server support kqueue Compile with kqueue() support memsave Compile with memory protection telnet Compile with Telnet server support irssi otr Adds support for a loadable IRC otr module proxy Adds support for a loadable IRC proxy module kvirc dcc_video Support video connections over DCC protocol phonon Support Phonon for audio output limnoria crypt Enables user authentication with GPG ngircd ident Enables support for net-libs/libident irc-plus Enables support for the IRC+ protocol (needs virtual/libiconv) strict-rfc Strict RFC compliance; may harm compatibility psybnc multinetwork Adds support for multiple networks oidentd Adds support for oidentd scripting Adds scripting support quassel X Build the Qt5 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client. bundled-icons Use icon themes bundled with Quassel, rather than depending on system packages. crypt Support core->network per-channel and per-query blowfish encryption via app-crypt/qca SLOT 2. dbus Support desktop notifications via the StatusNotifier D-Bus service (used by most modern desktop environments). monolithic Build standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use Quassel's client/server model. The server and X flags are not needed in this case but it is possible to enable them too. oxygen Support the Oxygen icon set that was the default for KDE4. server Build the server binary. If this USE flag is disabled, the 'core' server binary for quassel is not built, and cannot be used. You need this enabled on the server, but you might want to disable it on the client. snorenotify Support for Snore notification framework. urlpreview Use QtWebEngine rendering engine for showing URL thumbnails. rbot aspell Use aspell instead of ispell in the "spell" plugin for rbot. The vanilla plugin uses ispell, but enabling this flag makes it use the ispell interface from aspell instead. cal Add dependency over a package providing the /usr/bin/cal command, which is needed to enable the "cal" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. figlet Add dependency over app-misc/figlet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use figlet; if toilet is also disabled, the plugin will be disabled. fortune Add dependency over games-misc/fortune-mod, which is needed to enable the "fortune" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. host Add dependency over net-dns/bind-tools (providing /usr/bin/host), which is needed to enable the "host" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. nls Build and install translation for the messages coming from the bot and its plugins (through dev-ruby/ruby-gettext). shorturl Add dependency over dev-ruby/shorturl, which is needed to enable the "shortenurl" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. timezone Add dependency over dev-ruby/tzinfo to enable the "time" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. toilet Add dependency over app-misc/toilet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use toilet; if figlet is also disabled, the plugin will be disabled. translator Add dependency over dev-ruby/mechanize, which is needed to enable the "translator" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default. unrealircd class-nofakelag Enable an unsupported class::options flag called “nofakelag” allowing you to grant fakelag exemption to normal user (instead of just opers). extban-stacking Enable extended channel bans (such as +b ~c: and +b ~n:) to contain other extended bans instead of just hostmasks. operoverride Enable OperOverride extension operoverride-verify Enable requiring opers to invite themselves to +s/+p channels prefixaq Enable chanadmin and chanowner prefixes showlistmodes Display channel modes in /LIST (only configured at compiletime) shunnotices Enable notifying a user when un-shunned usermod Enable /set* and /chg* commands weechat alias Enable plugin for alias control buflist Enable buflist plugin charset Enable encoding conversions exec Enable exec plugin fifo Enable FIFO support (sh pipes) fset Enable fast set plugin irc Enable IRC protocol support logger Enable support for logging man Build and install man pages relay Enable relay plugin (experimental) scripts Build infrastructure for scripting trigger Enable trigger plugin xfer Enable xfer plugin support znc zlib Enable mod_deflate-like gzip support for znc's web interface using sys-libs/zlib. net-libs aqbanking ebics Enable support for Electronic Banking Internet Communication Standard (EBICS) axtls cgi-lua Enables lua backed cgi for axhttpd server cgi-php Enables php backed cgi for axhttpd server httpd Enables axhttpd web server component static Statically build axhttpd server c-client chappa Enable Eduardo Chappa's patches for use with mail-client/alpine (mainly adds support for maildir) doc Install RFCs related to IMAP topal Enable support for net-mail/topal for use with mail-client/alpine cvm vpopmail Enable vpopmail support czmq drafts Build draft API, which may change at any time without any notice, and is therefore not recommended for normal use. (requires draft support in net-libs/zeromq as well) http-client Build support for HTTP client using net-misc/curl http-server Build support for HTTP server using net-libs/libmicrohttpd uuid Enable UUID support using sys-apps/util-linux daq afpacket Build the AFPacket data acquisition module. Functions similar to the PCAP module but with better performance. Snort can run unprivileged when using this module. AFpacket supports both inline and passive modes. dump Build the Dump data acquisition module. The dump DAQ allows you to test the various inline mode features available in 2.9 Snort like injection and normalization. ipq Build the IPQ data acquisition module. IPQ is the old way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module. nfq Build the NFQ data acquisition module. NFQ is the new way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module. pcap Build the PCAP data acquisition module. davix tools Install additional tools freaklabs-chibiarduino promisc Enable promisc in the config file for packet sniffing glib-networking gnome Extract HTTP/HTTPS/SOCKS proxy configuration stored using GSettings libproxy Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration gnome-online-accounts gnome Use gnome-base/gnome-control-center to set GNOME online accounts preferences gnutls dane Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound openssl Build openssl compatibility libraries pkcs11 Add support for PKCS#11 through app-crypt/p11-kit sslv2 Support for the old/insecure SSLv2 protocol sslv3 Support for the old/insecure SSLv3 protocol test-full Enable full test mode tls-heartbeat Enable the Heartbeat Extension in TLS and DTLS tools Build extra tools valgrind Enable usage of dev-util/valgrind in debug iax snomhack Use slower memset for SNOM phoneem ldns dane Enable DNS-based Authentication of Named Entities (DANE) support ecdsa Enable ECDSA support ed25519 Enable ED25519 support ed448 Enable ED448 support gost Enable GOST support libbitcoinconsensus asm Enable assembly for optimization knots Build enhanced Bitcoin Knots version, rather than Bitcoin Core libbtbb wireshark-plugins Build the wireshark plugins for bluetooth baseband sniffing libesmtp ntlm Enable support for NTLM authentication libetpan liblockfile Enable support for liblockfile library lmdb Use dev-db/lmdb as cache DB libgsasl gcrypt Use dev-libs/libgcrypt for low-level crypto ntlm Add support for Microsoft's NTLM mechanism using net-libs/libntlm libiio aio Enable asynchronous IO support libisds openssl Use dev-libs/openssl as crypto backend instead of app-crypt/gpgme and dev-libs/libgcrypt libmicrohttpd epoll use epoll() system call messages enable error messages libnids glib Use dev-libs/glib for multiprocessing support libnet Include code requiring net-libs/libnet libnma pkcs11 Enable PKCS#11 support in certificate chooser via app-crypt/gcr liboauth bindist Alias for the nss USE flag, since there are license compliancy trouble when using OpenSSL. curl If enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations. nss Use Mozilla NSS (dev-libs/nss) as hash library; if this is disabled, dev-libs/openssl is used instead. liboping filecaps Allow non-root users to use [n]oping utility. ncurses Build ncurses-based version of oping utility (requires sys-libs/ncurses) libosmocore embedded Build for embedded use and disable unsupported features pcsc-lite Enable smartcard support with sys-apps/pcsc-lite libpcap netlink Use dev-libs/libnl to put wireless interfaces in monitor mode. rdma Enable RDMA capture support using sys-cluster/rdma-core remote Enable remote packet capture which may expose libpcap-based applications to attacks by malicious remote capture servers! yydebug Enable parser debugging code libprotoident tools Build and install command-line tools libproxy gnome Enable support for reading proxy settings from GNOME kde Enable support for reading proxy settings from KDE spidermonkey Use libmozjs from dev-lang/spidermonkey for PAC parsing webkit Use libjavascriptcoregtk from net-libs/webkit-gtk for PAC parsing libpsl man Build man-pages libqmi mbim Support QMI over Mobile Broadband Interface Model (MBIM) libsoup brotli Enable brotli decompression support gssapi Enable GSSAPI support samba Use net-fs/samba for NTLM Single Sign-On libsrtp aesicm Use AES ICM cryptographic algorithm console Use /dev/console instead of stdout for error messages nss Use NSS crypto primitives openssl Use OpenSSL crypto primitives syslog Use syslog for error messages libssh gcrypt Use dev-libs/libgcrypt as TLS provider gssapi Enable gssapi support mbedtls Use net-libs/mbedtls as TLS provider pcap Build with PCAP output support server Build with SSH server support sftp Build with SFTP support libssh2 gcrypt Use dev-libs/libgcrypt instead of dev-libs/openssl libressl Use dev-libs/libressl instead of dev-libs/openssl mbedtls Use net-libs/mbedtls instead of dev-libs/openssl libtorrent-rasterbar dht Enable DHT (distributed hash table) support libtrace numa Use sys-process/numactl libupnp blocking-tcp Do not use async socket calls. reuseaddr Allow clean restarts by binding the socket with SO_REUSEADDR. samples Install sample applications. libvncserver 24bpp Enable 24bpp support filetransfer Enable support for TightVNC's file transfer protocol gcrypt Use dev-libs/libgcrypt as crypto backend lzo Enable LZO support via dev-libs/lzo instead of using internal miniLZO implementation libwebsockets access-log Support generating Apache-compatible access logs cgi Include CGI (spawn process with network-connected stdin/out/err) APIs client The client part of the library and libwebsockets-test-client generic-sessions With the Generic Sessions plugin http-proxy Support for rewriting HTTP proxying http2 Support the HTTP/2 protocol lejp With the Lightweight JSON Parser libev Support event loops via dev-libs/libev libevent Support event loops via dev-libs/libevent libuv Support asynchronous I/O via dev-libs/libuv mbedtls Use mbedTLS replacement for OpenSSL peer-limits Track peers and restrict resources a single peer can allocate server-status Support json + jscript server monitoring smtp Provide SMTP support socks5 Allow use of SOCKS5 proxy on client connections sqlite3 Require SQLITE3 support zip Support serving pre-zipped files loudmouth asyncns Use net-libs/libasyncns for asynchronous name resolution. openssl Enable dev-libs/openssl support instead of gnutls (which is the default). mbedtls havege Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments programs Build PolarSSL programs neon libproxy Add support for net-libs/libproxy pkcs11 Add support for PKCS#11 using dev-libs/pakchois nghttp2 hpack-tools Install HPACK (header compression) helper tools utils Install nghttp, nghttpd and nghttpx nodejs inspector Enable V8 inspector npm Enable NPM package manager pax_kernel Enable building under a PaX enabled kernel snapshot Enable snapshot creation for faster startup system-ssl Use system OpenSSL instead of the bundled one systemtap Enable SystemTAP/DTrace tracing ntirpc gssapi Include support for RPCSEC GSS rdma Include support for RDMA RPC onion boehm-gc Add dev-libs/boehm-gc support for memory allocations. libev Use dev-libs/libev as thread poller instead of Linux's epoll. libevent Use dev-libs/libevent as thread poller instead of libev or Linux's epoll. redis Add support for redis sessions. ortp ntp-timestamp Turn on NTP timestamping on received packet srtp Add support for Secure RTP phodav spice Install the spice-webdavd guest agent pjproject amr Inlcude AMR codec in the build epoll Use /dev/epoll ioqueue on Linux (experimental) g711 Include G.711 codecs in the build g722 Include G.722 codec in the build g7221 Include G.722.1 codec in the build g729 Include G.729 codec via net-libs/bcg729 ilbc Include iLBC codec in the build l16 Include Linear/L16 codec family in the build libyuv Include libyuv in the build openh264 Include Open H.264 support in the build resample Include resampling implementations in the build silk Include SILK support in the build v4l2 Include Video4Linux v2 support in the build vpx Include VP8 and VP9 codec support in the build webrtc Enable WebRTC support qxmpp vpx Enable VP8 codec support via media-libs/libvpx rabbitmq-c tools Builds cli tools to interact with brokers shairplay alac Add support for Apple Lossless Audio Codec files playfair Add support for handling fairplay handshake (used in for example screen mirroring) tools Build and install a binary shairplay in /usr/bin telepathy-qt farstream Enable support for audio/video calls via farstream tox av Adds support for audio and video. daemon Enable the DHT Bootstrap Daemon. dht-node Enables DHT Bootstrap Node. log-debug Log level: 4 log-error Log level: 1 log-info Log level: 3 log-trace Log level: 5 log-warn Log level: 2 udns tools Build and install dnsget, ex-rdns and rblcheck tools wandio http Build support for reading files over HTTP using net-misc/curl webkit-gtk egl Enable EGL support geolocation Enable geolocation support through app-misc/geoclue jumbo-build Combine source files to speed up build process wvstreams boost Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface. xrootd fuse Enable the sys-fs/fuse filesystem driver http Enable http protocol support zeromq drafts Build draft API, which may change at any time without any notice, and is therefore not recommended for normal use. pgm Build PGM (Pragmatic General Multicast)extention, a protocol for reliable multicast transport of data over IP networks. sodium Use dev-libs/libsodium for cryptography net-mail courier-imap trashquota include deleted messages, and the Trash folder, in the estimated quota usage for maildirs cyrus-imapd backup Enable backup service support calalarm Enable CalDAV alarm support http Enable http and http/2 support lmdb Enable support for using dev-db/lmdb replication Enable replication support server Enable building server binaries sieve Enable sieve support xapian Enable Xapian search engine support dbmail sieve Enable sieve filter support dovecot argon2 Add support for ARGON2 password schemes lucene Add lucene full text search (FTS) support using dev-cpp/clucene lzma Add support for lzma (de)compression managesieve Add managesieve protocol support rpc Add support for NFS quotas sieve Add sieve support solr Add solr full text search (FTS) support textcat Add libtextcat language guessing support for full text search (FTS) vpopmail Add vpopmail support zstd Add support for zstd (de)compression fdm courierauth Add support for Courier authentication library fetchmail socks Enable support for socks proxy tk Enable support for Tk GUI toolkit, in particular it installs fetchmailconf gnubiff password Enable save passwords to connect mail servers in user space lbdb abook Enables app-misc/abook support bbdb Include support for app-emacs/bbdb evo Add support for mail-client/evolution finger Enables finger support mailutils clients Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh kyotocabinet Enable Kyoto Cabinet database support servers Build server programs - imap4d pop3d comsatd tokyocabinet Enable Tokyo Cabinet database support mboxgrep dmalloc Enable debugging using dev-libs/dmalloc mu emacs Install the mu4e mail client mug Install the mug toy client, not for normal use notmuch crypt Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption; support also S/MIME signature verification since version 0.22 doc Install API documentation emacs Install Emacs UI (the main one) mutt Install helper script for Mutt nmbug Install experimental tag sharing / pseudo-bug-tracking script for Notmuch (see http://notmuchmail.org/nmbug/) valgrind Depend on dev-util/valgrind for test suite qmailadmin maildrop Filter spam using maildrop tpop3d authexternal Enable authentication by an external program flatfile Enable authentication against /etc/passwd-style flat files passwd Enable /etc/passwd authentication sha1 Use OpenSSL for sha1 encrypted passwords. shadow Enable /etc/shadow authentication vchkuser debug Enables debug messages to syslog vpopmail clearpasswd Enables cleartext password storage in the vpasswd files ipalias Enables enable-ip-alias-domains maildrop Enables mail-filter/maildrop support in vdelivermail spamassassin Enables mail-filter/spamassassin support net-misc AQtion lro Enable/disable Large Receive Offload. This MUST be disabled for bridging or forwarding. apt-cacher-ng fuse Install the sys-fs/fuse based acngfs, to use a userspace filesystem for the apt cache. aria2 bittorrent Enable support for the bittorrent protocol. gnutls Use net-libs/gnutls as TLS provider (preferred). Otherwise, dev-libs/openssl will be used as TLS provider. Both apply only with USE=ssl. libuv Use dev-libs/libuv backend. libxml2 Use dev-libs/libxml2 for XML parsing (preferred) instead of dev-libs/expat. metalink Enable support for metalink. nettle Use dev-libs/nettle for message digests, plus dev-libs/gmp for bittorrent (if enabled). If this flag is disabled, dev-libs/libgcrypt is used instead. This flag is ignored if dev-libs/openssl is used. scripts Install additional scripts which use aria2's xmlrpc functionality. ssh Enable SFTP support. asterisk cluster Enable high-availability support through the Corosync Cluster Engine dahdi Support Digium compatible hardware (formerly known as Zaptel). gtalk Enable support for Google Talk services http Enable embedded web server ilbc Enable the Internet Low Bitrate Codec (iLBC) newt Include additional tools that require redhats windowing toolkit pjproject Enable support for pjproject (pjsip) samples Install sample sound and configuration files (default: on) span Enable support for the spandsp codec srtp Enable support for encrypted voice transmission (secure RTP) statsd Enable statsd integration unbound Enable improved DNS core (SRV, NAPTR) by use of libunbound asterisk-core-sounds alaw Install the sounds files for the alaw codec. g722 Install the sounds files for the g722 codec. g729 Install the sounds files for the g729 codec. siren14 Install the sounds files for the siren14 codec. siren7 Install the sounds files for the siren7 codec. sln16 Install the sounds files for the sln16 codec. ulaw Install the sounds files for the ulaw codec. wav Install the sounds files for the wav codec. asterisk-extra-sounds alaw Install the sounds files for the alaw codec. g722 Install the sounds files for the g722 codec. g729 Install the sounds files for the g729 codec. gsm Install the sounds files for the gsm codec. siren14 Install the sounds files for the siren14 codec. siren7 Install the sounds files for the siren7 codec. sln16 Install the sounds files for the sln16 codec. ulaw Install the sounds files for the ulaw codec. wav Install the sounds files for the wav codec. asterisk-moh-opsound alaw Install the sounds files for the alaw codec. g722 Install the sounds files for the g722 codec. g729 Install the sounds files for the g729 codec. gsm Install the sounds files for the gsm codec. siren14 Install the sounds files for the siren14 codec. siren7 Install the sounds files for the siren7 codec. sln16 Install the sounds files for the sln16 codec. ulaw Install the sounds files for the ulaw codec. wav Install the sounds files for the wav codec. bfgminer adl Enable support for controlling fans and overclocking on AMD cards with AMD Display Library alchemist Enable support for mining with AlcheMist antminer Enable support for mining with AntMiner U1 sticks avalon Enable support for mining with Avalon 1 ASIC modules avalonmm Enable support for mining with Avalon 2/3 ASIC modules bfsb Enable support for mining on BFSB host Raspberry Pi bfx Enable support for mining with BFx2 USB sticks bifury Enable support for mining with Bi*fury USB sticks bigpic Enable support for mining with Big Picture Mining USB sticks (Red/BlueFury, BF1, etc) bitforce Enable support for mining with ButterFly Labs BitFORCE ASICs and/or FPGAs bitfury Enable support for mining with 55nm Bitfury-based devices bitmain Enable support for mining with Bitmain Antminer S* series cointerra Enable support for mining with CoinTerra TerraMiner. cpumining Enable support for mining with CPUs drillbit Enable support for mining with Drillbit boards dualminer Enable support for mining with DualMiner USB sticks gridseed Enable support for mining with 5-chip GridSeed orbs hashbuster Enable support for mining with HashBuster nano boards hashbuster2 Enable support for mining with HashBuster micro boards hashfast Enable support for mining with HashFast devices icarus Enable support for mining with Icarus-compatible devices (including Block Erupter Sapphire ASICs) jingtian Enable support for mining on JingTian boards via SPI/GPIO keccak Enable support for mining with Keccak miners klondike Enable support for mining with Klondike USB miners libusb Use libusb littlefury Enable support for mining with LittleFury USB sticks metabank Enable support for mining on Metabank host Raspberry Pi minion Enable support for mining on minion chips via SPI (BlackArrow Prospero) modminer Enable support for mining with ModMiner FPGAs nanofury Enable support for mining with NanoFury USB sticks opencl Enable support for mining with OpenCL-capable devices (GPUs) proxy Enable support for virtual proxy device proxy_getwork Enable proxy support for getwork protocol (often used with Block Erupter Blades) proxy_stratum Enable proxy support for stratum protocol rockminer Enable support for mining with RockMiner devices screen Provide start-bfgminer.sh script to launch BFGMiner in app-misc/screen scrypt Enable support for scrypt mining algorithm sha256d Enable support for SHA256d mining algorithm twinfury Enable support for mining with Twinfury USB sticks udev-broad-rules Enable broader udev rules that may match non-mining devices x6500 Enable support for mining with X6500 FPGAs zeusminer Enable support for mining with ZeusMiner units ztex Enable support for mining with Ztex FPGAs bird client Build the ncurses/readline full featured CLI casync fuse Enable fuse support man Build and install man pages cfengine libvirt Enable support for virtual machine management through app-emulation/libvirt masterfiles Install the Masterfiles Policy Framework qdbm Use dev-db/qdbm as database backend tokyocabinet Use dev-db/tokyocabinet as database backend cgminer ants1 Enable support for Antminer S1 Bitmain ants2 Enable support for Antminer S2 Bitmain ants3 Enable support for Antminer S3 Bitmain avalon Enable support for Avalon ASICs avalon-miner Enable support for Avalon miner ASICs avalon2 Enable support for Avalon2 ASICs avalon4 Enable support for Avalon4 ASICs avalon7 Enable support for Avalon7 ASICs bab Enable support for BlackArrow Bitfury bflsc Enable support for BFL ASICs bitforce Enable support for mining with ButterFly Labs BitFORCE FPGAs bitfury Enable support for mining with BitFury ASICs bitmine_A1 Enable support for mining with Bitmine.ch A1 ASICs blockerupter Enable support for mining with BlockRupter ASICs cointerra Enable support for mining with Cointerra ASICs drillbit Enable support for mining with Drillbit BitFury ASICs hashfast Enable support for mining with Hashfast hashratio Enable support for mining with Hashratio icarus Enable support for mining with Icarus FPGAs klondike Enable support for mining with Klondik ASICs knc Enable support for mining with KnC miners minion Enable support for mining with BlackArrow Bitfury modminer Enable support for mining with ModMiner FPGAs sp10 Enable support for Spondoolies SP10 sp30 Enable support for Spondoolies SP30 chrony cmdmon Support for command and monitoring html Install HTML documentation nettle Use dev-libs/nettle for hash functions ntp Support for the Network Time Protocol (NTP) phc Support for the PTP (Precision Time Protocol) Hardware Clock (PHC) interface pps Support for the Linux Pulse Per Second (PPS) interface refclock Support for reference clocks rtc Support for the Linux Real Time Clock interface sechash Enable support for hashes other than MD5 connman ethernet Enable ethernet support. iptables Use net-firewall/iptables as firewall. iwd Enable wifi support via net-wireless/iwd l2tp Use net-dialup/xl2tpd for L2TP VPN support. nftables Use net-firewall/nftables as firewall. ofono Use net-misc/ofono for telephony support. openconnect Use net-vpn/openconnect for VPN support. openvpn Use net-vpn/openvpn for openvpn support. pptp Use net-dialup/pptpclient for PPTP VPN support. tools Enable testing tools. vpnc Use net-vpn/vpnc for cisco VPN support. wireguard Enable WireGuard VPN support. wispr Enable support for WISPr hotspot logins. connman-gtk openconnect Support easier authentication to AnyConnect VPNs csync sftp Enable sftp transfer support via net-libs/libssh curl alt-svc Enable alt-svc support brotli Enable brotli compression support ftp Enable FTP support gnutls Enable gnutls ssl backend gopher Enable Gopher protocol support http2 Enable HTTP/2.0 support imap Enable Internet Message Access Protocol support mbedtls Enable mbedtls ssl backend metalink Enable metalink support nghttp3 Enable HTTP/3.0 support using net-libs/nghttp3 and net-libs/ngtcp2 nss Enable nss ssl backend openssl Enable openssl ssl backend pop3 Enable Post Office Protocol 3 support progress-meter Enable the progress meter quiche Enable HTTP/3.0 support using net-libs/quiche rtmp Enable RTMP Streaming Media support smtp Enable Simple Mail Transfer Protocol support ssh Enable SSH urls in curl using libssh2 ssl Enable crypto engine support (via openssl if USE='-gnutls -nss') telnet Enable Telnet protocol support tftp Enable TFTP support winssl Enable winssl ssl backend zstd Enable zstd compression dahdi flash Support (short) flash on FXS oslec Enable OSLEC (software) echo canceller (require ECHO in kernel) dahdi-tools ppp Enables PPP/DAHDIRAS support dhcp client Install the dhclient program server Install the dhcpd and dhcrelay programs dhcpcd embedded Embed the definitions of dhcp options in the dhcpcd executable privsep Enable support for privilege separation dhcpcd-ui gtk2 Build with x11-libs/gtk+ version 2 instead of version 3 dibbler resolvconf Use resolvconf to handle /etc/resolv.conf updates dropbear bsdpty Add support for legacy BSD pty's rather than dynamic UNIX pty's -- do not use this flag unless you are absolutely sure you actually want it multicall Build all the programs as one little binary (to save space) shadow Enable shadow password support electron-cash audio_modem Enable plugin to support Audio Modem cli Enables the CLI interface cosign Enable plugin to support multisig wallets between multiple Electrum clients digitalbitbox Enable plugin to support Digital Bitbox hardware wallet email Enable plugin to support emailing invoices qrcode Enable QR code scanning with media-gfx/zbar sync Enable plugin to sync wallet metadata across multiple Electrum clients vkb Enable plugin for virtual keyboard electrum cli Enables the CLI interface qrcode Enable QR code scanning with media-gfx/zbar electrum-ltc audio_modem Enable plugin to support Audio Modem cli Enables the CLI interface cosign Enable plugin to support multisig wallets between multiple Electrum clients digitalbitbox Enable plugin to support Digital Bitbox hardware wallet email Enable plugin to support emailing invoices qrcode Enable QR code scanning with media-gfx/zbar sync Enable plugin to sync wallet metadata across multiple Electrum clients vkb Enable plugin for virtual keyboard etherdfs tsr Build the TSR program for DOS, which acts as a client. ethflop tsr Build the TSR program for DOS, which acts as a client. eventd libcanberra Enable plugin for sounds via media-libs/libcanberra libnotify Enable plugin to relay events to notification daemon (Note: not required for local notifications via net-misc/eventd) notification Enable plugin to display on-screen notifications purple Enable plugin for IM notifications via libpurple speech Enable plugin for Text-To-Speech support webhook Enable plugin to send payloads to webhook handlers websocket Enable support for WebSocket protocol fatrat bittorrent Use the bittorrent protocol via net-libs/libtorrent-rasterbar. felix bird Use BIRD, e.g. for route reflection freerdp openh264 Enable H.264 support using media-libs/openh264 server Build server binaries gerbera curl Support HTTP media sources (e.g. internet radio) exiv2 Use media-gfx/exiv2 to extract EXIF information ffmpegthumbnailer Enable video thumbnail support with media-video/ffmpegthumbnailer lastfm Enable last.fm support mysql Use dev-db/mysql as backend rather than SQLite3 taglib Use media-libs/taglib for reading files' metadata gnome-online-miners flickr Enable Flickr support gsasl gcrypt Use dev-libs/libgcrypt for low-level crypto ntlm Add support for Microsoft's NTLM mechanism using net-libs/libntlm htbinit esfq Add support for Enhanced Stochastic Fairness queueing discipline. hylafaxplus html Convert faxes into html email jbig JBIG Fax Compression Support mgetty Receive faxes via serial port connections pam hfaxd authentication via PAM icecast kate Add karaoke and text encapsulation support for Ogg files logrotate Install support files for app-admin/logrotate? yp Build support for yp public directory listings iputils SECURITY_HAZARD Allow non-root users to flood (ping -f). This is generally a very bad idea. arping Build and install arping -- tool for sending ARP requests to peers (see also net-analyzer/arping) clockdiff Build and install clockdiff -- tool for comparing clocks via ICMP packets gcrypt Use dev-libs/libgcrypt for md5 support nettle Use dev-libs/nettle for md5 support rarpd Build and install rarpd -- server for handling RARP (reverse ARP) requests; generally only used by old systems rdisc Build and install rdisc -- server for the client side of the ICMP router discover protocol tftpd Build and install tftpd -- server for the Trivial File Transfer Protocol (see also net-ftp/tftp-hpa) tracepath Build and install tracepath -- tool for tracing network paths for discovering MTU values traceroute6 Build and install deprecated traceroute6 tool. It's recommended to use net-analyzer/traceroute instead. kafka-bin internal-zookeeper Use bundled local zookeeper instance kafkacat avro Enable avro serialization/deserialization support json Enable json support kea openssl Use dev-libs/openssl instead of Botan samples Install sample configuration files knock server Installs the knockd server daemon. lcr asterisk net-misc/asterisk channel driver gsm-bs net-wireless/openbsc driver gsm-ms net-wireless/osmobb driver gsmhr Support for GSM HR codec using reference code (very slow) misdn net-misc/misdn driver sip SIP support ss5 CCITT No. 5 support libteam zmq Build witch net-libs/zeromq support lldpd cdp Enable Cisco Discovery Protocol dot1 Enable Dot1 extension (VLAN stuff) dot3 Enable Dot3 extension (PHY stuff) edp Enable Extreme Discovery Protocol fdp Enable Foundry Discovery Protocol graph Create dot graphs in documentations lldpmed Enable LLDP-MED extension old-kernel Enable compatibility with Linux kernel older than 2.6.39 sanitizers Enable code instrumentation with selected sanitizers snmp Enable the use of SNMP sonmp Enable SynOptics Network Management memcached slabs-reassign Allow manual reassignment of memory slabs at the cost of slab optimizations. minidlna netgear Enable netgear branding readynas Enable readynas branding miniupnpd igd2 Build for IGDv2 instead of an IGDv1 leasefile Enable lease file. nftables Use net-firewall/nftables rather than net-firewall/iptables. pcp-peer Enable support for PCP-PEER to allow NAT-PMP clients to mangle their packets. portinuse Check if a port is in use before allowing a NAT-PMP client to map it. strict Be more strict regarding compliance with UPnP specifications. modemmanager mbim Enable MBIM modem protocol qmi Enable support for the QMI modem protocol used by devices with Qualcomm chipsets mosh client Build network client examples Include example scripts mosh-hardening Enable compiler and linker options to frustrate memory corruption exploits server Build network server ufw Install net-firewall/ufw rule set utempter Include libutempter support mrouted rsrr Enable Routing Support for Resource Reservations, for RSVP mulk checksum Enable checksum verification for Metalink from dev-libs/openssl metalink Enable support for media-libs/libmetalink netkit-bootparamd libtirpc Build against net-libs/libtirpc for RPC support networkmanager concheck Enable connectivity checking support connection-sharing Use net-dns/dnsmasq and net-firewall/iptables for connection sharing dhclient Use dhclient from net-misc/dhcp for getting ip dhcpcd Use net-misc/dhcpcd for getting ip elogind Use sys-auth/elogind for session tracking iwd Use net-wireless/iwd instead of net-wireless/wpa_supplicant for wifi support by default json Enable JSON validation via dev-libs/jansson in libnm. libpsl Link against libpsl lto Link-time optimization modemmanager Enable support for mobile broadband devices using net-misc/modemmanager nss Use dev-libs/nss for cryptography ofono Use net-misc/ofono for telephony support. ovs Enable OpenVSwitch support ppp Enable support for mobile broadband and PPPoE connections using net-dialup/ppp resolvconf Use net-dns/openresolv for managing DNS information in /etc/resolv.conf. Generally, a symlink to /run/NetworkManager/resolv.conf is simpler. On systems running systemd-resolved, disable this flag and create a symlink to /run/systemd/resolve/stub-resolv.conf. teamd Enable Teamd control support tools Build cli tools such as nmcli, nmtui and nm_cloud_setup wext Enable support for the deprecated Wext (Wireless Extensions) API; needed for some older drivers (e.g. ipw2200, ndiswrapper) wifi Enable support for wifi and 802.1x security nextcloud-client dolphin Install the kde-apps/dolphin extension nautilus Install the gnome-base/nautilus extension shibboleth Build support for Shibboleth single sign-on ntp openntpd Allow ntp to be installed alongside openntpd parse-clocks Add support for PARSE clocks samba Provide support for Samba's signing daemon (needed for Active Directory domain controllers) ntpsec early Drop root privileges early gdb Enable debugging with gdb heat Install contrib heat generating scripts libbsd Use libbsd instead of internal funcs nist Set local clock deps ntpviz Make visualizations of offsets, jiffies, etc. rclock_arbiter Arbiter 1088A/B GPS driver rclock_generic Enable support for generic time radios and GPSDOs rclock_gpsd Enable gpsd daemon support rclock_hpgps Hewlett Packard GPS driver rclock_jjy JJY driver rclock_local Support for undisciplined local clock (not recommended) rclock_modem NIST/USNO/PTB Modem Time Services rclock_neoclock NeoClock4X DCF77/TDF driver rclock_nmea NMEA GPS driver rclock_oncore Oncore driver rclock_pps PPS cesium clock driver rclock_shm Obtain refclock info from shared memory-segment rclock_spectracom Spectracom driver rclock_trimble Trimble driver rclock_truetime Trutime driver (deprecated) rclock_zyfer Zyfer driver smear Specify the interval over which a leap second is applied (experimental) tests Enable tests ofono atmodem ETSI AT modem support. bluetooth Enable Bluetooth modem support using net-wireless/bluez. cdmamodem Enable CDMA modem support. datafiles Enable install configuration and data files. dundee Enable BlueTooth DUN deamon support. isimodem Enable PhoNet/ISI modem support. phonesim Enable phone Simulator support provision Enable GPRS provisioning support qmimodem Enable Qualcomm QMI modem support tools Enable testing tools oidentd masquerade Enable support for masqueraded/NAT connections olsrd pud Install the Node Position Update plugin openntpd libressl Enable HTTPS TLS time constraint support using dev-libs/libressl openssh X509 Adds support for X.509 certificate authentication bindist Disable EC/RC5 algorithms in OpenSSL for patent reasons. hpn Enable high performance ssh ldns Use LDNS for DNSSEC/SSHFP validation. livecd Enable root password logins for live-cd environment. scp Enable scp command with known security problems. See bug 733802 security-key Include builtin U2F/FIDO support ssl Enable additional crypto algorithms via OpenSSL xmss Enable XMSS post-quantum authentication algorithm openvswitch monitor Build the Python and GUI dependent monitor applications owncloud-client dolphin Install the kde-apps/dolphin extension nautilus Install the gnome-base/nautilus extension shibboleth Build support for Shibboleth single sign-on packETH cli Build and install packETHcli plowshare view-captcha View captcha with aview ps3mediaserver multiuser Allow renderer customization per-user. transcode Install optional dependencies for transcoding support via media-video/mplayer tsmuxer Install optional dependencies for transcoding support via media-video/tsmuxer ptpd debug Enable debugging informations experimental Enable experimental features ntp Enable NTPD cooperation pcap Require net-libs/libpcap to allow layer 2 (raw Ethernet) transport slave-only Enable slave only operation (remove master mode functionality) snmp Require net-analyzer/net-snmp to enable SNMP configuration statistics Enable compution of statistics putty gssapi Enable support for GSSAPI (virtual/krb5) gtk Build the PuTTY client which requires x11-libs/gtk+. If disabled only the CLI tools puttygen, plink, pscp and psftp will be built gtk2 Build the PuTTY client with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 quagga bgpclassless Apply unofficial patch to enable classless prefixes for BGP. Patch and information to be found at http://hasso.linux.ee/doku.php/english:network:quagga fpm Enable Forwarding Plane Manager support multipath Enable multipath routes support for any number of routes nhrpd Build Next Hop Resolution Protocol daemon ospfapi Enable OSPFAPI support for client applications accessing the OSPF link state database pam Add support for PAM (via sys-libs/pam) to the Quagga Virtual Terminal Interface Shell (vtysh); if the readline USE flag is disabled, this flag is ignored protobuf Enable support for dev-libs/protobuf readline Enable support for sys-libs/readline to provide the Quagga Virtual Terminal Interface Shell (vtysh) tcp-zebra Enable TCP zserv interface on port 2600 for Zebra/protocol-daemon communication. Unix domain sockets are chosen otherwise rdesktop kerberos Enable CredSPP support + Kerberos authentication pcsc-lite Enable smartcard support with sys-apps/pcsc-lite driver xrandr Enable XRandR window extension support remmina kwallet Enable KDE Wallet plugin spice Support connecting to SPICE-enabled virtual machines ssh Enable support for SSH/SFTP protocol telepathy Enable telepathy support rsync stunnel Provide helper scripts for using rsync via >=net-misc/stunnel-4 system-zlib Use system zlib instead of bundled one. This is incompatible with older rsync releases! xxhash Enable dev-libs/xxhash support for hashing rygel tracker Install dependencies for the tracker plugin transcode Install dependencies for transcoding support scponly chroot Enables adding and configuring an 'scponlyc' chrooted user gftp Enables gFTP compatibility logging Enables SFTP logging compatibility passwd Enables passwd compatibility quota Enables quota compatibility rsync Enables rsync compatibility with potential security risks scp Enables scp compatibility with potential security risks sftp Enables SFTP compatibility subversion Enables Subversion compatibility with potential security risks unison Enables Unison compatibility with potential security risks wildcards Enables wildcard processing with potential security risks winscp Enables WinSCP 2.0 compatibility with potential security risks seafile-client shibboleth Build support for Shibboleth single sign-on sipp pcap Enable functionality to replay RTP data from a pcap file sitecopy rsh This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred. webdav Enable WebDav (Web-based Distributed Authoring and Versioning) support. This system allows users to collaborate on websites using a web based interface. See the ebuild for an FAQ page. Enables neon as well to handle webdav support. sks optimize Enables bytecode optimization sntpd adjtimex Install adjtimex for the clock adjustment algorithm. spice-gtk gtk3 Build the spice client (spicy), requires x11-libs/gtk+:3 mjpeg Enable builtin mjpeg video decoder policykit Enable sys-auth/polkit support for the usbredir acl helper usbredir Use sys-apps/usbredir to redirect USB devices to another machine over TCP webdav Support for folder-sharing between guest and client using net-libs/phodav sshrc mosh Install Support for mosh stargazer debug Enable extra debug codepaths, like asserts and extra output. module_auth_always_online Enable build of "Always Online" authentication module for Stargazer. module_auth_freeradius Enable build of "Radius" authentication module for Stargazer. This module capable of using RADIUS procotol for user authentication. module_auth_internet_access Enable build of "InetAccess" authentication module for Stargazer. InetAccess is a Stargazer specific authentication protocol. module_capture_ether Enable build of "Ethernet" traffic capture module for Stargazer. This module uses RAW sockets to capture traffic. module_capture_ipq Enable build of "IPQ" traffic capture module for Stargazer. This module uses IPQ subsystem to capture traffic. module_capture_netflow Enable build of "NetFlow" traffic capture module for Stargazer. This module capable of receiving traffic data by NetFlow protocol. module_config_rpcconfig Enable build of "XMLRPC" configuration module for Stargazer. This module uses XML-RPC protocol for configuring Stargazer. module_config_sgconfig Enable build of "SGConf" configuration module for Stargazer. This module uses Stargazer specific protocol for configuring Stargazer. module_other_ping Enable build of "Ping" module for Stargazer. This module pings connected users from time to time to ensure they are alive. module_other_remote_script Enable build of "Remote Script" module for Stargazer. This module control rscriptd daemon over the net and makes it execute scripts in reaction to different Stargazer events. module_other_smux Enable build of SMUX module for Stargazer. This module uses SMUX protocol to provide various information about Stargazer. module_store_files Enable build of storage plugin for Stargazer based on plain files. module_store_firebird Enable build of storage plugin for Stargazer, which uses Firebird database for storage. module_store_mysql Enable build of storage plugin for Stargazer, which uses MySQL for storage. module_store_postgres Enable build of storage plugin for Stargazer, which uses PostgreSQL for storage. radius Enable build of FreeRADIUS module for data access via Stargazer. rscriptd Enable build of remote script execute daemon for Stargazer, which run scripts when receive special signal from Stargazer. sgauth Enable build of command-line utility for authorization in Stargazer. sgconf Enable build of command-line utility for configuring Stargazer. sgconf_xml Enable build of command-line xml-based utility for configuring Stargazer. sgconv Enable build of utility to convert Stargazer data between storage backends. stargazer Enable build of Stargazer billing system. streamtuner shout Enable shoutcast plug-in. xiph Enable xiph.org plug-in. stunnel stunnel3 Install the stunnel3 wrapper. tigervnc dri3 Build with DRI3 support drm Build with DRM support server Build TigerVNC server xorgmodule Build the Xorg module uftp server Install uftp server daemon vde pcap Enable the pcap-based plugin that allows creating a switch against a real interface. ssl Enable the cryptcab plugin that allows creating an encrypted virtual cable. vinagre spice Enable access to SPICE-enabled virtual machines ssh Enable ssh plugin using x11-libs/vte telepathy Enable access to remote desktop via a net-libs/telepathy-glib client vino telepathy Enable desktop sharing through a telepathy client wget cookie_check Enable cookie checks via net-libs/libpsl metalink Enable support for media-libs/libmetalink ntlm Enable support for NTLM (Windows-based) authorization uuid Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator) wget2 brotli Enable support for brotli compression gpgme Build gpgme backend http2 Enable HTTP/2.0 support openssl Enable crypto support via dev-libs/openssl psl Use public suffix list via media-libs/libnspsl valgrind Depend on dev-util/vagrind for test suite whois xcrypt Enable crypt through sys-libs/libxcrypt package x2goserver fuse Use net-fs/sshfs to allow shared folders youtube-viewer gtk Install the gtk3 GUI gtk2 Use the old gtk2 GUI instead of the gtk3 one zerotier clang Use Clang compiler instead of GCC neon Enable ARM32 neon-salsa2012-asm code net-nds ldapvi gnutls Use net-libs/gnutls instead of dev-libs/openssl nsscache nsscache Depend on sys-auth/libnss-cache to handle flat files s3 Support for S3-based NSS sources openldap experimental Enable experimental backend options kinit Enable support for kerberos init minimal Build libraries & userspace tools only. Does not install any server code odbc Enable ODBC and SQL backend options overlays Enable contributed OpenLDAP overlays pbkdf2 Enable support for pbkdf2 passwords sha2 Enable support for pw-sha2 password hashes smbkrb5passwd Enable overlay for syncing ldap, unix and lanman passwords rpcbind remotecalls Enable remote calls warmstarts Enables rpcbind to cache configuration for warm restarts tac_plus finger Adds support for checking user counts via fingering the NAS maxsess Enforce a limit on maximum sessions per user net-news rssguard webengine Use dev-qt/qtwebengine for embedded web browser net-nntp nzbget parcheck Enable support for checking PAR archives sabnzbd 7za Add support for extracting 7za files rar Add support for extracting rar files unzip Add support for extracting zip files slrn canlock Add support for cancel locks via net-libs/canlock uudeview Add support for yEnc coding and more using dev-libs/uulib tin cancel-locks Enable Cancel-Lock header functionality (also enables USE=evil) etiquette Enable the display off posting etiquettes gpg Enable app-crypt/gnupg support mime Add MIME support net-p2p airdcpp-webclient nat-pmp Enable support for the NAT-PMP protocol tbb Enable support of the TBB library to improve performance webui Enable the Web UI amule daemon Enable amule daemon remote Enable remote controlling of the client stats Enable statistic reporting bitcoin-cli knots Build enhanced Bitcoin Knots version, rather than Bitcoin Core bitcoin-qt asm Enable assembly for optimization bip70 Enable support for the BIP70 payment protocol knots Build enhanced Bitcoin Knots version, rather than Bitcoin Core libevent Use dev-libs/libevent (needed for JSON-RPC, REST, and Tor auto-configuration qrcode Enable generation of QR Codes for receiving payments system-leveldb Use the system-wide dev-libs/leveldb instead of bundled upnp Enable Universal Plug and Play wallet Enable wallet support zeromq Report blocks and transactions via zeromq bitcoind asm Enable assembly for optimization knots Build enhanced Bitcoin Knots version, rather than Bitcoin Core system-leveldb Use the system-wide dev-libs/leveldb instead of bundled upnp Enable Universal Plug and Play wallet Enable wallet support zeromq Report blocks and transactions via zeromq dbhub switch-user Enable support for switching user deluge console Enable default console UI webinterface Install dependencies needed for the web interface eiskaltdcpp cli Enable sample cli based on readline daemon Enable eiskaltdcpp-daemon dht Enable DHT (distributed hash table) support for libeiskaltdcpp json Enable JSON for cli and daemon libcanberra Enable sound notifications support over libcanberra in EiskaltDC++ Gtk minimal Don't install headers fms frost Add support for frost boards ssl Add support for FCP connection over SSL freenet nss Use nss for crypto operations, if it is the fastest way go-ethereum devtools Build Ethereum development tools (evm, abigen, puppeth, ...) ktorrent bwscheduler Schedule upload and download limits over a period of a week downloadorder Specify the download order of a multi-file torrent infowidget Displays general information about a torrent in several tabs ipfilter Filter IP addresses through a blocklist kross Enable kross scripting support logviewer Displays the logging output magnetgenerator Generates magnet URI's mediaplayer Phonon-based media player rss Syndication plugin for KTorrent, supporting RSS and Atom feeds scanfolder Scan folders for torrent files and load them search Search for torrents shutdown Shutdown when done stats Shows statistics about torrents in several graphs upnp Forward ports using UPnP zeroconf Discover peers on the local network using the Zeroconf protocol litecoind logrotate Use app-admin/logrotate for rotating logs wallet Enable wallet support mldonkey bittorrent enable bittorrent support fasttrack enable fasttrack support gnutella enable gnutella and gnutella2 support guionly enable client build only qbittorrent webui Enable the Web UI resilio-sync pax_kernel Use paxctl to mark binaries retroshare cli Enables the CLI version of RetroShare control-socket Enables API via Unix socket support gnome-keyring Enables potentially insecure autologin capability via Gnome Keyring jsonapi Enables the new RetroShare JSON API service Enables the new RetroShare service controllable only through JSON API sqlcipher Enables GXS database encryption via SQLCipher webui Enables Web interface and API support xapian Enables GXS content indexing and search through Xapian rtorrent daemon Uses app-misc/screen to daemonize this application syncthing tools Install stdiscosrv, strelaysrv and other tools to /usr/libexec/syncthing/. transmission lightweight Optimize transmission for low-resource systems (smaller cache size, prefer unencrypted peer connections, etc.) mbedtls Use mbed TLS instead of OpenSSL transmission-remote-gtk libproxy Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration. xmr-stak cuda Enable NVIDIA CUDA toolkit support devfee Enable payment of devfee to the developer hwloc Enable CPU affinity support via hwloc opencl Enable OpenCL support webserver Enable internal webserver xmr-stak-rx cuda Enable NVIDIA CUDA toolkit support hwloc Enable CPU affinity support via hwloc opencl Enable OpenCL support webserver Enable internal webserver net-print cups lprng-compat Do not install lp... binaries so cups and lprng can coexist. cups-filters foomatic Build the included foomatic-rip printer driver. Strongly recommended. pclm Enable PCLm support dymo-cups-drivers usb_modeswitch Include usb_modeswitch for some hardware (bug #601242) fax4cups efax Install net-misc/efax backend hylafax Install net-misc/hylafax backend mgetty-fax Install net-dialup/mgetty backend hplip X Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends fax Enable fax on multifunction devices which support it hpcups Build the hpcups driver for cups (by HP) hpijs Build the IJS driver for cups (Foomatic) kde Enables kde-misc/skanlite as scanner GUI with USE="scanner X" libnotify Enables desktop notifications libusb0 Depend on virtual/libusb SLOT 0. Some old printers do not work with virtual/libusb SLOT 1. minimal Only build internal hpijs/hpcups driver (not recommended at all, make sure you know what you are doing) parport Enable parallel port for devices which require it scanner Enable scanner on multifunction devices which support it snmp Add support for net-analyzer/net-snmp which enables this driver to work over networks (both for server and client) static-ppds Use statically-generated PPDs instead of Dynamic PPDs. Although this is deprecated some printers may still need it to work properly. Use this flag if hp-setup fails to find/create a valid PPD file hplip-plugin orblite Install the ORBlite scanner plugin kyocera-1x2x-mfp-driver rastertokpsl-fix Use custom wrapper script to sanitize arguments before passing to 'rastertokpsl' filter program net-proxy haproxy 51degrees Device Detection using 51 Degrees device-atlas Use dev-libs/device-atlas-api-c library net_ns Enable network namespace support (CONFIG_NET_NS) pcre-jit Use JIT support for PCRE pcre2 Enable PCRE2 RegEx support pcre2-jit Use JIT support for PCRE2 prometheus-exporter Also build the prometheus exporter slz Use dev-libs/libslz compression library tools Install additional tools (halog, iprange) wurfl Device Detection using WURFL privoxy client-tags Enable support for client-specific tags compression Allow privoxy to compress buffered content before sending to the client, if it supports it editor Enable the web-based actions file editor extended-host-patterns Enable and require PCRE syntax in host patterns. You must convert action files to PCRE, see privoxy-url-pattern-translator.pl Use at your own risk! external-filters Allow to filter content with scripts and programs. Experimental fast-redirects Support fast redirects force Allow single-page disable (force load) fuzz Exposes Privoxy internals to input from files or stdout. Intended for fuzzing testing graceful-termination Allow to shutdown Privoxy through the webinterface ie-images Enable a quick but not always reliable auto-detect whether requests from MS Internet Explorer are for an image or not image-blocking Allows the +handle-as-image action, to send "blocked" images instead of HTML lfs Support large files (>2GB) on 32-bit systems png-images Use PNG format instead of GIF for built-in images stats Keep statistics toggle Support temporary disable toggle via web interface tools Install log parser, regression tester and user agent generator tools whitelists Support trust files (white lists) zlib Use sys-libs/zlib to decompress data before filtering rejik banlists Install upstream provided simple banlists squid ecap Adds support for loadable content adaptation modules (http://www.e-cap.org) esi Enable ESI for accelerators, will cause squid reverse proxies to be capable of the Edge Acceleration Specification (www.esi.org) htcp Enable HTCP protocol ipf-transparent Adds transparent proxy support for systems using IP-Filter (only for *bsd) kqueue Enables *BSD kqueue() support logrotate Use app-admin/logrotate for rotating logs pf-transparent Adds transparent proxy support for systems using PF (only for *bsd) qos Adds support for Quality of Service using netfilter conntrack - see qos_flow directive for more info ssl-crtd Adds support for dynamic SSL certificate generation in SslBump environments tproxy Enables real Transparent Proxy support for Linux Netfilter TPROXY wccp Enable Web Cache Coordination Protocol wccpv2 Enable Web Cache Coordination V2 Protocol tinyproxy filter-proxy Enable filtering of domains/URLS reverse-proxy Enable reverse proxying transparent-proxy Enable transparent proxying upstream-proxy Enable upstream proxying xtinyproxy-header Include the X-Tinyproxy header trojan mysql build with MySQL support tsocks dns Force DNS queries to use SOCKS server via tcp envconf Allow TSOCKS_CONF_FILE to specify configuration file server-lookups Allow hostname resolution _for_ SOCKS servers tordns Apply tordns patch which allows transparent TORification of the DNS queries net-voip telepathy-gabble jingle Enable voice calls for jabber plugins Enable plugin loader yate amrnb use AMR-NB dahdi Enable Dahdi driver gsm use GSM codec ilbc Enable iLBC codec ilbc-webrtc Enable iLBC webrtc codec isac-fixed Enable iSAC fixed codec isac-float Enable iSAC float codec mysql use MySQL client library postgres use Postgress SQL spandsp use spandsp library speex use Speex codec tdmcard Enable TDMV API card driver wanpipe Enable Wanpipe support wpcard Enable Wanpipe card driver zaptel Enable Zaptel driver net-vpn badvpn client Build the badvpn-client program, a daemon that runs on endpoints of the VPN. ncd Build NCD, a lightweight scripting language especially suited for network configurations. server Build the badvpn-server program, a central server that manages the VPN network. tun2socks Build tun2socks, a program which implements a TUN device that forwards TCP traffic through a SOCKS5 server. udpgw Build udpgw, a small daemon which allows tun2socks to forward UDP traffic. i2p nls Adds Native Language Support using GNU gettext. i2pd i2p-hardening Compile with hardening on vanilla compilers/linkers ipsec-tools hybrid Makes available both mode-cfg and xauth support idea Enable support for the IDEA algorithm nat Enable NAT-Traversal rc5 Enable support for the patented RC5 algorithm stats Enable statistics reporting libreswan dnssec Use DNSSEC resolver (requires net-dns/unbound) ocserv otp Enable support for one-time passwords openconnect gssapi Build GSSAPI support libproxy Enable proxy support stoken Enable stoken support openvpn down-root Enable the down-root plugin iproute2 Enabled iproute2 support instead of net-tools mbedtls Use mbed TLS instead of OpenSSL pkcs11 Enable PKCS#11 smartcard support plugins Enable the OpenVPN plugin system pptpd gre-extreme-debug Log all GRE accepted packets when in debug mode (required if you want upstream support) strongswan constraints Enable advanced X.509 constraint checking plugin dhcp Enable server support for querying virtual IP addresses for clients from a DHCP server. (IKEv2 only) eap Enable support for the different EAP modules that are supported farp Enable faking of ARP responses for virtual IP addresses assigned to clients (IKEv2 only) gcrypt Enable dev-libs/libgcrypt plugin which provides 3DES, AES, Blowfish, Camellia, CAST, DES, Serpent and Twofish ciphers along with MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+). Also includes a software random number generator. non-root Force IKEv1/IKEv2 daemons to normal user privileges. This might impose some restrictions mainly to the IKEv1 daemon. Disable only if you really require superuser privileges. openssl Enable dev-libs/openssl plugin which is required for Elliptic Curve Cryptography (DH groups 19-21,25,26) and ECDSA. Also provides 3DES, AES, Blowfish, Camellia, CAST, DES, IDEA and RC5 ciphers along with MD2, MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+) dev-libs/openssl has to be compiled with USE="-bindist". pkcs11 Enable pkcs11 support strongswan_plugins_aesni Enable support for Intel AES-NI crypto plugin strongswan_plugins_blowfish Enable support for the blowfish plugin strongswan_plugins_bypass-lan Enable support for the bypass-lan plugin strongswan_plugins_ccm Enable support for the ccm plugin strongswan_plugins_chapoly Enable ChaCha20/Poly1305 AEAD implementation and ChaCha20 XOF plugin strongswan_plugins_ctr Enable support for the ctr plugin strongswan_plugins_forecast Enable multicast and broadcast forwarding plugin strongswan_plugins_gcm Enable support for the gcm plugin strongswan_plugins_ha Enable support for the ha plugin strongswan_plugins_ipseckey Enable support for the ipseckey plugin strongswan_plugins_led Enable support for the led plugin strongswan_plugins_lookip Enable support for the lookip plugin strongswan_plugins_newhope Enable plugin that allows key exchange based on post-quantum computer New Hope algorithm strongswan_plugins_ntru Enable support for the ntru plugin strongswan_plugins_padlock Enable support for the padlock plugin strongswan_plugins_rdrand Enable support for the rdrand plugin strongswan_plugins_save-keys Enable plugin that saves IKE and/or ESP keys to files compatible with Wireshark (for debugging) strongswan_plugins_systime-fix Enable support for the systime-fix plugin strongswan_plugins_unbound Enable support for the unbound plugin strongswan_plugins_unity Enable support for the unity plugin strongswan_plugins_vici Enable support for the vici plugin strongswan_plugins_whitelist Enable support for the whitelist plugin tinc uml Enable support for User Mode Linux Sockets vde Enable Virtual Distributed Ethernet (VDE) based networking tor man Build and install man pages scrypt Use app-crypt/libscrypt for the scrypt algorithm server Enable tor's relay module so it can operate as a relay/bridge/authority tor-hardening Compile tor with hardening on vanilla compilers/linkers vpnc resolvconf Enable support for DNS managing framework net-dns/openresolv wireguard-modules debug Enable verbose debug reporting in dmesg of various WireGuard peer and device information. module Compile the actual WireGuard kernel module. Most certainly you want this enabled, unless you're doing something strange. module-src Install the module source code to /usr/src, in case you like building kernel modules yourself. wireguard-tools wg-quick Install the wg-quick(8) helper tool. Most users want to use this. net-wireless aircrack-ng airdrop-ng Build airdrop-ng airgraph-ng Build airgraph-ng experimental Build the "experimental" tools which may randomly fail to run properly netlink Use netlink for channel control instead of WEXT bladerf tecla use libtecla for command line editing, tab completion, and history bladerf-fpga x115 bitstream for the x115 kLE Cyclone IV FPGA bladerf model" x40 bitstream for the x40 kLE Cyclone IV FPGA bladerf model" xA4 bitstream for the xA4 49 kLE Cyclone V FPGA bladerf 2.0 micro model" xA9 bitstream for the xA9 301 kLE Cyclone V FPGA bladerf 2.0 micro model" blueman network Add functionality to setup (host) PAN connections using either net-dns/dnsmasq or net-misc/dhcp bluez btpclient Enable BTP client deprecated Build deprecated plugins experimental Build experimental plugins extra-tools Install tools that upstream doesn't install on purpose by default. All this tools shouldn't be used. Then, please notify upstream about you still need them to let them know the situation. mesh Add support for Bluetooth Mesh control application and advertising bearer. midi Enable MIDI support obex Enable OBEX transfer support test-programs Install tools for testing of various Bluetooth functions user-session Allow compatibility with user-session semantics for session bus under systemd crda gcrypt Use libgcrypt instead of openssl for key checking dump1090 bladerf Build with Nuand BladeRF support rtlsdr Build with Realtek RTL2832U (rtlsdr) support gnuradio analog enable analog signal processing blocks audio enable blocks to connect to audio sources (mic-in) and sinks (speaker-out) ports on a computer channels enable channel mode blocks digital enable digital signal processing blocks dtv enable digital tv signal processing blocks fec enable block for convolutional encoding using the CCSDS standard polynomial ("Voyager") filter enable filter signal processing blocks grc enable GNU Radio Companion graphical tool to design signal processing flow graphs modtool enable modtool for editing GNU Radio modules and components performance-counters enable block performance counters trellis enable trellis blocks for FSM uhd install UHD source and sink blocks utils install scripts to enable viewing and analysis of files produced by flow graphs vocoder enable blocks for audio voice encoders wavelet enable wavelet signal processing blocks zeromq enable zeromq message passing blocks gqrx gr-audio Use audio support from net-wireless/gnuradio gr-osmosdr airspy Build with Airspy support bladerf Build with Nuand BladeRF support hackrf Build with Great Scott Gadgets HackRF support iqbalance Enable support for I/Q balancing using gr-iqbal mirisdr Build with Mirics MSi2500 + MSi001 SDR support rtlsdr Build with Realtek RTL2832U (rtlsdr) support sdrplay Enable support for SDRplay devices through net-wireless/sdrplay soapy Build with SoapySDR support uhd Build with Ettus Research USRP Hardware Driver support horst pcap Add support for network packet capture via net-libs/libpcap hostapd crda Add CRDA support internal-tls Use internal TLSv1 implementation instead of depending on OpenSSL, LibreSSL or GnuTLS logwatch Install support files for sys-apps/logwatch netlink Adding support for using netlink to create VLANs suiteb Adding support for NSA Suite B Cryptography wps Add support for Wi-Fi Protected Setup iwd client Enable iwctl client tool crda Use net-wireless/crda for regulatory domain loading instead of in-kernel (4.15+) support monitor Enable iwmon monitor tool ofono Enable support for oFono SIM authentication standalone Enable standalone mode with built-in DHCP client and DNS handling" systemd Use systemd-resolve rather than resolvconf for DNS handling in standalone mode wired Enable ethernet authentication daemon kismet libusb Support libusb based capture sources such as mousejack, cc2540(ble), and nrf51822(ble) pcre Build with pcre support rtlsdr Enable rtlsdr based kismet capture sources suid Install a setuid root helper binary with limited functionality; this allows running kismet as a normal user, significantly reducing security risks ubertooth Enable capture source for ubertooth to sniff bluetooth low energy neard tools build and install extra helper utilities openbsc gprs Support GPRS via OpenGGSN osmocom-bb transmit Enable transmission capabilities. rtl-sdr zerocopy may cause a bus error on some ARM systems rtl_433 rtlsdr Build with Realtek RTL2832U (rtlsdr) support soapysdr Build with SoapySDR support soapy_power faster Use dev-python/scipy to speed up drawing fastest Use dev-python/pyFFTW to speed up drawing to the max soapysdr bladerf Add support for bladerf hardware hackrf Add support for hackrf hardware plutosdr Add support for Analog Devices ADALM-PLUTO hardware rtlsdr Add support for rtlsdr hardware uhd Add support for Ettus USRP hardware spectools debug Build the raw output client for spectools. (for developers) gtk Build the gtk-2 based client for spectools ncurses Build the ncurses based client for spectools srslte bladerf support Nuand BladeRF hardware simcard support hardware sim cards soapysdr use soapysdr to support various hardware uhd support Ettus Research hardware zeromq enable zeromq message passing ubertooth bluez use bluez to support clock following and scanning ubertooth1-firmware Build/install ubertooth1-firmware uhd b100 support B100 hardware b200 support B200, B210, B200mini, B205mini hardware e300 support E300, E310 hardware mpmd support N300, N310 hardware n230 support N230 harware octoclock Octoclock Network Support usrp1 support USRP1 hardware usrp2 support USRP2, N200, N210 hardware utils utilities needed to list, query, calibrate, or update FPGA/Firmware x300 support X300, X310 hardware urh airspy use native backend which directly uses net-wireless/airspy audio use a soundcard instead of an sdr bladerf use native backend which directly uses net-wireless/bladerf hackrf use native backend which directly uses net-libs/libhackrf limesdr use native backend which directly uses net-wireless/limesuite plutosdr use native backend which directly uses net-libs/libiio rtlsdr use native backend which directly uses net-wireless/rtl-sdr sdrplay use native backend which directly uses net-wireless/sdrplay uhd use native backend which directly uses net-wireless/uhd wepattack john Build with app-crypt/johntheripper support wireless-tools multicall Build the most commonly used tools as one binary wpa_supplicant ap Add support for access point mode broadcom-sta Flag to help users disable features not supported by broadcom-sta driver eap-sim Add support for EAP-SIM authentication algorithm eapol-test Build and install eapol_test binary fasteap Add support for FAST-EAP authentication algorithm fils Add support for Fast Initial Link Setup (802.11ai) hs2-0 Add support for 802.11u and Passpoint for HotSpot 2.0 macsec Add support for wired macsec mbo Add support Multiband Operation mesh Add support for mesh mode p2p Add support for Wi-Fi Direct mode privsep Enable wpa_priv privledge separation binary ps3 Add support for ps3 hypervisor driven gelic wifi smartcard Add support for smartcards tdls Add support for Tunneled Direct Link Setup (802.11z) uncommon-eap-types Add support for GPSK, SAKE, GPSK_SHA256, IKEV2 and EKE wimax Add support for Wimax EAP-PEER authentication algorithm wps Add support for Wi-Fi Protected Setup yatebts bladerf Build bladeRF transceiver rad1 Build RAD1 transceiver uhd Build UHD transceiver usrp1 Build USRP1 transceiver sci-astronomy cpl gasgano Enable support for sci-astronomy/gasgano file organizer esomidas libtirpc Build against net-libs/libtirpc for RPC support healpix idl Install healpix IDL/GDL routines kstars fits Enable support for NASA's sci-libs/cfitsio library indi Enable support for Astronomical control library using libindi password Store passwords securely via dev-libs/qtkeychain wcs Enable support for World Coordinate System library using wcslib predict xforms Add a "map" client which uses the x11-libs/xforms library for its GUI xplanet Project predict data onto world maps generated by x11-misc/xplanet / x11-misc/xearth psfex plplot Build with sci-libs/plplot to allow diagnostic plots during processing scamp plplot Build with sci-libs/plplot to allow diagnostic plots during processing sextractor modelfit Enable profile model fitting, needs sci-libs/atlas and sci-libs/fftw stellarium deep-sky Install extra deep sky objects catalog (may affect performance) media Enable sound and video support stars Install extra star catalogs telescope Enable telescope control via sci-libs/indilib wcslib fits Enable support for the FITS format through sci-libs/cfitsio pgplot Builds PGBSOX routines, needs sci-libs/pgplot library tools Builds and installs extra command line utilities for WCS checking sci-biology abyss misc-haskell build abyss-samtobreak tool, pull in haskell toolchain bioperl db Install sci-biology/bioperl-run network Install sci-biology/bioperl-run run Install sci-biology/bioperl-run bowtie tbb Enables building bowtie with the Intel Threading Building Blocks from dev-cpp/tbb. This flag is recommended. clustalw-mpi mpi_njtree Use MPI (as opposed to serial) code for computing neighbor-joining trees static_pairalign Use static (as opposed to dynamic) scheduling for pair alignments exonerate utils Install all utilities fasttree double-precision use double precision instead of single-precision floating point (2x memroy required) mcl blast Add support for NCBI BLAST data seqan tools Build and install SeqAn commandline tools, such as the Yara aligner ucsc-genome-browser server Install genome browser Web application. If this flag is off, only libraries and utilities from the suite are installed. yass dmalloc Enable debugging with the dmalloc library lowmem Build for environments with low amounts of memory sci-calculators datamash linux-crypto Use Linux kernel cryptographic API openssl Use dev-libs/openssl for hash routines instead of internal gnulib units units-cur Install the units_cur python script that updates currencies sci-chemistry avogadro2 rpc Enable RPC server vtk include vtk support chemtool emf EMF export support gnome-chemistry-utils gnumeric Add a Gnumeric plugin to provide a molarmass function for the spreadsheet gromacs cuda Enable cuda non-bonded kernels double-precision More precise calculations at the expense of speed gmxapi Add support for gmxapi library gmxapi-legacy Enable installing lagacy headers hwloc Enable HWLoc lib support lmfit Use external sci-libs/lmfit mkl Use sci-libs/mkl for fft, blas, lapack routines offensive Enable gromacs partly offensive quotes opencl Enable opencl non-bonded kernels single-precision Single precision version of gromacs (default) tng Enable new trajectory format - tng molequeue client Build the client application server Build the serve application zeromq Build with net-libs/zeromq support mopac7 gmxmopac7 Add support library for gromacs pymol web Install Pymodule needed for web app support raster3d gd libgd support for PNG and JPEG output vmd cuda Use nvidia cuda toolkit for speeding up computations gromacs Add support for TNG file format msms Add support for MSMS SES calcualtion tool povray Add support for povray raytracer for HQ images tachyon Add support for tachyon raytracer for HQ images votca-csg extras Pull in extra applications from sci-chemistry/votca-csgapps gromacs Add support for gromacs file formats through sci-chemistry/gromacs sci-electronics geda stroke enable mouse gesture support gerbv unit-mm Set default unit for coordinates in status bar to mm gspiceui schematics Use sci-electronics/geda for schematics editing waveform Use sci-electronics/gwave for waveform display gtkwave fasttree Enables experimental Fast SST Tree widget code. fatlines Renders lines as double width in gtkwave. judy Enables Judy array support. packed Enables '#pragma pack' for data arrays (saves memory, costs time). kicad github Add github support into PCB editor ngspice Enable circuit simulation occ Enable viewing 3D rendering of designs via opencascade oce Enable viewing 3D rendering of designs via OCE python Enable python scripting support kicad-meta minimal Do not install extra data like 3D packages and templates. kicad-packages3d occ Use sci-libs/opencascade for data exchange oce Use sci-libs/oce for data exchange ktechlab gpsim Enable support for Microchip PIC microcontrollers similation using dev-embedded/gpsim ngspice deprecated Build old and deprecated apps shared Build ngspice as a shared library pcb gcode gcode file export gif GIF graphics export gsvit GSvit file export jpeg JPEG graphics export m4lib-png Enable creating png previews for the m4 library nelma NELMA file export png PNG graphics export tk Build tcl/tk graphical QFP footprint generator toporouter Build toporouter pulseview decode Enable decoding of protocols while capturing sigrok-cli decode Enable decoding of protocols while capturing splat hires Builds additional high resolution application 'rfsplat-hd' sci-geosciences gmt gdal Enable sci-libs/gdal library support gmttria Non GNU triangulation method, more efficient gshhg Install coastline database htmldoc Install html documentation metric Use SI (cm) units instead of US (inches) ones mex Enable compilation of mex supplement which requires Octave/Matlab octave Enable octave support pcre2 Use libpcre2 for regular expressions tutorial Install data files for tutorial gpsd dbus export gpsd data over dbus connections latency-timing support latency timing information ntp Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time shm export gpsd over shared memory sockets export gpsd over unix sockets grass geos Use sci-libs/geos for v.buffer and adds extended options to the v.select module liblas Include support for LAS and LAZ encoded LiDAR files through sci-geosciences/liblas opencl Enable OpenCL support gshhs data Add earth data with sci-geosciences/gshhs-data liblas gdal Add support for the sci-libs/gdal geospatial raster library mapnik gdal Enable sci-libs/gdal library support osmfonts Enable openstreetmaps font styles mapserver apache Enable mapserver to run under apache geos Enable sci-libs/geos library support postgis Enable dev-db/postgis support merkaartor libproxy Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration webengine Enable dev-qt/qtwebengine in some plugins qgis 3d Build QGIS 3D library using dev-qt/qt3d georeferencer Determines whether georeferencer plugin should be built grass Add support for grass hdf5 Enable MDAL support for sci-libs/hdf5 mapserver Determines whether mapserver should be built netcdf Enable MDAL support for GRIB and XMDF formats opencl Enable OpenCL support polar Enable support for the polar coordinate system via x11-libs/qwtpolar qml Enable support Qml-based plugins using dev-qt/qtdeclarative viking geoclue Use app-misc/geoclue to determine current location libexif Use media-libs/libexif for EXIF support mapnik Enable a layer based on sci-geosciences/mapnik oauth Enable OAuth authentication for OSM sqlite Enable MBTiles support based on dev-db/sqlite sci-libs ViSP coin Enables Coin3D support. demos Installs demo programs. dmtx Enables barcode data matrix support. ogre Enables dev-games/ogre support. opencv Enables media-libs/opencv support. pcl Enables sci-libs/pcl support. tutorials Installs tutorials. zbar Enables barcodes reading. adolc boost Use the boost allocator from dev-libs/boost sparse Add support for sparse matrix algebra with sci-libs/colpack armadillo arpack Link with sci-libs/arpack libraries for eigen decomposition mkl Use matrix allocation from the Intel MKL sci-libs/mkl superlu Use SuperLU for sparse linear equation solving sci-libs/superlu tbb Use matrix allocation from the Threads Building Blocks dev-cpp/tbb arprec qd Use sci-libs/qd for quad-double datatype atlas generic Build atlas assuming a fairly generic architecture (sse2 for x86, core2 for amd64) avogadrolibs archive Enable archive support using app-arch/libarchive static-plugins Build all plugins statically into main plugin modules vtk Enable sci-libs/vtk support blis 64bit-index Enable 64bit array indexing, incompatible with runtime switching eselect-ldso Enable runtime library switching by eselect and ld.so. openmp Use openmp threadding model pthread Use pthread threadding model serial Use no threadding model cantera cti Install CTI tools (ck2cti, ctml_writer) for conversion of Chemkin files to Cantera format cddlib tools Add a few executables and tests for cddlib ceres-solver cxsparse Enable simple support for sparse matrix algebra from sci-libs/cxsparse with no LAPACK dependencies gflags Use dev-cpp/gflags for flag parsing schur Enable fixed-size schur specializations (disable if binary size is an issue) sparse Enable support for sparse matrix algebra with various packages from SuiteSparse cfitsio tools Build execs fpack, funpack, imcopy, fitscopy, listhead cgnslib legacy Enable or disable building legacy code (3.0 compatible) tools A number of utility programs: cgnscheck, cgnscompress, cgnsdiff, cgnslist, cgnsnames, cgnsupdate, cgnsconvert, adf2hdf, hdf2adf. cholmod cuda Use nvidia cuda toolkit for speeding up computations matrixops Support basic sparse and dense matrix operations (add, multiply, scale, et cetera) metis Enable the Partition module to cholmod using sci-libs/metis modify Enable Cholesky-modification routines like update, downdate, row-add, and row-delete partition Enable graph partitioning and graph-partition-based orderings through sci-libs/metis or sci-libs/parmetis clblas client Build a command line clBLAS client program. ktest A command line tool for testing single clBLAS kernel. performance Copy performance scripts that can measure and graph performance. clblast client Enable compilation of the clients to test and compare performance with reference libraries coinor-bonmin glpk Undocumented USE coinor-clp glpk Enable GNU Linear Programming Kit sci-mathematics/glpk support metis Enable partitioning with sci-libs/metis mumps Enable sci-libs/mumps support sparse Enable support for sparse matrix with sci-libs/cholmod coinor-symphony glpk Enable GNU Linear Programming Kit sci-mathematics/glpk support coinor-utils glpk Enable GNU Linear Programming Kit sci-mathematics/glpk support dealii adolc Adds support for ADOL-C (sci-libs/adolc) arpack Adds support for ARPACK (sci-libs/arpack) assimp Add support for assimp (media-libs/assimp) cuda Add support for cuda (dev-util/nvidia-cuda-sdk) debug Build an additional debug library with extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see /www.gentoo.org/proj/en/qa/backtraces.xml> ginkgo Add support for ginkgo (sci-libs/ginkgo) gmsh Add support for gmsh (sci-libs/gmsh) metis Add support for metis (sci-libs/metis) muparser Add support for muparser (dev-cpp/muParser) nanoflann Adds support for nanoflann (sci-libs/nanoflann) opencascade Add support for opencascade (sci-libs/opencascade) p4est Add support for p4est (sci-libs/p4est) petsc Add support for petsc (sci-mathematics/petsc) scalapack Add support for ScaLAPACK (sci-libs/scalapack) slepc Add support for slepc (sci-mathematics/slepc) sparse Add support for suitesparse (sci-libs/suitesparse) sundials Add support for sundials (sci-libs/sundials) symengine Add support for symengine (sci-libs/symengine) tbb Add threading support with the help of the tbb library (dev-cpp/tbb) trilinos Add support for trilinos (sci-libs/trilinos) dlib cblas Build with CBLAS virtual/cblas cuda Enable support for CUDA for Deep Neural Networks (cuDNN) on GPU (experimental) mkl Enable support for Intel FFT sci-libs/mkl python Enable support for Python API bindings dmlc-core s3 Support for the Amazon Simple Storage Service eccodes defs Install full set of definition files. extra-test Install full set of test data (large). memfs Enable memory based access to definition/sample files (conflicts with tests). fcl octomap OctoMap library support profiling Enable profiling fftw float Link default library to single precision instead of double (symlinks only and fftw-2.1) quad Build quadruple precision lib zbus Adds support for ZBus cycle-counter of mips flann cuda Enable support for nVidia CUDA octave Add bindings for sci-mathematics/octave gdal armadillo Use sci-libs/armadillo for faster TPS transform computation aux-xml Enable Portable Auxilliary Metadata generation fits Enable support for NASA's sci-libs/cfitsio library geos Add support for geometry engine (sci-libs/geos) gml Enable support for dev-libs/xerces-c C++ API mdb Enable support for Microsoft Access database ogdi Enable support for the open geographic datastore interface (sci-libs/ogdi) opencl Enable OpenCL support spatialite Enable Spatial DBMS over sqlite dev-db/spatialite xls Add the dev-libs/freexl library for xls import support ginkgo cuda Add support for cuda assimp (dev-util/nvidia-cuda-sdk) gmsh cgns Enables cgns output support med Enables med support metis Enables metis support netgen Enable 3D Frontal triangulation using netgen lib opencascade Enable OpenCASCADE support petsc Enable sci-mathematics/petsc support gsl cblas-external Link gsl with external cblas provided by (virtual/cblas) instead of shipped internal version deprecated Enable deprecated functions hdf5 hl Enable high level API (https://support.hdfgroup.org/HDF5/doc/HL/index.html) unsupported Enable unsupported combinations of configuration options hypre fei Build the internal Finite Element Interface routines int64 Build the 64 bits integer library indilib websocket Enable support for WebSocket protocol ipopt hsl hsl mumps Enable sci-libs/mumps support lapack deprecated Also build deprecated functions eselect-ldso Enable runtime library switching by eselect and ld.so. lapacke Build LAPACKE lapack-reference deprecated Build deprecated routines lemon coin Enable the sci-libs/coinor-clp and sci-libs/coinor-cbc graph algorithms glpk Enable GNU Linear Programming Kit sci-mathematics/glpk support libccd double Use double precision floats double-precision More precise calculations at the expense of speed shared Build shared library libgeodecomp cuda Enables plugins for NVIDIA GPUs hpx Enables HPX backend opencl Enables OpenCL backend opencv Enables OpenCV related code silo Enables SILO related code libghemical mopac7 Use sci-chemistry/mopac7 for semi-empirical calculations mpqc Use sci-chemistry/mpqc for quantum-mechanical calculations liborigin tools Install opj2dat command line util libsc romio Build with support for the ROMIO MPI-IO component libsigrok ftdi Enable drivers that need libftdi parport Enable drivers that are parallel (IEEE1284) based serial Enable drivers that are serial (RS232) based libsvm tools Install python based tool scripts for data selection and visualization with sci-visualization/gnuplot linbox opencl Enable the use of OpenCL in LinBox linux-gpib firmware Install firmware lis quad Enable quadruple precision operations saamg Build the Smoothed Aggregation Algebraic MultiGrid preconditioner mathgl hdf Add support for the Hierarchical Data Format v.4 sci-libs/hdf octave Add bindings for sci-mathematics/octave matio sparse Extend formats for sparse matrix (not matlab) med hdf5-16-api Use -DH5_USE_16_API to build the package against old 1.6 API of HDF5 mkl fortran95 Installs the BLAS/LAPACK FORTRAN95 static libraries int64 Installs the 64 bits integer libraries mkl-rt eselect-ldso Enable runtime library switching by eselect and ld.so. mpir cpudetection Enables runtime cpudetection (useful for bindist, compatability on other CPUs) mumps metis Enable matrix ordering with METIS (sci-libs/metis, sci-libs/parmetis) scotch Enable matrix ordering with sci-libs/scotch netcdf dap Support for remote data access with the built-in OPeNDAP client hdf Add support for the Hierarchical Data Format v.4 sci-libs/hdf tools Build the utilities nccopy, ncgen and ncdump nlopt octave Add plugin for sci-mathematics/octave o2scl armadillo Build matrix manipulation with sci-libs/armadillo eigen Build matrix manipulation with dev-cpp/eigen oce freeimage Enable support for image i/o via media-libs/freeimage gl2ps Use gl2ps PostScript printing library tbb Enable parallel meshing vtk Enable Virtualisation Toolkit octomap dynamicEDT3D Build and install dynamicEDT3D library: A library for incrementally updatable Euclidean distance transforms in 3D. openblas dynamic Build dynamic architecture detection at run time (for multi targets) eselect-ldso Enable BLAS/LAPACK runtime switching index-64bit Compile a separate INTERFACE64 OpenBLAS pthread Build with pthread threading model opencascade freeimage Enable support for image i/o via media-libs/freeimage gles2 Use OpenGL ES 2.0 inspector Build the OCCT inspector tool for low-level data inspection optimize Don't clear allocated memory. Use optimized memory manager unless tbb USE flag is set. tbb Enable multithreading with the Intel Threads Building Block dev-cpp/tbb vtk Enable Visualization Toolkit orocos_kdl models Build models for some well known robots. p4est romio Build with support for the ROMIO MPI-IO component vtk-binary Enable binary vtk output. If disabled vtk files will be written in ASCII text format. parmetis double-precision Floating-point operation done as double precision int64 Build the 64 bits integer library (needed for > 2^31 vertices) pastix int64 Build the 64 bits integer library starpu Build and link with dev-libs/starpu pcl cuda Adds support for NVIDIA CUDA. openni Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI. openni2 Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2 (should be preferred over openni). pcap Adds pcap file capabilities in some drivers. qhull Adds convex-hull operation support via media-libs/qhull. tutorials Builds and installs tutorials. vtk Adds support for VTK-Visualizations. plplot dynamic Build with dynamic drivers octave Add bindings for sci-mathematics/octave qhull Add bindings for media-libs/qhull shapefile Enable support for ESRI shapefiles proj europe Install the PROJ collection of European grids and init-files rtabmap openni2 Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2. scikits_image freeimage Enable support for image i/o via media-libs/freeimage pyamg Enable support for algebraic solvers via dev-python/pyamg scotch int64 Build the 64 bits integer library (needed for > 2^31 vertices) tools Provides the graph, mesh, architecture, mapping/ordering, output handling programs (see Scotch User's Guide). shogun R Enable support for dev-lang/R octave Enable support for sci-mathematics/octave opencl Enable support for building against OpenCL silo silex Build silex data browser spqr partition Use the partition module of sci-libs/cholmod for partitioning tbb Enable multithreading with the Intel Threads Building Block dev-cpp/tbb spr root Add sci-physics/root graphics and i/o support suitesparse cuda Enable nvidia cuda toolkit for speeding up computations partition Enable graph partitioning and graph-partition-based orderings through sci-libs/metis or sci-libs/parmetis tbb Enable multithreading with the Intel Threads Building Block dev-cpp/tbb sundials hypre Build with sci-libs/hypre conditioners sparse Enable support for sci-libs/klu sparse solver superlumt Build with sci-libs/superlu_mt superlu_mt int64 Build the 64 bits integer library symengine arb Add support for arb (sci-mathematics/arb) benchmarks Build benchmarks boost Add support for boost integers(dev-libs/boost) ecm Add support for ECM integer factorization library (sci-mathematics/gmp-ecm) flint Add support for (sci-mathematics/flint) llvm Build with LLVM mpc Add support for multiprecision complex arithmetic(dev-libs/mpc) mpfr Add support for multiprecision floating point rouding(dev-libs/mpfr) taucs cilk Enable multithreading using dev-lang/cilk tensorflow cuda Enable support for nVidia CUDA xla XLA (Accelerated Linear Algebra) Optimizing Compiler for TensorFlow trilinos adolc Add support for adolc (sci-libs/adolc) arprec Add support for arprec (sci-libs/arprec) boost Add support for boost (dev-libs/boost) clp Add support for clp (sci-libs/coinor-clp) cuda Add support for cuda (dev-util/nvidia-cuda-toolkit) eigen Add support for eigen (dev-cpp/eigen) glpk Add support for glpk (sci-mathematics/glpk) gtest Add support for gtest (dev-cpp/gtest) hdf5 Add support for hdf5 (sci-libs/hdf5) hwloc Add support for hwloc (sys-apps/hwloc) hypre Add support for hypre (sci-libs/hypre) matio Add support for matio (sci-libs/matio) metis Add support for metis (sci-libs/metis or sci-libs/parmetis) mkl Add support for mkl (sci-libs/mkl) mumps Add support for mumps (sci-libs/mumps) netcdf Add support for netcdf (sci-libs/netcdf) petsc Add support for petsc (sci-mathematics/petsc) qd Add support for qd (sci-libs/qd) scalapack Add support for scalapack (sci-libs/scalapack) scotch Add support for scotch (sci-libs/scotch) sparse Add support for sparse matrix solvers (sci-libs/umfpack) superlu Add support for superlu (sci-libs/superlu) taucs Add support for taucs (sci-libs/taucs) tbb Add support for threading building blocks library (dev-cpp/tbb) tvmet Add support for tvmet (dev-libs/tvmet) yaml Add support for yaml (dev-cpp/yaml-cpp) umfpack cholmod Use sci-libs/cholmod for matrix ordering vtk R Enable support for dev-lang/R all-modules Build all modules boost Add support for boost gdal Support for gdal formated data imaging Building Imaging modules json Support for json formatted data offscreen Offscreen rendering through OSMesa rendering Building Redering modules tbb Use dev-cpp/tbb to handle smp support views Building Views modules web Install web component xdmf2 Support for xdmf2 formatted data xkaapi blas Kaapi BLAS tasks for PLASMA gpu Build library for gpu threading sci-mathematics agda cpphs Use cpphs instead of cpp. stdlib Install the standard library. uhc Add support for the uhc backend. agda-stdlib ffi Install agda-lib-ffi for compilation using the MAlonzo backend bertini optimization Accept upstream's choices for -O option. cgal mpfi Enable support for multiple recision interval arithmetic via sci-libs/mpfi ntl Enable support for dev-libs/ntl coq camlp5 Build using camlp5. This is required for some plugins like Ssreflect. cvc4 cln Use sci-libs/cln proofs Support for proof generation replay Turn on the replay feature statistics Include statistics eclib boost Add parallel capabilities using dev-libs/boost. flint Enable the use of sci-mathematics/flint for certain operations. minimal Build only the "mwrank" program. flint gc Enable garbage collection support via dev-libs/boehm-gc ntl Build NTL interface form devref Build and install developers reference doxygen Build and install API documentation fricas clisp Add support for GNU CLISP (dev-lisp/clisp) clozurecl Add support for Clozure Common Lisp (dev-lisp/clozurecl) cmucl Add support for CMU Common Lisp (dev-lisp/cmucl) ecls Add support for Embeddable Common Lisp (dev-lisp/ecls) gcl Add support for GNU Common Lisp (dev-lisp/gcl) sbcl Add support for Steel Bank Common Lisp (dev-lisp/sbcl) geomview motionaveraging Enable experimental motion averaging technique gmp-ecm custom-tune Improve performance of some operations by selecting machine-specific defaults gretl R Enable support for dev-lang/R gsl-shell fox Build a x11-libs/fox GUI maxima clisp Compile maxima with GNU CLISP (dev-lisp/clisp) clozurecl Compile maxima with Clozure Common Lisp (dev-lisp/clozurecl) cmucl Compile maxima with CMU Common Lisp (dev-lisp/cmucl) ecls Compile maxima with Embeddable Common Lisp (dev-lisp/ecls) gcl Compile maxima with GNU Common Lisp (dev-lisp/gcl) sbcl Compile maxima with Steel Bank Common Lisp (dev-lisp/sbcl) minisat extended-solver Build extended version of SAT solver with additional features. msieve ecm Enable support for the GMP-ECM library normaliz extras Install Macaulay2 and sci-mathematics/singularpackages as shipped by upstream octave glpk Add support for sci-mathematics/glpk for linear programming qhull Add support for media-libs/qhull, to allow `delaunay', `convhull', and related functions qrupdate Add support for sci-libs/qrupdatefor QR and Cholesky update functions sparse Add enhanced support for sparse matrix algebra with SuiteSparse pari data Add additional data (elldata, galdata, seadata, nftables) petsc afterimage Use Afterstep image library (media-libs/libafterimage) boost Use boost (dev-libs/boost) complex-scalars Make scalars complex hypre Use HYPRE (sci-mathematics/hypre) and for preconditioning metis Add support for metis (sci-libs/parmetis) mumps Add support for mumps (sci-libs/mumps) scotch Add support for scotch (sci-libs/scotch) sparse Use suitesparse (sci-libs/suitesparse) including cholmod (sci-libs/cholmod) for sparse factorization superlu Use superlu (sci-libs/superlu) for preconditioning polymake bliss Enable sci-libs/bliss interface for graph and face lattice isomorphism computations. cdd Enable sci-libs/cddlib interface for convex hull computations (Should be kept enabled). group Build extension for dealing with permutation groups and symmetric objects. libnormaliz Build the bundled extension for lattice related computations. libpolymake Build the polymake library to build applications using the C++ interface. lrs Enable sci-libs/lrslib interface for convex hull computations. ppl Enable dev-libs/ppl interface for convex hull computations. singular Enable the interface to sci-mathematics/singular for ideal related computations. rstudio server Build and install the RStudio server singular boost Compile against external boost headers (dev-libs/boost) slepc complex-scalars Make scalars complex unuran prng Use sci-mathematics/prng library rngstreams Use sci-mathematics/rngstreams library why3-for-spark coq Add sci-mathematics/coq support html Build HTML documentation hypothesis-selection Enable hypothesis selection profiling Enable profiling zarith Use dev-ml/zarith zip Enable compression of session files yacas jupyter Add support for jupyter notebook yafu sieve Use msieve for the sieving steps of NFS z3 isabelle Add integration support for the Isabelle/HOL theorem prover. sci-misc boinc cuda Use nvidia cuda toolkit for speeding up computations. NOTE: works only for subset of nvidia graphic cards so make sure your card is supported before opening a bug about it. h5utils hdf Build hdf to hdf5 (and vice-versa) converter octave Build Octave plugins nco dap Support for remote data access with the NETCDF DAP client ncap2 Build next generation netcdf arithmetic processor (needs dev-java/antlr) udunits Add sci-libs/udunits files support tango dbserver Enable build of tango dbserver mariadb Use dev-db/mariadb zeromq Allow to use ZeroMQ broker via net-libs/zeromq sci-physics bullet bullet3 Build Bullet 3 double-precision Build libraries in double precision extras Build additional libraries tbb Enable multithreading with the Intel Threads Building Block dev-cpp/tbb cernlib-montecarlo herwig Build Herwig internal event generator, newer version available in sci-physics/herwig espresso cuda Enable cuda support examples Installs the examples fastjet cgal Use sci-mathematics/cgal instead of bundled algorithms plugins Build all standard and C++ plugins geant c++11 Build using the C++11 standard c++14 Build using the C++14 standard c++17 Build using the C++17 standard data Add a lot of standard physics data files for geant4 dawn Add support for media-gfx/dawn (3D postscript rendering) freetype Add support for media-libs/freetype gdml Enable geometry markup language for xml geant3 Add compatibility for geant321 to geant4 inventor Add support for Open Inventor SGI toolkit via Coin3D raytracerx Enable raytracing for physics events vrml Enable output of geant4 in vrml formats geant-vmc c++11 Build using the C++11 standard c++14 Build using the C++14 standard c++17 Build using the C++17 standard g4root Build G4Root (interface for GEANT4 simulation with a ROOT geometry) geant3 Build with Geant4 G3toG4 library mtroot Build MTRoot (provides ROOT IO manager classes with multi-threading support) rootvmc Use sci-physics/root[vmc] (deprecated) instead of sci-physics/vmc as VMC provider vgm Enable the Virtual Geometry Model (sci-physics/vgm) hepmc cm Build with cm instead of default mm for length units gev Build with GeV instead of default MeV for momentum units herwig++ c++11 Build Herwig++ using the C++11 standard. Experimental feature, not for production use. fastjet Adds support for sci-physics/fastjet lammps cuda Enable cuda non-bonded kernels kokkos Enable kokkos non-bonded kernels lammps-memalign Enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS. Aliengnment is on 16 byte boundaries. pythia fastjet Build jets using the sci-physics/fastjet package hepmc Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc lhapdf Support the use of external PDF sets via sci-physics/lhapdf root Use sci-physics/root trees and histograms (in examples only) root R Enable support for dev-lang/R asimage Enable support for media-libs/libafterimage c++11 Build using the C++11 standard c++14 Build using the C++14 standard c++17 Build using the C++17 standard cuda Enable support for nVidia CUDA cudnn Enable support for nVidia cuDNN library davix Enable support for DAVIX Data Management Client (https://cern.ch/davix) fits Enable support for images and data from FITS files with sci-libs/cfitsio fortran Compile included Fortran programs gdml Enable GDML writer and reader http Enable http server support including but not limited to fastcgi support libcxx Build ROOT against sys-libs/libcxx memstat Build memory statistics library, helps to detect memory leaks minuit Build ROOT's internal versions of minuit (fortran) and minuit2 (C++) nosplash Disable ROOT's splash screen by default pythia6 Build the interface for sci-physics/pythia version 6.x pythia8 Build the interface for sci-physics/pythia version 8.x roofit Build RooFit function fitting package root7 Build experimental features to be released with ROOT 7 shadow Enable shadow authentication in rootd and proofd tbb Enable implicit multi-threading (IMT) with dev-cpp/tbb tmva Built TMVA (ROOT's multi-variate analysis toolkit for machine learning) unuran Enable support for sci-mathematics/unuran vc Enable support for dev-libs/vc with VecCore vmc Built the Virtual Monte Carlo library xrootd Build the interface for net-libs/xrootd thepeg c++11 Build ThePEG using the C++11 standard. Experimental feature, not for production use. fastjet Adds support for sci-physics/fastjet hepmc Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc lhapdf Adds support for sci-physics/lhapdf vgm c++11 Build using the C++11 standard c++14 Build using the C++14 standard c++17 Build using the C++17 standard geant4 Enable interaction with Geant4(sci-physics/geant:4) root Enable interaction with ROOT (sci-physics/root) vmc c++11 Build using the C++11 standard c++14 Build using the C++14 standard c++17 Build using the C++17 standard yoda root Adds support for sci-physics/root sci-visualization fityk nlopt Enable optimization with sci-libs/nlopt gnuplot bitmap Enable dot-matrix printers and pbm terminal compat Enable backwards compatibility with version 4 syntax gd Add support for media-libs/gd. Needed for GIF, JPEG, and PNG image output. libcerf Enable special functions from sci-libs/libcerf regis Enable ReGIS terminal gwyddion fits Enable FITS image import via sci-libs/cfitsio sourceview Enable support for x11-libs/gtksourceview labplot cantor Enable support for different open-source computer algebra systems via kde-apps/cantor fits Enable support for NASA's sci-libs/cfitsio library libcerf Enable special functions from sci-libs/libcerf root Enable support for CERN's ROOT file type opendx cdf Add support for sci-libs/cdf data exchange format hdf Add support for the Hierarchical Data Format (sci-libs/hdf) paraview boost Enable the usage of dev-libs/boost cg Add support for nvidia's cg shaders coprocessing Enable the coprocessing infrastructure which is mainly useful in the context of clusters development Install development files including headers nvcontrol Add NVCONTROL support for OpenGL options offscreen Offscreen rendering through OSMesa plugins Build and install additional plugins webengine Add support for dev-qt/qtwebengine sec-policy selinux-base open_perms Enable the open permissions for file object classes (SELinux policy capability). peer_perms Enable the labeled networking peer permissions (SELinux policy capability). ubac Enable User Based Access Control (UBAC) in the SELinux policy unconfined Enable support for the unconfined SELinux module unknown-perms Default allow unknown classes in kernels newer than the policy (SELinux policy capability). selinux-base-policy unconfined Enable support for the unconfined SELinux policy module sys-apps accountsservice elogind Use sys-auth/elogind for session tracking systemd Use sys-apps/systemd for session tracking baselayout-prefix split-usr Enable this if /bin and /usr/bin are separate directories busybox make-symlinks Create all the appropriate symlinks in /bin and /sbin. math Enable math support in gawk (requires libm) mdev Create the appropriate symlink in /sbin and install mdev.conf and support files sep-usr Support a separate /usr without needing an initramfs by booting with init=/ginit static Make the system rescue shell (/bin/bb) static so you can recover even when glibc is broken systemd Support systemd coreutils caps Add Linux capabilities support in output of file utilities (ls, dir, ...) via sys-libs/libcap hostname Build the hostname program kill Build the kill program multicall Build all tools into a single `coreutils` program akin to busybox to save space split-usr Enable this if /bin and /usr/bin are separate directories dbus elogind Use sys-auth/elogind for session tracking. systemd Build with sys-apps/systemd at_console support user-session Enable user-session semantics for session bus under systemd dbus-broker launcher dbus-daemon compatibility launcher debianutils installkernel Install /sbin/installkernel script (for Linux). installkernel is required whenever a kernel will be installed via make install dtc yaml support .yaml-encoded device trees duc X Use X11 for the GUI instead of OpenGL. This is the recommended option cairo Build support for exporting to PNG and PDF with x11-libs/cairo leveldb Use dev-libs/leveldb as the backend ncurses Build support for the ncurses client sqlite Use dev-db/sqlite:3 as the backend tokyocabinet Use dev-db/tokyocabinet as the backend earlyoom docs Generate man page elfix ptpax Enable PT_PAX_FLAGS support. xtpax Enable XATTR_PAX_FLAGS support. etckeeper cron Install cron script ethtool netlink Enable netlink interface via net-libs/libmnl firejail apparmor Enable support for custom AppArmor profiles chroot Enable chrooting to custom directory contrib Install contrib scripts file-transfer Enable file transfers between sandboxes and the host system globalcfg Enable global config file network Enable networking features overlayfs Enable overlayfs private-home Enable private home feature seccomp Enable system call filtering userns Enable attaching a new user namespace to a sandbox (--noroot option) whitelist Enable whitelist x11 Enable X11 sandboxing firejail-lts apparmor Enable support for custom AppArmor profiles globalcfg Enable global config file network Enable networking features seccomp Enable system call filtering userns Enable attaching a new user namespace to a sandbox (--noroot option) whitelist Enable file and directory whitelisting flashrom atahpt Highpoint (HPT) ATA/RAID controller support atapromise Support for Promise PDC2026x (FastTrak/Ultra) atavia Support for VIA VT6421A SATA controllers buspirate-spi Enable Bus Pirate SPI programmer ch341a-spi Enable WCH CH341A SPI programmer dediprog Dediprog SF100 support developerbox-spi Enable Devloperbox SPI recovery support digilent-spi Enable support for Digilent iCEblink40 development board drkaiser Enable Dr. Kaiser programmer dummy Enable dummy tracing ene-lpc Enable ENE LPC interface keyboard controller ft2232-spi Enable ftdi programmer, flashing through FTDI/SPI USB interface gfxnvidia Enable NVIDIA programmer internal Enable internal/onboard support internal-dmi Enable internal DMI decoding rather than use sys-apps/dmidecode it8212 Support for ITE IT8212F ATA/RAID controllers jlink-spi Support for SEGGER J-Link and compatible devices linux-mtd Enable support for Linux mtd SPI flash devices linux-spi Enable support for Linux userspace spidev interface lspcon-i2c-spi Enable support for Parade lspcon USB-C to HDMI protocol translator mec1308 Enable support for Microchip MEC1308 embedded controller mstarddc-spi Support for SPI flash ROMs accessible through DDC in MSTAR-equipped displays nic3com Enable 3Com NIC programmer nicintel Support for Intel NICs nicintel-eeprom Support for EEPROMs on Intel Gigabit network cards nicintel-spi Support for SPI on Intel NICs nicnatsemi Support for National Semiconductor NICs nicrealtek Support for Realtek NICs ogp-spi Enable support for OGP (Open Graphics Project) SPI flashing pickit2-spi SUpport for SPI flash ROMs accessible via Microchip PICkit2 pony-spi Enable support for SI-Prog like hardware by Lancos raiden Enable ChromiumOS Servo DUT debug board rayer-spi RayeR SPIPGM hardware support realtek-mst-i2c-spi Enable support for Realtek MultiStream Transport (MST) satamv Enable programmer for Marvell SATA controllers satasii Enable programmer for SiI SATA controllers serprog Enable Serial Flasher programmer stlinkv3-spi Enable SPI programmer using STLINK-V3 tools Install ich_descriptor_tool, a tool for reading descriptor-mode SPI-flash images for Intel chipsets usbblaster-spi Enable support for Altera USB-Blaster dongles wiki Enable wiki informations, like supported devices etc. fwupd agent Enable update notification agent amt Build and install Intel AMT plugin dell Enable Dell-specific support. gpg Enable GPG support. man Build and install man pages nvme Build and install NVMe plugin pkcs7 Enable PKCS7 verification support via net-libs/gnutls redfish Install redfish plugin synaptics Install synaptics plugin thunderbolt Install Thunderbolt plugin tpm Install Trusted Platform Module plugin uefi Enable UEFI support gawk mpfr use mpfr for high precision arithmetic (-M / --bignum) gnome-disk-utility fat Include FAT16/FAT32 support (sys-fs/dosfstools) hwdata-gentoo binary-drivers Adds support for ATI/NVIDIA binary drivers hwids net Install the oui.txt and iab.txt databases pci Install the pci.ids database udev Install hwdb.d rules for udev usb Install the usb.ids database hwloc X use the X Window System cairo Enable the Cairo back-end of hwloc's lstopo command cpuid Enable the cpuid-based architecture specific support (x86 component) cuda Enable CUDA device discovery using libcudart gl Enable GL display device discovery (NVCtrl) libudev Enable the Linux libudev netloc Enable Netloc numa Add support for numa memory allocation nvml Enable the NVML device discovery pci Enable PCI device discovery using libpci plugins Build hwloc components as plugins so that the hwloc core library does not directly depend on their dependencies (for instance the libpci library) xml use libxml2 for XML support, instead of a custom minimalistic support ibm-powerpc-utils rtas Add support for the Run Time Abstraction Services (RTAS) iotools make-symlinks Generate sub-command symlinks to iotools -- note that a lot are simple like "xor" ipmicfg uefi Install compatible UEFI file for boot. ipmitool openbmc Enable OpenBMC D-Bus interface openipmi Use the system OpenIPMI implementation. iproute2 berkdb build programs that use berkdb (just arpd) elf support loading eBPF programs from ELFs (e.g. LLVM's eBPF backend) iptables include support for iptables filtering minimal only install ip and tc programs, without eBPF support irqbalance numa Support balancing IRQs across NUMA nodes tui Enable build of irqbalance terminal user interface kexec-tools booke Include support for Book-E memory management lzma Enables support for LZMA compressed kernel images xen Enable extended xen support kmod lzma Enable support for XZ compressed modules pkcs7 Enable PKCS#7 signature parsing for modinfo. tools Install module loading/unloading tools. zlib Enable support for gzipped modules kmscon drm Enable Linux DRM for backend fbdev Enable Linux FBDev for backend gles2 Enable GLES2 for backend optimizations Enable optimizations pango Enable pango font rendering pixman Enable pixman font rendering systemd Enable multiseat support via systemd linux-misc-apps usbip Include USB/IP binaries to replace net-misc/usbip lm-sensors contrib Installs user contributed configuration files so you don't need to find settings on your own for your system if somebody else has already created such a configuration for sensors/mainboards you are using. sensord Enable sensord - a daemon that can be used to periodically log sensor readings from hardware health-monitoring chips man-db manpager Enable manpager wrapper for colorizing output memtest86 serial Compile with serial console support memtest86+ boot Also install to /boot instead of just /usr/share/memtest86+/ floppy Install a script to create floppy disks containing memtest86+ binaries. iso Compile an ISO image serial Compile with serial console support moreutils perl Install scripts written in Perl net-tools arp build the arp and rarp tools (for manipulating the ARP cache) hostname build the hostname and dnsdomainname tools plipconfig build the plipconfig tool (for working with old PLIP hardware) slattach build the slattach tool (for working with old serial ports) nvme-cli uuid UUID support openrc bash enable the use of bash in service scripts (experimental) netifrc enable Gentoo's network stack (net.* scripts) newnet enable the new network stack (experimental) sysv-utils Install sysvinit compatibility scripts for halt, init, poweroff, reboot and shutdown pciutils dns Enable support for querying the central database of PCI IDs using DNS kmod Enable sys-apps/kmod support for the -k switch in lspci command zlib Support compressed pci.ids database pcmciautils staticsocket Add support for static sockets pcsc-lite embedded limit RAM and CPU ressources by disabling features libusb Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev. policykit Uses sys-auth/polkit to restrict access to smartcard readers or smartcars to given users. udev Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness. pcsc-tools network-cron Monthly cronjob the update-smartcard_list script policycoreutils audit Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid()) portage apidoc Build html API documentation with sphinx-apidoc. gentoo-dev Enable features required for Gentoo ebuild development. ipc Use inter-process communication between portage and running ebuilds. native-extensions Compiles native "C" extensions (speedups, instead of using python backup code). Currently includes libc-locales. This should only be temporarily disabled for some bootstrapping operations. Cross-compilation is not supported. rsync-verify Enable full-tree cryptographic verification of Gentoo repository rsync checkouts using app-portage/gemato. xattr Preserve extended attributes (filesystem-stored metadata) when installing files. Usually only required for hardened systems. proot care Build dynamic CARE binary (more info - https://proot-me.github.io) qingy opensslcrypt Encrypt communications between qingy and its GUI using dev-libs/openssl razercfg gui Installs GUI configuration utility and status bar applet. Requires dev-python/PyQt5 pm-utils Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils rng-tools jitterentropy Enable Jitter RNG entropy support nistbeacon Enable NIST beacon entropy support pkcs11 Enable PKCS11 entropy support rtl-entropy bladerf Build with Nuand BladeRF support s390-tools cryptsetup build the zkey-cryptsetup utility (requires USE=openssl) fuse build cmsfs-fuse to read files stored on a z/VM CMS disk ncurses build hyptop monitoring program openssl build the zkey utility pfm build the cpacfstats tool zlib build the zgetdump and dump2tar utilities s6 execline enable support for dev-lang/execline s6-linux-init sysv-utils Install sysvinit compatibility symlinks for telinit, halt, poweroff, reboot, and shutdown shadow bcrypt build the bcrypt password encryption algorithm su build the su program smartmontools caps Build against sys-libs/libcap-ng to allow smartd to drop its privileges. daemon Install the monitoring daemon (smartd) and associated scripts. update_drivedb Install a script to update the drivedb file. smc-sum module Install Supermicro's kernel module. superdiag iso Install an iso image, which can be used with sys-apps/smc-sum. usb Install all files, which are needed for an installation on an usb thumb drive. superiotool pci Support for PCI-attached "Super I/Os" (e.g. in VIA VT82686A/B). systemd apparmor Enable AppArmor support audit Enable support for sys-process/audit cgroup-hybrid Default to hybrid (legacy) cgroup hierarchy instead of unified (modern). cryptsetup Enable cryptsetup tools (includes unit generator for crypttab) curl Enable support for uploading journals dns-over-tls Enable DNS-over-TLS support elfutils Enable coredump stacktraces in the journal gcrypt Enable sealing of journal files using gcrypt gnuefi Enable EFI boot manager and stub loader (built using sys-boot/gnu-efi) homed Enable portable home directories http Enable embedded HTTP server in journald hwdb Enable support for the hardware database importd Enable import daemon kmod Enable kernel module loading via sys-apps/kmod lz4 Enable lz4 compression for the journal nat Enable support for network address translation in networkd pkcs11 Enable PKCS#11 support for cryptsetup and homed pwquality Enable password quality checking in homed qrcode Enable qrcode output support in journal repart Enable support for growing/adding partitions resolvconf Install resolvconf symlink for systemd-resolve sysv-utils Install sysvinit compatibility symlinks and manpages for init, telinit, halt, poweroff, reboot, runlevel, and shutdown vanilla Disable Gentoo-specific behavior and compatibility quirks xkb Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap tcp-wrappers netgroups Support matching NIS (host) netgroup names via the @netgroup syntax (if you don't know what this means, you most likely do not need it) texinfo standalone Build standalone version that survives all Portage bugs timer_entropyd debug Enable printf debugging and logging to the syslog at DEBUG level ucspi-ssl bindist Disable EC/RC5 algorithms in OpenSSL for patent reasons. usb_modeswitch jimtcl Use dev-lang/jimtcl instead of dev-lang/tcl for smaller memory footprint usermode-utilities fuse Build tools (currently umlmount) needing fuse util-linux audit Use sys-process/audit to emit audit messages about system changes caps build setpriv helper (run programs with diff capabilities) cramfs build mkfs/fsck helpers for cramfs filesystems cryptsetup Use sys-fs/cryptsetup to have built-in dm-verity in libmount fdformat build fdformat (floppy disk format) hardlink build hardlink program kill build the kill program logger build the logger program pam build runuser helper su build the su program suid install mount/umount as setuid so non-root users may mount/umount devices, and wall/write as setgid so non-root users can notify other users tty-helpers install the mesg/wall/write tools for talking to local users watchdog nfs enable support for checking nfs mounts xdg-desktop-portal screencast Enable screencast portal using media-video/pipewire xinetd rpc support RPC services sys-auth fingerprint-gui upekbsapi Add UPEK BSAPI drivers for identify functions on some readers google-authenticator-libpam-hardened qrcode Display QRcode after setup to accomodate automatic setup of OTP client apps. keystone memcached Installs dependencies needed for using memcached as a backend mongo Installs dependencies needed for using mongo as a backend munge gcrypt Use libgcrypt instead of openssl nss-pam-ldapd pynslcd Install the python implementation along with the standard implementation utils Install the command-line utilities oath-toolkit pam Build PAM module for pluggable login authentication for OATH pskc Build tools & library for the Portable Symmetric Key Container (PSKC) format per RFC6030 pam_mktemp prevent-removal If supported, set EXT2_APPEND_FL on /tmp/.private to prevent temporary directories from being removed pam_mysql openssl Use OpenSSL for md5 and sha1 support pam_u2f debug Enable debug messages using the pam logging macros. pambase debug Enable debug information logging on syslog(3) for all the modules supporting this in the system authentication and system login stacks. elogind Use pam_elogind module to register user sessions with elogind. minimal Disables the standard PAM modules that provide extra information to users on login; this includes pam_lastlog, pam_motd, pam_mail and other similar modules. This might not be a good idea on a multi-user system but could reduce slightly the overhead on single-user non-networked systems. mktemp Enable pam_mktemp module on system auth stack for session handling. This module creates a private temporary directory for the user, and sets TMP and TMPDIR accordingly. nullok Enable the nullok option with the pam_unix module. This allows people to login with blank passwords. pam_krb5 Enable pam_krb5 module on system auth stack, as an alternative to pam_unix. If Kerberos authentication succeed, only pam_unix will be ignore, and all the other modules will proceed as usual, including Gnome Keyring and other session modules. It requires sys-libs/pam as PAM implementation. pam_ssh Enable pam_ssh module on system auth stack for authentication and session handling. This module will accept as password the passphrase of a private SSH key (one of ~/.ssh/id_rsa, ~/.ssh/id_dsa or ~/.ssh/identity), and will spawn an ssh-agent instance to cache the open key. passwdqc Enable pam_passwdqc module on system auth stack for password quality validation. This module produces warnings, rejecting or providing example passwords when changing your system password. It is used by default by OpenWall GNU/*/Linux and by FreeBSD. pwhistory Enable pam_pwhistory module on system auth stack to save the last passwords for each user in order to force password change history and keep the user from alternating between the same password too frequently. pwquality Enable pam_pwquality module on system auth stack for passwd quality validation. It is used be dafault by Fedora GNU/*/Linux. securetty Enable pam_securetty module in the login stack. Not generally relevant anymore as the login stack only refers to local logins and local terminals imply secure access in the first place. sha512 Switch Linux-PAM's pam_unix module to use sha512 for passwords hashes rather than MD5. This option requires sys-libs/pam version 1.0.1 built against sys-libs/glibc version 2.7, if it's built against an earlier version, it will silently be ignored, and MD5 hashes will be used. All the passwords changed after this USE flag is enabled will be saved to the shadow file hashed using SHA512 function. The password previously saved will be left untouched. Please note that while SHA512-hashed passwords will still be recognised if the USE flag is removed, the shadow file will not be compatible with systems using an earlier glibc version. systemd Use pam_systemd module to register user sessions in the systemd control group hierarchy. polkit elogind Use sys-auth/elogind for session tracking systemd Use sys-apps/systemd for session tracking ssh-ldap-pubkey schema Install a copy of the LPK schema, only needed on LDAP servers. sssd acl Build and use the cifsidmap plugin autofs Build helper to let net-fs/autofs use sssd provided information locator Install sssd's Kerberos plugin man Build man pages with dev-libs/libxslt manpages Build man pages with dev-libs/libxslt netlink Add support for netlink protocol via dev-libs/libnl nfsv4 Add support for the nfsv4 idmapd plugin provided by net-libs/libnfsidmap pac Add Privileged Attribute Certificate Support for Kerberos ssh Build helper to let net-misc/openssh use sssd provided information sudo Build helper to let app-admin/sudo use sssd provided information valgrind Depend on dev-util/valgrind for test suite sys-block f3 extra Build the additional f3probe, f3brew and f3fix utility (requires sys-block/parted and virtual/udev) fio aio Enable AIO ioengine curl Enable HTTP engine for S3 and WebDav support support via net-misc/curl glusterfs Enable GlusterFS gfapi support via sys-cluster/glusterfs gnuplot Install tools for generating gnuplots io-uring Enable efficient I/O via sys-libs/liburing. numa Enable numa support rbd Enable Rados block device support via sys-cluster/ceph rdma Enable infiniband support via sys-fabric/librdmacm tcmalloc Link against dev-util/google-perftools by default which will speed up USE=rbd up to 20% zbc Enable ZBC & ZAC disks via sys-block/libzbc. gparted btrfs Include Btrfs support (sys-fs/btrfs-progs) cryptsetup Include LUKS volume support (sys-fs/cryptsetup) dmraid Support for dmraid devices, also known as ATA-RAID, or Fake RAID. f2fs Include F2FS support (sys-fs/f2fs-tools) fat Include FAT16/FAT32 support (sys-fs/dosfstools) hfs Include HFS support (sys-fs/hfsutils) jfs Include JFS support (sys-fs/jfsutils) mdadm Support for Linux software RAID. ntfs Include NTFS support (sys-fs/ntfs3g) reiser4 Include ReiserFS4 support (sys-fs/reiser4progs) reiserfs Include ReiserFS support (sys-fs/reiserfsprogs) udf Include UDF support (sys-fs/udftools) wayland Enable interim workaround to allow running GParted under Wayland by granting permission to the X11 display using x11-apps/xhost. xfs Include XFS support (sys-fs/xfsprogs, sys-fs/xfsdump) nbd netlink Add support for netlink protocol via dev-libs/libnl open-iscsi rdma Support iSCSI over RDMA tcp Support iSCSI over TCP parted debug Enable debugging as encouraged by upstream: [The default configuration] includes --enable-debug (by default), which contains many assertions. Obviously, these "waste" space, but in the past, they have caught potentially dangerous bugs before they would have done damage, so we think it's worth it. Also, it means we get more bug reports ;) device-mapper Enable device-mapper support from sys-fs/lvm2 in parted partimage nologin Do not include login support when connecting partimaged perccli efi Install EFI variant as well sas2ircu efi Install EFI variant as well sas3flash efi Install EFI variant as well sas3ircu efi Install EFI variant as well tgt fcoe Add support for FCoE protocol fcp Add support for new FC protocol ibmvio Add support for IBM Virtual I/O rbd Add support for ceph block devices sys-boot grub device-mapper Enable support for device-mapper from sys-fs/lvm2 efiemu Build and install the efiemu runtimes fonts Build and install fonts for the gfxterm module libzfs Enable support for sys-fs/zfs mount Build and install the grub-mount utility themes Build and install GRUB themes (starfield) truetype Build and install grub-mkfont conversion utility lilo device-mapper Enable support for device-mapper from sys-fs/lvm2 minimal Do not install the dolilo helper script pxeserial Avoid character echo on PXE serial console netboot bootrom Install the bootrom binary for creation of rom files, which can be used for booting via floppy or rom. plymouth gdm Enables smooth transition to GDM libkms Provides abstraction to the DRM drivers (intel, nouveau and vmwgfx at this moment) pango Adds support for printing text on splash screen and text prompts, e.g. for password split-usr Enable this if /bin and /usr/bin are separate directories refind btrfs Builds the EFI binary btrfs filesystem driver ext2 Builds the EFI binary ext2 filesystem driver ext4 Builds the EFI binary ext4 filesystem driver gnuefi Compile using GNU-EFI instead of Tianocore hfs Builds the EFI binary hfs filesystem driver iso9660 Builds the EFI binary iso9660 filesystem driver ntfs Builds the EFI binary ntfs filesystem driver reiserfs Builds the EFI binary reiserfs filesystem driver silo tilo-only Install only the tilo netboot tool vboot-utils libzip Use dev-libs/libzip. woeusb minimal Install only woeusb tool sys-cluster ceph babeltrace Add support for LTTng babeltrace cephfs Build support for cephfs, a POSIX compatible filesystem built on top of ceph diskprediction Enable local diskprediction module to predict disk failures dpdk Enable DPDK messaging fuse Build fuse client grafana Install grafana dashboards kafka Rados Gateway's pubsub support for Kafka push endpoint lttng Add support for LTTng mgr Build the ceph-mgr daemon nss Use dev-libs/nss for cryptography numa Use sys-process/numactl for numa support in rocksdb openssl Use dev-libs/openssl pmdk Enable PMDK libraries rabbitmq Use rabbitmq-c to build rgw amqp push endpoint radosgw Add radosgw support rbd-rwl Enable librbd persistent write back cache spdk Enable SPDK user-mode storage driver toolkit system-boost Use system dev-libs/boost instead of the bundled one uring Build with support for sys-libs/liburing xfs Add xfs support zfs Add zfs support charliecloud ch-grow Build the internal builder ch-grow pv Use sys-apps/pv to enable progress bar functionality squashfs Use sys-fs/squashfs-tools for creating SquashFS images squashfuse Use sys-fs/squashfuse for the SquashFS workflow charm ampi Build implementation of MPI on top of Charm++ charmdebug Enable the charm debugger charmproduction Optimize performance of Charm++ runtime charmtracing Enable tracing support in Charm++ cmkopt Enable CMK optimisation mlogft Compile with Charm++ message logging fault tolerance support numa Support memory affinity with NUMA syncft Compile with Charm++ fault tolerance support tcp Use TCP (instead of UPD) for socket communication cinder api Installs the initscripts for the cinder api service iscsi Allow using an iSCSI remote storage server as pool for disk image storage lvm Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage memcached Installs the memcached server rdma Enable rdma storage backend support scheduler Installs the initscripts for the cinder scheduler service tcp Enables tcp support for the iscsi backend tgt Enable tgt storage backend support volume Installs the initscripts for the cinder volume service cluster-glue ipmilan Install the ipmilan plugin (requires sys-libs/openipmi) libnet Force use of net-libs/libnet drbd-utils heartbeat Enable Heartbeat integration pacemaker Enable Pacemaker integration xen Enable Xen integration galera garbd Install Galera Arbitrator - a stateless daemon which acts as a lightweight group member glusterfs fuse Add FUSE mount helper georeplication Enable support for georeplication (requires dev-lang/python) infiniband Add support for Infiniband ibverbs transport. Libraries can be found in science overlay ipv6 Use IPv6 by default, requires libtirpc libtirpc Build against net-libs/libtirpc for RPC support rsyslog Install configuration snippet for app-admin/rsyslog heat memcached Installs the memcached server hpx papi Use dev-libs/papi for NaCl perftools Use dev-util/google-perftools for memory allocation tbb Use dev-cpp/tbb for memory allocation keepalived bfd compile with support for Bidirectional Forwarding Detection (BFD). json compile with signal to dump configuration and stats as JSON. regex compile with support for regex in health checks kronosnet lzo2 Add support for lzo2 compression nss Add support for tls via nss openssl Add support for tls via openssl kubernetes kube-apiserver Kubernetes API server kube-controller-manager Kubernetes controller manager kube-proxy Kubernetes proxy service kube-scheduler Kubernetes scheduler kubeadm CLI to bootstrap a secure Kubernetes cluster kubectl CLI to run commands against Kubernetes clusters kubelet Kubernetes node agent legion gasnet Enable GASNet lib support hwloc Enable HWLoc lib support lustre client Enable kernel client modules dlc Enable Dynamic LNET Configuration server Enable kernels server modules tests Enable installation of tests utils Enable lustre utils maui pbs Enable pbs integration slurm Enable slurm integration minikube libvirt Build plugin for kvm mpich mpi-threads Enable MPI_THREAD_MULTIPLE romio Build the ROMIO MPI-IO component mpich2 mpi-threads Enable MPI_THREAD_MULTIPLE romio Enable romio, a high-performance portable MPI-IO implementation mvapich2 large-cluster Automatically generated description for large-cluster medium-cluster Automatically generated description for medium-cluster romio Automatically generated description for romio neutron compute-only Only install things needed on compute hosts dhcp Installs the initscripts for the neutron dhcp service haproxy haproxy backend support l3 Installs the initscripts for the neutron l3 agent service linuxbridge Installs the initscripts for the neutron linuxbridge agent service metadata Installs the initscripts for the neutron metadata agent service openvswitch Installs the initscripts for the neutron openvswitch agent service server Installs the initscripts for the neutron server service nomad nvidia build with nvidia integration nova compute Installs the initscripts for the nova volume service compute-only only install stuff needed for a compute host iscsi Installs iscsi helper udev scripts memcached Installs the memcached server novncproxy Installs the initscripts for the nova novncproxy service openvswitch Installs openvswitch for the neutron openvswitch support rabbitmq Installs the rabbitmq server openmpi cma Enable the CMA (Cross Memory Attach) MCA cuda Add GPU direct support heterogeneous Enable features required for heterogeneous platform support mpi-threads Enable MPI_THREAD_MULTIPLE numa Enable numactl to allow binding processes to CPUs pbs Add support for the Portable Batch System (PBS) romio Build the ROMIO MPI-IO component vt Enable bundled VampirTrace support openstack-meta cinder Installs Openstack Cinder glance Installs Openstack Glance heat Installs Openstack Heat keystone Installs Openstack Keystone neutron Installs Openstack Neutron nova Installs Openstack Nova placement Installs Openstack Placement swift Installs Openstack Swift pacemaker smtp Enable SMTP support via net-libs/libesmtp pmix munge Enable authentication via munge pmi Build PMI1 and PMI2 interface rdma-core neigh Enable iwpmd support python Enable pyverbs support valgrind Enable valgrind notations resource-agents libnet Force use of net-libs/libnet rgmanager Install resources for rgmanager singularity network Install network plug-ins suid Install SUID helper binary slurm html Build html documentation ipmi Build support for collecting some ipmi stats json Add support for json-persing via json-c multiple-slurmd Allow multiple slurmd to run munge Enable authentication via munge netloc Add support for netloc (amd64 only) numa Add NUMA awareness ofed Add Infiniband support via ofed slurmdbd Install SQL server for slurmdbd torque Enable perl scripts that emulates pbs (qstat, qsub etc.) ucx Enable Unified Communication X library support swift account adds swift account support container adds swift container support memcached adds memcached support object adds swift object support proxy adds swift proxy support torque autorun Enable the AUTORUN_JOBS codebase cgroups Enable pbs_mom to use linux cgroups to isolate jobs cpusets Enable pbs_mom to utilize linux cpusets if available drmaa Enable the Distributed Resource Management Application API munge Enable authentication via munge nvidia Enable management of Nvidia GPUs quickcommit Enable the QUICKCOMMIT codebase server Enable compilation of pbs_server and pbs_sched ucx numa Add support for numa memory allocation vzctl ploop Add support for ploop devices via sys-cluster/ploop vzmigrate Add support for container migration sys-devel autogen libopts install the libopts tarball (a few packages want this for developing) binutils default-gold Set ld to point to ld.gold instead of ld.bfd gold Build ld.gold linker multitarget Adds support to binutils for cross compiling (does not work with gas) plugins Enable plugin support in tools binutils-apple classic Use nm, otool, etc. from this ebuild instead of llvm-based tools libcxx Add support for libcxx lto Add support for Link-Time Optimization with LLVM multitarget Compile for non-standard target architectures (ppc and ppc64) -- experimental, Gentoo only tapi Build against sys-libs/tapi binutils-config native-symlinks Install native symlinks like 'as' or 'ar' to /usr/bin. Otherwise keep only ${CTARGET}-as and friends. binutils-hppa64 default-gold Set ld to point to ld.gold instead of ld.bfd gold Build ld.gold linker multitarget Adds support to binutils for cross compiling (does not work with gas) plugins Enable plugin support in tools clang default-compiler-rt Use compiler-rt instead of libgcc as the default rtlib for clang default-libcxx Use libc++ instead of libstdc++ as the default stdlib for clang default-lld Use lld as the default linker for clang static-analyzer Install the Clang static analyzer clang-runtime compiler-rt Install sys-libs/compiler-rt for -rtlib=compiler-rt libcxx Install sys-libs/libcxx for -stdlib=libc++ openmp Install sys-libs/libomp for -fopenmp support sanitize Enable compiler-rt sanitizer (-fsanitize*) support distcc gssapi Enable support for net-libs/libgssglue gcc ada Build the ADA language (GNAT) frontend awt Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+ cilk Support the Cilk Plus language (C/C++ based languages for parallel programming) d Enable support for the D programming language fixed-point Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!) gcj Build the GCJ Java language frontend. go Build the GCC Go language frontend. graphite Add support for the framework for loop optimizations based on a polyhedral intermediate representation jit Enable libgccjit so other applications can embed gcc for Just-In-Time compilation. This will slow down the compiler a bit as it forces all of the toolchain to be shared libs. libssp Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES) lto Build using Link Time Optimizations (LTO) mpx Enable support for Intel Memory Protection Extensions (MPX) nptl Enable support for Native POSIX Threads Library, the new threading module (requires linux-2.6 or better usually) objc Build support for the Objective C code language objc++ Build support for the Objective C++ language objc-gc Build support for the Objective C code language Garbage Collector pgo Build GCC using Profile Guided Optimization (PGO) sanitize Build support for various sanitizer functions (ASAN/TSAN/etc...) ssp Build packages with stack smashing protector on by default systemtap enable systemtap static probe points valgrind Enable valgrind annotations for gcc internals (useful for gcc debugging). vtv Build support for virtual table verification (a C++ hardening feature) gcc-apple bootstrap !DO NOT SET THIS FLAG YOURSELF! avoids need for autoconf during bootstrap stage2 objc Build support for the Objective C code language objc++ Build support for the Objective C++ language gcc-config cc-wrappers Install and manage 'cc' and 'f77' wrappers in /usr/bin. Otherwise ignore them. native-symlinks Install native symlinks like 'gcc' or 'g++' to /usr/bin. Otherwise keep only ${CTARGET}-gcc and friends. gdb client Install the main "gdb" program (most people want this) lzma Support lzma compression in ELF debug info multitarget Support all known targets in one gdb binary python Enable support for the new internal scripting language, as well as extended pretty printers server Install the "gdbserver" program (useful for embedded/remote targets) source-highlight Enable listing highlighting via dev-util/source-highlight xml Support parsing XML data files needed (at least) for cpu features, memory maps, and syscall tracing xxhash Use dev-libs/xxhash to speed up internal hashing. gettext cvs When running `autopoint`, use cvs to store the internal development files; this requires cvs at runtime, but will be faster/smaller than raw archives git When running `autopoint`, use git to store the internal development files; this requires git at runtime, but will be faster/smaller than raw archives llvm doc Build and install the HTML documentation and regenerate the man pages exegesis Enable performance counter support for llvm-exegesis tool that can be used to measure host machine instruction characteristics gold Build the gold linker plugin ncurses Support querying terminal properties using ncurses' terminfo xar Support dumping LLVM bitcode sections in Mach-O files (uses app-arch/xar) z3 Enable support for sci-mathematics/z3 constraint solver llvm-roc runtime Builds the compiler runtime libraries. parity vc10_0 Enable support for Visual Studio 2010 vc11_0 Enable support for Visual Studio 2012 vc12_0 Enable support for Visual Studio 2013 vc14_0 Enable support for Visual Studio 2015 vc15 Enable support for Visual Studio 2017 vc16 Enable support for Visual Studio 2019 vc8_0 Enable support for Visual Studio 2005 vc9_0 Enable support for Visual Studio 2008 vcx64 Enable support for 64bit Visual Studio compilers vcx86 Enable support for 32bit Visual Studio compilers sparse gtk Build the test-inspect utility (requires x11-libs/gtk+ version 2) llvm Build the sparse-llvm utility xml Build the c2xml utility (requires dev-libs/libxml2) sys-fabric mstflint adb-generic-tools Enable compiling the following tools: mstreg and mstlink inband Enable firmware updates for Mellanox SwitchX and ConnectIB devices ofed dapl Add support for DAPL abstraction layer diags Add dignostic tools for infiniband ibacm Add support for userspace pre-connection services opensm Add OpenSM - Subnet manager for infiniband perftest Add perftest utils qperf Add rdma tests rds Tools to manage rds sockets srp Suport for userspace part for srp initiator opensm tools Install ssld extra tool sys-firmware edk2-ovmf binary Use pre-built binaries intel-microcode hostonly only install ucode(s) supported by currently available (=online) processor(s) initramfs install a small initramfs for use with CONFIG_MICROCODE_EARLY split-ucode install the split binary ucode files (used by the kernel directly) vanilla install only microcode updates from Intel's official microcode tarball ipxe binary Use pre-built binaries efi Build an EFI program for using PXE iso Build a bootable ISO for using PXE lkrn Build a linux kernel bootable file for using with grub/etc... qemu Build the required PXE ROM images for app-emulation/qemu undi Build a Universal Network Device Interface driver chainloading your existing PXE NIC into iPXE usb Build a bootable USB image for using PXE vmware Build the PXE ROM images that VMWare uses seabios binary Use official upstream pre-built binaries seavgabios Include SeaVGABIOS binaries (replacement for vgabios) sgabios binary Use pre-built binaries sigrok-firmware-fx2lafw binary Use official upstream pre-built binaries vgabios binary Use official upstream pre-built binaries (only default and cirrus images) sys-fs android-file-transfer-linux fuse Add FUSE mount helper bees tools Build extra tools useful for debugging (fiemap, fiewalk) btrfs-progs convert Build ext2 conversion utility (btrfs-convert) reiserfs Enable reiserfs support in btrfs-convert tool. static Build static binaries in addition to the dynamic ones btrfsmaintenance systemd Enable systemd services and timers instead of cron timers cryfs custom-optimization Use user-defined compiler optimization level cryptmount argv0switch Default action given by progname. cswap Enable support for encrypted swap. fsck Check filesystems before mounting. gcrypt Support libgcrypt-encryption of keys. largefile Enable support for large files. luks Enable key management via LUKS mount Use systemd mount/umount for operations. openssl Support openssl-encryption of keys. cryptsetup argon2 Enable password hashing algorithm from app-crypt/argon2 gcrypt Use dev-libs/libgcrypt crypto backend kernel Use kernel crypto backend (mainly for embedded systems) luks1_default Default to LUKS1 on disk encryption format rather than new LUKS2 nettle Use dev-libs/nettle crypto backend openssl Use dev-libs/openssl crypto backend pwquality Use dev-libs/libpwquality for password quality checking reencrypt Build cryptsetup-reencrypt urandom Use /dev/urandom instead of /dev/random dmraid dietlibc Compile against dev-libs/dietlibc intel_led Enable Intel LED support klibc Compile against dev-libs/klibc led Enable LED support mini Create a minimal binary suitable for early boot environments dosfstools compat Install symlinks for legacy names of the tools e2fsprogs cron Install e2scrub_all cron script fuse Build fuse2fs, a FUSE file system client for ext2/ext3/ext4 file systems ecryptfs-utils gpg Enable app-crypt/gnupg key module openssl Enable dev-libs/openssl key module pkcs11 Enable PKCS#11 (Smartcards) key module tpm Enable support for Trusted Platform Module (TPM) using app-crypt/trousers eudev blkid enable blkid support efi enable EFI support hwdb read vendor/device string database and add it to udev database kmod enable module loading through libkmod rule-generator install legacy rule generator rules and support scripts - note that the functionality within was dropped from sys-fs/udev as it is not stable in all cases; use at your own risk smack enable SMACK security model ext4magic expert-mode Builds ext4magic with expert mode. Highly useful in recovering data from a corrupted filesystem file-attr Enable the recovery of file attributes (append, immutable, nodump etc) lessfs filelog Enable the ability to log to a file instead of syslog memtrace Enable leefs to create a report regarding the memory allocation. This feature should be used for debugging purposes to avoid performance degradation loop-aes extra-ciphers Enable extra ciphers keyscrub Protects the encryption key in memory but takes more cpu resources lvm2 device-mapper-only Build only device-mapper and not the rest of LVM2 (UNSUPPORTED) lvm2create_initrd Install lvm2create_initrd script and pull in sys-apps/makedev for the /sbin/MAKEDEV command sanlock Enable lvmlockd with support for sanlock thin Support for thin volumes mtpfs mad Enable handling of MP3's metadata multipath-tools rbd Enable Rados block device support via sys-cluster/ceph ntfs3g external-fuse Use external FUSE library instead of internal one. Must be disabled for unprivileged mounting to work. ntfsdecrypt Build and install the ntfsdecrypt application. ntfsprogs Include internal version of ntfsprogs. quota netlink Compile daemon receiving quota messages via netlink rpc Enable quota interaction via RPC squashfs-tools xz Enable support for XZ ("LZMA2") compression using app-arch/xz-utils squashfs-tools-ng tools Build the gensquashfs, rdsquashfs, sqfs2tar, sqfsdiff, and tar2sqfs tools xz Enable support for XZ ("LZMA2") compression using app-arch/xz-utils udev kmod Enable kernel module loading/unloading support using sys-apps/kmod udisks daemon Build the system daemon, not just the client tool elogind Use sys-auth/elogind for session tracking lvm Add support for Logical Volume Management via sys-fs/lvm2. systemd Support sys-apps/systemd's logind vdo Enable Virtual Data Optimizer support. zram Enable ZRAM support (requires sys-apps/systemd). zfs kernel-builtin Disable dependency on sys-fs/zfs-kmod under the assumption that ZFS is part of the kernel source tree minimal Don't install python scripts (arcstat, dbufstat etc) and avoid dependency on dev-lang/python pam Install zfs_key pam module, for automatically loading zfs encryption keys for home datasets rootfs Enable dependencies required for booting off a pool containing a rootfs test-suite Install regression test suite zfs-auto-snapshot cron Install /etc/cron.* files default-exclude Only take snapshots of datasets with com.sun:auto-snapshot=true property set zfs-kmod rootfs Install zfs-shutdown script to support exporting a pool containing rootfs sys-kernel aufs-sources experimental Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental". module Patch kernel to allow aufs being build as a module. vanilla Use vanilla kernel sources without applying genpatches. WARNING: This flag will drop all support from the Gentoo Kernel Security team bliss-kernel-bin initramfs Build initramfs along with the kernel. ck-sources experimental Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental". dracut debug Module installing additional tools like strace, file editor, ssh and more genkernel cryptsetup Enable support for Luks disk encryption using sys-fs/cryptsetup firmware Prefer system firmware sys-kernel/linux-firmware over local copy. gentoo-kernel initramfs Build initramfs along with the kernel. gentoo-kernel-bin initramfs Build initramfs along with the kernel. gentoo-sources experimental Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental". kpatch contrib Enable contrib kpatch services files. kmod Enable a kernel module (.ko file) which provides an interface for the patch modules to register new functions for replacement. kpatch Enable a command-line tool which allows a user to manage a collection of patch modules. kpatch-build Enable tools which convert a source diff patch to a patch module. linux-firmware initramfs Create and install initramfs for early microcode loading in /boot (only AMD for now) redistributable Install also non-free (but redistributable) firmware files savedconfig Allows individual selection of firmware files unknown-license Install firmware files whose license is unknown mips-sources experimental Apply experimental (80xx) patches. ip27 Enables additional support for SGI Origin (IP27) ip28 Enables additional support for SGI Indigo2 Impact R10000 (IP28) ip30 Enables support for SGI Octane (IP30, 'Speedracer') rt-sources deblob Remove binary blobs from kernel sources to provide libre license compliance. vanilla-kernel initramfs Build initramfs along with the kernel. xnu-headers man Install the manpages sys-libs binutils-libs 64-bit-bfd Support 64-bit targets even on 32-bit hosts (is ignored on 64-bit hosts) multitarget Enable all possible targets in libbfd compiler-rt clang Force building using installed clang (rather than the default CC/CXX). compiler-rt-sanitizers clang Force building using installed clang (rather than the default CC/CXX). libfuzzer Build fuzzing runtime. profile Build profiling runtime. sanitize Build sanitizer runtimes. xray Build XRay runtime. darwin-libc-headers man Install the manpages freeipmi nagios Install a nagios plugin to check sensors' status. gdbm berkdb enable compatibility layer for UNIX-like dbm and ndbm interfaces exporter enable gdbmexport binary for exporting data from gdbm-1.8 databases into gdbm-1.9 glibc cet Enable Intel Control-flow Enforcement Technology (needs binutils 2.29 and gcc 8) compile-locales build *all* locales in src_install; this is generally meant for stage building only as it ignores /etc/locale.gen file and can be pretty slow crypt build and install libcrypt and crypt.h debug When USE=hardened, allow fortify/stack violations to dump core (SIGABRT) and not kill self (SIGKILL) gd build memusage and memusagestat tools multiarch enable optimizations for multiple CPU architectures (detected at runtime) nscd Build, and enable support for, the Name Service Cache Daemon rpc Enable obsolete RPC/NIS layers ssp protect stack of glibc internals static-pie Enable static PIE support (runtime files for -static-pie gcc option). suid Make internal pt_chown helper setuid -- not needed if using Linux and have /dev/pts mounted with gid=5 systemtap enable systemtap static probe points gwenhywfar designer Build plugins for dev-qt/designer fox Use x11-libs/fox graphical toolkit qml Enable support for plugins using QML sensors Enable support for dev-qt/qtsensors module serialport Enable support for dev-qt/qtserialport module webkit Enable support for dev-qt/qtwebkit ldb doc Builds documentation ldap Enable LDAP support lmdb Enable LMDB backend python Enable Python support libblockdev bcache Enable block device cache support. cryptsetup Enable sys-fs/cryptsetup support device-mapper Enable support for device-mapper from sys-fs/lvm2 dmraid Support for dmraid devices, also known as ATA-RAID, or Fake RAID. escrow Support for building crypto plugin with escrow device support kbd Enable kernel block device support. lvm Enable support for Logical Volume Management via sys-fs/lvm2. tools Build tools vdo Enable Virtual Data Optimizer support. libcxx libcxxabi Build on top of sys-libs/libcxxabi instead of gcc's libsupc++ (avoids depending on gcc). libcxxrt Build on top of libcxxrt instead of gcc's libsupc++ (avoids depending on gcc). libunwind Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependence on gcc. libcxxabi libunwind Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependency on gcc libomp cuda Build CUDA offloading plugin (only with USE=offload) hwloc Enable CPU affinity support via hwloc offload Support offloading OpenMP using libomptarget ompt Enable OpenMP Tools Interface support libselinux pcre2 Use dev-libs/libpcre2 for fcontext regexes libunwind debug-frame Adds support for DWARF .debug_frame section: Use the information from this section if available libatomic Use libatomic instead of builtin atomic operations libxcrypt compat Build with compatibility interfaces for other crypt implementations system Install as system libcrypt.so rather than to an alternate directory (will collide with sys-libs/glibc's version) musl-nscd minimal Only installs the header files ncurses ada Add bindings for the ADA programming language tinfo Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode trace Enable test trace() support in ncurses calls ncurses-compat tinfo Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode newlib nano Build additional newlib-nano library pam berkdb Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication. readline utils Install rlfe (ReadLine Front-End) helper tool -- a wrapper program for making any stdin use readline talloc compat Enable extra compatibility stuff timezone-data leaps-timezone Install the set of "right" timezones; these timezones include leap seconds when counting seconds since the epoch (while POSIX does not) as they are based on the TAI (International Atomic Time) clock uclibc-ng symlink-compat Explicitly add sym links for libdl.so.0, libm.so.0, and friends for backward compatibility with sys-libs/uclibc-ng-1.0.17 and earlier zlib minizip include the minizip library for quick and dirty zip extraction sys-power apcupsd modbus Enable MODBUS support over USB intel-undervolt elogind Use elogind hook to apply voltage after system sleep nut ipmi Support IPMI-based UPSes. ups_drivers_al175 Driver for Eltek UPS models with AL175 alarm module ups_drivers_apcsmart Driver for American Power Conversion Smart Protocol UPS equipment ups_drivers_apcsmart-old Driver for American Power Conversion Smart Protocol UPS equipment ups_drivers_apcupsd-ups Driver for apcupsd client access ups_drivers_bcmxcp Driver for UPSes supporting the serial BCM/XCP protocol ups_drivers_bcmxcp_usb Experimental driver for UPSes supporting the BCM/XCP protocol over USB ups_drivers_belkin Driver for Belkin serial UPS equipment ups_drivers_belkinunv Driver for Belkin "Universal UPS" and compatible ups_drivers_bestfcom Driver for Best Power Fortress/Ferrups ups_drivers_bestfortress Driver for old Best Fortress UPS equipment ups_drivers_bestuferrups Driver for Best Power Micro-Ferrups ups_drivers_bestups Driver for Best Power / SOLA (Phoenixtec protocol) UPS equipment ups_drivers_blazer_ser Driver for Megatec/Q1 protocol serial based UPS equipment ups_drivers_blazer_usb Driver for Megatec/Q1 protocol USB based UPS equipment ups_drivers_clone Fake driver to clone outlets for device grouping ups_drivers_clone-outlet Fake driver to clone outlets for device grouping ups_drivers_dummy-ups Driver for multi-purpose UPS emulation ups_drivers_etapro Driver for ETA UPS equipment ups_drivers_everups Driver for Ever UPS models ups_drivers_gamatronic Driver for Gamatronic UPS equipment ups_drivers_genericups Driver for contact-closure UPS equipment ups_drivers_isbmex Driver for ISBMEX UPS equipment ups_drivers_ivtscd driver for the IVT Solar Controller Device ups_drivers_liebert Driver for Liebert contact-closure UPS equipment ups_drivers_liebert-esp2 Driver for Liebert UPS, using the ESP-II serial protocol ups_drivers_masterguard Driver for Masterguard UPS equipment ups_drivers_metasys Driver for Meta System UPS equipment ups_drivers_mge-shut Driver for SHUT Protocol UPS equipment ups_drivers_mge-utalk Driver for MGE UPS SYSTEMS UTalk protocol equipment ups_drivers_microdowell Driver for Microdowell Enterprise UPS series ups_drivers_netxml-ups Driver for Eaton / MGE Network Management Card / Proxy (XML/HTTP Protocol) equipment ups_drivers_nut-ipmipsu Driver for IPMI Power Supply Units (PSU) ups_drivers_nutdrv_qx Driver for Q* protocol serial and USB based UPS equipment ups_drivers_oldmge-shut Driver for SHUT Protocol UPS equipment (older implementation) ups_drivers_oneac Driver for Oneac UPS equipment ups_drivers_optiups Driver for Opti-UPS (Viewsonic) UPS and Zinto D (ONLINE-USV) equipment ups_drivers_powercom UPS driver for serial Powercom/Trust/Advice UPS equipment ups_drivers_powerpanel Driver for PowerPanel Plus compatible UPS equipment ups_drivers_rhino Driver for Brazilian Microsol RHINO UPS equipment ups_drivers_richcomm_usb Driver UPS equipment using Richcomm dry-contact to USB solution ups_drivers_riello_ser Driver for Riello UPS Protocol UPS equipment ups_drivers_riello_usb Driver for Riello UPS Protocol UPS equipment via USB ups_drivers_safenet Driver for SafeNet compatible UPS equipment ups_drivers_snmp-ups Multi-MIB Driver for SNMP UPS equipment ups_drivers_solis Driver for Brazilian Microsol SOLIS UPS equipment ups_drivers_tripplite Driver for Tripp-Lite SmartPro UPS equipment ups_drivers_tripplite_usb Driver for older Tripp Lite USB UPSes (not PDC HID) ups_drivers_tripplitesu Driver for Tripp-Lite SmartOnline (SU) UPS equipment ups_drivers_upscode2 Driver for UPScode II compatible UPS equipment ups_drivers_usbhid-ups Driver for USB/HID UPS equipment ups_drivers_victronups Driver for IMV/Victron UPS unit Match, Match Lite, NetUps nvclock gtk Install the GTK+ based graphical interface nvcontrol Add NVCONTROL support for OpenGL options pm-utils ntp Install support for net-misc/ntp powermgmt-base pm-utils Adds support for on_ac_power through sys-power/pm-utils sispmctl gemplug Install gemplug (management script) suspend crypt Allows suspend and resume from encrypted disk sys-process audit gssapi Enable GSSAPI support criu setproctitle Make process titles of service workers to be more verbose cronie anacron Install the periodic anacron command scheduler. inotify Enable inotify filesystem monitoring support. fcron debug Enable debug code and output. Since version 3.0.5 this will no longer force foreground execution, and fcron will be able to run as a service properly. mta Enable mta support for sending emails from fcron pam Enable PAM support for fcron. This means that fcron will pass through the "fcron" stack before executing the jobs, and fcrontab will use the "fcrontab" stack to authenticate the user before editing its crontab file. system-crontab Set up fcron to respect /etc/crontab and /etc/cron.d. If this flag is disabled, /etc/cron.d and /etc/crontab will be ignored, but /etc/cron.{hourly,daily,weekly,monthly} will still be respected. htop openvz Enable openvz support vserver Enable vserver support lsof rpc support looking up RPC service info procps elogind Use sys-auth/elogind for session tracking. kill Build the kill program modern-top Enables new startup defaults of top. Keeps old defaults if disabled ncurses Build programs that use ncurses: top, slabtop, watch systemd-cron cron-boot Include support for the boot timer. etc-crontab-systemd Use dedicated /etc/crontab-systemd instead of parsing /etc/crontab minutely Support /etc/cron.minutely setgid Compile setgid C helper for crontab. Needs GCC or Clang. yearly Support /etc/cron.yearly tini args Enable argument parsing. virtual blas eselect-ldso Enable runtime library switching by eselect and ld.so. cblas eselect-ldso Enable runtime library switching by eselect and ld.so. ffmpeg opus Use the external opus library for encoding and decoding. lapack eselect-ldso Enable runtime library switching by eselect and ld.so. lapacke eselect-ldso Enable runtime library switching by eselect and ld.so. linux-sources firmware Install linux kernel firmware mpi romio Enable romio, a high-performance portable MPI-IO mysql embedded Build embedded server (libmysqld) server Build server (mysqld) podofo-build boost Add support for boost tools Build and install commandline tools. ssh minimal Prefer net-misc/dropbear over net-misc/openssh wine staging Enable Wine-Staging's Patchset www-apache mod_backtrace unwind Use sys-libs/libunwind to provide better resolution of function names. mod_extract_forwarded mod-proxy Enable support for Apache's internal proxy mod_musicindex archive Add archive support cache Add File cache support mysql Add MySQL cache support mod_nss ecc enable Elliptical Curve Cyptography mod_perl ithreads Build for use with thread-capable perl, needs same setting as in dev-lang/perl mod_security fuzzyhash Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package. geoip Pull in dev-libs/geoip for use by the SecGeoLookupDb directive. jit Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems. json Suppose JSON in the request body parser through dev-libs/yajl. mlogc Build and install the ModSecurity Audit Log Collector (mlogc). pwauth domain-aware Ignore leading domain names in username (Windows compat) faillog Log failed login attempts ignore-case Ignore string case in username (mostly Windows compat) www-apps blohg git Enable Git support mercurial Enable Mercurial support cgit highlight Enable source code highlighting lua Enable support for Lua scripting drupal uploadprogress Install dev-php/pecl-uploadprogress package gitea acct User and group management via acct-*/git packages build-client Build the client code, instead of using a precompiled one gitit plugins enables optional plugin runtime loader hugo sass Enable SASS/SCSS support icingaweb2 apache2-server Adds support for the apache2-server fpm Adds FPM support to php nginx Adds support for nginx ikiwiki extras Installs additional modules used by ikiwiki plugins kibana-bin x-pack Enable additional features (may need a license) klaus ctags Enable support for Exuberant ctags; makes all source code symbols hyperlinks to their definitions nikola assets Support web asset management charts Support chart generation through dev-python/pygal ghpages Add support for direct uploading to github pages hyphenation Add hyphenation support through dev-python/pyphen ipython Add IPython notebook compilation and LESS support jinja Add support for dev-python/jinja as alternative templating engine to Mako server Enable support for built-in web server using dev-python/aiohttp watchdog Use dev-python/watchdog to monitor file system events webmedia Use dev-python/micawber to extract metadata from web media links websocket Add websocket support thru dev-python/ws4py postfixadmin vacation Install vacation.pl script and dependencies radicale bcrypt Depend on passlib to enable bcrypt and md5 authentication methods redmine markdown Enable support for Markdown passenger Enable support for www-apache/passenger roundup jinja Enable Jinja2 support markdown Enable markdown rendering pyjwt Enable jwt tokens for login tz Enable full support of timezone whoosh Enable Whoosh full-text indexer xapian Enable Xapian full-text indexer rt lighttpd Add www-servers/lighttpd support tt-rss daemon Install additional init scripts for automated RSS updates webdavcgi rcs Adds support for a revision controlled backend with RCS (dev-vcs/rcs) websvn enscript Add enscript support to colorize code stored in the repository wordpress akismet Installs Akismet comment spam plug-in themes Installs themes (including default theme) www-client chromium component-build Split build into more shared libraries to speed up linking. Mostly intended for debugging and development, NOT RECOMMENDED for general use. hangouts Enable support for Google Hangouts features such as screen sharing headless Build Ozone only with headless backend, NOT RECOMMENDED for general use. js-type-check Enable JavaScript type-checking for Chrome's web technology-based UI. Requires Java. official Enable Official build instead of Developer build. ozone Enable Ozone platform abstraction layer with X11 backend. ozone-wayland Enable Wayland backend for Ozone. pic Disable optimized assembly code that is not PIC friendly proprietary-codecs Enable codecs for patent-encumbered audio and video formats. suid Build the SUID sandbox, which is only needed on CONFIG_USER_NS=n kernels system-ffmpeg Use system ffmpeg instead of the bundled one system-icu Use system icu instead of the bundled one system-libvpx Use system libvpx instead of the bundled one tcmalloc Use bundled tcmalloc instead of system malloc widevine Unsupported closed-source DRM capability (required by Netflix VOD) dillo xembed Enable X11 XEmbed support elinks bittorrent Enable support for the BitTorrent protocol brotli Enable support for brotli compression finger Enable support for the finger protocol gopher Enable support for the gopher protocol mouse Make elinks to grab all mouse events tre Enable support for regex searches via dev-libs/tre xml Enable support for bookmarks via dev-libs/expat firefox clang Use Clang compiler instead of GCC eme-free Disable EME (DRM plugin) cabability at build time geckodriver Enable WebDriver support gmp-autoupdate Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles hwaccel Force-enable hardware-accelerated rendering (Mozilla bug 594876) lto Enable Link Time Optimization (LTO). Requires Gold linker when using GCC or LDD linker when using Clang openh264 Use media-libs/openh264 for H.264 support instead of downloading binary blob from Mozilla at runtime pgo Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time. screencast Enable support for remote desktop and screen cast using media-video/pipewire system-av1 Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled. system-harfbuzz Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled. system-icu Use the system-wide dev-libs/icu instead of bundled. system-jpeg Use the system-wide media-libs/libjpeg-turbo instead of bundled. system-libevent Use the system-wide dev-libs/libevent instead of bundled. system-libvpx Use the system-wide media-libs/libvpx instead of bundled. system-webp Use the system-wide media-libs/libwebp instead of bundled. firefox-bin gmp-autoupdate Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles jd migemo Enable migemo support for Japanese oniguruma Use dev-libs/oniguruma for regular expression links brotli Enable app-arch/brotli support freetype Enable media-libs/freetype support libevent Enable dev-libs/libevent support lzip Enable app-arch/lzip support lynx gnutls Use gnutls library for HTTPS support (openssl is the default library for HTTPS support). ssl Enable HTTPS support. netsurf bmp BMP bitmap image support (media-libs/libnsbmp) duktape Use duktape.org javascript engine gtk Build GTK3 GUI gtk2 Build GTK2 GUI psl Use public suffix list via media-libs/libnspsl rosprite RISC OS Sprite bitmap image support (media-libs/librosprite) svgtiny SVG image support via media-libs/svgatiny instead of gnome-base/librsvg otter webengine Use dev-qt/qtwebengine as backend instead of dev-qt/qtwebkit (experimental) qutebrowser scripts Installs userscripts from the misc/userscripts directory to /usr/share/qutebrowser/userscripts. seamonkey calendar Build Mozilla's calendar chatzilla Build Mozilla's IRC client (default on) custom-optimization Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported) gmp-autoupdate Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles ipc Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes roaming Build roaming extension support (default on) system-harfbuzz Use the system-wide media-libs/harfbuzz instead of bundled system-icu Use the sytem-wide dev-libs/icu instead of bundled system-jpeg Use the system-wide media-libs/libjpeg-turbo instead of bundled system-libevent Use the system-wide dev-libs/libevent instead of bundled system-libvpx Use the system-wide media-libs/libvpx instead of bundled system-sqlite Use the system-wide dev-db/sqlite installation with secure-delete enabled surf savedconfig Without a saved config.h, this package depends on net-misc/curl and x11-terms/st for a default download mechanism uget aria2 Enable support for net-misc/aria2 through xmlrpc. You'll find the plugin in the app's settings. control-socket Enable JSON-RPC over unix domain socket openssl Use dev-libs/openssl instead of net-libs/gnutls rss Enable uGet feed messages w3m gdk-pixbuf Enable support for x11-libs/gdk-pixbuf lynxkeymap If you prefer Lynx-like key binding www-misc litmus libproxy Support for automatic proxy configuratino management through net-libs/libproxy. libxml2 Use dev-libs/libxml2 to parse XML pkcs11 Support for PKCS #11 through PaKChoiS (dev-libs/pakchois). vdradmin-am vdr Support for media-video/vdr. Disable this if the VDR you want to control runs at a remote machine. xxv themes Enable more themes via x11-themes/xxv-skins www-plugins adobe-flash nsplugin Install the Netscape Flash API plugin (for Firefox and similar browsers) ppapi Install the Pepper Flash API plugin (for Chrome and similar browsers) lightspark ppapi Install the PPAPI plugin (for Chromium) rtmp Enable Real Time Messaging Protocol using librtmp passff-host chrome Install plugin for chrome (which also includes opera) chromium Install plugin for chromium firefox Install plugin for firefox vivaldi Install plugin for vivaldi www-servers apache static Link in apache2 modules statically rather then plugins suexec Install suexec with apache suexec-caps Install suexec with capabilities instead of SUID suexec-syslog Log suexec to syslog instead of to a separate file civetweb server Build standalone server fnord auth Enable HTTP authentication support gatling diet Compile against dev-libs/dietlibc h2o libh2o Build and install libh2o mruby Enable support for mruby lighttpd libev Enable fdevent handler mmap Use mmap with files owned by lighttpd. This is a dangerous option as it may allow local users to trigger SIGBUS crashes. rrdtool Enable rrdtool support via mod_rrdtool webdav Enable webdav properties monkeyd debug Enable lots of debugging info static-plugins Build statically linked plugins nginx aio Enables file AIO support http Enable HTTP core support http-cache Enable HTTP cache support http2 Enable HTTP2 module support libatomic Use libatomic instead of builtin atomic operations luajit Use dev-lang/luajit instead of dev-lang/lua for lua support when building the lua http module. pcre-jit Enable JIT for pcre rtmp NGINX-based Media Streaming Server ssl Enable HTTPS module for http. Enable SSL/TLS support for POP3/IMAP/SMTP for mail. nginx-unit php7-2 Support for PHP 7.2 php7-3 Support for PHP 7.3 php7-4 Support for PHP 7.4 pshs magic Enable automatic detection of Content-Type using libmagic (sys-apps/file) netlink Use libnetlink (sys-apps/iproute2) to get network interface addresses qrcode Enable generating QRCodes for server URL resin admin Enable Resin admin webapp sniproxy dns Enable DNS resolver via net-libs/udns largefile Enable large file support (so we can log more than 2GB) rfc3339 Use RFC3339 timestamp format in log. tomcat extra-webapps Build also the docs and examples webapp websockets Builds websockets api and implementation (requires java 7) uwsgi embedded Embed plugins instead of building them as real plugins. When disabling this USE flag make sure you specify all used plugins in your uWSGI configuration. Note: Language plugins will always be built as real plugins. go Build the gccgo plugin to run Go applications. json Support json as a configuration file format. python-asyncio Use the EXPERIMENTAL asyncio (tulip) for python3.4 async request dispatching and as LoopEngine (see http://uwsgi-docs.readthedocs.org/en/latest/asyncio.html). python-gevent Use dev-python/gevent for async request dispatching and as LoopEngine (see http://projects.unbit.it/uwsgi/wiki/Gevent). routing Enable routing support yajl Use dev-libs/yajl instead of dev-libs/jansson for parsing JSON configuration files (if USe=json is set) yaml Support yaml as a configuration file format. zeromq Enable logging and deployment via ZeroMQ. xsp developer creates .mdb files for either Release and Debug net35 use .NET 3.5 Framework net40 use .NET 4.0 Framework net45 use .NET 4.5 Framework x11-apps copyq webkit enables the application to use advanced HTML rendering and fetching remote images and other data igt-gpu-tools X Enable intel-gpu-overlay xlib/cairo backend chamelium Enables support for building Chamelium tests man Build and install man pages overlay Build the intel-gpu-overlay utility runner Build the test runner tests Build and install tests valgrind Support valgrind annotations xv Enable intel-gpu-overlay xv backend mesa-progs egl Build EGL utilities gles2 Build OpenGL ES 2 utilities xdpyinfo dmx Builds support for Distributed Multiheaded X x11-base/xorg-server xinit twm Control dependencies on legacy apps (xterm, twm, ...). Safe to disable if you use a modern desktop environment. xsm rsh This allows the use of rsh (remote shell) and rcp (remote copy). x11-base xorg-server dmx Build the Distributed Multiheaded X server elogind Use elogind to get control over framebuffer when running as regular user kdrive Build the kdrive X servers libglvnd Use libglvnd for dispatch. unwind Enable libunwind usage for backtraces xcsecurity Build Security extension xephyr Build the Xephyr server xnest Build the Xnest server xorg Build the Xorg X server (HIGHLY RECOMMENDED) xvfb Build the Xvfb server xorg-x11 fonts Install fonts from X.Org x11-drivers nvidia-drivers X Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries compat Install non-GLVND libGL for backwards compatibility driver Install the kernel driver module gtk3 Install nvidia-settings with support for GTK+ 3 kms Enable support for kernel mode setting (KMS) libglvnd Use media-libs/libglvnd for dispatch tools Install additional tools such as nvidia-settings uvm Install the Unified Memory kernel module (nvidia-uvm) for sharing memory between CPU and GPU in CUDA programs xf86-video-geode ztv Enable building the V4L2 ZTV driver xf86-video-intel sna Enable SandyBridge's New Acceleration (useful on all chipsets, not just SandyBridge) tools Build the intel-virtual-output tool uxa Enable UMA Acceleration Architecture xvmc Enables X-Video Motion Compensation support xf86-video-openchrome viaregtool Install registers dumper tool x11-libs agg gpc Enable gpc polygon clipper library cairo gles2-only Build the OpenGL ES 2 backend glib Compile with GLib Object System support opengl Build the OpenGL backend utils Build support for Cairo script and trace utilities valgrind Built-in support to mark memory regions fltk games Builds and installs some extra games fox tools Install adie, calculator, shutterbug, and pathfinder apps. gdk-pixbuf X Build and install the legacy gdk_pixbuf_xlib-2.0 library gtk+ broadway Enable the GDK Broadway backend. cloudprint Enable printing via Google Cloud Print. colord Use x11-misc/colord for color management in printing gtkdatabox glade Build with libglade and glade-3 supports, which includes a glade's module for GtkDataBox widget gtkmathview mathml Install additional fonts for proper mathml support. t1lib Enable media-libs/t1lib support gtksourceview glade Install a glade catalog file libQGLViewer designer Installs dev-qt/designer plugin. libSM uuid Use UUID for session identification instead of IP address and system time. libXaw deprecated Install deprecated Xaw6 library. libXfont2 bzip2 Support bzip2 compressed PCF fonts. truetype Use media-libs/freetype for font rasterization. libdlo test-program Build the program for testing Displaylink devices. libdrm libkms Enable building of libkms, a library for applications to interface with KMS valgrind Compile in valgrind memory hints libfm automount Use gnome-base/gvfs for automounting udisks Use libfm's udisks-based volume monitor implementation instead of using the one from gvfs vala Support custom actions in menus libva drm Enables VA/DRM API support. utils Install VA-API utility programs. libva-compat drm Enables VA/DRM API support. egl Enables EGL support. libwnck tools Install wnckprop-3 and wnck-urgency-monitor-3 command-line tools libxcb xkb Enable the XCB keyboard extension motif motif22-compatibility Compatibility with Open Motif 2.2 pango X Build and install the legacy pangoxft library pixman loongson2f Enable Loongson2f MMI optimizations. qscintilla designer Build plugin for Qt Designer qwt designer Installs dev-qt/designer plugin. mathml Use the MathML renderer of the Qt solutions package. tslib evdev Build experimental input module uinput Provide alternative ts_uinput evdev device vte icu Enable legacy charset support using dev-libs/icu systemd Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM wxGTK gstreamer Enable the wxMediaCtrl class for playing audio and video through gstreamer. sdl Use Simple Directmedia Layer (media-libs/libsdl) for audio. x11-misc alock doc Build and install manpage with app-text/asciidoc. bumblebee bbswitch Add dependency on sys-power/bbswitch for PM feature colord argyllcms Enable ArgyllCMS sensor extra-print-profiles Generate extra print profiles. Warning: significant build time and memory requirements. gusb Enable dev-libs/libgusb support, needed for colorimeter drivers compton drm Enable VSync with DRM_IOCTL_WAIT_VBLANK opengl Enable VSync with SGI_swap_control OpenGL extension dunst dunstify Experimental replacement for notify-send. e16-keyedit gtk2 Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 fbpager xrender Enable transparency support via x11-libs/libXrender gpaste applet Enable gpaste-applet gnome Enable proper gnome support and enable gnome shell extension. gtkdialog glade Enable support for gnome-base/libglade gtk2 Build with GTK+2 instead of GTK+3 vte Enable support for x11-libs/vte i3status filecaps Linux capabilities library is required for i3status to be able to read net bandwith j4-dmenu-desktop dmenu Use x11-misc/dmenu as default. Disable to use a different implementation. ktsuss sudo Use the sudo backend instead the su one light-locker dpms Turn on the display on screensaver deactivation. screensaver Lock the screen on screensaver activation. lightdm gtk Pull in the gtk+ greeter non_root Use non-root user by default mugshot gnome Add support for gnome-base/gnome-control-center libreoffice Add support for app-office/libreoffice and app-office/libreoffice-bin webcam Add support for setting a profile photo in media-video/cheese openbox-menu icons Enable support for icons in menus svg Support SVG icons picom config-file Enable config file support doc Build documentation and man pages (requires app-text/asciidoc) drm Enable support for using drm for vsync opengl Enable features that require opengl (opengl backend, and opengl vsync methods) polybar i3wm Add support for i3 window manager ipc Add support for Inter-Process Messaging mpd Add support for Music Player Daemon network Enable network support primus libglvnd Use media-libs/libglvnd for dispatch py3status gevent Install extra requirement dev-python/gevent to enable green threads. udev Install extra requirement dev-python/pyudev to enable udev events monitoring on modules. qt5ct dbus Enable system tray and global menu support qtfm dbus Install the qtfm-tray removable device manager shared Install the libQtFM shared library and headers redshift geoclue Control dependency on app-misc/geoclue rofi drun Enable desktop file run dialog windowmode Enable normal window mode rss-glx quesoglc Enable support for OpenGL Character Renderer sddm elogind Use sys-auth/elogind for session tracking. sent savedconfig Without a saved config.h, this package depends on media-gfx/farbfeld for image conversions spacefm gtk2 Support GTK+ 2.x instead of GTK+ 3.x gtk3 Support GTK+ 3.x instead of GTK+ 2.x video-thumbnails Support video thumbnails with media-video/ffmpegthumbnailer stalonetray graceful-exit use non-portable hack to exit gracefuly on signal tint2 battery Enable battery status plugin tint2conf Build/Install tint2conf as well urxvt-perls deprecated Install scripts which have been marked as deprecated by upstream vnc2swf x11vnc Install script that depends on x11vnc wbar gtk Enables the gtk-based wbar-config GUI x11vnc xdamage Enable support for the Xdamage library xfixes Enable support for the Xfixes library xrandr Enable support for the X xrandr extension xkbd evdev Enable dev-libs/libevdev support for xtg xi Enable XInput2 support through x11-libs/libXi xrandr Enable XRandR support through x11-libs/libXrandr xkbset tk Install the dev-perl/Tk based xkbset-gui utility xlockmore vtlock Enables support for virtual terminal locking xlockrc Enables xlockrc for people without PAM xmobar alsa Use alsa-mixer to get the volume from soundcards dbus Publish a service on the session bus for controlling xmobar inotify inotify support (modern Linux only). Required for the Mail and MBox plugins iwlib Wireless info support via Wext ioctls (deprecated) mpd Support mpd plugin mpris Enables MPRIS v1, v2 support rtsopts Reduce process wakekups frequency to decrease CPU usage timezone Enables localized date support uvmeter Plugin to show UV data for Australia weather Enable weather plugin wifi Wireless info support via nl80211. Required for the Wireless plugin on systems running Linux xft Use Xft to render text. UTF-8 support included xpm Enable usage of xpm for icons xscreensaver gdk-pixbuf Include support for the x11-libs/gdk-pixbuf library in some demos, which will make it possible for them to read GIF, JPEG, and PNG files as well gdm Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm locking Compile in support for locking the display new-login Enable user switching support using gdmflexiserver (x11-misc/lightdm) xsr cursor Capture mouse cursor using x11-misc/xdotool, and place them on the screenshots using media-gfx/imagemagick xss-lock man Build and install man pages yabar playerctl Uses media-sound/playerctl to retrieve the name of the currently played song x11-plugins bfm gkrellm Enable building of app-admin/gkrellm module e16-epplets cdaudio Enable CD Audio support using media-libs/libcdaudio libgtop Use gnome-base/libgtop to obtain system load information pidgin-mbpurple twitgin Enable graphical plugin for Gtk+ interface of Pidgin. pidgin-sipe ocs2005-message-hack Disable message timeout for OCS2005 clients which causes "false" not delivered error messages openssl Enable crypto support via dev-libs/openssl telepathy Support use as a telepathy backend voice Enable experimental voice/video support pidgin-telegram gcrypt Use dev-libs/libgcrypt instead of dev-libs/openssl. vicious contrib Install extra widgets, some for less common hardware, some contributed by Vicious users. wmbattery apm Add APM (Advanced Power Management) support wmfire session Enable session management wmudmount gcr Enable support for secure memory with app-crypt/gcr secret Enable support for secret service with app-crypt/libsecret x11-terms aterm background Enable background image support via media-libs/libafterimage xgetdefault Enable resources via X instead of aterm small version eterm escreen Enable built-in app-misc/screen support utempter Include libutempter support gnome-terminal gnome-shell Integrate with gnome-base/gnome-shell search nautilus Build gnome-base/nautilus extension guake utempter Include utmp management support via sys-libs/libutempter mlterm brltty Enable support for app-accessibility/brltty fcitx Enable support for app-i18n/fcitx gtk2 Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3 harfbuzz Enable support for OpenType Layout (media-libs/harfbuzz) ibus Enable support for app-i18n/ibus libssh2 Enable support for net-libs/libssh2 regis Enable support for ReGIS scim Enable support for app-i18n/scim skk Enable support for SKK (virtual/skkserv or app-i18n/skk-jisyo) uim Enable support for app-i18n/uim utempter Enable support for sys-libs/libutempter wayland Enable support for Wayland mrxvt menubar Enable mrxvt menubar utempter REcords user logins. Useful on multi-user systems rxvt-unicode 256-color Enable 256 color support blink Enable blinking text fading-colors Enable colors fading when off focus font-styles Enable support for bold and italic fonts gdk-pixbuf Enable transparency support using x11-libs/gdk-pixbuf iso14755 Enable ISO-14755 support mousewheel Enable scrolling via mouse wheel or buttons 4 and 5 perl Enable perl script support. You can still disable this at runtime with -pe "" unicode3 Use 21 instead of 16 bits to represent unicode characters utmp Enable utmp support wtmp Enable wtmp support terminator libnotify Enables desktop notifications via x11-libs/libnotify terminology extras Install additional testing tools xfce4-terminal utempter Include utmp management support via sys-libs/libutempter xterm openpty Use openpty() in preference to posix_openpt() sixel Enable sixel graphics support toolbar Enable the xterm toolbar to be built x11-themes arc-theme cinnamon Install theme for gnome-extra/cinnamon gnome-shell Install theme for gnome-base/gnome-shell gtk2 Install GTK+2 theme gtk3 Install GTK+3 theme mate Install Metacity theme for mate-base/mate pre-rendered Avoid media-gfx/inkscape and media-gfx/optipng dependencies by using pre-rendered PNGs xfce Install theme for xfce-base/xfwm4 comix-xcursors lefthanded Install lefthanded version of theme in addition to default one opaque Install non-transparent version of theme in addition to default one gentoo-artwork grub Install extra sys-boot/grub themes icons Install icons lilo Install extra sys-boot/lilo themes pixmaps Install pixmaps greybird gtk2 Install theme for GTK+-2.0 gtk3 Install theme for GTK+-3.0 xfce Install theme for xfce-base/xfwm4 gtk-engines-murrine animation-rtl Progressbar animation from right to left themes Pull in themes via x11-themes/murrine-themes gtk-engines-nodoka animation-rtl Progressbar animation from right to left kfaenza additional Install additional KFaenza icons. See third homepage for details light-themes gtk3 Support GTK 3.x, too mate-themes-meta gtk2-only Allow dependency-resolution for a system without GTK+3 redhat-artwork audacious Install media-sound/audacious theme cursors Install Bluecurve cursors gdm Install Bluecurve gnome-base/gdm theme icons Install Bluecurve icons nautilus Install Bluecurve gnome-base/nautilus icons vertex-theme cinnamon Install theme for gnome-extra/cinnamon gnome-shell Install theme for gnome-base/gnome-shell mate Install Metacity theme for mate-base/mate xfce Install theme for xfce-base/xfwm4 zuki-themes gnome-shell Install theme for gnome-base/gnome-shell mate Install Metacity theme for mate-base/mate xfce Install theme for xfce-base/xfwm4 zukitwo gnome-shell Install theme for gnome-base/gnome-shell x11-wm e16 container Use container window (experimental) debug Build libtrip debugging library dialogs Enable support for configuration dialogs libhack Build libhack window mode helper library modules Enable support for loadable modules pango Enable pango font rendering using x11-libs/pango themes Install the official E16 themes using x11-themes/e16-themes xi2 Enable the experimental multipointer input XInput2. This incldues the MultiPointer X feature xpresent Enable support for the X Present extension via x11-libs/libXpresent xrandr Enable support for the X RandR extension via x11-libs/libXrandr xrender Enable transparency support using the X Render extension via x11-libs/libXrender xsm Enable X Session Management support using x11-libs/libSM xsync Enable X Sync support zoom Support resolution change of current window (zoom) usingx11-libs/libXxf86vm (xvidtune) echinus xrandr Enable support for multihead configuration enlightenment xwayland Enable XWayland application support fluxbox slit Enables the Fluxbox slit (or dock) systray Enables the system tray in the Fluxbox toolbar toolbar Enables the Fluxbox toolbar fvwm gtk2-perl Enable GTK2 Perl bindings lock Enable screen locking netpbm Enable NetPBM support (used by FvwmScript-ScreenDump) rplay Enable rplay support stroke Mouse Gesture support i3 doc Build and install the HTML documentation and regenerate the man pages icewm gdk-pixbuf Enable gdk-pixbuf rendering lumina desktop-utils Build and install lumina's desktop-utils metacity libcanberra Enable sound event support using media-libs/libcanberra vulkan Enable Vulkan based compositor support via META_COMPOSITOR=vulkan environment variable musca apis Optionally install the experimental `apis' window manager xlisten Optionally install the xlisten utility mutter elogind Rely on sys-auth/elogind as logind provider for Wayland sessions screencast Enable support for remote desktop and screen cast using media-video/pipewire sysprof Enable profiling data capture support using dev-util/sysprof-capture notion xrandr Add support for xrandr openbox session Enables support for session managers xdg Install the python xdg files for xdg autostart pekwm contrib Install optional extras in the documentation directory themes Install additional themes ratpoison history Use sys-libs/readline for history handling sloppy Install sloppy, a focus-follows-mouse implementation for ratpoison xrandr Enable support for XRandR stumpwm contrib Install contrib modules doc Include documentation subtle xrandr Enable support for the X RandR extension xtest Enable support for the XTest extension vtwm rplay Enable rplay support, needed for sound. windowmaker modelock Enable XKB language status lock support. README says: "If you don't know what it is you probably don't need it." xrandr Enable XRandR window extension support wmfs imlib2 Enable image support through media-libs/imlib2 xmonad no-autorepeat-keys Allow ignoring of keyboard autorepeat. xpra client Build client-side code clipboard Enable clipboard support csc Enable csc softscaler support dec_avcodec2 Enable avcodec2 decoder support enc_ffmpeg Enable advanced ffmpeg/libav encoder support enc_x264 Enable x264 encoder support enc_x265 Enable x265 encoder support pillow Enable pillow support server Build server-side code vpx Enable vpx image format support webcam Enable webcam support via opencv xfce-base exo gtk2 Build deprecated GTK+2 libexo-1 library. garcon gtk2 Build the garcon-gtk2-1 library (required for xfce-base/xfce4-panel < 4.13 only). libxfce4ui glade Build support for Glade 3's GtkBuilder implementation gtk2 Build deprecated GTK+2 libxfce4ui-1 library. libgtop Enable system information via gnome-base/libgtop. thunar trash-panel-plugin Build the trash status indicator plugin for the XFCE panel xfce4-panel gtk2 Enable GTK+2 plugin support. xfce4-settings libcanberra Enable sound event support using media-libs/libcanberra xklavier Enable keyboard layout selection support using x11-libs/libxklavier xfdesktop thunar Build support for desktop icons (for example, launchers and folders) xfwm4 xpresent Enable the XPresent extension for sync to vblank xfce-extra tumbler odf Enable support for .odf thumbnailers by using gnome-extra/libgsf xfce4-clipman-plugin qrcode Enable support for media-gfx/qrencode xfce4-mpc-plugin libmpd Build using media-libs/libmpd backend, instead of native fallback which is preferred xfce4-power-manager panel-plugin Build the power management plugin for the XFCE panel xfce4-pulseaudio-plugin keybinder Enable support for global hotkeys using dev-libs/keybinder. wnck Enable experimental support for raising media player windows using x11-libs/libwnck. xfce4-screensaver locking Enable screen locking support Questions or comments? 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