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Gentoo Linux Use Variable Descriptions

Content:

1.  Global Use Flags

Flag Description
3dfx Enable support for Voodoo chipsets, also called as 3DFX and TDFX
3dnow Use the 3DNow! instruction set
3dnowext Use the Enhanced 3DNow! instruction set
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)
aim Enable AIM IM protocol support
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
apm Add APM (Advanced Power Management) support
aqua Include support for the Mac OS X Aqua (Carbon/Cocoa) GUI
atm Enable Asynchronous Transfer Mode protocol support
audiofile Add support for libaudiofile where applicable
avahi Add avahi/Zeroconf support
avx Use the AVX instruction set
avx2 Use the AVX2 instruction set
ayatana Build in support for Ayatana notification using the libindicate or libappindicator plugin
bash-completion Enable bash-completion support
bcmath Add support for libbcmath
berkdb Add support for sys-libs/db (Berkeley DB for MySQL)
bidi Enable bidirectional language 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
bootstrap !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during original system bootstrapping [make stage2]
boundschecking Add the bounds checking patch by Haj Ten Brugge, this will DISABLE the hardened PIE+SSP patches
branding Enable Gentoo specific branding
bsf Enable support for Apache Bean Scripting Framework (dev-java/bsf)
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
cdparanoia Enable cdparanoia (audio CD ripper) support
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)
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
cscope Enable cscope interface -- in vim for example
css Enable reading of encrypted DVDs
ctype Enable ctype functions
cups Add support for CUPS (Common Unix Printing System)
curl Add support for client-side URL transfer library
curlwrappers Add support for using curl in streams
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 http://www.gentoo.org/proj/en/qa/backtraces.xml
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
directfb Add support for DirectFB layer (library for FB devices)
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)
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
enscript Add enscript support to colourize code stored in the repository
evo Add support for mail-client/evolution
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-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
firebird Add support for the Firebird relational database
flac Add support for FLAC: Free Lossless Audio Codec
flatfile Add dbm support for flat files
fltk Add support for the Fast Light Toolkit gui interface
fontconfig Support for configuring and customizing font access via media-libs/fontconfig
foomaticdb Add support for the foomatic printing driver database
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
frontbase Add support for the frontbase sql server
ftp Add FTP (File Transfer Protocol) support
gcj Enable building with gcj (The GNU Compiler for the Javatm Programming Language)
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
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
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 Add support for net-libs/gnutls (TLS 1.0 and SSL 3.0 support)
gphoto2 Add digital camera support
gpm Add support for sys-libs/gpm (Console-based mouse driver)
gps Add support for Global Positioning System
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)
gtkhtml Add support for gnome-extra/gtkhtml
guile Add support for the guile Scheme interpreter
gzip Compress files with Lempel-Ziv coding (LZ77)
handbook Enable handbooks generation for KDE4.
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
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
icq Enable ICQ IM protocol support
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 support for Imagemagick (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
inifile Add dbm support for .ini files
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
iwmmxt Add support for optimizations for ARM iwMMXt instructions
jabber Enable jabber IM protocol support
jack Add support for the JACK Audio Connection Kit
java Add support for Java
java6 Use Java 1.6 to build package with || ( reduced deps, 1.6 features, source/target 1.6 )
javascript Enable javascript support
jbig Enable jbig-kit support for tiff, Hylafax, ImageMagick, etc
jingle Enable voice calls for jabber
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 KDE (K Desktop Environment)
kerberos Add kerberos support
kolab Add support for the Kolab groupware server
kontact Enable support for the KDE personal information manager (kde-base/kdepim*)
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
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
lzma Support for LZMA (de)compression algorithm
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)
maildir Add support for maildir (~/.maildir) style mail spools
matroska Add support for the matroska container format (extensions .mkv, .mka and .mks)
matrox Add Matrox MGA support to mplayer
mbox Add support for mbox (/var/spool/mail) style mail spools
memlimit Add memory usage limiting in supporting programs
mhash Add support for the mhash library
migemo Enable migemo support for Japanese
mikmod Add libmikmod support to allow playing of SoundTracker-style music files
milter Add sendmail mail filter (milter) support
mime Add MIME 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
mmx Use the MMX instruction set
mmxext Use the Extended MMX instruction set (intersection of Enhanced 3DNow! and SSE instruction sets) (3dnowext or sse in cpuinfo)
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
mozilla Add support for the Mozilla web-browser
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
msn Enable MSN Messenger IM protocol support
mssql Add support for Microsoft SQL Server database
mtp Enable support for Media Transfer Protocol
mule Add multi-language support to XEmacs
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
netboot Enable network booting
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
nptl Enable support for Native POSIX Threads Library, the new threading module (requires linux-2.6 or better usually)
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)
old-linux Add support for linux-2.4 and older
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"
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
oscar Enable Oscar (AIM/ICQ) IM protocol support
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
pcntl Add support for process creation functions
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
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
prelude Add support/bindings for the Prelude Intrusion Detection System
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
qt4 Add support for the Qt GUI/Application Toolkit version 4.x
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
rdesktop Add support for the remote desktop protocol, usually used to connect to Windows servers
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)
sdl Add support for Simple Direct Layer (media library)
seamonkey Add support for the Seamonkey web-browser
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
sharedmem Add support for shared memory use
shorten Add support for the shorten audio compressor
simplexml Support for SimpleXML
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
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
sqlite Add support for sqlite - embedded sql database
sqlite3 Add support for sqlite3 - embedded sql database
sse Use the SSE instruction set
sse2 Use the SSE2 instruction set
sse3 Use the SSE3 instruction set (pni in cpuinfo)
ssse3 Use the SSSE3 instruction set
sse4_1 Use the SSE4.1 instruction set
ssl Add support for Secure Socket Layer connections
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)
sybase Add support for the Sybase SQL Database Server
sybase-ct Add support for Sybase-CT
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
sysvipc Support for System V-compatible inter-process communication
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
test Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
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
tokenizer Add support for the PHP file parser
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
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)
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
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
wayland Enable dev-libs/wayland backend
wavpack Add support for wavpack audio compression tools
wddx Add support for Web Distributed Data eXchange
webkit Add support for the WebKit HTML rendering/layout engine
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 the xinerama X11 extension, which is mandatory if you work in multiple monitors setup
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
xsl Check/Support flag for XSL library (version 1)
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
yahoo Enable Yahoo Messenger IM protocol support
yaz Add in optional support for the Z39.50 Protocol for Information Retrieval (YAZ)
zeroconf Support for DNS Service Discovery (DNS-SD)
zlib Add support for zlib (de)compression
zsh-completion Enable zsh completion support

2.  Local Use Flags

Categories

app-accessibility app-admin app-antivirus app-arch app-backup app-benchmarks
app-cdr app-crypt app-dicts app-doc app-editors app-emacs
app-emulation app-forensics app-i18n app-laptop app-leechcraft app-misc
app-mobilephone app-office app-pda app-portage app-shells app-text
app-vim dev-cpp dev-db dev-embedded dev-games dev-haskell
dev-java dev-lang dev-libs dev-lisp dev-lua dev-ml
dev-perl dev-php dev-python dev-qt dev-ruby dev-scheme
dev-tcltk dev-tex dev-util dev-vcs games-action games-arcade
games-board games-emulation games-engines games-fps games-kids games-misc
games-mud games-puzzle games-roguelike games-rpg games-simulation games-sports
games-strategy games-util gnome-base gnome-extra gnustep-apps gnustep-base
gpe-base kde-base kde-misc lxde-base lxqt-base mail-client
mail-filter mail-mta mate-base mate-extra media-fonts media-gfx
media-libs media-plugins media-radio media-sound media-tv media-video
net-analyzer net-dialup net-dns net-firewall net-fs net-ftp
net-im net-irc net-libs net-mail net-misc net-nds
net-news net-nntp net-p2p net-print net-proxy net-voip
net-wireless razorqt-base rox-base rox-extra sci-astronomy sci-biology
sci-calculators sci-chemistry sci-electronics sci-geosciences sci-libs sci-mathematics
sci-misc sci-physics sci-visualization sec-policy sys-apps sys-auth
sys-block sys-boot sys-cluster sys-devel sys-firmware sys-freebsd
sys-fs sys-infiniband sys-kernel sys-libs sys-power sys-process
virtual www-apache www-apps www-client www-misc www-plugins
www-servers x11-apps x11-base x11-drivers x11-libs x11-misc
x11-plugins x11-terms x11-themes x11-wm xfce-base xfce-extra

app-accessibility

Package Flag Description
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
learn-mode support for interactive command learn mode
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
festival-it mbrola Adds support for mbrola voices
freetts jsapi build Java Speech API (JSAPI)
mbrola Adds support for mbrola voices
gnome-speech espeak Adds support for the espeak speech driver (default)
festival Adds support for the festival speech driver
simon kdepim Use kde-base/kdepimlibs
opencv Use media-libs/opencv
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
speechd-el brltty brltty support

app-admin

Package Flag Description
bcfg2 cheetah Include dev-python/cheetah support
genshi Include dev-python/genshi support
server Installs scripts to be used on the server-side of this app
collectd collectd_plugins_aggregation Build the aggregation plugin (aggregate multiplte values into a single value)
collectd_plugins_apache Build the apache input plugin (transferred bytes, handled requests, detailed scoreboard statistics)
collectd_plugins_apcups Build the apcups input plugin (UPS charge, load, input/output/battery voltage, etc.)
collectd_plugins_ascent Build the ascent input plugin (statistics about a free server for World of Warcraft)
collectd_plugins_battery Build the battery input plugin (charge, current and voltage of ACPI and PMU based laptop batteries)
collectd_plugins_bind Build the bind input plugin (name server and resolver statistics)
collectd_plugins_cgroups Build the cgroups CPU accounting collection plugin
collectd_plugins_conntrack Build the conntrack input plugin (number of nf_conntrack entries)
collectd_plugins_contextswitch Build the contextswitch input plugin (number of context switches done by the operating system)
collectd_plugins_cpu Build the cpu input plugin (time spent in the system, user, nice, idle, and related states)
collectd_plugins_cpufreq Build the cpufreq input plugin (CPU frequency, for laptops with speedstep or similar)
collectd_plugins_csv Build the csv output plugin (write to comma separated values (CSV) files)
collectd_plugins_curl Build the curl input plugin (parse statistics from websites using regular expressions)
collectd_plugins_curl_json Build the curl_json input plugin (get json data via curl and parse it)
collectd_plugins_curl_xml Build the curl_xml input plugin (get xml data via curl and parse it)
collectd_plugins_dbi Build the dbi input plugin (execute SQL statements on databases and interpret the reply)
collectd_plugins_df Build the df input plugin (mountpoint usage)
collectd_plugins_disk Build the disk input plugin (sectors read/written, number of read/write actions, average completion time of IO-operations)
collectd_plugins_dns Build the dns input plugin (collects statistics of your DNS traffic on port udp/53)
collectd_plugins_email Build the email input plugin (opens a UNIX domain socket and starts accepting connections on that socket)
collectd_plugins_entropy Build the entropy input plugin (available entropy on a system)
collectd_plugins_ethstat Build the ethstat input plugin (performance statistics of Linux ethernet cards)
collectd_plugins_exec Build the exec input/output plugin (executes scripts / applications and reads values back)
collectd_plugins_filecount Build the filecount input plugin (countd the number of files in a directory and all its subdirectories)
collectd_plugins_fscache Build the fscache input plugin (information about the caching infrastructure for network file-systems etc)
collectd_plugins_gmond Build the gmond input plugin (receive data from gmond, the client daemon of the Ganglia project)
collectd_plugins_hddtemp Build the hddtemp input plugin (temperature of hard disks)
collectd_plugins_interface Build the interface input plugin (information about traffic, packets and errors of interfaces)
collectd_plugins_ipmi Build the ipmi input plugin (read hardware sensors from servers using the Intelligent Platform Management Interface (IPMI))
collectd_plugins_iptables Build the iptables input plugin (statistics from a ip_tables based packet filter)
collectd_plugins_irq Build the irq input plugin (number of times each interrupt has been handled by the os)
collectd_plugins_java Build the java input plugin (embeds a JVM into collectd for writing plugins)
collectd_plugins_libvirt Build the libvirt input plugin (statistics about virtualized guests on a system)
collectd_plugins_load Build the load input plugin (system load)
collectd_plugins_logfile Build the logfile output plugin (writes log messages to a text file)
collectd_plugins_lvm Build the LVM input plugin
collectd_plugins_madwifi Build the madwifi input plugin (information about Atheros wireless LAN chipsets)
collectd_plugins_match_empty_counter Build the match_empty_counter filter plugin
collectd_plugins_match_hashed Build the match_hashed filter plugin
collectd_plugins_match_regex Build the match_regex filter plugin
collectd_plugins_match_timediff Build the match_timediff filter plugin
collectd_plugins_match_value Build the match_value filter plugin
collectd_plugins_mbmon Build the mbmon input plugin (information from mainboard sensors)
collectd_plugins_md Build the md input plugin (disk states in Linux md devices)
collectd_plugins_memcachec Build the memcachec input plugin (connects to a memcached server)
collectd_plugins_memcached Build the memcached input plugin (connects to a memcached daemon)
collectd_plugins_memory Build the memory input plugin (physical memory utilization)
collectd_plugins_multimeter Build the multimeter input plugin (reads a voltage or current from a multimeter connected to a serial bus)
collectd_plugins_mysql Build the mysql input plugin (connects to an MySQL-database and issues a SHOW STATUS command)
collectd_plugins_netlink Build the netlink input plugin (opens a netlink socket to the Linux kernel for getting statistics)
collectd_plugins_network Build the network input/output plugin (communicates with other instances of collectd)
collectd_plugins_nfs Build the nfs input plugin (usage of the Network File System)
collectd_plugins_nginx Build the nginx input plugin (number of requests handled by the nginx daemon)
collectd_plugins_notify_desktop Build the notify_desktop output plugin (uses libnotify to display notifications to the user)
collectd_plugins_notify_email Build the notify_email output plugin (uses libESMTP to send notifications to a configured email address)
collectd_plugins_ntpd Build the ntpd input plugin (queries an NTP server)
collectd_plugins_numa Build the numa input plugin (statistics of the Linux Non-Uniform Memory Access (NUMA) subsystem)
collectd_plugins_nut Build the nut input plugin (collects UPS statistics using the Network UPS Tools)
collectd_plugins_olsrd Build the olsrd input plugin (reads information about the Optimized Link State Routing daemon)
collectd_plugins_onewire Build the onewire input plugin (collects temperature information from sensors)
collectd_plugins_openvpn Build the openvpn input plugin (reads the status file printed by OpenVPN)
collectd_plugins_oracle Build the oracle input plugin (SQL-queries one or more Oracle database systems)
collectd_plugins_perl Build the perl language binding plugin (embeds a Perl interpreter into collectd for writing plugins)
collectd_plugins_ping Build the ping input plugin (measures network latency)
collectd_plugins_postgresql Build the postgresql input plugin (connects to and executes SQL statements on a PostgreSQL database)
collectd_plugins_powerdns Build the powerdns input plugin (connects to a local PowerDNS instance)
collectd_plugins_processes Build the processes input plugin (statistics about processes)
collectd_plugins_protocols Build the protocols input plugin (network protocols)
collectd_plugins_python Build the python language binding plugin (embeds a Python interpreter into collectd for writing plugins)
collectd_plugins_routeros Build the routeros input plugin (collect information on devices running RouterOS)
collectd_plugins_rrdcached Build the rrdcached input/output plugin (connects to rrdcached and submits updates for RRD files)
collectd_plugins_rrdtool Build the rrdtool output plugin (writes values to RRD-files)
collectd_plugins_sensors Build the sensors input plugin (uses lm-sensors to read hardware sensors)
collectd_plugins_serial Build the serial input plugin (collects the traffic on serial interfaces)
collectd_plugins_snmp Build the snmp input plugin (read values from network devices using SNMP)
collectd_plugins_statsd Build the statsd input plugin (accepts statsd-type metrics from a UDP socket)
collectd_plugins_swap Build the swap input plugin (amount of memory currently written to swap)
collectd_plugins_syslog Build the syslog output plugin (receives messages from collectd and dispatches them to syslog)
collectd_plugins_table Build the table input plugin (parses table-like structured plain text)
collectd_plugins_tail Build the tail input plugin (follows logfiles as e.g. tail -f)
collectd_plugins_target_notification Build the target_notification filter plugin
collectd_plugins_target_replace Build the target_replace filter plugin
collectd_plugins_target_scale Build the target_scale filter plugin
collectd_plugins_target_set Build the target_set filter plugin
collectd_plugins_tcpconns Build the tcpconns input plugin (number of TCP connections to or from a specified port)
collectd_plugins_teamspeak2 Build the teamspeak2 input plugin (collects traffic statistics from a teamspeak2 instance)
collectd_plugins_ted Build the ted input plugin (connects to The Energy Detective and reads the current power over connected power lines)
collectd_plugins_thermal Build the thermal input plugin (ACPI thermal zone information)
collectd_plugins_threshold Build the threshold plugin (checks values against configured thresholds and creates notifications if values are out of bounds)
collectd_plugins_tokyotyrant Build the tokyotyrant input plugin (number of records and file size from a running Tokyo Tyrant server)
collectd_plugins_unixsock Build the unixsock output plugin (opens a UNIX domain socket and accepts connections)
collectd_plugins_uptime Build the uptime input plugin (system uptime)
collectd_plugins_users Build the users input plugin (number of users currently logged in)
collectd_plugins_uuid Build the uuid plugin (tries hard to determine the UUID of the system it is running on)
collectd_plugins_varnish Build the varnish input plugin
collectd_plugins_vmem Build the vmem input plugin (information about the virtual memory subsystem)
collectd_plugins_vserver Build the vserver input plugin (virtual servers running on a system)
collectd_plugins_wireless Build the wireless input plugin (signal quality, signal power and signal-to-noise ratio for wireless LAN cards)
collectd_plugins_write_graphite Build the write_graphite output plugin (sends the values collected by collectd to Carbon, the storage layer of the Graphite time-series database)
collectd_plugins_write_http Build the write_http output plugin (sends the values collected by collectd to a web-server)
collectd_plugins_write_mongodb Build the write_mongodb output plugin (sends the values collected by collectd to a MongoDB)
contrib Install user-contributed files in the doc directory
conky apcupsd enable support for sys-power/apcupsd
audacious enable monitoring of music played by media-sound/audacious
eve enable support for the eve-online skill monitor
iostats enable support for per-task I/O statistics
lua enable if you want Lua scripting support
lua-cairo enable if you want Lua Cairo bindings for Conky (also enables lua support)
lua-imlib enable if you want Lua Imlib2 bindings for Conky (also enables lua and imlib support)
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 media-video/nvidia-settings
portmon enable support for tcp (ip4) port monitoring
thinkpad enable support for IBM/Lenovo notebooks
weather-metar enable support for metar weather service
weather-xoap enable support for metar and xoap weather service
xmms2 enable monitoring of music played by media-sound/xmms2
diradm automount Support for automount data in LDAP
irixpasswd Support for storing separate IRIX passwords
elektra gcov Enable coverage support
simpleini Enable simpleini support
yajl Enable yajl support
eselect-php fpm Enable the FastCGI Process Manager SAPI
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
gnome-system-tools nfs Adds support for NFS shares
hddtemp network-cron Monthly cronjob to update hddtemp.db.
keepass aot Generate native code at build time, rather than runtime.
logrotate acl Installs acl support
selinux Installs Security Enhanced Linux support
mate-system-tools caja Adds support for the Caja file manager
nfs Adds support for NFS shares
matter entropy Add Entropy support
mcollective client Install client utilities
openrc-settingsd systemd Use the versions of dbus and polkit files provided by sys-apps/systemd
packagekit-base command-not-found Enable packagekit support on shell "command not found"
cron Install cron script for auto-update
entropy Enable Entropy backend
introspection Use dev-libs/gobject-introspection Enable introspection
pm-utils Add pm-utils (suspend/resume) functionalities
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.
puppet augeas Enable augeas support
diff Enable diff support
rrdtool Enable rrdtool support
shadow Enable shadow support
rsyslog dbi Build the general database output module (requires dev-db/libdbi)
elasticsearch Build the Elasticsearch output module (requires net-misc/curl)
extras Add support for the UDP spoofing module (omudpspoof) using net-libs/libnet
gcrypt Add support for encrypted log files using dev-libs/libgcrypt
kerberos Build the GSSAPI input and output module (requires virtual/krb5)
mongodb Build the MongoDB output module (requires dev-libs/libmongo-client)
mysql Build the MySQL databse output module (requires virtual/mysql)
normalize Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm)
omudpspoof Build the udpspoof output module (requires net-libs/libnet)
oracle Build the Oracle database output module (requires dev-db/oracle-instantclient-basic)
postgres Build the PostgreSQL database output module (requires dev-db/postgresql-base)
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)
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
zeromq Build the ZeroMQ input and output modules (requires net-libs/zeromq)
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 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.
openssl Add support for using TLS via OpenSSL.
redis Support returning data to a redis database.
timelib Use timelib to parse english textual date descriptions.
sshguard ipfilter Enable ipfilter firewall support (only for *bsd)
sudo offensive Let sudo print insults when the user types the wrong password.
sendmail Allow sudo to send emails with sendmail.
sysklogd logrotate use app-admin/logrotate for rotating logs rather than custom cron scripts
syslog-ng amqp Enable support for AMQP destinations
json Enable support for JSON template formatting via dev-libs/json-glib
mongodb Enable support for mongodb destinations
pacct Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only)
smtp Enable support for SMTP destinations
spoof-source Enable support for spoofed source addresses
sysstat cron Install /etc/cron.d script to periodically run sar
isag Install isag, the Interactive System Activity Graph tool
testdisk 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.
mysql Build MySQL output plugin to save packets in a mysql database.
nfacct Build NFACCT input plugin to support traffic accounting via nfnetlink_acct.
nfct Build NFCT input plugin to support stateful flow-based via nf_conntrack_netlink.
nflog Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_queue.
pcap Build PCAP output plugin to save packets in libpcap file format.
postgres Build PGSQL output plugin to save packets in a postgres database.
sqlite Build SQLITE3 output plugin to save packets in a sqlite database.
webalizer xtended Include the 404 extension
webapp-config portage Propagete python_targets dependencies to sys-apps/portage
yaala storable Support for persistence of Perl data structures.

app-antivirus

Package Flag Description
clamav clamdtop A Top like tool which shows what clamd is currently scanning amongst other things

app-arch

Package Flag Description
cabextract extra-tools Install experimental 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.
cfv bittorrent Enable support for checking .torrent files
dpkg dselect Build the dselect package-management frontend
update-alternatives Install update-alternatives
dump ermt encrypted rmt support
engrampa caja Enable engrampa to integrate with mate-base/caja by providing entries in its context menu
file-roller nautilus Enable file-roller to integrate with gnome-base/nautilus by providing entries in its context menu
packagekit Enable support for the distro-neutral package manager GUI app-admin/packagekit
gzip pic disable optimized assembly code that is not PIC friendly
innoextract c++0x Build ROOT using the C++11 standard.
libarchive 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.
libzpaq jit Enable just-in-time compilation for faster compression (requires SSE2)
mate-file-archiver caja Enable engrampa to integrate with mate-base/mate-file-manager by providing entries in its context menu
p7zip rar Enable support for non-free rar decoder
pbzip2 symlink Install symlinks which override app-arch/bzip2 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)
rpm5 augeas Add support for configuration files changing (app-admin/augeas)
keyutils Enable for the keyring ccache using keyutils.
magic Add magic file support (sys-apps/file)
nss Build support for ssl/crypto handling using dev-libs/nss
openssl Build support for ssl/crypto handling using dev-libs/openssl
pkcs11 Build token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
uuid Enable server side UUID generation (via dev-libs/ossp-uuid)
webdav-neon Include support for net-libs/neon
xar Build support for xar archives using app-arch/xar
tar minimal just install `tar`
unzip natspec Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
zip natspec Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

app-backup

Package Flag Description
amanda 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
logwatch Install support files for logwatch
bareos clientonly Only install file-daemon (client)
director Install director
logwatch Install support files for logwatch
ndmp Enable support for NDMP (Network Data Management Protocol)
scsi-crypto Enable low level SCSI crypto support
sql-pooling Enable SQL pooling support
storage-daemon Install storage daemon (bareos-sd)
boxbackup client-only Disable server support, and just build a client
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
deja-dup nautilus Build gnome-base/nautilus extension
duplicity s3 Support for backing up to the Amazon S3 system
rear udev Have ReaR start backup when attaching your USB drive.
snapper btrfs Include Btrfs support sys-fs/btrfs-progs
ext4 Include Ext4 support sys-fs/e2fsprogs
lvm Enable LVM thinprovisioned snapshots support sys-fs/lvm2
xattr Add support for getting and setting POSIX extended attributes, through sys-apps/attr.
spideroak-bin headless Build without graphic frontend
tsm hsm Installs Tivoli Storage Manager for Space Management
tsm_cit IBM Tivoli Common Inventory Technology
tsm_hw Difference snapshot support for NetApp and N-Series file servers

app-benchmarks

Package Flag Description
jmeter beanshell Enable BeanShell scripting support
ltp expect Build against the expect library for interactive testing
open-posix Build and install the POSIX testsuite
pm Build and install the power management testsuite
rt Build and install the realtime testsuite
ramspeed pic Force shared libraries to be built as PIC (this is slower)
sysbench aio Enable libaio support

app-cdr

Package Flag Description
backlite mplayer Add support for mplayer preview in addition to X11 and phonon
brasero libburn Enable dev-libs/libburn backend
nautilus Build the gnome-base/nautilus extension
packagekit Enable support for the distro-neutral package manager GUI app-admin/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.
cdrdao gcdmaster Enable building of gcdmaster application
cdrkit hfs Provide building of HFS (Apple) CD-images
cuetools extras Install additional script that tag files based on cue/toc file information
disc-cover cdrom Enable audio CD support. This is not needed to make www-apps/disc-cover work.
gaffitter scripts Install additional gaffitter scripts for external programs
k3b emovix Enable burning support for eMoviX images
mirage2iso pinentry Support app-crypt/pinentry password input backend.
mybashburn normalize Add support for normalizing audio file volume levels

app-crypt

Package Flag Description
ccid twinserial Enable twinserial reader
codecrypt cryptopp Build algorithms that need Crypto++ support dev-libs/crypto++
eid-mw gtk Enable the dialog pages, by using x11-libs/gtk+:2
xpi Build and install an extension for Mozilla browsers.
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 mta Build mta support using virtual/mta.
smartcard Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd.
usb Build direct CCID access for scdaemon; requires dev-libs/libusb.
gpgme common-lisp Install common-lisp files
pth Enable support for GNU Portable Threads multithreading library
hashcat-gui cuda Install oclhashcat-{plus,lite}-bin to take advantage of hardware cuda support.
opencl Install oclhashcat-{plus,lite}-bin to take advantage of hardware opencl support.
heimdal hdb-ldap Adds support for LDAP as a database backend
otp Adds support for one-time passwords
pkinit Adds support for PKINIT for the initial ticket
johntheripper cuda Use nvidia cuda toolkit for speeding up cracking on capable devices
mozilla Support mozilla password cracking
opencl Enable opencl support for speeding up cracking on capable devices
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.
libsecret vala Enable bindings for dev-lang/vala
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.
openldap Enable support for ldap as a database backend.
pkinit Enable pkinit support for the initial ticket.
oclhashcat-lite-bin virtualcl Support for Mosix VirtualCL Clustering Platform
oclhashcat-plus-bin virtualcl Support for Mosix VirtualCL Clustering Platform
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
seahorse ldap Enable seahorse to manipulate GPG keys on a LDAP server.
seahorse-plugins applet Enable seahorse applet for gnome-base/gnome-panel
gedit Enable text encryption plugin to integrate into app-editors/gedit
nautilus Enable file encryption plugin to integrate into the gnome-base/nautilus context menu
shishi 3des Enable 3DES encryption/checksum type.
aes Enable AES encryption/checksum types.
arcfour Enable ARCFOUR encryption/checksum type.
des Enable DES related encryption/checksum types.
md Enable unkeyed MD4/MD5 checksum types.
null Enable dummy NULL encryption/checksum type.
tc-play openssl Use openssl crypto backend.
tpm-tools pkcs11 Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
truecrypt asm Enable assembly for optimization

app-dicts

Package Flag Description
aspell-be classic Support classic spelling by default
gwaei hunspell Enable app-text/hunspell spellchecking and morphological analysis
mecab Enable app-text/mecab support
unique Enable single instance support using dev-libs/libunique.
myspell-pt preao Use the pre ortographic agreement version of the dictionary

app-doc

Package Flag Description
csound-manual html Install HTML documentation
doxygen dot allow to create dot graphs using media-gfx/graphviz
nodot removes graphviz dependency, along with dot graphs
linuxfromscratch htmlsingle Install all-on-one-page HTML version.
pms binary Download pre-built files instead of building from sources
html Generate PMS as .html as well
root-docs api Generate html API documentation
math Downloads all math related documentation
metric Default to A4 paper size and metric measurement
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

Package Flag Description
emacs athena Enable the MIT Athena widget set (x11-libs/libXaw)
games Support shared score files for games
gconf Use gnome-base/gconf to read the system font name
gsettings Use gsettings (dev-libs/glib) to read the system font name
gtk3 Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
gzip-el Compress bundled Emacs Lisp source
hesiod Enable support for net-dns/hesiod
imagemagick Use media-gfx/imagemagick for image processing
libxml2 Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
pax_kernel Enable building under a PaX enabled kernel (sys-apps/paxctl)
source Install C source files and make them available for find-function
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.
emacs-vcs athena Enable the MIT Athena widget set (x11-libs/libXaw)
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
gtk3 Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
gzip-el Compress bundled Emacs Lisp source
hesiod Enable support for net-dns/hesiod
imagemagick Use media-gfx/imagemagick for image processing
libxml2 Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
pax_kernel Enable building under a PaX enabled kernel (sys-apps/paxctl)
source Install C source files and make them available for find-function
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.
fe sendmail Send mail after editor abend
gedit zeitgeist Build the plugin to inject events to gnome-extra/zeitgeist
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
gvim luajit Use dev-lang/luajit instead of dev-lang/lua
netbeans Include netbeans external editor integration support
racket Enable support for Scheme using dev-lang/racket
jasspa-microemacs nanoemacs Build NanoEmacs instead of MicroEmacs
joe xterm Enable full xterm clipboard support
latexila latexmk Install dev-tex/latexmk (used by default for the build tools)
rubber Install dev-tex/rubber (can be used for the build tools)
leafpad emacs Enable Emacs key theme
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).
tea aspell Enable spellchecking using app-text/aspell
hunspell Enable spellchecking using app-text/hunspell
vim X Link console vim against X11 libraries to enable title and clipboard features in xterm
luajit Use dev-lang/luajit instead of dev-lang/lua
racket Enable support for Scheme using dev-lang/racket
vim-pager Install vimpager and vimmanpager links
vim-qt luajit Use dev-lang/luajit instead of dev-lang/lua
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
pop Support POP for mail retrieval
xim Enable X11 XiM input method
xmlcopyeditor guidexml Install GuideXML templates to work with Gentoo official docs
zile valgrind Enable usage of dev-util/valgrind in tests

app-emacs

Package Flag Description
anything extensions Install optional extensions
auctex preview-latex Use bundled preview-latex
bbdb tex Install plain TeX support files
calfw howm Add support for the app-emacs/howm note-taking tool
company-mode ropemacs Install backend for dev-python/ropemacs
emacs-common-gentoo games Support shared score files for games
emhacks jde Enable support for Java Development Environment
magit contrib Install user-contributed files
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

Package Flag Description
aranym fullmmu Enable full 68040 MMU emulation
lilo Enable Linux-m68k loader
usbhost Enable NatFeat USB
bochs avx Enable support for 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
crossover-bin capi Enable ISDN support via CAPI
docker aufs Enables dependencies for the "aufs" graph driver, including necessary kernel flags.
btrfs Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.
contrib Install additional contrib scripts and components.
device-mapper Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.
lxc Enables dependencies for the "lxc" execution driver.
dosemu fluidsynth use media-sound/fluidsynth for MIDI emulation
e-uae capslib Add CAPS library support
sdl-sound Use media-libs/sdl-sound for audio output
emul-linux-x86-baselibs development Install pkgconfig files
emul-linux-x86-compat development Install pkgconfig files
emul-linux-x86-cpplibs development Install pkgconfig files
emul-linux-x86-db development Install pkgconfig files
emul-linux-x86-gstplugins development Install pkgconfig files
emul-linux-x86-gtklibs development Install pkgconfig files
emul-linux-x86-gtkmmlibs development Install pkgconfig files
emul-linux-x86-java pax_kernel Use paxctl to mark the JVM binaries.
emul-linux-x86-jna development Install pkgconfig files
emul-linux-x86-medialibs development Install pkgconfig files
emul-linux-x86-motif development Install pkgconfig files
emul-linux-x86-opengl development Install pkgconfig files
emul-linux-x86-qtlibs development Install pkgconfig files
gtkstyle Build a Qt style called GTK+ that mimics the active GTK+ theme
emul-linux-x86-sdl development Install pkgconfig files
emul-linux-x86-soundlibs development Install pkgconfig files
pulseaudio Pull in pulseaudio if using USE=abi_x86_32
emul-linux-x86-xlibs development Install pkgconfig files
free42 alsa Adds support for Advanced Linux Sound Architecture
fuse-utils gcrypt Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
ganeti drbd Enable DRBD support
filestorage Enable File Storage
haskell-daemons Build haskell daemons instead of python
htools Enable htools support
kvm Enable KVM support
lxc Enable Linux Countainers support
rbd Enable rados block device support via sys-cluster/ceph
sharedstorage Enable Shared Storage support
xen Enable Xen support
libguestfs erlang Build Erlang bindings
fuse Enable image mount support via fuse
inspect-icons Use media-gfx/icoutilsfor acces icon file in image and inspect it
introspection Use dev-libs/gobject-introspection for introspection
systemtap Use dev-util/systemtap to inspect VM via "probes" way
libspectrum gcrypt Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
libvirt audit support sys-process/audit
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
iscsi Allow using an iSCSI remote storage server as pool for disk image storage
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-apps/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. It has its advantages and disadvantages. macvtap support requires very new kernels and is currently evolving. Support for this is experimental at best.
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 (see sys-kernel/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
phyp Support IBM HMC / IVM hypervisor via PHYP protocol
qemu Support management of QEMU virtualisation (app-emulation/qemu)
rbd Enable rados block device support via sys-cluster/ceph
uml Support management of User Mode Linux virtualisation
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 (one of app-emulation/virtualbox or app-emulation/virtualbox-ose)
xen Support management of Xen virtualisation (app-emulation/xen)
libvirt-glib introspection Use dev-libs/gobject-introspection for introspection
vala Enable bindings for dev-lang/vala
lxc seccomp Use seccomp syscall filters using sys-libs/libseccomp
vanilla Avoid adding Gentoo Linux-specific modifications, which include the custom init script. This is present as a flag to avoid forcing dependencies over users that might not want have them around as they use LXC in contexts where the init script is not useful.
open-vm-tools doc Generate API documentation
fuse Build vmblock-fuse in favor of FUSE based blocking mechanism for DnD
pic Force shared libraries to be built as PIC
playonlinux winbind Enables support for the winbind auth daemon
q4wine gnome Use the gksu sudo GUI for managing the devices
icoutils Enable icoutils support
kde Use the kdesu sudo GUI for managing the devices
wineappdb Enable Win AppDB browser subsystem
qemu accessibility Adds support for braille displays using brltty
aio Enables support for Linux's Async IO
alsa Enable alsa output for sound emulation
curl Support ISOs / -cdrom directives vis HTTP or HTTPS.
fdt Enables firmware device tree support
glusterfs Enables GlusterFS cluster fileystem via sys-cluster/glusterfs
iscsi Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.
jpeg Enable jpeg image support for the VNC console server
mixemu Enable audio mixer emulation. On Fedora, known to cause performance problems when using SDL output and ALSA. For OSS, locks the sound device from other applications.
ncurses Enable the ncurses-based console
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
seccomp Utilize sys-libs/libseccomp to enable kernel filtering of system calls to prevent malicious guests from doing damage.
spice Enable Spice protocol support via app-emulation/spice
ssh Enable SSH based block device support via net-libs/libssh2
static Enables both 'static-softmmu' and 'static-user'
static-softmmu Builds the Software MMU (system) targets as static binaries
static-user Build the User targets as static binaries
systemtap Enable SystemTAP/DTrace tracing
tci Enable the TCG Interpreter which can speed up or slowdown workloads depending on the host and guest CPUs being emulated. In the future it will be a runtime option but for now its compile time.
tls Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support.
usb Enable USB passthrough via dev-libs/libusb
usbredir Use sys-apps/usbredir to redirect USB devices to another machine over TCP
uuid Enable UUID support in the vdi block driver
vde Enable VDE-based networking
vhost-net Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet
virtfs Enable VirtFS via virtio-9p-pci / fsdev. See http://wiki.qemu.org/Documentation/9psetup
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.
spice client Build the spicec client app (does not reduce dependencies at the moment).
gui Build some GUI components (inside the guest window).
smartcard Enable smartcard remoting using app-emulation/libcacard
spice-vdagent consolekit Use sys-auth/consolekit to determine the master vdagentd in case of multiple running vdagentds (highly recommended)
uae scsi Enable the uaescsi.device
vice ethernet Enable ethernet emulation
memmap Enable extra monitor features
xrandr Enable support for the X xrandr extension
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).
spice Support connecting to SPICE-enabled virtual machines.
vnc Support connecting to VNC-enabled virtual machines.
virt-viewer 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 additions Install Guest System Tools ISO
extensions Install extension module packages
headless Build without any graphic frontend
sdk Enable building of SDK
vboxwebsrv Build and install the VirtualBox webservice
virtualbox-bin additions Install Guest System Tools ISO
chm Install kchmviewer binary to enable online help (in MS CHM format)
headless Install without any graphic frontend
rdesktop-vrdp Install the rdesktop client integration
sdk Enable building of SDK
vboxwebsrv Install the VirtualBox webservice
virtualbox-modules pax_kernel Apply patch needed for pax enabled kernels
vmware-modules pax_kernel Apply patch needed for pax enabled kernels
vmci Build the Virtual Machine Communication Interface module; disable this if you want to use the module from the mainline kernel
vsock Build the VMware VMCI transport for Virtual Sockets; disable this if you want to use the module from the mainline kernel
vmware-player vmware-tools Install VMware Tools images
vmware-workstation ovftool Install OVF tool.
server Install VMware Workstation Server component.
vix Install VIX. The VIX API allows you to write programs and scripts that automate virtual machine operations, and run programs or manipulate files within guest operating systems.
vmware-tools Install VMware Tools images
vov gprof build with profiling support
wine 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
gecko Add support for the Gecko engine when using iexplore
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
perl Install helpers written in perl (winedump/winemaker)
pipelight Apply unofficial Compholio patches for Pipelight/Silverlight support; use at your own peril
prelink Run prelink on DLLs during build -- 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 http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
win32 Build a 32bit version of Wine (won't run Win64 binaries)
win64 Build a 64bit version of Wine (won't run Win32 binaries)
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
pae Enable support for PAE kernels (usually x86-32 with >4GB memory)
xsm Enable the Xen Security Modules (XSM)
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)
ocaml Enable support for the ocaml language
pam Enable pam support
pygrub Install the pygrub boot loader
qemu Enable IOEMU support via the use of qemu-dm
screen Enable support for running domain U console in an app-misc/screen session
system-qemu Using app-emulation/qemu instead of the bundled one
system-seabios Using sys-firmware/seabios instead of the bundled one
xend Enable support the xend and xm to manage xen
xtrs ls-dos Install LS-DOS disk images for Model 4P

app-forensics

Package Flag Description
afflib fuse Enable extra fuse thingies
qemu Enable qemu stuff
s3 Enable support for Amazon S3
aide audit Enable support for sys-process/audit
prelink Enable support for sys-devel/prelink
chkrootkit cron Install cron script for weekly rootkit scans
libewf bfio Enables libbfio for chaining file in file handling
ewf Enables the v1 API
fuse Enable fuse support for ewfmount
rawio Enables raw IO handling
uuid Enable UUID support in the ewftools
openscap gconf Build the gconf independant probes
nss Prefer NSS over libgcrypt as the crypto engine
rpm Compiles the RPM probes
sce Enables Script Check Engine (SCE) support
sql Build the sql independant probes
ovaldi rpm Enable the RPM probes
sleuthkit aff Enable extra aff formats
ewf Enable libewf support

app-i18n

Package Flag Description
anthy canna-2ch Enable support for app-dicts/canna-2ch
fcitx autostart Enable xdg-compatible autostart of fcitx
enchant Use app-text/enchant for text prediction
gtk Install GTK2 IM module
gtk3 Install GTK3 IM module
introspection Enable GObject Introspection
opencc Enable OpenCC for Chinese Transform
pango Enable support for x11-libs/pango
qt4 Install Qt4 IM module
snooper Enable Key Snooper for GTK app
table Enable Table IM
fcitx-configtool gtk3 Use GTK+3 instead of 2
ibus dconf Enable support for gnome-base/dconf
deprecated install the deprecated ibus python library
gconf Enable support for gnome-base/gconf
gtk3 Enable support for gtk+3
introspection Use dev-libs/gobject-introspection for introspection
vala Enable support for dev-lang/vala
ibus-anthy deprecated Install deprecated pygtk2 library
ibus-handwrite zinnia Build with app-i18n/zinnia engine.
ibus-m17n gtk Build the preference interfaces, based on x11-libs/gtk+ (GTK+ 2).
ibus-pinyin boost Compile against dev-libs/boost libraries
opencc Enable support for app-i18n/opencc
ibus-unikey gtk3 Enable support for gtk+3
im-ja anthy Support for Anthy input method
skk Support for SKK input method
imsettings gconf Enable GConf support
gtk3 Enable support for x11-libs/gtk+:3
xfconf Enable integration in the Xfce desktop environment with xfce-base/xfconf
kimera anthy Support for Anthy input method
libskk introspection Use dev-libs/gobject-introspection for introspection
libtomoe-gtk gucharmap Enable gucharmap dictionary plugin
mozc ibus Enable support for app-i18n/ibus
renderer Enable native candidate window.
scim Enable support for app-i18n/scim
pyzy boost Enable support for dev-libs/boost
doc Enable support for documents
opencc Use app-i18n/opencc for input
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-tomoe gucharmap Enable gucharmap dictionary plugin
tomoe hyperestraier Enable support for app-text/hyperestraier
uim anthy Enable support for app-i18n/anthy input method
eb Enable support for dev-libs/eb
gtk3 Enable support for x11-libs/gtk+:3
skk Enable support for app-i18n/skk-jisyo

app-laptop

Package Flag Description
ibam gkrellm Enable building of app-admin/gkrellm module
laptop-mode-tools scsi Adds dependency on sdparm to control non-SATA SCSI drivers
pbbuttonsd ibam Enable support for Intelligent Battery Monitoring
macbook Enable support for the Macbook and Macbook Pro
prey alarm Module for playing an audio file
alert Display a warning message when the computer seems to be stolen"
geo Module for retrieving the physical location of the stolen computer
lock Lock stolen computer
network Get network information (active connections, traceroute) from stolen computer
secure Delete or hide sensitive user data
session Get screenshots from user session
userpriv Create a prey user group so regular users can access and modify the prey configuration. Use it with caution
webcam Use computer's webcam to take screenshots of the thief
thinkfan atasmart include libatasmart support to get disc temperature
tp_smapi hdaps Install a compatible HDAPS module

app-leechcraft

Package Flag Description
lc-aggregator webaccess Enables web interface submodule for Aggregator
lc-azoth acetamide Build Acetamide, the IRC protocol support
adiumstyles Build support for Adium styles
astrality Build Astrality, support for protocols provided by Telepathy
autoidler Build support for automatic status changing according to user idle time
autopaste Build Autopaste for pasting long texts to pastebins
birthdaynotifier Build Birthday Notifier for you to not forget about birthdays of your contacts.
chathistory Build ChatHistory which stories chat history
depester Build Depester which enables to ignore MUC participants
embedmedia Build EmbedMedia for embedding flash videos and images directly into chat windows
herbicide Build Herbicide, a basic antispam plugin
hili Build HiLi which allows to customize highlight settings in MUCs
isterique Build Isterique plugin for neutralizing excessive caps lock usage
juick Build plugin for the Juick.com microblogging service
keeso Build plugin for changing text into SoMEtHInG lIKe THiS
lastseen Build plugin for client-side recording of the last online/available time
media Enable media calls
metacontacts Build plugin for metacontacts support
murm Build Murm, the VKontakte messaging support via their native API (instead of XMPP)
nativeemoticons Build support for native Azoth's emoticons packs
otroid Build OTRoid, plugin for the Off-the-Record deniable encryption system
p100q Build p100q, plugin for psto.net microblogging service
shx Build shell command executor plugin
standardstyles Build support for standard Azoth styles engine
vader Bulid Vader, the MRIM (Mail.Ru Agent) protocol support plugin
woodpecker Build Woodpecker, the Twitter client plugin
xtazy Build Xtazy for publishing currently playing tune
lc-blasq deathnote Support LiveJournal FotoBilder service
rappor Support VKontakte service
spegnersi Support Flickr service
vangog Support Picasa service
lc-blogique hestia Allows one to keep a local blog
metida Support for the LiveJournal blogging platform
lc-core qwt Support for QML plotting item through x11-libs/qwt
lc-gmailnotifier notify Pull in a plugin to show notifications from GMail Notiifer
quark Pull in a plugin to show GMail Notifier's quark
lc-lmp fradj Build FrAdj, the equalizer effect module
graffiti Build media tags editor plugin
guess Enable tags encoding guessing via the libguess library
mp3tunes Build plugin for supporting the mp3tunes.com music locker service
mpris Enable MPRIS support
potorchu Enable the projectM-based visualization effects module for LMP
lc-monocle fb2 Enable support for FictionBook format
mobi Enable support for MOBI format
spectre Enable PostScript backend for Monocle using the app-text/libspectre
lc-musiczombie acoustid Use media-libs/chromaprint for acoustic fingerprinting
lc-netstoremanager googledrive Support Google Drive storage backend
yandexdisk Support Yandex.Disk storage backend
lc-poshuku autosearch Provide automatic search suggestions for Poshuku.
cleanweb Build CleanWeb for ad blocking compatible with Firefox's AdBlock+.
dcac Build color inverter module providing a night mode.
fatape Build FatApe, GreaseMonkey userscripts support layer.
filescheme Build FileScheme for accessing local URLs.
fua Build FUA for faking user agents for different hosts.
keywords Build Keywords for adjusting search shortcuts.
onlinebookmarks Build OnlineBookmarks for syncing bookmarks with social bookmarking services like Read It Later.
pcre Use dev-libs/libpcre for rules matching in CleanWeb instead of slower QRegExp.
qrd Build module for displaying the QR code of a web page.
wyfv Build WYFV for replacing Flash-based video players on some sites.
leechcraft-meta de Install components, that allow using Leechcraft as Desktop Environment

app-misc

Package Flag Description
anki recording Enable support for audio recording
sound Enable support for adding sound to cards
binwalk graph Enable support for generating entropy graphs
brewtarget phonon Enable sound support via media-libs/phonon or dev-qt/qtphonon
byobu screen Use app-misc/screen as the default backend
ca-certificates cacert Include root certs from CAcert (http://http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
ddccontrol ddcpci enable direct PCI memory access (the setuid ddcpci util)
digitemp ds2490 Build support for the ds2490 sensor
ds9097 Build support for the ds9097 sensor
ds9097u Build support for the ds9097u sensor
emelfm2 ansi Add support for ANSI escape sequences
gtk3 Use x11-libs/gtk:3 instead of x11-libs/gtk:2
freemind groovy Build plugin for scripting via Groovy
latex Build plugin for inserting mathematical formulas in LaTeX syntax
pdf Build plugin for exporting mindmaps to SVG and PDF
svg Build plugin for exporting mindmaps to SVG and PDF
gcstar stats Enable statistics reporting
tellico Enable support for kde-misc/tellico files
geneweb ocamlopt Enable ocamlopt support (dev-lang/ocaml native code compiler)
geoclue geonames Install geonames.org provider
gsmloc Install GSM location provider
gtk Install gtk-based geoclue-test-gui
hostip Install hostip.info provder
manual Install manual provider
modemmanager Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager.
nominatim Install openstreetmap.org provider
plazes Install plazes.com provider
server Install geoip server
skyhook Install skyhookwireless.com provider
yahoo-geo Install Yahoo geolocation provider
gourmet gnome-print <=app-misc/gourmet-0.15.9 Enable pretty Python printing with Gnome
i18n >app-misc/gourmet-0.16 Enable support for i18n through elib.intl
ipython >app-misc/gourmet-0.16 Enable support for the interactive Python console plugin
pdf Enable export to PDF
print >app-misc/gourmet-0.16 Enable pretty Python printing
rtf <=app-misc/gourmet-0.15.9 Enable export to RTF
spell >app-misc/gourmet-0.16 Enable support for the spell check plugin
web >app-misc/gourmet-0.16 Enable support for the web import plugin
gramps reports All external software that is needed for graphical reports will be installed
webkit Use Webkit-based rendering for geographical data view.
graphlcd-base g15 Add support for app-misc/g15daemon driver (e.g. Logitech G15 Keybord)
lcd-stuff mpd Add support for display of mpd controlled music (media-libs/libmpd)
lcd4linux mpd Add support for display of mpd controlled music (media-libs/libmpd)
lcdproc ftdi Enable support for FTDI connections in some selected LCD_DEVICES (currently hd44780)
hid Enable HID support using libhid
irman Enable support for IRMan (media-libs/libirman)
lcd_devices_sdeclcd Enable support for VLSYS M428 display
lcd_devices_vlsys_m428 Enable support for VLSYS M428 display
nfs Adds support for NFS file system
seamless-hbars Try to avoid gaps in horizontal bars
lirc hardware-carrier The transmitter device generates its clock signal in hardware
transmitter Add transmitter support to some lirc-drivers (e.g. serial)
mc edit Compile and install the mcedit application
mclib Compile and install the libmc.so shared library
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
muttprint doc Builds documentation
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 Index chm files
dvi Index dvi files
ics Index iCalendar files
info Index GNU info files
inotify Use the Linux Kernel notification subsystem for monitoring file alterations in realtime
lyx Index Latex lyx files
msdoc Index Microsoft Word documents
msppt Index Microsoft PowerPoint documents
msxls Index Microsoft Excel documents
pdf Index PDF documents
rtf Index Microsoft RTF documents
session Stop monitoring file alterations when X11 session terminates
sound Index audio files
tex Index TeX files
wordperfect Index WordPerfect documents
xml Index several XML-based formats (Abiword, FictionBook, Kword, Office OpenXML, OpenDocument, SVG)
roadnav festival Enable support for app-accessibility/festival
openstreetmap Enable openstreetmap support
scripting Enable scripting support
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
sphinx id64 use 64-bit document and word IDs
stemmer Enable language stemming support
strigi clucene Enable dev-cpp/clucene backend support.
inotify Enable support for inotify.
log Enables advanced logging through dev-libs/log4cxx.
subsurface linguas_da_DK Language support for da_DK.
linguas_de_CH Language support for de_CH.
linguas_gsw Language support for gsw.
linguas_hr_HR Language support for hr_HR.
tablix pvm Add support for parallel virtual machine (sys-cluster/pvm)
tasque hiveminder Allows you to use http://www.hiveminder.com/ as your storage backend.
rememberthemilk Allows you to use http://www.rememberthemilk.com/ as your storage backend.
towitoko moneyplex Makes libtowitoko work for the moneyplex home banking software
tracker cue Enable cue sheet parsing
firefox-bookmarks Install bookmark data miner plugin for www-client/firefox and www-client/firefox-bin
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
libsecret Enable libsecret support to store login credentials
miner-fs Enable tracker-miner-fs (required for filesystem indexing)
nautilus Enable tracker to integrate with gnome-base/nautilus by providing entries in its context menu
playlist Add support for playlists
thunderbird Install email data miner plugin for mail-client/thunderbird and mail-client/thunderbird-bin
xps Add support for XPS file format through app-text/libgxps.
unfoo minimal Do not install all support archive binaries
vifm compatibility Compatibility with previous versions of vifm
developer Enable features of interest to developers
extended-keys Support for extended keys (arrows, home etc)
gtk Use gtk+ to determine mimetypes
magic Use libmagic to determine mimetypes
vim Install the vifm vim plugin and vim-compatible documentation
vim-plugin Install the vifm vim plugin
worker avfs Enable support for sys-fs/avfs
magic Add magic file support from sys-apps/file to automatically detect file types
workrave distribution Enable networking. See http://www.workrave.org/features/
zygrib maps Installs additional GSHHS maps for high resolution coastline data and cities

app-mobilephone

Package Flag Description
gammu irda Enables infrared support
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)
obexd nokia Add support for Nokia backup plugin
server Enables server installation, it's incompatible with obex-data-server provided one
smstools stats Enable statistic reporting
yaps capi Enable CAPI support

app-office

Package Flag Description
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
akonadi-server soprano Enable deprecated dev-libs/soprano, needed for nepomuk search
calligra attica Get hot stuff with dev-libs/libattica
eigen Enable dev-cpp/eigen mathematical templates support
glew Enable media-libs/glew opengl extension library support
glib Enable support for C library routines from dev-libs/glib
gsf Enable support for ODT structures extraction via gnome-extra/libgsf
import-filter Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote
kdcraw Enable support for KDE image manipulating interface via kde-base/libkdcraw
kdepim Enable support for KDEPIM resources integration
marble Enable displaying of maps using Marble
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
okular Enable bindings for kde-base/okular
opengtl Enable support for transformation algorithms via media-libs/opengtl
spacenav Enable support for the 3Dconnexion spacenav input device via dev-libs/libspnav
vc Enable support for dev-libs/vc, could be a significant speed boost on krita
word-perfect Enable support for various WordPerfect file formats
xbase Enable support for xbase compatible database formats
xslt Enable xslt and exslt support format support
glabels barcode Enable barcode support through external libraries.
gnucash chipcard Enable support for chipcard reading and processing.
hbci Enable HBCI support, for connecting to some internet banks
quotes Enable Online Stock Quote retrieval
gnumeric libgda Enable database support through gnome-extra/libgda.
perl Enable perl plugin loader.
python Enable python plugin loader.
imposter iksemel Enable external dev-libs/iksemel parsing support
kmymoney hbci Enable HBCI support using net-libs/aqbanking
quotes Enable Online Stock Quote retrieval
libreoffice gtk3 Enable highly experimental gtk3 frontend
jemalloc Use dev-libs/jemalloc for allocations
odk Build the Office Development Kit
telepathy Enable document colaboration features using telepathy communication framework.
vba Enable support for VBA compatibility and ActiveX embedding
vlc Use media-video/vlc for video embedding
webdav Adds support for HTTP content adding via net-libs/neon
libreoffice-l10n linguas_ca_valencia Catalan locale (Valencia)
linguas_kmr_Latn kmr_Latn localization
linguas_sid sid localization
linguas_sr_Latn Serbian (Latin) locale
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
scribus graphicsmagick Add support for media-gfx/graphicsmagick
hunspell Enable support for spell checking with app-text/hunspell
linguas_cs_CZ Language support for cs_CZ
linguas_da_DK Language support for da_DK
linguas_de_1901 Language support for de_1901
linguas_de_CH Language support for de_CH
linguas_en_AU Language support for en_AU
linguas_lt_LT Language support for lt_LT
linguas_pl_PL Language support for pl_PL
linguas_sa Language support for sa
linguas_sk_SK Language support for sk_SK
linguas_th_TH Language support for th_TH
minimal Don't install headers (only required for e.g. plug-in developers)
osg 3D redering via dev-games/openscenegraph
scripts Install the scripts
templates Document tamplates
tk Install tk based scripts e.g. FontSample.py
texmacs netpbm Add support for media-libs/netpbm
pdf Add the experimental native pdf export
texstudio video Use phonon for video embedding

app-pda

Package Flag Description
barry boost Enable boost support
desktop Install the GUI desktop control panel
gui Install the GUI backup tool
opensync Install the barry-sync plugin for OpenSync 0.22
gtkpod clutter Enable clutter support for displaying coverart
webkit Enable webkit support for finding coverart
libopensync-plugin-irmc irda Enable infrared support
libopensync-plugin-syncml http Enable http transports
obex Enable obex transports
libsyncml http Enable http transports
obex Enable obex transports
synce-sync-engine opensync Enable OpenSync (app-pda/libopensync) python plug-in

app-portage

Package Flag Description
conf-update colordiff Use colors when displaying diffs (app-misc/colordiff)
eix clang Use sys-devel/clang for building
debug Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.
dep Make DEP=true the default which enables support for {,R,P}DEPEND but requires roughly double disk and memory.
doc Create description of the eix cache file additionally in html format
optimization Accept upstream's choices for CXXFLAGS/LDFLAGS for optimization. Absense of this USE flag does not strip user's *FLAGS
security This adds some checks which can prevent certain exploits if e.g. the eix code has a bug. If you use the hardened toolchain, using this flag does not increase security and can even lead to problems.
sqlite Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix
strong-optimization Adds several more agressive CXXFLAGS/LDFLAGS for optimization like graphite (if available). May cause trouble with some buggy compiler versions. Absense of this USE flag does not strip user's *FLAGS
strong-security Add many checks to prevent exploits if eix code has a bug. This will slow down eix considerably. Use only if you are paranoid or have reasons to suspect a bug.
swap-remote Swap role of remote addresses in eix-remote, making the data from gpo.zugaina.org the first choice.
tools Create separate binary for script helper tools; useful if they are called extremely often
layman bazaar Support dev-vcs/bzr based overlays
cvs Support dev-vcs/cvs based overlays
darcs Support dev-vcs/darcs 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
subversion Support dev-vcs/subversion based overlays
pfl network-cron Adds a cron job which does a weekly submit of the package database
tatt templates Install template scripts to be used with tatt

app-shells

Package Flag Description
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'
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.
scsh-install-lib scsh Use a non-FHS directory layout
shish diet Use dev-libs/dietlibc
tcsh catalogs Add support for NLS catalogs

app-text

Package Flag Description
acroread html HTML support and help reading capability (only for x86).
asciidoc highlight Enable source code highlighting
atril caja Enable property page extension in mate-base/mate-file-manager
dvi Enable build-in DVI viewer
ps Enable build-in postscript viewer
t1lib Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)
xps Enable XPS viewer using app-text/libxps
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)
cuneiform graphicsmagick Enables support of various input formats using media-gfx/graphicsmagick. Otherwise only uncompressed BMP files are supported.
imagemagick Enables support of various input formats using media-gfx/imagemagick. Otherwise only uncompressed BMP files are supported.
dbacl interactive Enable the interactive mailinspect ability
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 app-text/jadetex (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-admin/eselect-ruby.
docbook-xsl-stylesheets ruby Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-admin/eselect-ruby.
dvipng t1lib Enable support for T1lib font rendering (media-libs/t1lib)
enchant aspell Adds support for app-text/aspell spell checker
hunspell Adds support for app-text/hunspell spell checker
zemberek Adds support for app-text/zemberek-server spell checker server
evince dvi Enable the built-in DVI viewer
gnome Enable the use of gnome-base/gconf to honour lockdown settings
libsecret Enable support for credentials store
nautilus Enable property page extension in gnome-base/nautilus
t1lib Enable the Type-1 fonts for the built-in DVI viewer (media-libs/t1lib)
xps Enable XPS viewer using app-text/libgxps
getxbook ocr Use app-text/tesseract for optical character recognition
ghostscript-gpl bindist Disable dejavu support for binary distribution because of licensing issue
glark zip Support for ZIP files using dev-ruby/rubyzip
gtkspell vala Enable bindings for dev-lang/vala
hyperestraier mecab Enable app-text/mecab support for Estraier
jmupdf system-mupdf Link against system version of app-text/mupdf
lcdf-typetools kpathsea Enable integration with kpathsea search library (TeX related)
libgxps introspection Use dev-libs/gobject-introspection for introspection
liblangtag introspection Use dev-libs/gobject-introspection for introspection
libwpd tools Build miscellaneous tools
lodgeit vim Install a vim plugin allowing to paste and download from within vim
mate-document-viewer caja Enable property page extension in mate-base/mate-file-manager
dvi Enable build-in DVI viewer
ps Enable build-in postscript viewer
t1lib Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)
xps Enable XPS viewer using app-text/libxps
mathtex png Generate png images by default instead of gif
mupdf openssl Use dev-libs/openssl crypto backend
pandoc embed_data_files Embed data files in binary for relocatable executable.
http-conduit Enable downloading of resources over https.
pastebinit crypt Install pbputs for gpg-encrypted pastes
pdf2djvu graphicsmagick Enable media-gfx/graphicsmagick support
pdfgrep unac Removing accents and ligatures before search
pelican markdown Markdown support
podofo boost Add support for boost
poppler introspection Enable GObject introspection.
utils Install command-line PDF converters and various utilities.
qpdfview synctex Add support for searching TeX sources
sgmltools-lite jadetex Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
stardict espeak Enable text to speech synthesizer using espeak engine
gucharmap Enable gucharmap dictionary plugin
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 the extra stardict tools
tesseract linguas_chr Enable support for the Cherokee language.
linguas_jp Enable support for Japanese.
osd Enable support orientation and script detection.
scrollview Enable graphics support (ScrollView).
webp Enable support for webp image format.
texlive context Add support for the ConTeXt format (dev-texlive/texlive-context)
detex Add support for dev-tex/detex, a filter program that removes the LaTeX (or TeX) control sequences
dvi2tty Add support for dev-tex/dvi2tty to preview dvi-files on text-only devices
dvipdfm Add support for app-text/dvipdfm to convert DVI files to PDF
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)
jadetex Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
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)
omega Add omega packages (dev-texlive/texlive-omega)
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-science)
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)
xindy Add support for app-text/xindy, a flexible indexing system
texlive-core xetex Add support for XeTeX: a TeX system with Unicode and modern font technologies.
u2ps fonts Install a more complete set of unicode fonts
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
wgetpaste lodgeit-default Set one of lodgeit-like (ex http://paste.pocoo.org) services as default
wklej vim Install the vim plugin allowing to paste through ':Wklej'.
writerperfect gsf Add support for structured files using gnome-extra/libgsf
mspub Add support to mspub format using app-text/libmspub
mwaw Add support to mwaw formats using app-text/libmwaw
visio Add support for visio format using media-libs/libvisio
wpg Add support for wpg format using app-text/libwpg
wps Add support for wps format using app-text/libwps
wv tools Install optional utilities considered deprecated in favor of using AbiWord.
xiphos webkit Use net-libs/webkit-gtk instead of gnome-extra/gtkhtml
yagf cuneiform Enable support for the app-text/cuneiform OCR engine.
tesseract Enable support for the app-text/tesseract OCR engine.
zathura magic Use libmagic to determine mimetypes
zathura-meta cb Install plug-in for ComicBook support

app-vim

Package Flag Description
gentoo-syntax ignore-glep31 Remove GLEP 31 (UTF-8 file encodings) settings
vim-latex html Install HTML documentation
python Enable python support which can help speed up some functionality
youcompleteme clang Enable semantic support for C-family languages using sys-devel/clang

dev-cpp

Package Flag Description
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.
pficommon fcgi Build FCGI feature
mprpc Build MessagePack RPC feature
xsd ace Enable support for serializing to/from an ACE CDR stream

dev-db

Package Flag Description
cppdb mysql_internal Don't build a separate mysql loadable module but rather build it into the cppdb library itself
odbc_internal Don't build a separate postgresql loadable module but rather build it into the cppdb library itself
postgres_internal Don't build a separate odbc loadable module but rather build it into the cppdb library itself
sqlite_internal Don't build a separate sqlite3 loadable module but rather build it into the cppdb library itself
drizzle curl Enable the HTTP authentication plugin (using net-misc/curl). This is needed for the tests to apply properly.
doc Build the API documentation for the package, using app-doc/doxygen. Warning, this might take over an hour on slower machines.
gearman Enable the gearman plugins for user-defined functions and logging (using sys-cluster/gearman).
haildb Use the dev-db/haildb libraries to replace the innodb plugin storage engine with haildb (an innodb fork).
md5 Enable the MD5 plugin, using dev-libs/libgcrypt; this replaces the older openssl and gnutls USE flags.
memcache Enable the memcache plugin for user-defined functions and statistics in I_S tables (using dev-libs/libmemcached). Currently restricts tests because of an upstream testsuite bug.
pam Enable the PAM authentication plugin (using sys-libs/pam). The configuration file created will be /etc/pam.d/drizzle.
v8 Use dev-lang/v8.
firebird client Install client library and header files only
superserver Install SuperServer
xinetd Install ClassicServer
haildb debug Enable extra debug codepaths and assertions. If disabled, both the debug code and assertions are removed from the resulting binaries. Optimisations are untouched.
zlib Add support for compressed tables through sys-libs/zlib.
maatkit udf Build the MySQL UDFs shipped with maatkit, requires non-minimal MySQL
mariadb big-tables Make tables contain up to 1.844E+19 rows
cluster Add support for NDB clustering (deprecated)
community Enables the community features from upstream.
embedded Build embedded server (libmysqld)
extraengine Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
jemalloc Use dev-libs/jemalloc for allocations.
latin1 Use LATIN1 encoding instead of UTF8
libevent Use libevent for connection handling
max-idx-128 Raise the max index per table limit from 64 to 128
minimal Install client programs only, no server
oqgraph Add support for the Open Query GRAPH engine
pbxt Add experimental support for PBXT storage engine
profiling Add support for statement profiling (requires USE=community).
sphinx Add suport for the sphinx full-text search engine
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
mongodb mms-agent Install the MongoDB Monitoring Service agent
sharedclient build client shared library libmongoclient.so
spidermonkey Use embedded SpiderMonkey engine (dev-lang/spidermonkey) instead of v8
mysql big-tables Make tables contain up to 1.844E+19 rows
cluster Add support for NDB clustering (deprecated)
community Enables the community features from upstream.
embedded Build embedded server (libmysqld)
extraengine Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
jemalloc Use dev-libs/jemalloc for allocations.
latin1 Use LATIN1 encoding instead of UTF8
max-idx-128 Raise the max index per table limit from 64 to 128
minimal Install client programs only, no server
pbxt Add experimental support for PBXT storage engine
profiling Add support for statement profiling (requires USE=community).
raid Deprecated option, removed in the 5.0 series
systemtap Build support for profiling and tracing using dev-util/systemtap
test Install upstream testsuites for end use.
xtradb Add experimental support for Percona's InnoDB replacement: XtraDB
mysql-connector-c++ gcov Build coverage support
opendbx bindist Disable support for dev-db/firebird database which is not GPL compatible.
pgadmin3 databasedesigner Enable the Database Designer component
pgbouncer libevent Use libevent 2.0+ and evdns as the DNS backend
udns Use udns as the DNS backend. Supports IPv4 only.
pgpool2 memcached Use memcached for query caching.
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 gtk Build shp2pgsql-gui a graphical interface to shp2pgsql
postgresql-base pg_legacytimestamp Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
postgresql-server pg_legacytimestamp Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
uuid Enable server side UUID generation (via dev-libs/ossp-uuid)
psqlodbc iodbc Use dev-db/libiodbc. Disable to use dev-db/unixODBC.
recutils curl Enable support for remote descriptors using libcurl
mdb Build the mdb2rec utility
redis jemalloc Use dev-libs/jemalloc for allocations.
tcmalloc Use tcmalloc from dev-util/google-perftools for allocations.
soci boost Enable boost support
empty Build the sample backend called Empty
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
sqlite secure-delete Overwrite deleted information with zeros in addition to marking the space as available for reuse. This causes a performance penalty.
unixODBC minimal Disable bundled drivers and extra libraries (most users don't need these)
odbcmanual Administrator, Internal Structure, Programmer and User documentation

dev-embedded

Package Flag Description
avrdude ftdi Enable support for USB FTDI chips via dev-embedded/libftdi
libftdi tools build ftdi_eeprom helper tool
msp430-binutils multislot Allow for multiple versions of binutils to be emerged at once for same CTARGET
multitarget Adds support to binutils for cross compiling (does not work with gas)
msp430-gcc fixed-point Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
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)
mudflap Add support for mudflap, a pointer use checking library
multislot Allow for SLOTs to include minor version (3.3.4 instead of just 3.3)
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
msp430-gdb multitarget Support all known targets in one gdb binary
python Enable support for the new internal scripting language, as well as extended pretty printers
openocd blaster Enable support for Altera USE-Blaster
cmsis-dap Support for CMSIS-DAP compliant adapters
dummy Build the dummy port driver
ftd2xx Enable support for USB FTDI chips via dev-embedded/libftd2xx
ftdi Enable support for USB FTDI chips via dev-embedded/libftdi
minidriver Build the dummy minidriver
parport Enable support for parport JTAG devices
presto Enable support for AXIS PRESTO devices
segger Enable support for the Segger J-Link JTAG
stlink Enable building support for the ST-Link JTAG Programmer
verbose-io Verbose IO and comm JTAG and USB messages
versaloon Enable building support for the Versallon-lInk JTAG
ponyprog epiphany Enable support for www-client/epiphany
sdcc boehm-gc Enable Hans Boehm's garbage collector (dev-libs/boehm-gc)
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

Package Flag Description
aseprite memleak Enable memory-leaks detector (only for developers)
static Link against static version of C and C++ runtimes
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
crystalspace 3ds Enables support for .3DS files in CrystalSpace
bullet include support for Bullet library
cal3d include support for skeleton animation
cegui include support for Crazy Eddie GUI
cg NVIDIA toolkit plugin
ode include support for Open Dynamics Engine
guichan allegro Build the Allegro frontend
mygui linguas_ru Install some additional russian docs if 'doc' useflag enabled
plugins Build MyGUI plugins
samples Install MyGUI demos
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 boost enable boost support
cg NVIDIA toolkit plugin
double-precision more precise calculations at the expense of speed
freeimage support images via freeimage
gles2 build OpenGL ES 2.x RenderSystem
ois pull in Object-oriented Input System library for samples
poco when USE=threads, use poco for threading
tbb when USE=threads, use tbb for threading
tools build+install helper tools
zip support zip archives
openscenegraph fox Build examples using x11-libs/fox library
gdal Enable support for sci-libs/gdal library
itk Build dev-tcltk/itk plugin
openinventor Build OpenInventor plugin
osgapps Build osg applications
xrandr Enable support for the X xrandr extension
physfs grp Enable Build Engine GRP archive support
hog Enable Descent I/II HOG archive support
mvl Enable Descent I/II MVL archive support
qpak Enable Quake I/II QPAK archive support
wad Enable Doom WAD archive support
zip Enable ZIP archive support
simgear subversion Enables terrasync scenery downloader

dev-haskell

Package Flag Description
abstract-deque usecas Enable the reference implementation to use hardware compare-and-swap.
aeson developer Operate in developer mode.'
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.
cabal-install noprefs Ignore 'preferred-versions' file from hackage's tarball.
certificate executable Build the executable
cgi extensible-exceptions-in-base Required to be enabled for >=dev-lang/ghc-7.
chell color-output use colors in program output
citeproc-hs bibutils use Chris Putnam's app-text/bibutils
embed_data_files Embed locale files into the library (needed for windows packaging)
hexpat use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
network use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
small_base Choose the new smaller, split-up base package.
unicode_collation Use Haskell bindings to the dev-libs/icu
cmdargs quotation Build quote module
testprog Build the test program
comonad test-doctests Run the doctests test suite
conduit nohandles experimental code to use raw system calls in place of handles. Not recommended for general use
configfile buildtests Build the executable to run unit tests.
cpu executable build 'cpuid' tool
crypto-api all_cpolys Build all the CMAC polynomes up to 10000 bits instead of just the usual ones
crypto-conduit conduit11 Use conduit >= 1.1.
crypto-pubkey benchmark Build benchmarks.
cryptohash cryptoapi Defines crypto-api instances
dataenc tests Build unit and quickcheck tests.
distributive lib-werror Compile with the ghc -Werror option
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.
glib closure_signals Use the the GClosure-based signals implementation.
glut usenativewindowslibraries When compiling under Windows, use the native libraries instead of e.g. the ones coming with Cygwin.
gtk fmode-binary Set the default file translation mode for file I/O operations to _O_BINARY. Some GTK libraries open image files without specifing binary mode. If you have trouble loading gtk in ghci, then it may help to turn this option off.
gio Depend on GIO package, thereby enabling certain features.
gtk2hs-buildtools closuresignals Use the the GClosure-based signals implementation.
happstack-server template_haskell Description: Template Haskell is available on this system
hashable sse4_1 Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
hashed-storage diff Provide the Storage.Hashed.Diff module.
hpc Compile with the profiling ghc flag -fhpc.
hashtables bounds-checking if on, use bounds-checking array accesses
portable if on, use only pure Haskell code and no GHC extensions.
sse4_1 Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
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.
highlighting-kate executable Build the Highlight executable.
pcre-light Use the pcre-light library instead of regex-pcre-builtin.
hslogger buildtests Build the executable to run unit tests.
hsopenssl fast-bignum Enable fast moving of bignums between OpenSSL and GMP (GHC Only)
hstringtemplate quasi-quotation Build module providing a quasi-quoter
syb-with-class Generic instances for TOSElem
httpd-shed buildexamples Build example executables.
json generic Add support for generic encoder (dev-haskell/syb)
parsec Add support for parsing with Parsec
pretty Add support for using pretty printing combinators
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.
lib-werror Turn on ghc-options: -Werror
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-hlint You can disable the hlint test suite with -f-test-hlint
test-hunit You can disable the hunit test suite with -f-test-hunit
test-properties Build the properties test if we're building tests
trustworthy Assert that we are trustworthy when we can
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 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`.
pandoc-citeproc bibutils use Chris Putnam's app-text/bibutils
embed_data_files Embed locale files into the library (needed for windows packaging)
hexpat use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
network use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
small_base Choose the new smaller, split-up base package.
test_citeproc Build the test-citeproc program
unicode_collation Use Haskell bindings to the dev-libs/icu
persistent nooverlap Use OverlappingInstances only for String. Only developers should use this.
persistent-sqlite build-sanity-exe Build a sanity check test executable.
systemlib Use the system-wide sqlite library.
quickcheck template_haskell Enable additional test modules requiring Template Haskell support.
rfc5051 mkunicodedata build codes generator itself
scientific bytestring-builder Provide the Data.ByteString.Builder.Scientific module (requires bytestring >= 0.10).
semigroups 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.
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.
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.
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.
shakespeare-js test_coffee Test coffee.
test_export Test export.
test_roy Test roy.
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.
snap-core portable No non-haskell unportable code.
snap-server openssl enable https support using dev-haskell/hsopenssl
portable no non-haskell unportable code.
tagsoup download Build with Download module.
tasty colors Enable colorful output
texmath cgi Build texmath-cgi executable.
text developer operate in developer mode
tls compat Accept SSLv2 compatible handshake
transformers-base orphaninstances Build instances for orphan datatypes.
unix-compat old-time build against old-time package
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.
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
x11 screensaver whether to build XScreenSaver.
x509-store executable Build the executable
yaml no-exe don't install the yaml2json executable
system-libyaml Use system libyaml instead on generic one
zip-archive executable Build the Zip executable.

dev-java

Package Flag Description
ant antlr Enable ANTLR Ant tasks
bcel Enable bcel (bytecode manipulation) Ant tasks
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
log4j Enable Apache log4j Ant tasks
oro Enable Apache Oro Ant tasks
regexp Enable Apache Regexp Ant tasks
resolver Enable Apache Resolver Ant tasks
testutil Enable optional test util classes
antlr gunit gUnit is a "Unit Test" framework for ANTLR grammars
script Install a script to run antlr
bcel findbugs Include performance patch for findbugs package.
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
commons-modeler commons-digester Add support for the commons-digester based Mbeans Descriptor source
diablo-jdk jce Enable Java Cryptographic Extension Unlimited Strength Policy files
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.
fop hyphenation Precompile hyphenation patterns from the dev-java/offo-hyphenation package and install them as fop-hyph.jar
jai Enable jai support
jimi Enable jimi support
gjdoc xmldoclet Also build support for the xml doclet that generates output in xml instead of the traditional html javadoc.
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
gstreamer Build with GStreamer javax.sound.sampler provider
gtk Build with Gtk+ AWT peers
qt4 Build with Qt4 AWT peers
xml Build with native XML backend
httpcomponents-client deprecated Build deprecated classes
httpcomponents-core deprecated Build deprecated classes
ibm-jdk-bin javacomm Enable Java Communications API support
icedtea X Make X buildtime-only depenency.
alsa Make alsa buildtime-only dependency.
cacao Build CACAO virtual machine on platforms supporting HotSpot. (experimental)
cups Make CUPS build-only dependency.
jamvm Use the JamVM virtual machine rather than HotSpot.
jbootstrap If possible, recompile the final IcedTea executables with itself.
nsplugin Enable browser plugin (NPPlugin), requires also the webstart flag to be enabled.
nss Enable NSS security provider support.
pax_kernel For building when running a PaX enabled kernel.
systemtap Enable SystemTap probes in HotSpot.
webstart Enable Web Start support (via NetX).
zero Enable Zero assembler port (usually for non-HotSpot architectures)
icedtea-bin webstart Provide javaws command through symlink to icedtea-web
icedtea-web icedtea7 Build icedtea-7 support in addition to icedtea-6 support. Requires icedtea{-bin}-7
javascript Enable support for using proxy auto config (PAC) files.
nsplugin Enable the browser plugin (NPPlugin).
itext rtf Build and provide libraries for rich text format
rups Build and provide GUI for Reading/Updating PDF Syntax
jcs admin Enable JCS Admin servlets
jdbc-jaybird jni Build/Install JDBC Type 2 native components
jdbc-mysql c3p0 Enable c3p0 support
log4j Enable log4 support
jdbc-oracle-bin dms Enable support for the Oracle Dynamic Monitoring Service
ons Enable support for the Oracle Notification Services (ONS) deamon
jfreechart servlet Build a servlet using the servlet API.
jna awt Enables support for Java AWT
nio-buffers Enables support for NIO buffers
jython readline Use GNU readline instead of jline
servletapi Add optional support for servlet-api
log4j javamail Build the SMTPAppender
jms Build the JMSAppender
jmx Build org.apace.log4j.jmx
logback tomcat Builds Apache Tomcat support
lucene contrib Include extra functionality from contrib/
miglayout swt Add support for the SWT toolkit.
netbeans-nb keychain Automatically starts keychain on netbeans start and loads specified keys so Netbeans can use them.
oracle-jdk-bin derby Enable Installation of Bundled Derby (Java DB)
jce Enable Java Cryptographic Extension Unlimited Strength Policy files
pax_kernel Use paxctl to mark the JVM binaries.
oracle-jre-bin jce Enable Java Cryptographic Extension Unlimited Strength Policy files
pax_kernel Use paxctl to mark the JVM binaries.
proguard ant Ant task for using ProGuard in build.xml scripts
j2me Adds support for J2ME Wireless Toolkit
rxtx lfd Installs and uses LockFileServer daemon (lfd)
spymemcached spring Build support for the spring framework
sun-jdk derby Enable Installation of Bundled Derby (Java DB)
jce Enable Java Cryptographic Extension Unlimited Strength Policy files
pax_kernel Use paxctl to mark the JVM binaries.
sun-jre-bin jce Enable Java Cryptographic Extension Unlimited Strength Policy files
pax_kernel Use paxctl to mark the JVM binaries.
swt webkit Embedded browser support via net-libs/webkit-gtk:2, replacing former xulrunner-based browser.

dev-lang

Package Flag Description
bas lr0 Use the LR0 parser instead of the recursive descending parser
erlang compat-ethread Enable compatibility with pre-pentium 4 CPUs in the ethread library.
halfword Enable halfword emulator
hipe HIgh Performance Erlang extension
kpoll Enable kernel polling support
sctp Support for Stream Control Transmission Protocol
fpc ide Build and install the Free Pascal Compiler IDE
gdl grib Add support for the meteorological GRIB format with sci-libs/grib_api
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
ghc binary Install the binary version directly, rather than using it to build the source version.
ghcbootstrap Bootstrap from an existing GHC installation.
ghcmakebinary Build with less runtime depends (bundle libffi for building bootstrap binaries).
llvm Enable llvm code generator for ghc (-fllvm).
gnat-gcc lto Add support for link-time optimizations (unsupported, use at your own risk).
icc eclipse Install the dev-util/eclipse-sdk plugins
icon iplsrc install the icon programming library source
idb eclipse Install the dev-util/eclipse-sdk plugins
io clutter Build add-on for media-libs/clutter
editline Build add-on for dev-libs/libedit
google Build the google search add-on
gui Build the Flux GUI add-on
http Build http client add-on
image Build add-on for images support (jpeg, png, tiff)
libxml2 Build add-on for dev-libs/libxml2
md5sum Build md5sum add-on
sha1 Build sha1 add-on
twitter Build twitter add-on
lazarus minimal Don't build extra packages from the bigide component
logtalk fop Support for generating pdf documentation using fop
gnupl Support GNU Prolog back-end compiler
qupl Support Qu-Prolog back-end compiler
swipl Support SWI-Prolog back-end compiler
xsbpl Support XSB back-end compiler
xslt Support for generating html documentation using xslt
yappl Support YAP back-end compiler
lua deprecated make deprecated data structures/routines available
luajit lua52compat Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.
mercury erlang Support Mercury Erlang grade
mlton binary install a binary version (need to do this once to bootstrap, until smlnj is supported)
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 moar Build the MoarVM backend (experimental/broken)
parrot Build the parrot backend (default)
path64 assembler Build PathAS
debugger Build PathDB
native Use EKOPath/Path64 for bootstraping
valgrind Use dev-util/valgrind for memory debbuging
perl ithreads Enable Perl threads, has some compatibility problems
php cli Enable CLI SAPI
embed Enable embed SAPI
enchant Add supports Enchant spelling library.
fileinfo Add fileinfo extension support
filter Add filter extension support
fpm Enable the FastCGI Process Manager SAPI
gd Adds support for gd (bundled with PHP)
hash Enable the hash extension
intl Enables the intl extension for extended internalization support
json Enable JSON support
ldap-sasl Add SASL support for the PHP LDAP extension
libmysqlclient Use libmyslclient driver for mysql, mysqli, PDO_Mysql (not recommended)
mysqlnd Use native driver for mysql, mysqli, PDO_Mysql
opcache Enables built-in opcode cache, replacing pecl-apc et.al
pdo Enable the bundled PDO extensions
phar Enables the phar extension to provide phar archive support
sqlite2 Add sqlite2 support. Will be removed
xmlreader Enable XMLReader support
xmlwriter Enable XMLWriter support
xslt Enable the XSL extension
zip Enable ZIP file support
polyml portable Build the portable interpreter version of Poly/ML instead of native.
python 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 moar Build the MoarVM backend (experimental)
parrot Build the parrot backend (default)
rubinius llvm Build with llvm. Currently the package only builds against old versions of llvm.
ruby rdoc Install dev-ruby/rdoc after installing Ruby.
readline Use the sys-libs/readline library to provide the readline extension, used for instance by the irb tool. This flag is meaningful only if the libedit USE flag is disabled. If neither libedit nor readline USE flags are enabled, the readline extension will not be built (and irb will lose line editing functionality).
rubytests Install ruby tests that can only be run after ruby is installed
yaml Use the dev-libs/libyaml library to build the psych extension, available since Ruby 1.9.2_rc2, in alternative to the bundled syck-based parser.
rust binary-bootstrap Download precompiled rust for compilator bootstrap
clang Use sys-devel/clang for building
scala binary Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
spidermonkey 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
system-icu Use the system-wide dev-libs/icu instead of bundled -- note, only takes effect when icu flag is enabled
threadsafe Build a threadsafe version of spidermonkey
swi-prolog archive Use libarchive for extension packs
swig ccache build ccache-swig(a fast compiler cache)
vala vapigen Enable vala's library binding generator
yap R Enable support for connecting R to Prolog

dev-libs

Package Flag Description
DirectFB bmp build BMP image provider
divine enable DiVine
drmkms build with DRM/KMS support
dynload enable dynload support
egl build with EGL support
fusiondale enable FusionDale
fusionsound enable FusionSound
gles2 build gles2 gfxdriver
imlib2 build Imlib2 image provider
input_hub provides an asynchronous interface to the input devices available and those being added/removed
mpeg2 build MPEG2 image provider
mpeg3 build Libmpeg3 video provider
multicore enable multicore support
pnm build PNM (PBM/PGM/PPM) image provider
sawman enable SaWMan (window manager and application manager)
swfdec build Swfdec (Flash decoder) video provider
tremor build Ogg/Vorbis music provider using Tremor
webp build WebP image provider
STLport boost Enable the usage of dev-libs/boost
ace ciao Include Component Intergraced Ace ORB into the build of ace
tao Include the ACE ORB (CORBA stuff) (called tao) into the build of ace
antlr-c debugger Compiles debug info into the library
apr older-kernels-compatibility Enable binary compatibility with older kernels
urandom Use /dev/urandom instead of /dev/random
apr-util nss Install apr_crypto_nss module
openssl Install apr_crypto_openssl module
bitset jemalloc Use dev-libs/jemalloc for allocations
tcmalloc Use tcmalloc from dev-util/google-perftools for allocations
blitz boost Enable usage of boost::serialization
boost context Build and install the Boost.Context library and all other Boostlibraries that depends 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.
threads Build multi-thread-compatible libraries instead of single-threaded only.
tools Build and install the boost tools (bcp, quickbook, inspect, wave)
c-blosc lz4 Enable lz4 compression
snappy Enable snappy compression
check subunit Enable support for the subunit unit test protocol
cyberjack fox Enable installation of x11-libs/fox based fxcyberjack program
cyrus-sasl authdaemond Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)
ldapdb Enable ldapdb plugin
ntlm_unsupported_patch Add NTLM net-fs/samba NOT supported patch
openldap Add ldap support for saslauthd
sample Enable sample client and server
srp Enable SRP authentication
urandom Use /dev/urandom instead of /dev/random
dbus-c++ ecore Use Ecore integration
glib Use glib integration
e_dbus bluetooth Enable interfacing with net-wireless/bluez DBus API.
ofono Enable interfacing with net-misc/ofono DBus API.
test-binaries Enable building of test binaries for enabled features
ecore ares Enables support for asynchronous DNS using the net-dns/c-ares library
evas Provides easy to use canvas by gluing media-libs/evas and various input/output systems.
gles Add gles support to the ecore-evas-wayland module
glib Enable dev-libs/glib eventloop support
inotify Enable support for inotify
tslib Build with tslib support for touchscreen devices.
wayland Add support for dev-libs/wayland
xprint Enable X11 Xprint support
eeze utilities Install some test utilities for mount/umount support in eeze
efl bmp Enable WBMP image loader.
drm Enable DRM engine.
eet Enable Eet image loader.
egl Enable EGL rendering.
fribidi Enable bidirectional text support.
gles Enable the OpenGL ES GL implementation.
glib Enable dev-libs/glib support.
harfbuzz Enable complex text shaping and layout support.
ibus Enable Intelligent Input Bus.
ico Enable Ico image loader.
jp2k Enable JPEG 2000 image loader.
oldlua USE dev-lang/lua instead of dev-lang/luajit
physics Enable Bullet physics effects and support.
pixman Enable PixMan for software rendering.
ppm Enable PMAPS image loader.
psd Enable PSD image loader.
scim Enable Smart Common Input Method.
tga Enable Tga image loader.
tslib Enable x11-libs/tslib for touchscreen events.
v4l2 Enable Video4Linux2 support.
webp Enable WebP image loader.
xim Enable X Input Method.
eina default-mempool By default use system's allocator (pass-through) instead of custom choice for Eina's own data structures.
mempool-buddy Compile "buddy" memory pool allocation.
mempool-chained-pool Compile "chained-pool" memory pool allocation.
mempool-fixed-bitmap Compile "fixed-bitmap" memory pool allocation.
mempool-one-big Compile "one-big" memory pool allocation.
mempool-pass-through Compile "pass-through" (system's malloc) memory pool allocation.
valgrind Compile in valgrind hints for smoother integration.
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)
fampp2 stlport Include support for dev-libs/STLport
fcgi html Install HTML documentation
ferrisloki stlport Include support for dev-libs/STLport
folks socialweb Load web service contacts using net-libs/libsocialweb
telepathy Load contacts from the Telepathy framework
tracker Load contacts from app-misc/tracker index
utils Build the folks-inspect utility
zeitgeist Add support for Zeitgeist event tracking system
gecode gist Enable Gist, the Gecode Interactive Search Tool
geoip city Install the city based IP address database
gf2x bindist Disable automatic fine-tuning to local processor features like pclmul or sse2.
glib 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.
gmp pgo after building gmp, run some tests against to produce faster libraries -- this option will double the compile time
gobject-introspection doctool Install g-ir-doc-tool for generating documentation from introspected data
intel-common compiler Install the libraries needed for the icc and ifort compilers
jemalloc stats Enable statistics calculation/reporting
keybinder introspection Use dev-libs/gobject-introspection for introspection
leveldb snappy support the snappy compression library
libRocket samples Build samples
libappindicator introspection Use dev-libs/gobject-introspection for introspection
libburn cdio Enable EXPERIMENTAL use of libcdio as system adapter
track-src-odirect Read track input with O_DIRECT (see man 2 open), this may deliver a better write performance in some situations
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.
libcgroup daemon Install the configuration tools and init/config files.
tools Install the cgroup rules processing daemon and init/config files.
libdbusmenu introspection Use dev-libs/gobject-introspection for introspection
libdivecomputer tools Install tools that can be used to test the library.
libevent debug Support runtime debug mode and malloc hooks (for programmers)
libffi pax_kernel Use PaX emulated trampolines, for we can't use PROT_EXEC
libflatarray cuda Enables plugins for NVIDIA GPUs (e.g. CUDAAllocator)
libgdata vala Enable bindings for dev-lang/vala
libgit2 ssh Enable SSH transport support
trace Enable tracing support
libgpg-error common-lisp Install common-lisp files
libgusb vala Enable bindings for dev-lang/vala
libgweather glade Installs catalog files for dev-util/glade
libindicate introspection Use dev-libs/gobject-introspection for introspection
libisoburn cdio Enable EXPERIMENTAL use of libcdio as system adapter
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
libjit interpreter Enable the libjit interpreter
long-double Enable the use of long double for jit_nfloat
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).
libmail apop Enables the APOP authentication method
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
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, through sys-libs/zlib.
pcre16 Build 16 bit PCRE library.
pcre32 Build 32 bit PCRE library.
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, through app-arch/gzip.
libpeas gjs Build support for loading JavaScript plugins using dev-libs/gjs
glade Install the glade catalog
python Build support for loading dev-lang/python plugins
seed Build support for loading JavaScript plugins using dev-libs/seed
librra recurrence Enable recurrence support (EXPERIMENTAL)
libsodium asm Enables assembly implementations
urandom Use /dev/urandom instead of /dev/random
libsqlora8 orathreads Use Oracle threads
libunique introspection Use dev-libs/gobject-introspection for introspection
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
libzypp libproxy Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
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 Builds the Graphical User Interface API and utilities for the package.
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
nss cacert Include root certs from CAcert (http://http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
nss-pem Add support for libnsspem
utils Install utilities included with the library
oniguruma combination-explosion-check enable combination explosion check
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.
udev Install rules for sys-fs/udev to auto-start openct.
openobex irda Enable IrDA support
opensc ctapi Use CT-API for accessing Smartcard hardware.
libtool Use sys-devel/libtool for dynamically loading libraries rather than the host libdl/dlopen helpers.
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 bindist Disable EC/RC5 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)
tls-heartbeat Enable the Heartbeat Extension in TLS and DTLS
pkcs11-helper nss Enable NSS crypto engine
ppl lpsol Build the ppl_lpsol linear programming problem solver
seed profile Build support for profiling dev-libs/seed for development purposes
soprano raptor Enables support for media-libs/raptor RDF parser/serializer.
redland Enables support for the dev-libs/redland storage backend (really slow one).
virtuoso Enables support for dev-db/virtuoso storage backend.
starpu cuda Enable NVIDIA CUDA toolkit support
gcc-plugin Enable GCC extension plugin (experimental)
opencl Enable OpenCL support
tinyxml stl Compile with TIXML_USE_STL support
tntnet server Enable tntnet server daemon
totem-pl-parser archive Enables support for accessing media files in archives transparently via app-arch/libarchive
introspection Use dev-libs/gobject-introspection for introspection
quvi Use media-libs/quvi for parsing video links
ucommon socks Build with socks proxy support
udis86 pic Force shared libraries to be built as PIC
weston clients Enable support for clients
colord Allow setting color managment
drm Enable drm compositor support
editor Install wayland-editor example application
egl Enable egl acceleration
fbdev Enable fbdev compositor support
gles2 Use GLESv2 cairo instead of full GL
headless Headless backend and a noop renderer, mainly for testing purposes
launch Install weston-launch utility
rdp Enable Remote Desktop Protocol compositor support
resize-optimization Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi
rpi Raspberry Pi GPU support
screen-sharing Enable screen-sharing through RDP
simple-clients Enable simple-clients
tablet Enable interface for tablets
unwind Enable libunwind usage for backtraces
view Install wayland-view example application
wayland-compositor Enable Wayland compositor support
x11 Enable X11 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
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
xml-security-c nss Use dev-libs/nss for certain crypto operations (configureable at runtime)
xalan Enable support for XSLT and XPath parsing by dev-libs/xalan-c
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
xqilla faxpp Use dev-libs/faxpp instead of Xerces-C for certain tasks
htmltidy Use app-text/htmltidy when parsing HTML
yaz ziffy Install ziffy, a promiscuous Z39.50 APDU sniffer

dev-lisp

Package Flag Description
abcl clisp Build Armed Bear Common Lisp using GNU CLISP
cmucl Build Armed Bear Common Lisp using CMU Common Lisp
jad Enable support for disassembling compiled code using JAD
clisp hyperspec Use local hyperspec instead of online version
new-clx Build CLISP with support for the NEW-CLX module which is a C binding to the Xorg libraries
pari Build CLISP with support for the PARI Computer Algebra System
svm Build CLISP with support for the Support Vector Machine module
cmucl nosource Don't include source code for CMUCL in installation
source Include source code for CMUCL in installation
ecls gengc Use generational garbage collection (experimental)
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 asdf Include support for dev-lisp/asdf in SBCL
ldb Include support for the SBCL low level debugger
pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel

dev-lua

Package Flag Description
luarocks curl Uses net-misc/curl for fetching lua packages instead of net-misc/wget.
openssl Uses dev-libs/openssl for verifying lua packages instead of md5sum.
luvit bundled-libs Use bundled versions of some libraries.
system-libs Use system version of dev-libs/yajl.

dev-ml

Package Flag Description
cairo-ocaml pango Enable support for x11-libs/pango
deriving-ocsigen type-conv Enable type-conv for the syntax extention.
js_of_ocaml deriving-ocsigen Enable deriving-ocsigen for improving the type safety.
lablgtk glade Enable libglade bindings compilation.
gnomecanvas Enable libgnomecanvas bindings compilation.
sourceview Enable GtkSourceView support
lwt react Enables support for dev-ml/react: Functional reactive programming (signals, events, etc.).
ocamlnet cryptokit Enables encryption support via dev-ml/cryptokit
httpd Enables net-httpd web server component
zip Enables netzip support to read/write gzip data using object channels
pgocaml batteries Enable Batteries support instead of extlib
tyxml ocamlduce Enables ocamlduce XML typechecking.

dev-perl

Package Flag Description
App-Nopaste clipboard copying of URLs with -x/--copy
github Github authentication
pastebin pastebin.com support
DBD-mysql embedded Support embedded server (libmysqld)
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
Eidetic auth Enables dev-perl/Apache-AuthTicket based cookie authentication
File-HomeDir xdg Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs
GD animgif Enable animated gif support
Graphics-ColorNames recommended Install recommended support modules
HTML-Mason modperl Enable www-apache/mod_perl support
Lab-Measurement xpression Install the Xpression measurement framework
Net-OpenSSH sftp Enable SFTP protocol support.
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
plplot Enable plplot plotting capabilities
Panotools-Script gui Installs GUIs for some tools
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

dev-php

Package Flag Description
PEAR-HTTP_Download minimal Do not include support for PEAR-MIME_Type
postgres Send postgres LOBs without buffering
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_Shell auto-completion Enable tab-completion
ZendFramework cli Enables the CLI
doc Installs the documentation
examples Installs the examples
minimal Installs the minimal version without Dojo toolkit, tests and demos
eaccelerator disassembler Enable the eA disassembler
doccommentinclusion If you want eAccelerator to retain doc-comments in internal php structures.
inode Use inode-based caching
pecl-apc 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-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
smarty-docs html Install the documentation in HTML format
pdf Install the documentation in PDF format

dev-python

Package Flag Description
Kivy camera Install libraries needed to support camera
garden Install garden tool to manage user maintained widgets
PyFoam extras Enable optional dependencies
PyQt4 X Build QtGui and QtTest modules
declarative Build QtDeclarative module
designer Build QtDesigner module
help Build QtHelp module
kde Select media-libs/phonon as Phonon variant (needed for KDE)
multimedia Build QtMultimedia module
opengl Build QtOpenGL module
phonon Build phonon module
script Build QtScript module
scripttools Build QtScriptTools module
sql Build QtSql module
svg Build QtSvg module
webkit Build QtWebKit module
xmlpatterns Build QtXmlPatterns module
PyQtMobility contacts Build bindings for the QtContacts module
feedback Build bindings for the QtFeedback module
gallery Build bindings for the QtGallery module
location Build bindings for the QtLocation module
messaging Build bindings for the QtMessaging module
multimedia Build bindings for the QtMultimediaKit module
organizer Build bindings for the QtOrganizer module
publishsubscribe Build bindings for the QtPublishSubscribe module
sensors Build bindings for the QtSensors module
serviceframework Build bindings for the QtServiceFramework module
systeminfo Build bindings for the QtSystemInfo module
versit Build bindings for the QtVersit module
amqplib extras Install extra tools to generate initial Python mod from an AMQP XML file
anyvc bazaar Add support for Bazaar
mercurial Add support for Mercurial
bokeh chaco Enable interface for implementing qplot and ggplot like functionality using chaco
bpython urwid Backend based on dev-python/urwid
celery redis Enables redis support
cgkit 3ds Enable support for importing 3D Studio models
cvxopt dsdp Use interior point library sci-libs/dsdp
glpk Use GNU Linear Programming Kit sci-mathematics/glpk
cython numpy Enable support for dev-python/numpy
dap server Enable OpenDAP server support
django-extensions graphviz Create a diagram of your database entity relationships using dev-python/pygraphviz.
s3 Upload your media files to S3.
vcard Export your users email addresses to the vcard format.
django-tastypie bip An optional serialiser dev-python/biplist
digest Library to aid in implementing HTTP Digest Authentication
lxml An optional serialiser dev-python/lxml
oauth Adds OAuth authentication support
yaml An optional serialiser dev-python/yaml
docutils glep Install support for GLEPs
falcon cython Build cython-based python modules
flask-restful paging Enable resource paging support
geopy yahoo Enables use of YahooPlaceFinder
gmpy mpir Use sci-libs/mpir as gmp implementation
icalendar doc Generate examples and other extra documentation
ipython matplotlib Add support for dev-python/matplotlib
mongodb Enable support for MongoDB via dev-python/pymongo
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
octave Enable octave bridge via dev-python/oct2py
kaa-base tls SSL/TLS support via dev-python/tlslite
kazoo gevent Enable support for the gevent based handler
kombu amqplib Enable amqplib support
msgpack Enables MessagePack (de)serializer for Python
sqs Enables Amazon SQS transport module for Kombu
ldaptor web enable the web front end for ldaptor (uses dev-python/nevow)
lxml beautifulsoup3 Enable support for Beautiful Soup 3
markdown pygments Enable fancy pygments support
matplotlib excel Pull dev-python/xlwt for the exceltools toolkit
gtk3 Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
pyside Qt support via dev-python/pyside
mpmath matplotlib Add support for dev-python/matplotlib
mwlib server Install the daemons required when using mwlib for generating PDFs on a MediaWiki instance.
mwlib-rl pdftk Enable support for app-text/pdftk, required to generate TOCs
netaddr cli Enable netaddr shell with dev-python/ipython
nose coverage Utilize dev-python/coverage
numexpr mkl Enable support for Intel Vector Math Library, part of sci-libs/mkl.
pandas R Enable support for R via dev-python/rpy
excel Pull a few Python packages for Microsoft Excel i/o
html Enable HTML i/o via dev-python/beautifulsoup
paste flup enable support for flup (and therefore for various wgsi servers and middleware)
openid enable OpenID support
pillow webp Enable support for webp image format.
psycopg mxdatetime Enable support for MX DateTime and use it instead of Python's built-in datetime module
py-amqp extras Install extra tools to generate initial Python mod from an AMQP XML file
pylons genshi Add optional genshi support
jinja Add optional jinja support
pymongo mod_wsgi Disable the C extension to work with mod_wsgi.
pypax ptpax Enable PT_PAX_FLAGS support.
xtpax Enable XATTR_PAX_FLAGS support.
pyplusplus indexing Install indexing_suite_v2 to enhance boost python
numpy Generate code for dev-libs/boost-numpy to accelerate arrays
pypy sandbox Enable sandboxing functionality
shadowstack Use a shadow stack for finding GC roots
pypy-bin shadowstack Use a shadow stack for finding GC roots
pyquery beautifulsoup3 Support BeautifulSoup 3
pyrax keyring adds support for the keyring auth backend
pyside X Build QtGui and QtTest modules
declarative Build QtDeclarative module
designer Build QtDesigner and QtUiTools modules
help Build QtHelp module
kde Select media-libs/phonon as Phonon variant (needed for KDE)
multimedia Build QtMultimedia module
opengl Build QtOpenGL module
phonon Build phonon module
script Build QtScript module
scripttools Build QtScriptTools module
sql Build QtSql module
svg Build QtSvg module
webkit Build QtWebKit module
xmlpatterns Build QtXmlPatterns module
pytables contrib Install user-contributed files
python-stdnum vies Enable VIES
pyudev pygobject Install PyGobject binding
pyqt4 Install PyQt4 binding
pyside Install PySide binding
pyyaml libyaml enable support for C implementation using libyaml
pyzmq green Enable gevent compatibility with zeromq
pyzor mysql Enables mysql support
pyzord enable support for pyzord
redis Enables redis support
rarfile compressed Enables the module to support compressed v3 archives by calling the app-arch/unrar.
rdflib redland enable support for Redland triplestore
restkit cli Install the restcli command line interface/tool, based on dev-python/ipython
scrapy boto Add support for Amazon S3 via dev-python/boto
ibl Use Instace Based Learning alrogirithm for automatic extraction
simplecv shell Enable the iPython SimpleCV shell
spyder ipython Add support for dev-python/ipython
matplotlib Add support for dev-python/matplotlib
numpy Add support for dev-python/numpy
pep8 Add support for dev-python/pep8
pyflakes Add support for dev-python/pyflakes
pylint Add support for dev-python/pylint
rope Add support for dev-python/rope
scipy Add support for sci-libs/scipy
sphinx Add support for dev-python/sphinx
starcluster epydoc Enable build of apidocs in html using epydoc
sympy imaging Add support for dev-python/imaging
ipython Add support for dev-python/ipython
mathml Add support for mathml
pyglet Use dev-python/pyglet for plots and print preview
system-mpmath Use mpmath from portage instead of the bundled one
texmacs Add app-office/texmacs interface
theano Add support for dev-python/theano
tdaemon coverage Enable code coverage support
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
twisted-core serial include serial port support
vatnumber vies Enable VIES
ws4py client Install client modules
server Install server modules
wxpython doc Install HTML wxWidgets docs and wxpython API reference.
examples Install interactive demo module browser and sample applets.
zsi twisted add support for dev-python/twisted

dev-qt

Package Flag Description
assistant exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
designer declarative Build the qdeclarativeview plugin
exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
phonon Build the phononwidgets plugin
qt3support Build the qt3supportwidgets plugin
webkit Build the qwebview plugin
linguist exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
pixeltool exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qdbusviewer exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qt-creator android Build plugin for Android devices
autotools Enable autotools project manager plugin
baremetal Build plugin for bare metal devices
bazaar Add support for dev-vcs/bzr version control system
clearcase Add support for IBM ClearCase version control system (requires manual installation of ClearCase client)
cmake Enable cmake project manager plugin
fakevim Enable support for vim-like key bindings
ios Build plugin for Apple iOS devices
madde Enable integration with MADDE (Maemo Application Development and Debugging Environment)
mercurial Add support for dev-vcs/mercurial version control system
perforce Add support for Perforce version control system (requires manual installation of Perforce client)
python Enable Python source code editor
qnx Build plugin for QNX/Blackberry devices
valgrind Add support for memory debugging using dev-util/valgrind
qt-meta kde Select media-libs/phonon as Phonon variant (needed for KDE)
opengl Enable the QtOpenGL module
openvg Enable the QtOpenVG module
qt3support Enable the Qt3Support library for Qt4
qt-mobility bearer Build the QtBearer module
bluetooth Enable Bluetooth support in QtConnectivity and QtSystemInfo modules
connectivity Build the QtConnectivity module
contacts Build the QtContacts module
feedback Build the QtFeedback module
gallery Build the QtGallery module
location Build the QtLocation module
messaging Build the QtMessaging module
multimedia Build the QtMultimediaKit module
networkmanager Enable NetworkManager support in QtBearer and QtSystemInfo modules
organizer Build the QtOrganizer module
publishsubscribe Build the QtPublishSubscribe module
pulseaudio Enable PulseAudio support in QtMultimediaKit module
qml Build QML bindings
sensors Build the QtSensors module
serviceframework Build the QtServiceFramework module
systeminfo Build the QtSystemInfo module
tools Build various useful tools (e.g.: qcrmlgen, servicexmlgen, vsexplorer, ...)
versit Build the QtVersit module
qt3support exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qtbearer exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qtcore exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
glib Enable dev-libs/glib eventloop support
qt3support Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
qtdbus exceptions Add support for exceptions - like catching them inside the event loop (recommended by Nokia)
qtdeclarative exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
localstorage Build the LocalStorage import for QtQuick (requires QtSql)
qt3support Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
webkit Build the WebView QML component
widgets Enable QtWidgets support
qtdemo dbus Build QtDBus examples and demos
declarative Build QtDeclarative examples and demos
exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
multimedia Build QtMultimedia examples and demos
opengl Build QtOpenGL examples and demos
openvg Build QtOpenVG examples and demos
phonon Build Phonon examples and demos
qt3support Build Qt3Support examples and demos
webkit Build QtWebKit examples and demos
xmlpatterns Build QtXmlPatterns examples and demos
qtgui egl Use EGL instead of default GLX to manage OpenGL contexts on the desktop
exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
glib Enable dev-libs/glib eventloop support
gtkstyle Build a Qt style called GTK+ that mimics the active GTK+ theme
qt3support Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
trace Build the 'trace' graphicssystem engine which allows to record all drawing operations into a trace buffer. Later it can be replayed with the qttracereplay utility
qthelp compat Build the extra compatibility layer required by a few packages, see http://blog.qt.digia.com/blog/2010/06/22/qt-assistant-compat-version-available-as-extra-source-package/
exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qtmultimedia exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qtopengl egl Use EGL instead of default GLX to manage OpenGL contexts on the desktop
exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qt3support Enable the Qt3Support libraries for Qt4
qtopenvg exceptions Build with support for exceptions
qt3support Enable the Qt3Support libraries for Qt4
qtphonon exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qt3support Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
qtscript exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
scripttools Build the QtScriptTools module (requires QtWidgets)
qtsql exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qt3support Enable the Qt3Support libraries for Qt4
qtsvg exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qttest exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
qtwebkit exceptions Add support for exceptions - like catching them inside the event loop (recommended by upstream)
gstreamer Enable HTML5 audio/video support via media-libs/gstreamer
libxml2 Use dev-libs/libxml2 for XML parsing
multimedia Enable HTML5 audio/video support via dev-qt/qtmultimedia
qml Build QML/QtQuick bindings
webp Add support for WebP image format
widgets Build various things that depend on dev-qt/qtwidgets, e.g. the WebKitWidgets library
xslt Enable XSLT support

dev-ruby

Package Flag Description
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.
facter dmi Use sys-apps/dmidecode to determine hardware system properties
pciutils Use sys-apps/pciutils to determine hardware system properties
virt Use app-emulation/virt-what for virtual machine detection
maruku highlight Enable source code highlighting via dev-ruby/syntax
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.
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

dev-scheme

Package Flag Description
bigloo bglpkg Build bglpkg binary, which can be use to access scmpkg servers (requires web)
calendar Build the embedded library for calendar programming
crypto Build the embedded cryptographic library
debug Enable extra debug codepaths
doc Install Bigloo Manual (HTML docs of Bigloo and r5rs)
emacs Build and install the Bigloo Developement Environment for Emacs (aka bee-mode)
gmp Adds support for dev-libs/gmp (GNU MP library)
java Enable the JVM backend for the Bigloo compiler
mail Mail library for email management (e.g. maildir and imap support)
multimedia Build multimedia library (e.g. for managing images). Needed for dev-scheme/hop
openpgp Build OpenPGP support (requires crypto)
packrat Bigloo port of Tony Garnock-Jones' packrat parser (requires srfi1)
sqlite Use the system-wide dev-db/sqlite
srfi1 Build the srfi1 library: List library
srfi27 Build the srfi27 library: Source of Random Bits (32bit-arch only, requires gmp)
ssl Adds support for SSL connections through dev-libs/openssl
text Library for dealing with text (e.g. BibTeX parser)
threads Enable thread support, it depends on dev-libs/boehm-gc built with threads use flag
web Library for web programming (e.g. XML, CGI parsers). Needed for dev-scheme/hop
chicken parallel-build Enable testing parallel build mode added in 4.7.3 version. Can still be not working
gauche-gl cg Enable NVidia Cg binding
gauche-gtk glgd Enable GL graph draw
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
hop debug Enables building with debug symbols
ssl Enable SSL support for hop
threads Enable thread support for hop, it depends on dev-scheme/bigloo built with threads use flag.
kawa awt Assume AWT is available
echo2 Enable support for the Echo2 web toolkit with dev-java/echo2
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 dev-java/servletapi
swing Assume Swing is available
swt Assume SWT is available with dev-java/swt
xqtests Support XQuery Test Suite
racket backtrace Support GC backtrace dumps
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.
plot Enable plot libraries
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.
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.

dev-tcltk

Package Flag Description
expect-lite debug pull in packages needed for runtime interactive debugger
tktreectrl shellicon shellicon extension

dev-tex

Package Flag Description
abntex lyx Install with app-office/lyx layout
circuit_macros script Install cm2pdf to automatically create a correctly sized PDF from a circuit_macro m4 source
dot2texi pgf Enable support for dev-tex/pgf (The TeX Portable Graphic Format)
pstricks Enable pstricks support

dev-util

Package Flag Description
android-ndk legacy-toolchains Install legacy toolchains
target-32 Support for 32-bit targets
target-64 Support for 64-bit targets
anjuta devhelp Enable devhelp integration
glade Build glade plugin for anjuta
packagekit Use packagekit to search for missing tools
terminal Enable terminal plugin based on x11-libs/vte
vala Enable support for the Vala programming language
apitrace cli Enable command line interface
egl Enable EGL support
buildbot irc Add support for status delivery through an ircbot.
mail Add support for watching a maildir for commits.
manhole Add support for manhole (debug over ssh)
catalyst ccache Enables ccache support
coccigrep vim Install the coccigrep vim plugin
codeblocks contrib Build additional contrib components
cppcheck htmlreport install cppcheck-htmlreport
ctags ada Enable Ada support
cwdiff a2ps install app-text/a2ps for postscript output
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
emilpro system-binutils Use the gentoo binutils instead of building against an unpatched vanilla version
fatrace powertop Add powetop integration
geany vte Enable Terminal support (x11-libs/vte)
geany-plugins autoclose Enable the autoclose plugin.
commander Enable the commander plugin which provides a command panel for rapid access to any action.
debugger Enable the debugger plugin which interfaces with sys-devel/gdb
defineformat Enable the defineformat plugin.
devhelp Enable the devhelp plugin which integrates dev-util/devhelp
enchant Enable spell checking using enchant
gpg Enable geanypg plugin which integrates GPG using app-crypt/gpgme
gtkspell Use gtkspell for dictionary support
markdown Enable the markdown plugin which uses app-text/discount and net-libs/webkit-gtk to display a realtime preview markdown.
multiterm Enable the multiterm plugin
scope Enable the scope plugin which is a graphical GDB front-end
soup Enable updatechecker and geniuspaste plugins which require net-libs/libsoup
webkit Enable webhelper plugin which requires net-libs/webkit-gtk
global vim Integrate the GNU GLOBAL source code tag system with Vim
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.
minimal Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.
gtk-doc highlight Enable source code highlighting
vim Enable source code highlighting through app-editors/vim
intel-ocl-sdk tools Install Intel Offline Compiler
kdevelop cmake Enable support for CMake build system
okteta Enable hex editor plugin
qthelp Enable support for QtHelp documentation browsing
reviewboard Enable reviewboard support
kdevplatform reviewboard Enable reviewboard support
ltrace unwind Use sys-libs/libunwind for frame unwinding support
lttng-tools ust Support LTTng-UST (Userspace Tracing)
meld highlight Enable source code highlighting via dev-python/pygtksourceview
metro ccache Enable support for ccache
git Enable support for git snapshots
threads Enable support for pbzip2 tarball packing/unpacking
mingw64-runtime idl Install idl files.
molecule plugins Add plugins provided by dev-util/molecule-plugins
monkeystudio plugins Build and install additional plugins
nemiver memoryview Enable the optional hexadecimal memory inspection with app-editors/ghex.
nsis config-log Enable the logging facility (useful in debugging installers)
nvidia-cuda-sdk cuda Build CUDA binaries.
emulation Build binaries for device emulation mode. These binaries will not require a CUDA-capable GPU to run.
opencl Build OpenCL binaries.
nvidia-cuda-toolkit debugger Installs the CUDA debugger.
eclipse Install the dev-util/eclipse-sdk plugins
profiler Installs the NVIDIA CUDA visual profiler.
perf audit Enable support for sys-process/audit.
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.
perl Add support for Perl as a scripting language for perf tools.
unwind Use sys-libs/libunwind for frame unwinding support.
pkgconf pkg-config Install as a replacement for dev-util/pkgconfig
strict Adhere to POSIX pkg-config specification. Useful for finding uses of non-standard pkg-config invocations.
pkgconfig internal-glib Use internal copy of dev-libs/glib
pkgconfig-openbsd pkg-config Install as a replacement for dev-util/pkgconfig
qbs gui Build QBS graphical configuration tool
qdevelop plugins Build and install additional plugins
reviewboard codebase Enables a build of the docs/codebase folder
manual Enables a build of the docs/manual folder
rnotes Enables a doc build of the release notes
scanmem gui Enable the GameConqueror GUI
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.
squashdelta lz4 Enable support for LZ4 compression using app-arch/lz4
squashmerge lz4 Enable support for LZ4 compression using app-arch/lz4
strace aio Enable dev-libs/libaio support for tracing Asynchronous I/O operations
suse-build symlink Provide compatibility symlinks with original openSUSE package (might clash with other packages)
universalindentgui html Add support for HTML files

dev-vcs

Package Flag Description
bzr sftp Enable sftp support
bzr-gtk gconf Enable GConf support
gpg Support signing with GnuPG.
nautilus Integrate with Nautilus file manager
sourceview Enable GtkSourceView support
cssc valgrind Enable usage of dev-util/valgrind in tests
cvs server Enable server support
cvs2svn bazaar Support for dev-vcs/bzr
fossil json Enable the JSON API of Fossil's wiki
lineedit Enable line-editing with libedit or readline
sqlite Use the system SQLite instead of the bundled one
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!
gtk Include the gitview contrib tool
highlight GitWeb support for app-text/highlight
mediawiki Support pulling and pushing from MediaWiki
ppcsha1 Make use of a bundled routine that is optimized for the PPC arch
subversion Include git-svn for dev-vcs/subversion support
webdav Adds support for push'ing to HTTP/HTTPS repositories via DAV
git-annex android Building for Android
androidsplice Get TH splices for Android.
assistant Enable git-annex assistant and watch command
cryptohash Enable use of cryptohash for checksumming
desktop-notify Enable desktop environment notifications
dns Enable the haskell DNS library for DNS lookup
ekg Enable use of EKG to monitor git-annex as it runs.
feed Enable podcast feed support
pairing Enable pairing of git annex repositories
production Enable production build (slower build; faster binary)
quvi Enable use of quvi to download videos
s3 Enable Amazon S3 remote
tahoe Enable the tahoe special remote
tdfa Use regex-tdfa for wildcards
testsuite Embed the test suite into git-annex
webapp Enable git-annex webapp
webapp-secure Secure webapp
webdav Enable webdav remote
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
mercurial bugzilla Support bugzilla integration.
gpg Support signing with GnuPG.
tk Install dev-lang/tk for hgk script.
qct bazaar Support for dev-vcs/bzr
mercurial Support for dev-vcs/mercurial
monotone Support for dev-vcs/monotone
rabbitvcs cli Eanble console based frontend
diff Use for diff command dev-util/meld
gedit Enable plugin for app-editors/gedit
nautilus Enable extension for gnome-base/nautilus
thunar Enable extension for xfce-base/thunar
subversion ctypes-python Build and install Ctypes Python bindings
dso Enable runtime module search
extras Install extra scripts (examples, tools, hooks)
http Enable http support using net-libs/serf
webdav-neon Enable WebDAV support using net-libs/neon
webdav-serf Enable WebDAV support using net-libs/serf

games-action

Package Flag Description
awesomenauts bundled-libs Use the upstream provided bundled libraries.
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.
d1x-rebirth awe32 Enable AWE32 support
demo Use the demo data instead of the full game
linguas_de Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
mixer Enable mixer support
mpu401 Enable MPU401 music support
music Support for ingame music
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
d2x-rebirth demo Install games-action/descent2-demodata as well
linguas_de Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
music Support for ingame music
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
hotline-miami bundled-libs Use bundled libraries.
launcher Install qt launcher
minetest leveldb Enable LevelDB backend
luajit Use dev-lang/luajit instead of dev-lang/lua
redis Enable redis backend via dev-libs/hiredis
server Build minetest server
openlierox breakpad Compile with support for breakpad crash reporting system
solar2 bundled-libs Use the upstream provided bundled libraries.
super-hexagon bundled-libs Use the upstream provided bundled libraries.
supertuxkart fribidi Support for right-to-left languages
wiimote Support for wiimote input devices
swordandsworcery bundled-libs Use the upstream provided bundled libraries.
trine2 bundled-libs Use bundled libraries.
launcher Install gtk+ launcher

games-arcade

Package Flag Description
bomns editor enables building the level editor
burgerspace network Enable client-server support
commandergenius tremor Use media-libs/tremor as ogg decoder instead of media-libs/libvorbis
jumpnbump music Enable playing of background music
lbreakout2 themes Install additional themes
moleinvasion music Download and install the music files
performous midi Enable MIDI I/O support
songs Install a few demo songs
tools Install tools
webcam Enable Webcam support
slimevolley net Enable network support
smc music Download and install the music files
tuxanci physfs Use dev-games/physfs instead of dev-libs/libzip to load compressed data
sound Enable sound

games-board

Package Flag Description
chessdb tb4 Install 4 pieces table bases
cockatrice 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
grhino gtp Install the GTP (Go/Game Text Protocol) frontend
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
xboard default-font Install the default font that xboard uses
zippy Enable experimental zippy client

games-emulation

Package Flag Description
generator sdlaudio Enable SDL Audio
higan profile_accuracy Compile a binary optimized for accuracy
profile_balanced Compile a binary with balanced optimization
profile_performance Compile a binary optimized for performance
udev Enable udev based input
mednafen debugger Build with internal debugger
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 PyQt4 UI using games-emulation/m64py.
video-glide64mk2 Enable Glide64mk2 video plugin.
video-rice Enable Rice video plugin.
mupen64plus-core new-dynarec Enable new experimental dynamic recompiler implementation (only for x86 and arm)
osd Overlay emulator messages using on-screen-display
mupen64plus-video-glide64mk2 hires Support hi-resolution textures (requires dev-libs/boost)
pcsxr cdio Use libcdio for CD support
sdl Use SDL sound backend (other parts of SDL are used unconditionally)
snes9x netplay Enable playing ROMs over the network (not recommended)
xrandr Enable support for the X xrandr extension
vbam link Enable GBA linking functionality
yabause qt4 Use qt4 gui instead of gtk+
zsnes debug Enable the builtin debugger
pax_kernel Triggers a paxmarking of the binary

games-engines

Package Flag Description
frobtads tads2compiler Build TADS2 compiler
tads3compiler Build TADS3 compiler
odamex master Build master server target (advertises odamex server list)
odalaunch Build the wxwidgets based launcher.
portmidi Enable portmidi support.
server Build server target.
renpy development Install IDE for game developers and an empty game template
scummvm fluidsynth compile with support for fluidsynth
mpeg2 enable mpeg2 codec for cutscenes
solarus luajit Use LuaJIT instead of default Lua

games-fps

Package Flag Description
alienarena vidmode Link against x11-libs/libXxf86vm. Required for full-screen support.
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
doom-data doomsday Add wrapper to run it within doomsday
doom3 dedicated install only as a dedicated game server
roe Adds support for the Resurrection of Evil expansion
doomsday demo Install launcher dor doom1.wad from games-fps/doom-data
doom Install launcher for jdoom game
fluidsynth Build the FluidSynth sound driver
freedoom Install launcher for doom1.wad from games-fps/freefoom
heretic Install launcher for jheretic game
hexen Install launcher for jhexen game
resources Enable support for games-fps/doomsday-resources in jdoom launcher
snowberry Install Snowberry doomsday front-end
tools Build additional tools such as doomsday-shell, md2tool and texc
duke3d demo Install the demo files
pic disable optimized assembly code that is not PIC friendly
duke3d-data gog Extract the data from the GOG.com installer.
eduke32 demo Install games-fps/duke3d-demodata as well
gtk Compile with gtk launcher
offensive Include optional XXX texture pack (needs USE 'textures')
opl-musicpack Include optional OPL (AdLib) music pack
samples Install samples
sc55-musicpack Include optional Roland SC-55 music pack
server Compile with server support
textures Include optional high-resolution textures (needs USE 'opengl')
tools Build several tools for modding and development
vpx Enable support for WebM VP8 Codecs (needs USE 'opengl')
lsdldoom freedoom Install games-fps/freedoom wad file
net Enables network game support
shareware Install games-fps/doom-data for shareware wad file
nexuiz maps Install the community map pack
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)
quake3 mumble Adds player-location (positional audio) support to VoIP
teamarena Adds support for Team Arena expansion pack
voice Adds VoIP support
quake3-bin teamarena Adds support for Team Arena expansion pack
quake3-demo dedicated install only as a dedicated game serer
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)
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
unreal-tournament-goty S3TC Add the extra fancy textures to UT ... only works on certain cards (nvidia/ati/s3)
urbanterror server Build server target
warsow angelscript Enable AngelScript support
irc Enable IRC support
server Build server binaries additionally
worldofpadman maps Install extra maps (PadPack)

games-kids

Package Flag Description
crayon-physics bundled-libs Use the upstream provided bundled libraries.

games-misc

Package Flag Description
katawa-shoujo system-renpy Use games-engines/renpy instead of the bundled one (experimental)
little-inferno bundled-libs Use bundled libraries.
xcowsay fortune Installs the fortune-mod xcow binary

games-mud

Package Flag Description
tf atcp enable ATCP support.
gmcp enable GMCP support.
option102 enable telnet option 102 support.

games-puzzle

Package Flag Description
cuyo music Enable playing of background music
jag editor Install level editor
nightsky bundled-libs Use the upstream provided bundled libraries.
pingus music Enable playing of background music
tiny-and-big bundled-libs Use the upstream provided bundled libraries.
xlogical alt_gfx Use alternate graphics which are closer to the original Amiga version

games-roguelike

Package Flag Description
FTL bundled-libs Use bundled libraries.
angband sound Enable and install sounds
stone-soup ncurses Enable for console based build (uses ncurses).
tiles Enable for graphical (tiled) build.
tomenet server Compile server support

games-rpg

Package Flag Description
arx-fatalis-data gog Extract the data from the GOG.com installer.
arx-libertatis c++0x Build ROOT using the C++11 standard.
crash-reporter Build a dev-qt/qtgui-based tool that allows to submit crash information to the upstream backtracker.
debug Enable asserts and debug logging.
static Link libraries statically, currently only media-libs/glew
tools Build tools that can extract the game's data and save files.
unity-build Build everything in one big source file, allowing for faster build times and better optimizations at the cost of higher memory usage.
bastion bundled-libs Use the upstream provided bundled libraries.
daimonin-client music Install extra music
drascula sound Install optional audio files
dungeon-defenders bundled-libs Use the upstream provided bundled libraries.
eternal-lands-data bloodsuckermaps Will install Bloodsucker's Maps in place of the official map files.
music Adds in-game music.
sound Adds in-game sound effects.
grimrock bundled-libs Use bundled libraries.
kqlives cheats Enable cheating mode
nwn hou Install the Hordes of the Underdark expansion pack
sou Installs the Shadows of Undrentide expension pack
nwn-data hou Install the Hordes of the Underdark expansion pack
nowin For those people who cant grab the 1.2 gigs of data files from a windows partition
sou Installs the Shadows of Undrentide expension pack
sumwars tools Builds editor tools
to-the-moon bundled-libs Use bundled libraries
valyriatear editor Compile the Qt editor along with the game

games-simulation

Package Flag Description
corsix-th ffmpeg Use ffmpeg for playing in-game cutscenes.
midi Use SDL mixer and timidity for in-game music.
opengl Use OpenGL for rendering.
sdl Use SDL for rendering.
sound Use SDL mixer for in-game sound.
truetype Use high quality fonts.
flightgear dbus Enable screensaver DBus interaction
fgpanel Enables standalone lightweight 2D-panel rendering utility
jsbsim Enables JSBSim Flight Dynamics Model (default)
oldfdm Enables deprecated Flight Dynamics Models (LaRCsim, UIUC)
subversion Enables terrasync scenery downloader
udev Enables event-based Input devices through virtual/udev
utils Builds various utilities (fgpanel, terrasync, fgviewer among others)
yasim Enables YASim Flight Dynamics Model
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.
singularity music Install music files

games-sports

Package Flag Description
speed-dreams xrandr Enable support for the X xrandr extension
xmoto editor Depend on inkscape, scripts to convert svg to level (svg2lvl)

games-strategy

Package Flag Description
0ad editor Include Atlas scenario editor projects
lobby Enable the use of net-libs/gloox and the multiplayer lobby
dark-oberon fmod Add sound support (fmod)
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
ggz Add support for GGZ Gaming Zone
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
freeorion cg Add support for NVIDIA toolkit plugin
freesynd devtools Build development tools
heroes3 maps Installs optional map data
music Installs optional music data
sounds Installs optional sound data
ja2-stracciatella editor Adds necessary file to run the editor
linguas_ru_gold Support for russian gold ja2 version
liquidwar6 doc Convert the info pages to html
gles2 Enable OpenGL ES 2.0 support
gtk Used to display error/critical messages
maps Install extra maps
ogg Enable mod-ogg via media-libs/sdl-mixer (currently the only sound provider)
readline Enable interactive script shell for hacking
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.
openra cg NVIDIA toolkit plugin
tools Install some development tools such as editor.
s25rttr glfw Compile another video driver based on media-libs/glfw.
seven-kingdoms network Enable support for multiplayer via media-libs/sdl-net
ufo-ai editor Build map editor
uqm music download and install music files (large)
remix download and install music remix files (large)
voice download and install voice files (large)
warzone2100 qt4 Use qt-gui/qt-opengl for backend rendering instead of sdl
wesnoth server Enable compilation of server

games-util

Package Flag Description
gslist web Enable the web interface
pyfa graph Enable support for graphs

gnome-base

Package Flag Description
gconf ldap Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry."
orbit Use gnome-base/orbit for IPC, same as in gconf-2.x
gdm audit Enable support for sys-process/audit
consolekit Allow proper handling of removable media according to who is actually present on the machine.
dmx Enables Distributed Multihead X (DMX) support
fprint Enables experimental fingerprint authentication using sys-auth/fprintd
plymouth Enable support for smooth transition from sys-boot/plymouth
remote Enables support for secure remote connections
gnome classic Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode
extras Install additional GNOME applications
gnome-applets cpufreq Build cpu frequency scaling monitor applet
gnome-control-center colord Support color management using x11-misc/colord
gnome-online-accounts Enable configuration panel for net-libs/gnome-online-accounts accounts
i18n Enable support for enhanced input methods through app-i18n/ibus
socialweb Add support for desktop background images from Flickr using net-libs/libsocialweb
gnome-desktop license-docs Install help files documenting GNOME's licenses
gnome-extra-apps games Install Gnome Games
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 automount Use gnome-base/gvfs[gdu] for automounting of drives in nautilus
gnome-shell Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode
gnome-panel bonobo Enable Bonobo compatibility modules for applets still not ported to DBUS.
gnome-session gconf Optional support for gnome-base/gconf configuration storage system
gnome-settings-daemon colord Support color management using x11-misc/colord
i18n Enable support for enhanced input methods through app-i18n/ibus
openrc-force Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
packagekit Enable support for the distro-neutral package manager GUI app-admin/packagekit
short-touchpad-timeout Change the touchpad timeout so that it's effective for fast typists
gnome-shell i18n Enable support for enhanced input methods through app-i18n/ibus
openrc-force Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
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
fuse Enables fuse mount points in $HOME/.gvfs for legacy application access
gdu Enable sys-apps/gnome-disk-utility integration (DEPRECATED, use USE flag "udisks" instead)
gnome-online-accounts Enable configuration panel for net-libs/gnome-online-accounts accounts
http Enable the HTTP/DAV backend using net-libs/libsoup-gnome
libsecret Enable app-crypt/libsecret support to store login credentials.
udev Enable udev base replacement code for cdda feature
libglade tools Install libglade-convert Python script.
libgnome-keyring vala Enable bindings for dev-lang/vala
libgnomecanvas glade Enable glade support
libgtop introspection Use dev-libs/gobject-introspection for introspection
librsvg introspection Use dev-libs/gobject-introspection for introspection
tools Build svg viewer tool
vala Enable bindings for dev-lang/vala
nautilus packagekit Use packagekit to search for programs to open unknown file types
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
tracker Add support for app-misc/tracker search
orbit pic Force libname-server-2 to be built as PIC; needed on hardened systems

gnome-extra

Package Flag Description
avant-window-navigator gconf Enable GConf as configuration backend
vala Enable installation of dev-lang/vala binding
avant-window-navigator-extras gconf Enable GConf as configuration backend
cinnamon l10n Pull in gnome-extra/cinnamon-translations for localization support
cinnamon-control-center colord Support color management using x11-misc/colord
socialweb Add support for desktop background images from Flickr using net-libs/libsocialweb
cinnamon-session gconf Support old autostart conditions which use gnome-base/gconf
cinnamon-settings-daemon colord Support color management using x11-misc/colord
evolution-data-server api-doc-extras Build documentation for private APIs
gnome-online-accounts Enable using net-libs/gnome-online-accounts for authorization
vala Build dev-lang/vala bindings
weather Enable optional weather calendar support
file-browser-applet gtkhotkey Enable hotkey support via x11-libs/gtkhotkey
gdesklets-core dbus Enable gDesklets Controls to use DBus
gnome-boxes usbredir Use sys-apps/usbredir to redirect USB devices to another machine over TCP
gnome-color-manager clutter Use media-libs/clutter to render color gamut representations
packagekit Enable support for the distro-neutral package manager GUI app-admin/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
python Add support for python plugins"
taglib Add metadata support for ID3, Vorbis, FLAC and APE
gnome-do-plugins banshee Enables the Banshee (media-sound/banshee) plugin
gnome-dvb-daemon totem Build a plugin for media-video/totem
vala Add support for dev-lang/vala
gnome-games artworkextra Installs extra artwork for various games
gnome-media twolame Allow encoding MPEG Audio Layer 2 (MP2) files using twolame
gnome-packagekit systemd Use sys-apps/systemd instead of sys-auth/consolekit for rebooting
gnome-power-manager applet Build battery monitor applet
gnome-screensaver systemd Support sys-apps/systemd's logind
gnome-system-monitor systemd Display sys-apps/systemd metadata, e.g. unit names, for running processes
gnome-utils bonobo Enable applets (gdict one) still not ported to DBUS, requiring deprecated bonobo support in gnome-panel.
gucharmap vala Enable bindings for dev-lang/vala
libgda bindist Disable support for dev-db/firebird database which is not GPL compatible.
canvas Enable support for x11-libs/goocanvas
http Enable embedded net-libs/libsoup based server
json Enable support for JSON format
libsecret Enable app-crypt/libsecret support to store login credentials
mdb Enable support for Microsoft Access database using app-office/mdbtools
reports Install tools for generating graphical reports
sourceview Enable support for x11-libs/gtksourceview
libgsf gtk Enable use of gdk in thumbnailer
introspection Use dev-libs/gobject-introspection for introspection
nautilus-actions deprecated Enable deprecated functions
nautilus-sendto gajim Enables support for net-im/gajim
mail Enables support for mailto using gnome-extra/evolution-data-server
pidgin Enables support for net-im/pidgin
nemo introspection Use dev-libs/gobject-introspection for introspection
l10n Pull in gnome-extra/cinnamon-translations for localization support
packagekit Use packagekit to search for programs to open unknown file types
tracker Add support for app-misc/tracker search
nm-applet gconf Build tool for migrating gconf settings from nm-applet-0.8.x
modemmanager Enable support for mobile broadband devices using net-misc/modemmanager
panflute mpd Enable MPD support
sushi office Support viewing file formats such as generated by app-office/libreoffice
synapse plugins Build support for plugins using librest
zeitgeist Add support for Zeitgeist event tracking system
zeitgeist datahub Use build datahub for passive event injection
downloads-monitor Monitor the XDG_DOWNLOAD_DIRECTORY
extensions Use gnome-extra/zeitgeist-extentions to enhance the internal routines
fts Enable the full text search extension
plugins Use gnome-extra/zeitgeist-datasources to enable numerous packages to inject events
sql-debug Enable SQL debugging
telepathy Enable telepathy framework as data source
zeitgeist-datahub download Monitor XDG download directory
telepathy Telepathy logging support for 1-to-1 chats, calls and file transfers
zeitgeist-datasources bzr Zeitgeist plugin for dev-vcs/bzr as data source
chromium Zeitgeist plugin for www-client/chromium as data source
emacs Zeitgeist plugin for emacs as data source
firefox Zeitgeist plugin for www-client/firefox as data source
geany Zeitgeist plugin for dev-util/geany as data source
telepathy Zeitgeist plugin for telepathy framework as data source
thunderbird Zeitgeist plugin for mail-client/thunderbird as data source
tomboy Zeitgeist plugin for app-misc/tomboy as data source
vim Zeitgeist plugin for vim as data source
xchat Zeitgeist plugin for net-irc/xchat-gnome as data source
zeitgeist-extensions fts Enable the full text search
geolocation Add the physical location of the computer at the moment when events are inserted
memprofile Memory profiling extension
sqldebug debug zeitgeists sql statements
tracker Notify Tracker on events
zenity compat Installs gdialog for compatibility with older shell scripts which uses dev-lang/perl

gnustep-apps

Package Flag Description
gemas projectcenter Build and install plugin for gnustep-apps/projectcenter
gnumail emoticon Enable extra Emoticon Bundle to see smiley's in e-mail messages
gworkspace gwmetadata Enable the metadata indexing and searching system

gnustep-base

Package Flag Description
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

gpe-base

Package Flag Description
gpe games Builds and installs GPE games.

kde-base

Package Flag Description
ark archive Enable support for a variety of archive formats through libarchive
baloo alternatekcm Use the alternate Systemsettings module by Lindsay Mathieson for better configurability
cantor R Enable dev-lang/R backend support
analitza Enable kde-base/analitza backend support
qalculate Enable sci-libs/libqalculate backend support
dolphin thumbnail Enables video thumbnails generation for kde-base/dolphin file manager.
dolphin-plugins bazaar Enable support for the bazaar VCS
mercurial Enable support for the mercurial VCS
gwenview kipi Support for the KDE Image Plugin Interface.
kaccessible speechd Enable support for the speech-dispatcher speech synthesizer
kactivities nepomuk Enable Nepomuk based semantic desktop support (deprecated)
kalzium editor Enable the embedded molecule editor/viewer
solver Enable the equation solver
kde-meta kdepim Pull in KDE PIM
sdk Pull in developer-specific meta-packages
kdeartwork-kscreensaver eigen Enable various arithmetic screensavers which use Eigen2 for computations.
kexiv2 Enable image rotation based on exif tags with libkexiv2.
kdebase-data wallpapers Install the KDE wallpapers
kdebase-kioslaves sftp Enable SFTP protocol support using net-libs/libssh
kdebase-meta wallpapers Install the KDE wallpapers
kdebase-runtime-meta crash-reporter Builds a gui tool to submit crash information to the upstream backtracker
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
kdebase-startkde wallpapers Install the KDE wallpapers
kdebindings-meta csharp Enable C# language bindings for KDE and Qt
kdelibs nepomuk Enable Nepomuk based semantic desktop support (deprecated)
opengl Enable OpenGL support for Plasma (GLApplet)
kdenetwork-meta ppp Enable support for net-dialup/ppp.
kdepim-meta akonadi Enables support for kde-base/akonadi
kdepim-runtime facebook Facebook service integration via net-libs/libkfbapi
google Google service integration via net-libs/libkgapi
kdepimlibs prison Enable support for QRcodes in contacts
kdeplasma-addons attica Enable support for dev-libs/libattica
desktopglobe Enable Desktop Globe wallpaper using kde-base/marble
fcitx Use fcitx input method via app-i18n/fcitx
ibus Use ibus input method via app-i18n/ibus
json Enable JSON support via dev-libs/qjson
kdepim KDE PIM integration via kde-base/kdepimlibs
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
oauth Enable OAuth support via dev-libs/qoauth
qalculate Enable Qalculate runner using sci-libs/libqalculate
qwt Enable applets that use x11-libs/qwt:5
scim Enable applets that use app-i18n/scim
kdeutils-meta floppy Install kde-base/kfloppy to format and create DOS or ext2fs filesystems in a floppy.
kdm consolekit Enables support for authorization using consolekit
kfilemetadata epub Adds support for reading EPUB ebook metadata
mobi Adds support for reading MOBI ebook metadata
kget bittorrent Enable bittorrent transfer plugin through net-libs/libktorrent
gpg Support for signature verificatopm by QGpgME via kde-base/kdepimlibs
mms Enable MMS (Microsoft Media Server) plugin through media-libs/libmms
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
webkit Enable KdeWebkit browser plugin using kde-misc/kwebkitpart
kig scripting Support Python scripting
kimono akonadi Compile bindings for Akonadi
nepomuk Compile bindings for Nepomuk
plasma Compile bindings for KDE's Plasma
klipper prison Enable support for barcodes/QRcodes
kmix canberra Enable sound event support using media-libs/libcanberra
konqueror bookmarks Add dependency on bookmark package.
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.
msn Enable "Windows live messenger" protocol support.
nowlistening Shows song you currently listen to in your status/etc. Bindings for many players.
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
skype Enable Skype protocol handler (not fully functional yet).
sms Enable SMS sendinge functionality.
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 ;])
yahoo Enable yahoo protocol support.
zeroconf Enable Link-Local Messaging via the bonjour protocol.
korundum akonadi Compile bindings for Akonadi
kate Compile bindings for KDE Advanced Text Editor
nepomuk Compile bindings for Nepomuk
okular Compile bindings for kde-base/okular
krdc rdesktop Enable runtime dependency for net-misc/rdesktop
telepathy Enable desktop sharing through a telepathy client
krfb telepathy Enable desktop sharing through a telepathy client
ksnapshot kipi Support for the KDE Image Plugin Interface.
kstars fits Enable support for the FITS image format through cfitsio
indi Enable support for Astronomical control library using libindi
kwalletd gpg Support wallets with GnuPG encryption additionally to default blowfish-encrypted file
kwin gles Enable support for GLES.
libplasmaclock kdepim KDE PIM integration via kde-base/kdepimlibs
lokalize nepomuk Enable Nepomuk based semantic desktop support (deprecated)
marble designer-plugin Enable designer plugin
shapefile Enable support for ESRI shapefiles
zip Enable support for reading and displaying .kmz files
nepomuk-core epub Adds support for reading EPUB ebook metadata
migrator Installs a kde-base/baloo migration tool
okular chm Enable support for Microsoft Compiled HTML Help files
dpi DPI detection support for PDF rendering via x11-libs/libkscreen
ebook Add E-Book support
mobi Add mobipocket support
oxygen-icons bindist Additionally install the svg sources of the bitmap icons (needed for redistribution)
perlkde akonadi Compile bindings for Akonadi
attica Compile bindings for dev-libs/libattica
kate Compile bindings for KDE Advanced Text Editor
nepomuk Compile bindings for Nepomuk
okular Compile bindings for kde-base/okular
perlqt declarative Compile bindings for dev-qt/qtdeclarative.
multimedia Compile bindings for dev-qt/qtmultimedia.
phonon Compile bindings for Phonon.
qimageblitz Compile bindings for media-libs/qimageblitz.
qscintilla Compile bindings for x11-libs/qscintilla.
qthelp Compile bindings for QtHelp from dev-qt/qthelp.
qwt Compile bindings for x11-libs/qwt.
webkit Compile bindings for dev-qt/qtwebkit.
plasma-workspace json Enable JSON support via dev-libs/qjson
kdepim KDE PIM integration via kde-base/kdepimlibs
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
qalculate Enable Qalculate runner using sci-libs/libqalculate
powerdevil pm-utils Adds support for suspend/resume the system through sys-power/pm-utils
poxml extras Build po2xml and swappo tools
pykde4 akonadi Compile bindings for Akonadi
nepomuk Compile bindings for Nepomuk
semantic-desktop Enables Nepomuk and Soprano python language bindings
qtruby declarative Compile bindings for dev-qt/qtdeclarative.
phonon Compile bindings for Phonon.
qscintilla Compile bindings for x11-libs/qscintilla.
qwt Compile bindings for x11-libs/qwt.
webkit Compile bindings for dev-qt/qtwebkit.
qyoto phonon Compile bindings for Phonon.
qscintilla Compile bindings for x11-libs/qscintilla.
webkit Compile bindings for dev-qt/qtwebkit.
smokekde akonadi Compile bindings for Akonadi
attica Compile bindings for dev-libs/libattica
kate Compile bindings for KDE Advanced Text Editor
nepomuk Compile bindings for Nepomuk
okular Compile bindings for kde-base/okular
smokeqt declarative Compile bindings for dev-qt/qtdeclarative.
multimedia Compile bindings for dev-qt/qtmultimedia.
phonon Compile bindings for Phonon.
qimageblitz Compile bindings for media-libs/qimageblitz.
qscintilla Compile bindings for x11-libs/qscintilla.
qthelp Compile bindings for QtHelp from dev-qt/qthelp.
qwt Compile bindings for x11-libs/qwt.
webkit Compile bindings for dev-qt/qtwebkit.
step qalculate Enable the libqalculate library for unit conversion
systemsettings nepomuk Enable Nepomuk based semantic desktop support (deprecated)

kde-misc

Package Flag Description
kcm-grub2 hwinfo Used to work out supported framebuffer resolutions
imagemagick Create splash images compatible with GRUB2
packagekit Add support for packagekit integration
kepas oscar Enables ICQ (AIM) support.
krusader bookmarks Add dependency on bookmark package.
networkmanagement openconnect Build support for the OpenConnect VPN client
plasma-nm modemmanager Enable support for mobile broadband devices
openconnect Build support for the OpenConnect VPN client
tellico addressbook Add support for kdepim addressbook (kabc)
nepomuk Enable Nepomuk based semantic desktop support (deprecated)

lxde-base

Package Flag Description
lxdm consolekit Enables support for authorization using consolekit
gtk3 Use GTK+3 instead of 2

lxqt-base

Package Flag Description
lxqt-meta icons Install lxde-base/lxde-icon-theme icon theme
lightdm Install x11-misc/lightdm display manager
lximage Install media-gfx/lximage-qt image viewer
minimal Do not install x11-wm/openbox window manager
powermanagement Install lxqt-base/lxqt-powermanagement package
sddm Install x11-misc/sddm display manager
ssh-askpass Install net-misc/lxqt-openssh-askpass user password prompt tool
lxqt-panel clock Build clock plugin
colorpicker Build colorpicker plugin
cpuload Build cpuload plugin
desktopswitch Build desktopswitch 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
screensaver Build screensaver plugin
sensors Build sensors plugin
showdesktop Build showdesktop plugin
sysstat Build sysstat plugin
taskbar Build taskbar plugin
teatime Build teatime plugin
tray Build tray plugin
volume Build volume plugin
worldclock Build worldclock plugin

mail-client

Package Flag Description
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 app-editors/pico and/or mail-client/pine
passfile Adds support for caching passwords into a file between sessions
smime Enable support for S/MIME
topal Enable support for net-mail/topal
balsa crypt Adds support for GnuPG encryption
gtkspell Use gtkspell for dictionary support
rubrica Adds support for app-office/rubrica addressbook
claws-mail archive Enable archiving plugin
bogofilter Build mail-filter/bogofilter plugin
dillo Enables support for inline HTTP email viewing with a plugin (which depends on the www-client/dillo browser)
gdata Enable plugin for access to Google data providers
gtk3 Build support for GTK+3
libcanberra Enable sound notification in connection with USE=notification
libindicate Enable notification through DBUS in connection with USE=notification
libnotify Enable notification on the desktop in connection with USE=notification
notification Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify
pgp Enable PGP 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 bogofilter Build mail-filter/bogofilter plugin
clutter Build with clutter support for animation effects
crypt Enable GPG encryption support using app-crypt/gnupg and app-crypt/pinentry
highlight Enable text highlighting plugin
ldap Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap
map Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain
networkmanager Allows Evolution to automagically toggle online/offline mode by talking to net-misc/networkmanager and getting the current network state
spamassassin Build mail-filter/spamassassin plugin
weather Enable optional weather calendar support
mail-notification sylpheed Enable support for MH mailboxes used by mail-client/sylpheed
mutt gpg Enable support for app-crypt/gpgme
pop Enable support for pop
sidebar Use the vanilla tree + sidebar patch
smime Enable support for smime
smtp Enable support for smtp
tokyocabinet Enable tokyocabinet database backend for header caching
nail kerberos If network is enabled, this adds support for GSSAPI login on IMAP through virtual/kerberos.
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.
novell-groupwise-client novell-jre Use the Java Runtime Environment provided by Novell
squirrelmail filter Enable mail-filter/amavisd-new filtering
sylpheed oniguruma Use dev-libs/oniguruma for regular expression
thunderbird bindist Disable official Thunderbird branding (icons, name) which are not binary-redistributable according to upstream.
crypt Enable encryption support with enigmail
custom-optimization Fine-tune custom compiler optimizations (-Os, -O0, -O1, -O2, -O3)
gconf Enable gnome2 gconf support
ipc Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
lightning Enable calendar support
minimal Remove the software development kit and headers
mozdom Enable Mozilla's DOM inspector
system-cairo Use the system-wide x11-libs/cairo Use system cairo instead of bundled.
system-icu Use the system-wide dev-libs/icu Use system icu instead of bundled.
system-jpeg Use the system-wide media-libs/libjpeg-turbo Use system jpeg instead of bundled.
system-sqlite Use the system-wide dev-db/sqlite installation with secure-delete enabled
thunderbird-bin crashreporter Enable crash reporter for bugs
trojita password Store passwords securely via dev-libs/qtkeychain

mail-filter

Package Flag Description
MailScanner exim Set mail-mta 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
spamassassin Add support for mail-filter/spamassassin
zmq Add support for zeromq sockets
ask procmail Adds support for mail-filter/procmail
assp spf Adds support for Sender Policy Framework
srs Adds support for Sender Rewriting Scheme
bogofilter tokyocabinet Enable Tokyo Cabinet database support
clamassassin clamd Use the app-antivirus/clamav daemon for virus checking
subject-rewrite Adds support for subject rewriting
dcc rrdtool Enable net-analyzer/rrdtool interface scripts
dspam daemon Enable support for DSPAM to run in --daemon mode
debug Enable debugging support (don't enable this unless something needs testing!)
domain-scale Build for domain scale setups - puts data to $HOME/data/domain.com/user
hash Enable support for the file-orientated hash driver
large-scale Build for large scale setups - puts data to $HOME/data/u/s/user
small-scale Build for small scale setups - puts data to $HOME/data/user
user-homedirs Build with user homedir support
virtual-users Build with virtual-users support
libmilter poll Use poll instead of select
maildrop authlib Add courier-authlib 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.
sasl Used to authenticate to a LDAP server in various ways if required.
unbound Use the unbound dnssec library to perform DKIM DNS queries.
postfwd tools Install additional tools for testing postfwd
postgrey targrey Enables the targrey patch
qmail-scanner spamassassin Build faster mail-filter/spamassassin checks into qmail-scanner
spamassassin qmail Build qmail functionality and docs
spamassassin-fuzzyocr amavis Enable support for mail-filter/amavisd-new
gocr Enable support for the gocr OCR engine
logrotate Install support files for app-admin/logrotate
ocrad Enable support for the ocrad OCR engine
tesseract Enable support for the tesseract OCR engine
spamdyke tls Enables TLS protocol for spamdyke
zdkimfilter debug Log process and signal information. Also leave the child process running for gdb examination.
mysql MySQL client based statistics based storage.
opendbx An alternate statistics based storage engine.

mail-mta

Package Flag Description
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 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 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
noauthcram If you do NOT want AUTHCRAM to be available
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
vda Add support for virtual delivery agent quota enforcing
qmail-ldap cluster Enable this if you want to have cluster support in qmail-ldap
gencertdaily Generate SSL certificates daily instead of hourly
highvolume Prepare qmail for high volume servers
rfc2307 Add support for RFC2307 compliant uid/gid attributes
rfc822 Add support for RFC822 compliant mail attributes
qpsmtpd postfix create user with permissions for proper postfix interaction
ssmtp mta Install symlinks for sendmail-compatible MTA.

mate-base

Package Flag Description
caja mate Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.
unique Enable single instance support using dev-libs/libunique.
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.
themes Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time.
mate-file-manager mate Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.
unique Enable single instance support using dev-libs/libunique.
mate-keyring gpg-agent Include GPG agent in mate-keyring.
ssh-agent Include SSH agent in mate-keyring.

mate-extra

Package Flag Description
caja-extensions 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.
mate-file-manager-sendto gajim Enables support for net-im/gajim
mail Enables support for mailto using gnome-extra/evolution-data-server
pidgin Enables support for net-im/pidgin
mate-media twolame Bring in twolame gstreamer support
mate-power-manager applet Enable building of the MATE applet.
man Build power manager's man page.
unique Enable single instance support using dev-libs/libunique.
mate-screensaver consolekit Enable support for sys-auth/consolkekit
mate-utils applet Enable the mate dictionary applet

media-fonts

Package Flag Description
culmus ancient Install ancient semitic scripts
fancy Install fancy fonts
fontforge Use media-gfx/fontforge to build fonts from source
taamey Install taamey fonts
culmus-ancient fontforge Use media-gfx/fontforge to build fonts from source
dejavu fontforge Use media-gfx/fontforge to build fonts from source
intlfonts bdf Installs BDF fonts in addition to PCF
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
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)
pcf Install Portable Compiled Font (PCF) (required for X11)
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)
raw-font-data Install RAW font data which should be compatible with most UNIX systems (you don't need this on linux)
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

Package Flag Description
album plugins Install optional plugins
themes Install optional themes
assimp boost Build assimp with boost support
samples Build viewer library
tools Build assimp tool binary
asymptote boehm-gc Enables using the Boehm-Demers-Weiser conservative garbage collector
offscreen Enables off-screen rendering
sigsegv Enables using dev-libs/libsigsegv
blender boost Enable features depending on boost.
bullet Enable Bullet (Physics Engine).
collada Add support for Collada interchange format through media-libs/opencollada.
colorio Enable OpenColorIO color management.
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.
ndof Enable NDOF input devices (SpaceNavigator and friends).
openimageio Enable OpenImageIO Support
opennl Enable use of Open Numerical Library
player Build the Blender Player. THis requires the Game engine.
redcode This flag add support for RED CODE camera digital format (5K HD images *.r3d) - EXPERIMENTAL.
brlcad benchmarks Run benchmarks during test phase (need test option enabled)
comix rar Pulls app-arch/unrar for rar file support
darktable colord Support color management using x11-misc/colord
flickr Add support for uploading photos to flickr
geo Enable geotagging support
graphicsmagick Use media-gfx/graphicsmagick for image importing
opencl Enable opencl support
pax_kernel Triggers paxmarking of main darktable binary
rawspeed Enable the rawspeed backend
slideshow Build the opengl slideshow viewer
squish Enable thumbnail compression via libsquish
web-services Add support for uploading photos to facebook and picasa
webp Enable WebP export support
digikam addressbook Add support for kdepim
linguas_ha Hausa translation
linguas_mi Maori translation
linguas_ven Venda translation
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
themedesigner Build the digikam theme designer
thumbnails Enable thumbnails database support
video Pull in mplayerthumbs to enable video thumbnails
enblend gpu GPU support for Enblend
image-cache allow for processing of large images
eog-plugins flickr Enable uploading to Flickr
map Enable world map display using media-libs/libchamplain
picasa Enable uploading to Google's Picasa Web Albums
exact-image swig Adds Swig support dev-lang/swig
exiv2 contrib Build additional contrib components
f-spot flickr Enable building of the Flickr exported.
fbida X Install the Motif based image viewer "ida"
fbcon Install the framebuffer image viewer "fbi"
webp Enable support for the WebP image format
fim dia Enable DIA file support via app-office/dia
graphicsmagick Enable GraphicsMagick library support
imagemagick Use convert from media-gfx/imagemagick as fallback file opener
xfig Enable FIG file support via media-gfx/xfig
fontforge cjk Controls whether fontforge understands the gb12345 encoding and installs cidmap package to edit CID-keyed fonts
pango Enable pango font rendering
pasteafter Controls whether fontforge has a paste after command (Useful for making words?). This is kind of fun, but it isn't useful for normal fonts.
tilepath Controls whether fontforge has a tile path command (a variant of expand stroke) This is useful for very decorative fonts, most people won't want it.
truetype-debugger Enable truetype debugger in fontforge
type3 Build in support for type3/svg fonts containing multilayered drawing with strokes, fills, images, etc. Type3 fonts are only supported by postscript printers (not by most windowing displays). They are capable of more exotic images than normal fonts but require much more effort to support.
fotowall webcam Enable webcam support
freewrl glew Enable glew extensions
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
gimp smp Enable support for multiprocessors
gmic graphicsmagick Enable support for many common image file formats using the GraphicsMagick++ library
opencv Enable support for webcams using the OpenCV library
graphicsmagick fpx Enable FlashPix support with media-libs/libfpx
modules Compile graphicsmagick with dynamically loadable modules
q16 Set storage quantum size to 16 (~2*memory)
q32 Set storage quantum size to 32 (~5*memory)
webp Enable support for webp image format
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
gdk-pixbuf Enables gdk-pixbuf2 plugin
gtk Enables gtk+ output plugin -Tgtk (needs cairo)
gts Enables support for gts
lasi Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)
qt4 Builds gvedit front-end
gthumb http Enable webservice integration through net-libs/libsoup
json Compile code that uses the libjson-glib library
libsecret Enable libsecret support to store login credentials
slideshow Enable slideshow plugin
webp Enable support for webp image format
hugin sift automatically align images with media-gfx/autopano-sift or media-gfx/autopano-sift-C
imagemagick autotrace Use media-gfx/autotrace to convert bitmaps into vector graphics
corefonts Use media-fonts/corefonts which is required by some commands
fpx Enable media-libs/libfpx support
hdri enable High Dynamic Range Images formats
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
q64 Set quantum depth value to 64
q8 Set quantum depth value to 8
webp Enable webp image format support using media-libs/libwebp
imageworsener webp enable webp image format support
inkscape dia pull in app-office/dia for dia import extension
inkjar enables support for OpenOffice.org SVG jar files
iscan-plugin-gt-f500 minimal Install the firmware only, and not the plugin.
jpeg2ps metric Default to A4 paper size
k3d 3ds Enable support for 3D Studio models
cuda Use nvidia cuda toolkit for speeding up computations
gts Add Support for the GNU Triangulated Surface Library sci-libs/gts
kphotoalbum geolocation Add support for kde-base/marble
kipi Support for the KDE Image Plugin Interface
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
librecad tools Build additional tool programs
nip2 goffice use x11-libs/goffice to show plots
nomacs webp Build support for WEBP image format
nvidia-texture-tools cg Enable NVIDIA C graphics compiler toolkit plug-in
cuda Enable NVIDIA CUDA toolkit support
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
pngcrush system-libs Use libpng and libz provided by system
postr gnome2 Install plugin for =gnome-base/nautilus-2*. Warning: will make =nautilus-3* crash.
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
pstoedit emf Enable media-libs/libemf support
flash Enable media-libs/ming SWF support
pptx Enable support for generating PowerPoint pptx files
qiv magic Use libmagic to determine mimetypes
qiviewer webp Build support for WEBP image format
splashutils fbcondecor Support for the fbcondecor kernel patch.
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 blender install media-gfx/blender scripts

media-libs

Package Flag Description
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.
alure dumb Enable media-libs/dumb module library support
fluidsynth Enables Fluidsynth MIDI software synthesis
aubio double-precision Compile in double precision mode.
avidemux-core aften Enable A/52 (AC-3) audio encoder support.
amr Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
system-ffmpeg Use the ffmpeg provided by the system.
vaapi Enable VAAPI (Video Acceleration API) for hardware decoding.
avidemux-plugins aften Enable A/52 (AC-3) audio encoder support.
amr Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
faac Enable free MPEG-4 audio codecs support via media-libs/faac.
faad Enable AAC audio decoding library support via media-libs/faad2.
fribidi Enable unicode bidirectional algorithm support via dev-libs/fribidi.
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.
babl introspection Use dev-libs/gobject-introspection for introspection
vala Enable bindings for dev-lang/vala
cal3d 16bit-indices Enables use of 16bit indices
chromaprint tools Build and install fpcalc and fpcollect tools
clutter gtk Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend
cogl gles2 Enable OpenGL ES 2.0 support
pango Build cogl-pango library for x11-libs/pango integration
coin simage Texture loading via media-libs/simage library
devil allegro Add support for Allegro
nvtt Add support for dev-util/nvidia-texture-tools
edje cache Enable caching
elementary quicklaunch Enable quick-launch support
emotion vlc Enable support for the media-video/vlc player backend
esdl image Enable image support
ethumb emotion Add support for media-libs/emotion
evas bmp Support windows bitmap (bmp) image loader
eet Support dev-libs/eet
gles Enable gles flavor of gl instead of standard
ico Support windows icon (ico) image loader
ppm Support PPM image loader
psd Support PSD image loader
tga Support tga image loader
wayland Add support for dev-libs/wayland
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
freeglut mpx Enable support for multi-pointer-X. One pointer for each pointer device.
freetype adobe-cff Use Adobe CFF as default font-renderer
auto-hinter Use the unpatented auto-hinter instead of the (recommended) TrueType bytecode interpreter
bzip2 Support bzip2 compressed PCF fonts.
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 audacious Build Audacious plugin
avx Adds support for Advanced Vector Extensions instructions
forcefpu Disable assembly code
plugdouble Build plugins in double precision mode (default is float)
sse3 Enable SSE3 support
sse4 Enable SSE4 support
gegl introspection Use dev-libs/gobject-introspection for introspection.
lensfun Enable support for media-libs/lensfun.
umfpack Enable sparse solving via sci-libs/umfpack.
vala Enable bindings for dev-lang/vala
giflib rle Build converters for RLE format (utah raster toolkit)
glfw egl Use EGL instead of GLX for GL context creation
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
vala Generate bindings for dev-lang/vala
gst-plugins-bad egl Enable EGL support
gst-plugins-base ivorbis Enable integer based vorbis decoder.
pango Enable pango GStreamer plugin
gst-rtsp-server introspection Use dev-libs/gobject-introspection for introspection
vala Add support for dev-lang/vala
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
harfbuzz glib Compile with GLib Unicode support
graphite Use graphite to render complex non-Roman writing systems
jbig2enc webp Add support for WEBP image format
leptonica utils Install command-line utilities
webp Adds support for the WebP image format
libass enca Enables support for charset discovery and conversion.
harfbuzz Enables OpenType shaping via media-libs/harfbuzz.
libbluray aacs Add support for decryption of AACS
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.
libchamplain introspection Use dev-libs/gobject-introspection for introspection
vala Generate bindings for dev-lang/vala
libextractor archive Enable archive support using app-arch/libarchive
gsf Enable OLE2 (MS Office) plug-in support using gnome-base/libgsf
magic Enable magic support using sys-apps/file
midi Enable MIDI support through media-libs/libsmf
libggi vis Enables sparc vis support for libggi
libgnome-media-profiles twolame Allow encoding MPEG Audio Layer 2 (MP2) files using twolame
libgphoto2 serial Enable serial port support
libgpod gtk Enable ArtworkDB support
liblastfm fingerprint Build the lastfm-fingerprint library
libmp4v2 utils Install command-line utilities
libomxil-bellagio audioeffects enable audio volume/mixer effects components
clocksrc enable clock component
videoscheduler enable xvideosink video scheduler
libpng apng support unofficial APNG (Animated PNG) spec
libpostproc mmxext Enable mmx2 support.
pic Force shared libraries to be built as PIC (this is slower).
libquicktime schroedinger Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec)
libraw demosaic Enable support for external interpolation algorithms
libsdl joystick Control joystick support (disable at your own risk)
ps3 Build the PS3 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)
libsdl2 fusionsound use FusionSound audio driver
gles include OpenGL ES support
haptic Enable the haptic (force feedback) subsystem
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)
libvpx postproc Enable additional post processing filters
sse3 Enable optimization for SSE3 capable chips
sse4_1 Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
ssse3 faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
libwebp experimental Build with -DWEBP_EXPERIMENTAL_FEATURES
swap-16bit-csp Enable byte swapping for 16 bit colorspace
lilv dyn-manifest Add LV2 Dynamic Manifest support. See http://lv2plug.in/ns/ext/dynmanifest/
lv2 plugins Enables examples plugins.
mash introspection Use dev-libs/gobject-introspection for introspection
mediastreamer amr Use of AMR Narrow Band codec plugin
filters Enable compilation of filters
g726 Support g726 codec
g729 Use g726 codec plugin
ilbc Use of iLBC (RFC3951) codec plugin
ntp-timestamp Turn on NTP timestamping on received packet
opus Enable opus codec support
ortp Enable usage of net-libs/ortp
pcap Enable usage of net-libs/libpcap
silk Use silk (skype protocol) codec plugin
video Enable video support
memphis introspection Use dev-libs/gobject-introspection for introspection
vala Add support for Vala
mesa bindist Disable patent-encumbered ARB_texture_float, EXT_texture_shared_exponent, and EXT_packed_float extensions.
classic Build drivers based on the classic architecture.
dri3 Enable DRI3 support.
egl Enable EGL support.
g3dvl Enable video decode acceleration support for Gallium3D.
gallium Build drivers based on Gallium3D, the new architecture for 3D graphics drivers.
gbm Enable the Graphics Buffer Manager for EGL on KMS.
gles Enable GLES (both v1 and v2) support.
gles1 Enable GLESv1 support.
gles2 Enable GLESv2 support.
llvm Enable LLVM backend for Gallium3D.
llvm-shared-libs Dynamically link Gallium3D drivers against LLVM.
opencl Enable the Clover Gallium OpenCL state tracker.
openmax Enable OpenMAX video decode/encode acceleration for Gallium3D.
openvg Enable the OpenVG 2D acceleration API for Gallium3D.
osmesa Build the Mesa library for off-screen rendering.
pax_kernel Enable if the user plans to run the package under a pax enabled hardened kernel
pic disable optimized assembly code that is not PIC friendly
r600-llvm-compiler Build the LLVM based r600 shader compiler.
shared-dricore Enable sharing of common code for classic DRI drivers.
shared-glapi Enable sharing of common code for the OpenGL API.
vdpau Enable the VDPAU acceleration interface for the Gallium3D Video Layer.
wayland Enable support for dev-libs/wayland
xa Enable the XA (X Acceleration) API for Gallium3D.
xorg Enable the Xorg state tracker for Gallium3D. This is not required for OpenGL acceleration in X.
xvmc Enable the XvMC acceleration interface for the Gallium3D Video Layer.
mlt compressed-lumas Compress the luma files in png.
frei0r Build the module for media-plugins/frei0r-plugins
kdenlive Build support for media-video/kdenlive
lua Build SWIG bindings for Lua
melt Build the melt commandline tool
python Build SWIG bindings for Python
rtaudio Builds rtaudio consumer for native audio support on multiple platforms.
ruby Build SWIG bindings for Ruby
netpbm rle Build converters for the RLE format (utah raster toolkit)
openal alstream Build and install the FFmpeg based alstream example utility
opencolorio pdf Install extra documentation in PDF format
opencv cuda Enable NVIDIA Cuda computations support
eigen Enable usage of dev-cpp/eigen for computations
ipp Enable Intel Integrated Primitive support
opencl Add support for OpenCL
testprograms Build and install programs for testing OpenCV (performance)
vtk Build new 3D visualization module viz based on sci-libs/vtk
openimageio colorio Use media-gfx/opencolorio
opencv Use media-libs/opencv
tbb Use dev-cpp/tbb
opus custom-modes Build with custom-modes.
opusfile fixed-point Enable fixed-point arithmetic operations
float Enable floating point arithmetic operations
http Enable http connections
phonon designer Install plugin for dev-qt/designer
vlc Install VLC Phonon backend
zeitgeist Add support for Zeitgeist event tracking system
phonon-gstreamer network Enable network streaming support via libsoup
portmidi test-programs Install various example programs
quvi json Enable support for JSON output
raptor json Enable support for JSON parsing
sdif ftruncate Enables usage of ftruncate v. truncate
sdl-image webp support loading WEBP images
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 physfs support
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
silgraphite pango Enables the pango-graphite pango module.
spandsp fixed-point Enable fixed point support
svgalib kernel-helper Build the helper kernel module
swfdec alsa Use ALSA for audio output
doc Build documentation
ffmpeg Use media-plugins/gst-plugins-ffmpeg to enable Flash video support. Necessary if you want to use sites like youtube
gstreamer Enable media-libs/gstreamer to support various media input formats. i.e. audio (mp3) and video (flv)
gtk Enable GTK+ convenience library while is necessary for all GTK+ apps using swfdec (gnome-extra/swfdec-gnome and www-plugins/swfdec-mozilla)
pulseaudio Use media-sound/pulseaudio for audio output
taglib asf Provide support for Microsoft's 'advanced systems format' media container.
tremor low-accuracy enable 32bit only multiply operations
vips fits Enable support for the FITS image format through sci-libs/cfitsio
waffle egl Enable EGL support
gbm Enable support for the Generic Buffer Manager (gbm)
wayland Enable Wayland support
x264 10bit Set output bit depth to 10, this may not be compatible with all decoders
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 Set output bit depth to 10.
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.
fusion Enable support for the Fusion audio sub system
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.
vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
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

media-plugins

Package Flag Description
audacious-plugins adplug Build with AdPlug (Adlib sound card emulation) support
bs2b Enable Bauer Bauer stereophonic-to-binaural headphone filter
cue Support CUE sheets using the libcue library
fluidsynth Support FluidSynth as MIDI synth backend
gtk3 Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
midi Build with amidi-plug (MIDI synth) support
scrobbler Build with scrobbler/LastFM submission support
sid Build with SID (Commodore 64 Audio) support
banshee-community-extensions lastfmfingerprint Enable support to ientify your music automatically, using the Last.fm online service.
lirc Enable the remote control plugin (uses app-misc/lirc)
lyrics Enable support for automatically fetching lyrics
mirage Enable the Mirage plugin which automatically, and intelligently generates playlists for you
telepathy Enables the Telepathy plugin which lets you to share and stream music with IM buddies
zeitgeist Build the plugin to inject events to gnome-extra/zeitgeist
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 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
pocket Support for showing content from Pocket
tracker Build support for content discovery using the app-misc/tracker indexer
vimeo Build support for Vimeo content discovery using net-libs/libsoup and dev-libs/libgcrypt
youtube Build support for YouTube content discovery using dev-libs/libgdata
gst-plugins-a52dec orc Use dev-lang/orc for runtime detection of CPU MMX/MMXEXT/3dNow! capabilities to pass down to a52dec library.
gst-plugins-gl libvisual Enable visualization effects via media-libs/libvisual
gst-plugins-meta http Enable http streaming via net-libs/libsoup
libvisual Enable visualization effects via media-libs/libvisual
opus Enable Opus audio codec support
vpx Enables vp8 codec support using libvpx, required to play some HTML5 videos
kipi-plugins expoblending Build the expoblending plugin, which requires media-gfx/hugin
gpssync Build the gpssync plugin, which requires media-lib/libkgeomap and thereby marble
linguas_ha Hausa translation
linguas_mi Maori translation
linguas_tt ?? translation
linguas_ven Venda translation
mediawiki Build the mediawiki export plugin
mjpeg Add mjpeg support
panorama Pull in dependencies needed by panorama plugin
redeyes Add redeyes removal support
videoslideshow Build videoslideshow plugin
vkontakte Build plugin for vkontakte.ru
mediastreamer-ilbc 20ms-frames enable 20ms frame size (default is 30ms). Some VOIP providers such as Gizmo5 (aka Sipphone) require the codec to be compiled with the 30ms setting.
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
mytharchive Allows you to archive recorded content to CD or DVD
mythbrowser Adds a web browser within MythTV
mythgallery Adds a picture viewing gallery 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
mythzoneminder Adds support for zoneminder (requires a server with the appropriate mythtv daemon somewhere on the network).
raw Allows MythGallery to view photos saved in RAW format
vdr-burn dvdarchive DMH DVD - Archive
vdr-epgsearch tre Add support for unlimited fuzzy searching with help of dev-libs/tre library
vdr-graphtft graphtft-fe Install external x11 remote frontend
theme_avp graphTFT Alien vs. Predato theme
theme_deepblue graphTFT default theme
theme_deeppurple graphTFT Deep Purple theme
theme_poetter graphTFT Poetter theme
touchscreen Enable Touchscreen support
vdr-music graphtft Enable support for media-plugins/vdr-graphtft
vdr-pvr350 yaepg Enables full support for the output format of media-plugins/vdr-yaepg
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-text2skin contrib Install user contributed scripts
vdr-vdrmanager stream Add support for streaming Video to Android client
vdr-weatherng dxr3 enables lower osd color depth for dxr3 cards
vdr-xine yaepg Enables support for the plugin vdr-yaepg (showing scaled video besides OSD)
vdr-xineliboutput bluray Enable BluRay metadata support through media-libs/libbluray
cec Enable CEC support through dev-libs/libcec
libextractor Use media-libs/libextract 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

Package Flag Description
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
tucnak2 ftdi Enable support for FTDI USB chips
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 festival Enable text to speech synthesizer
gdal Support for some further map formats
geotiff Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images
graphicsmagick Use graphicsmagick instead imagemagick for rendering

media-sound

Package Flag Description
abcde id3tag Support ID3, ID3v2 tagging of 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 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
amarok embedded Use libmysqld, MySQL embedded server library. Try disabling this if you encounter -PIC related in amarok, it will make amarok rely only on standalone MySQL server.
lastfm Enable Last.fm streaming services support through media-libs/liblastfm
mp3tunes Enable mp3tunes integration
mtp Enable support for libMTP (Plays4Sure) devices access through libmtp
nepomuk Enable Nepomuk based semantic desktop support (deprecated)
ofa Use media-libs/libofa to compute MusicDNS acoustic fingerprints (used by MusicBrainz)
utils Build the utils - old media-sound/amarok-utils
amsynth dssi Enable support for DSSI Soft Synth Interface
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 lv2 Add support for Ladspa V2
ario audioscrobbler Enable song tracking via last.fm
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)
opus Support for creation of Opus files
audacious chardet Try to handle non-UTF8 chinese/japanese/korean ID3 tags
gtk3 Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
audacity id3tag Enables ID3 tagging with id3tag library
libsoxr Uses media-libs/soxr as audio resampling library: Better quality than the included resampler and much faster than libsamplerate while keeping almost the same quality.
midi Enables MIDI support
sbsms Enables sbsms library support for pitch and tempo changing
soundtouch Enables soundtouch library support for pitch and tempo changing
twolame Enables twolame support (MPEG Audio Layer 2 encoder)
vamp Enables vamp plugins support (Audio analysing plugins)
banshee bpm Build beats per minute detection extension
cdda Build with audio CD support
daap Build with Daap support
karma Build with karma support
web Enable support for plugins that access web-based services such as Amazon and wikipedia (requires net-libs/webkit-gtk)
youtube Enable the Youtube plugin
beets beatport Enable support for beatport.com API
bpd Enable support for media-sound/mpd server emulation
chroma Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
convert Enable support for the convert plugin which makes it possible to transcode files
discogs Enable support for the discogs API plugin
echonest Enable support for fetching and storing acoustic attributes of a track from Echo Nest
echonest_tempo Enable support for writing the BPM of a track into its metadata
lastgenre Enable support for importing music genres from last.fm tags
mpdstats Enable support for collecting statistic about listening habits from media-sound/mpd
replaygain Enable support for Replay Gain metadata calculation during import
web Enable embedded webserver support through dev-python/flask
cantata dynamic Enable support for dynamic playlists
http-server Enable internal HTTP server to play non-MPD files
online-services Enable support for online services (Jamendo, Magnatune, SoundCloud, and Podcasts)
replaygain Enable ReplayGain support, for relative volume adjustments
streams Enable support for streams tab (to save favourite streams, and search for others)
clementine box Enable Box support
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
skydrive Enable Skydrive support
system-sqlite Use the system-wide dev-db/sqlite installation
ubuntu-one Enable Ubuntu One support
wiimote Enable support for Wii remote
cmus cdio use libcdio for CD support
cue enable CUE sheet parsing
discid enable reading the ID of the inserted CD
pidgin install support script for net-im/pidgin
wma add support for Windows Media Audio
csound beats Build the beats score frontend
chua Build the chua opcodes
csoundac Build the CsoundAC extension module
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
luajit Use the lua just-in-time compiler dev-lang/luajit instead of dev-lang/lua
portmidi Build the PortMIDI I/O module
samples Install the HRTF datafiles for use with hrtfmove, hrtfmove2, hrtfstat, hrtfearly, and hrtfreverb
score Build the alternative score parser
stk Build the stk opcodes
tcl Build the tcl interface and clients
utils Build stand-alone executables for utilities that can also be used via `csound -U`
darkice aacplus AAC+ encoding via media-libs/libaacplus
opus Enable Opus audio codec support
twolame Build with twolame support
decibel-audio-player gnome Adds Gnome media keys support, so you can control Decibel using hotkeys.
gnome-keyring Adds support for storing your Last.fm password using gnome-keyring.
denemo fluidsynth Enable Fluidsynth MIDI software synthesis
portmidi Enable support for the portmidi backend
dir2ogg mac Add support for decoding Monkey's Audio files
wma Add support for wma files through mplayer
easytag gtk2 Enable GTK+:2 support and disable default GTK+:3 support
gtk3 Enable GTK+:3 support (default) and disable GTK+:2 support
opus Enable support for media-libs/opus and media-libs/opusfile (opus audio codec)
ecasound lv2 Add support for Ladspa V2
oil Use dev-libs/liboil for inner loop optimizations
fapg xspf Enable support for saving XSPF playlists.
flacon mac Add support for Monkey's Audio files
replaygain Support for Replay Gain metadata, for relative volume adjustment
tta Add support for True Audio encoding
freewheeling fluidsynth compile with support for fluidsynth
frescobaldi portmidi Enable media-libs/portmidi support
gejengel audioscrobbler Enable track submission on last.fm
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
google-musicmanager log Enables advanced logging through dev-libs/log4cxx
gpodder webkit Enable the webkit rendering engine for HTML episode shownotes
herrie http Enable http streaming
xspf Enable support for reading and saving XSPF playlists
hydrogen archive Use libarchive instead of libtar
jack-audio-connection-kit coreaudio Build the CoreAudio driver on Mac OS X systems
cpudetection Enables runtime cpudetection
pam Add basic realime 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 Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
kwave opus Enable Opus audio codec support
phonon Enable playback via Phonon
lame mp3rtp Build the mp3-to-RTP streaming utility. **UNSUPPORTED**
lmms fluidsynth Enables Fluidsynth MIDI software synthesis plugin.
stk Enables STK Mallet plugin.
vst Enables the VeSTige plugin to run VST plugins through Wine.
lyvi mpris Enable MPRIS support
mangler espeak Text to speech engine
g15 Logitech g15 lcd support
opus Codec specialized for speech over the internet
mixxx shout Enable broadcasting support via media-libs/libshout
moc cache Enable tags caching support
magic Use libmagic to determine mimetypes
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
mp3splt-gtk audacious Include media-sound/audacious support
gtk3 Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
mpd adplug Enable the AdPlug decoder plugin
cdio Use libcdio for ISO9660 parsing support
curl Support for web stream listening
faad Use external faad library for AAC decoding
fifo Support writing audio to a FIFO
fluidsynth Enables Fluidsynth MIDI software synthesis
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
lastfmradio Support listening to last.fm radio stations
libmpdclient Enable support for remote mpd databases
mpg123 Enable support for mp3 decoding over media-sound/mpg123
network Enables network streaming support
opus Enable Opus codec support
pipe Support writing audio to a pipe
recorder Enables output plugin for recording radio streams
sid Build with SID (Commodore 64 Audio) support
soundcloud Build plugin to access soundcloud
soup Use net-libs/libsoup for HTTP streaming
systemd Enable support for systemd socket activation
twolame Support twolame MPEG-2 encoding
wildmidi Enable MIDI support via wildmidi
zip Support for ZIP files
mpfc wav Enable wav audio codec support
mpg123 3dnowext Enable 3dnowext cpu instructions
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).
speech Enable text-to-speech support in Mumble.
murmur ice Use dev-cpp/Ice to enable remote control capabilities.
ncmpc artist-screen Enable artist screen
chat-screen Enable the chat screen
colors Enable color support
help-screen Enable the help screen
key-screen Enable key editor screen
lyrics-screen Enable lyrics screen
mouse Enable curses getmouse support
search-screen Enable search screen
song-screen Enable song viewer screen
ncmpcpp clock Enable clock screen
fftw Build the visualizer plugin that pulls in sci-libs/fftw
outputs Enable outputs screen
visualizer Enable visualizer screen with sound wave/frequency spectrum modes
pianobooster fluidsynth Enable Fluidsynth MIDI software synthesis
picard acoustid Use media-libs/chromaprint for acoustic fingerprinting
pms regex Enable regular expression searches using dev-libs/boost
podcatcher bittorrent Enable support for bittorrent downloads
pragha glyr Enable music metadata searchengine support using media-libs/glyr
keybinder Enable shortcut support using dev-libs/keybinder
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
puddletag acoustid Use media-libs/chromaprint for acoustic fingerprinting
cover Enables editing of FLAC cover art
musicbrainz Enables support for musicbrainz, needs dev-python/python-musicbrainz
quodlibet Enables support for editing media-sound/quodlibet databases
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.
asyncns Use libasyncns for asynchronous name resolution.
doc Build the doxygen-described API documentation.
equalizer Enable the equalizer module (requires sci-libs/fftw).
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.
gnome Use GConf to store user preferences on streams and so on. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
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 http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode .
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.
xen Builds a special paravirtualized module for running in a Xen guest.
qmmp bs2b Enable Bauer stereophonic-to-binaural headphone filter
cover Enable album cover support
crossfade Enable crossfade effect when switching tracks
enca Detects the character encoding automatically
game Enable Game music support
kde Use kde4 notifier system
lyrics Fetch track lyrics from the web
midi Enable midi support using wildmidi library
mpris Enable MPRIS support
notifier Enable qmmps' notifier system
opus Enable the opus plugin
projectm Enable projectm music visualization plugin
scrobbler Enable audioscrobbler/last.fm support
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 dssi Enable support for DSSI Soft Synth Interface
rubberband Enable support for in-place audio clip pitch-shifting through the rubberband library
qtscrobbler cli Build commandline client
quark gnome Provides tray-icon and enables gconf support
rezound 16bittmp Use 16bit temporary files (default 32bit float), useful for slower computers
soundtouch compile with support for soundtouch
rhythmbox daap Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing
html Use net-libs/webkit-gtk for detecting and displaying HTML podcast episode descriptions.
libsecret Enable libsecret support to store login credentials
visualizer Enable support for visualizations using media-plugins/gst-plugins-libvisual
zeitgeist Build the plugin to inject events to gnome-extra/zeitgeist
rubyripper cdrdao Add support for advanced toc scanning using app-cdr/cdrdao
cli Build command line interface rubyripper
normalize Add support for normalizing audio file volume levels
wav Add support for wavegain
shntool alac Add support for Apple Lossless Audio Codec files
mac Add support for Monkey's Audio files
snd s7 Enable the s7 extension language (a version of Scheme)
sonata lyrics Support for lyrics fetching
trayicon Enable support for trayicon
sonic-visualiser id3tag Enables ID3 tagging with id3tag library
soundconverter opus Enable Opus audio codec support
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
squeezeslave display Enable a text-based display
tremor Use a fixed-point version of the Ogg Vorbis decoder (media-libs/tremor)
wma Enable support for streaming Windows Media Audio
zones Pairs surround sound speakers into stereo zones (requires 5.1 setup or better)
teamspeak-server-bin tsdns Make use of TeamSpeak DNS.
tomahawk telepathy Enable support for the real-time communication framework telepathy
twitter Enable twitter support
traverso lv2 Add support for Ladspa V2
umurmur polarssl Use net-libs/polarssl instead of dev-libs/openssl
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
gvfs Transport for glibs virtual filesystem
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
vocoder Phase vocoder effect plugin
xml Enable support for various XML based playlists and sources: RSS, XSPF
xmp audacious Enable audacious support
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.
jack Adds support for audio input/output via the JACK Audio Connection Kit.
mp3 Sets runtime dependencies to support decoding MP3 audio.
oss Adds support for OSS (open sound system) audio input/output.

media-tv

Package Flag Description
freevo mixer Enable support for adjusting volume via media-sound/aumix
tv Enable support for the tv guide plugin
gentoo-vdr-scripts nvram Add support for using nvram-wakeup to set wakeup time in bios
linuxtv-dvb-apps alevt Build videotext decoder
me-tv http Installation of Web-frontend
mythtv alsa Allows MythTV to directly output sound to ALSA devices, this is needed if you are using ALSA dmix or SPDIF. Note, you will have to physically type your device into the MythTV configuration since it will only give you /dev/dsp devices in the drop down.
altivec Builds ffmpeg's codec libraries with altivec support.
autostart Uses a custom autostart configuration gleaned from experience with MythTV since its early versions and discussed with other MythTV maintainers and users. Does not rely on KDE being installed like most methods do.
bluray Pulls in libbluray for BluRay support.
cec Allows you to control CEC enabled TVs via HDMI. Currently requires a USB based CEC -> HDMI injector between your TV and video card since no graphics drivers support CEC natively.
crystalhd Allows you to utilize a Broadcom CrystalHD hardware based video decoder to improve the performance of video decode.
debug Instructs Qt to use the 'debug' target instead of 'release' target. If your MythTV is crashing or you need a backtrace, you need to compile it with this option otherwise the debugging data is useless.
dvb Enables support for Linux DVB cards. These include all cards that work with digital signals such as ATSC, DVB-T, DVB-C, and DVB-S, QAM-64, and QAM-256.
egl Support EGL video output.
fftw Support visualizations via sci-libs/fftw
hls HTTP Live Streaming support
ieee1394 Allows MythTV to communicate and use Firewire enabled Cable boxes. These are typically found in the United States, where such support is required by law. This will also install Firewire test programs and external channel changers if the internal changer does not work.
jack Allows MythTV to use JACK as your sound output device. You will have to manually configure the path to your JACK settings.
lcd Tells MythTV that you have an instance of app-misc/lcdproc configured on your machine and it should output information such as current time, show name, episode name, etc to that LCD.
lirc Adds LIRC support directly to MythTV allowing for built in control via a LIRC device.
perl Builds the perl bindings for MythTV. Allows you to write scripts in Perl to control your MythTV setup or communicate with it.
raop Remote Audio Output Protocol (aka AirTunes/AirPlay)
vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
xmltv Pulls in the media-tv/xmltv TV listing grabbers for users not using Schedules Direct.
tvbrowser themes Install extra theme packs
tvheadend ccache Use dev-util/ccache
dvbscan Use media-tv/linuxtv-dvb-apps
imagecache Enable support for image caching
uriparser Use dev-libs/uriparser
xmltv Use media-tv/xmltv
v4l-dvb-saa716x firmware Install firmware
xawtv xext Enable use of XFree extensions (DGA,VidMode,DPMS)
zvbi Enable VBI Decoding Library for Zapping
xbmc airplay enable AirPlay support
bluray Enable playback of Blu-ray filesystems
cec Enable support for HDMI-CEC devices via libcec
fishbmc Enable fishBMC visualization plugin
gles Enable support for GLES
goom Enable GOOM visualization plugin
midi Support MIDI files
nfs Enable NFS client support
projectm Enable projectM visualization plugin
pvr Enable MythTV support
rsxs Enable really slick X screensavers
rtmp Enable Real Time Messaging Protocol using librtmp
sftp Support browsing files over SFTP
vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
webserver Enable internal webserver
xrandr Support X randr extension
xmltv ar Argentina tv listing grabber
be Belgium and Luxemburg tv listing grabber
brnet Brazil cable tv listing grabber
ch Switzerland bluewin tv listing grabber
dk Denmark tv listing grabber
dtvla Latin America digital tv listing grabber
ee Estonia tv listing grabber
es Spain tv listing grabber
es_laguiatv Spain alternative grabber
es_miguiatv Spain alternative grabber
eu_epg EPG grabber for some European countries.
fi Finland tv listing grabber
fr France tv listing grabber
hr Croatia tv listing grabber
huro Hungarian tv listing grabber
il Israel tv listing grabber
in India tv listing grabber
is Iceland tv listing grabber
it Italy tv listing grabber
jp Japan tv listing grabber
na_dd North America tv listing grabber
na_dtv North America Direct TV grabber
na_icons option for na_dd to download icons
nc Caledonie Island tv listing grabber
nl Netherlands tv listing grabber
nl_wolf Netherlands alternative tv listing grabber
no Norway tv listing grabber
no_gf Norway Gfeed tv listing grabber
pt Portugal tv listing grabber
re Reunion Island (France) tv listing grabber
se_swedb Sweden 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_rt Britain alternative tv listing grabber
za South Africa tv listing grabber

media-video

Package Flag Description
aravis X Build the GTK+-based video viewer for aravis. This requires GStreamer and a few plugins but technically not the GST plugin for aravis.
gstreamer Build the GStreamer plugin for aravis, but not the video viewer.
arista faac Use external faac library for AAC encoding
nautilus Add an entry in the Nautilus context menu to transcode media files for a specified device.
avidemux aften Enable A/52 (AC-3) audio encoder support.
amr Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
vaapi Enable VAAPI (Video Acceleration API) for hardware decoding.
vpx Enable VP8 codec support via media-libs/libvpx.
bombono-dvd gnome Use GVFS for desktop integration
chaplin transcode Enable DVD ripping and transcoding
clive clipboard Support reading from X clipboard
pager Support pager!?
password Support password controlled sites
devede mencoder Prefer MPlayer mencoder over Libav avconv or FFmpeg ffmpeg for encoding.
dv2sub kino install kino plugin
dvd-slideshow themes Install theme pack
dvdauthor graphicsmagick Use media-gfx/graphicsmagick instead of media-gfx/imagemagick
dvdrip fping Enables fping support for cluster rendering
subtitles Enables support for subtitle ripping
dvdstyler deprecated Use the old libgnomeui-2 library
ffdiaporama openclipart Support openslipart database
texturemate Install extra backgrounds
ffmpeg 3dnowext Enable manually-optimised routines using the AMD 3DNow!Ex SIMD instruction set, present in modern AMD CPUs. (Check for 3dnowext in /proc/cpuinfo to know whether your CPU supports it).
aacplus AAC+ encoding via media-libs/libaacplus.
amr Enables Adaptive Multi-Rate Audio support
amrenc Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc.
armv5te Enables optimizations for armv5te processors.
armv6 Enables optimizations for armv6 processors.
armv6t2 Enables optimizations for armv6t2 processors.
armvfp Enables VFP optimizations for ARM processors.
avx Adds support for Advanced Vector Extensions instructions (Intel Sandy Bridge, AMD Bulldozer and later chips)
avx2 Adds support for Advanced Vector Extensions 2 instructions (Intel Haswell and later chips)
bindist Enforces license compatibility constraints via REQUIRED_USE.
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.
celt Adds Xiph CELT audio decoding support via media-libs/celt
cpudetection Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
dirac Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
faac Use external faac library for AAC encoding
fdk Use external fdk-aac library for AAC encoding
flite Adds a text-to-speech filter based on app-accessibility/flite.
fma3 Enables FMA3 optimizations: AMD processors starting with Piledriver architecture and Intel Haswell based processors or later.
fma4 Enables FMA4 optimizations: AMD processors starting with Bulldozer architecture.
frei0r Enable frei0r wrapping in libavfilter
fribidi Enables fribidi support in the drawtext filter.
gme Enables support for media-libs/game-music-emu for playing various video game music formats.
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.
libsoxr Enables audio resampling through media-libs/soxr.
libv4l Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library.
mips32r2 Enables MIPS32R2 optimizations.
mipsdspr1 Enables MIPS DSP ASE R1 optimizations.
mipsdspr2 Enables MIPS DSP ASE R2 optimizations.
mipsfpu Enables floating point MIPS optimizations.
mmxext Enables mmx2 support
network Enables network streaming support
openssl Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS).
opus Adds (decoding) support for the Opus codec via media-libs/opus.
pic Force shared libraries to be built as PIC (this is slower)
quvi Adds support for playing media from Internet services using the quvi project.
rtmp Enable Real Time Messaging Protocol using librtmp
schroedinger Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
sse4 Enables SSE4 optimizations: Intel Core microarchitecture and AMD K10 or later.
sse4_2 Enables SSE4.2 optimizations: Nehalem-based Intel Core i7 or later.
ssh Enable SSH/sftp support via net-libs/libssh.
ssse3 Faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
twolame Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder.
vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
vis Adds support for SIMD optimizations for UltraSPARC processors.
vpx Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though.
webp Enables WebP encoding with media-libs/libwebp.
x265 Enables HEVC encoding with media-libs/x265.
xop Enables XOP (eXtended Operations) optimizations: AMD processors starting with Bulldozer architecture.
zvbi Enables media-libs/zvbi based teletext decoder.
ffmpeg2theora kate Adds support for Ogg Kate subtitles via libkate.
gnome-mplayer dconf Enable support for gnome-base/dconf
gda Enable support for gnome-extra/libgda
google2srt html Install HTML documentation
gxine gnome-screensaver Enable dbus support to communicate with gnome-extra/gnome-screensaver
h264enc ogm Support for OGM container format
handbrake fdk Support for encoding AAC using media-libs/fdk-aac.
ffmpeg Use FFmpeg from media-video/ffmpeg to decode MPEG-2 instead of media-plugins/gst-plugins-mpeg2dec.
gstreamer Support for the streaming media framework from media-libs/gstreamer.
gtk Support for Gimp ToolKit + from x11-libs/gtk+, requirement for a GUI-based HandBrake.
hwdecode-demos vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
kdenlive nepomuk Enable Nepomuk based semantic desktop support (deprecated)
kino gpac Enable GPAC support when exporting to 3GPP format
kmplayer npp Compile the npp backend that plays xembed style browser plugins.
libav 3dnowext Enable manually-optimised routines using the AMD 3DNow!Ex SIMD instruction set, present in modern AMD CPUs. (Check for 3dnowext in /proc/cpuinfo to know whether your CPU supports it).
aac Use external vo-aacenc library for AAC encoding
amr Enable Adaptive Multi-Rate Audio support
avx Adds support for Advanced Vector Extensions instructions (Intel Sandy Bridge, AMD Bulldozer and later chips)
bindist Build binary redistributable version without including nonfree decoders and encoders.
cdio Enable audio CD grabbing with dev-libs/libcdio.
cpudetection Enables runtime CPU detection (useful for bindist, compatibility on other CPUs).
dirac Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
faac Use external faac library for AAC encoding
fdk Use external fdk-aac library for AAC encoding
frei0r Enable frei0r wrapping in libavfilter
gpl Build all GPL licensed code. Without this flag set the package is build under LGPL license.
hardcoded-tables Use pre-calculated tables rather than calculating them on the fly.
mmxext Enable mmx2 support.
network Enable network streaming support.
openssl Prefer dev-libs/openssl over net-libs/gnutls to provide SSL/TLS support (notice: the resulting binaries are unredistributable).
opus Use the external opus library for encoding and decoding.
pic Force shared libraries to be built as PIC (this is slower).
pulseaudio Enable pulseaudio input support.
qt-faststart Build and install qt-faststart application.
rtmp Enable Real Time Messaging Protocol using librtmp instead the native implementation.
schroedinger Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
ssl Enable SSL/TLS support using dev-libs/openssl or dev-libs/gnutls.
ssse3 faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips).
tools Build and install small tools like aviocat, cws2fws, graph2dot, ismindex, qt-faststart.
vaapi Enable VAAPI (Video Acceleration API) for hardware decoding.
vis Adds support for SIMD optimizations for UltraSPARC processors.
vpx Enable vp8 encoding support using libvpx.
webp Enable WebP encoding with media-libs/libwebp.
x265 Enable HEVC encoding with media-libs/x265.
lives libvisual Enable libvisual support
minitube download Enable support for downloading YouTube videos
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
v4l Uses media-libs/libv4l function mapping for input_uvc plugin
www Installs WWW content
motiontrack multiprocess Enables multi-process support (SMP/cluster) for motiontrack programs
mplayer 3dnowext Enable 3dnowext cpu instructions
bindist Enforces license compatibility constraints via REQUIRED_USE.
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)
cpudetection Enables runtime CPU detection (useful for bindist, 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
mmxext Enables mmx2 support
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
ssse3 faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
tga Enables Targa video output
toolame Enable toolame MPEG-2 encoding
tremor Enable internal support for Vorbis
twolame Enable twolame MPEG-2 encoding
vidix Support for vidix video output
xanim Enables support for xanim based codecs
xvmc Enables X-Video Motion Compensation support
zoran Enables ZR360[56]7/ZR36060 video output
mplayer2 3dnowext Enable 3dnowext cpu instructions
bluray Enable playback of Blu-ray filesystems
bs2b Enable Bauer stereophonic-to-binaural headphone filter
cdio Use libcdio for CD support (instead of cdparanoia)
cpudetection Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
dvdnav Use forked libdvdnav, navigate menus in GUIs
enca Enables support for charset discovery and conversion
faad Use external faad library for AAC decoding
md5sum Enables md5sum video output
mmxext Enables mmx2 support
mng MNG input support
mp3 Enable support for mp3 decoding over media-sound/mpg123 instead of relying on ffmpeg support.
network Enables network streaming support
nut Enables support for the NUT container format
pnm Add PNM video output option, to create PPM/PGM/PGMYUV images
postproc Enable image post-processing via libpostproc
pvr Enable Video4Linux2 MPEG PVR
quvi Enable support for streaming sites using media-libs/libquvi
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
shm Enable support for shm
ssse3 Faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
symlink Copy all binaries and configuration into locations occupied by media-video/mplayer and thus act like drop-in replacement.
tga Enables Targa video output
xanim Enables support for xanim based codecs
yuv4mpeg Enables yuv4mpeg video output
mpv bluray Enable playback of Blu-ray filesystems
bs2b Enable Bauer stereophonic-to-binaural headphone filter
cdio Use libcdio for CD support (instead of cdparanoia)
doc-pdf Build documentation in pdf format
dvdnav Enable support for DVD navigation using media-libs/libdvdnav
enca Enables support for charset discovery and conversion using app-i18n/enca
libguess Enables support for charset discovery and conversion using app-i18n/libguess
libmpv Build mpv shared library
luajit Use dev-lang/luajit instead of dev-lang/lua
mpg123 Enable support for mp3 decoding over media-sound/mpg123 instead of relying on ffmpeg support.
postproc Enable image post-processing via libpostproc
pvr Enable Video4Linux2 MPEG PVR
quvi Enable support for streaming sites using media-libs/libquvi
radio Enable V4L2 radio interface and support
sdl Enable video and audio support via media-libs/libsdl2
shm Enable support for shm
vaapi Enable VAAPI (Video Acceleration API) for hardware decoding
vf-dlopen Install additional video filters for using with -vf dlopen
ogmrip ogm Support for OGM container format
srt Support for SRT subtitle format
parole clutter Compile in Clutter GTK+ support
pgcedit video Add support for video preview
plasma-mediacenter nepomuk Enable Nepomuk based semantic desktop support (deprecated)
qgifer imagemagick Use imagemagick for image operations
rtmpdump gnutls Use GnuTLS library instead of the default OpenSSL
polarssl Use PolarSSL library instead of the default OpenSSL
smplayer2 download-subs Enable subtitle downloader (requires QuaZip)
totem bluetooth Enable support for user-presence detection via the user's bluetooth handset using net-wireless/bluez
flash Install browser plugin for playing embedded Adobe Flash videos. Warning: breaks non-video Flash objects on many websites.
grilo Use media-libs/grilo to browse media content from various sources
iplayer Enable BBC player support
lirc Enable support for controlling Totem with a remote control using app-misc/lirc
nautilus Enable the nautilus extension
python Build support for dev-lang/python plugins
tracker Enable support for searching media files using the indexer app-misc/tracker
youtube Enable youtube plugin
zeitgeist Build the plugin to inject events to gnome-extra/zeitgeist
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
tsmuxer qt4 Installs tsMuxerGUI (needs Qt4)
ushare dlna Add DLNA (media-libs/libdlna) support
vdr alternatechannel Use alternate channel on record
bidi fribid support, for languages, written from right to left
ddepgentry remove duplicate EPG entries
dvlvidprefer controls video-dir choice on recording
graphtft support for grapftft plugin up from vdr-graphtft-0.1.7
html Install HTML documentation
jumpingseconds skip seconds in played records
jumpplay Enables automatic jumping over cut marks while watching a recording
mainmenuhooks Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...)
menuorg Enables support for the menuorg-plugin
naludump Removes NALU fill data from h.264-Streams of TS files
permashift permanent timeshift by recording live TV on hard disk, need plugin vdr-permashift
pinplugin Support for pin plugin
rotor Enable support for plugin vdr-rotor for dish-positioner.
setup Enable support for the plugin vdr-setup
ttxtsubs support for ttxtsubs plugin
vasarajanauloja replacement for the liemikuutio patch, adds some nice must haves features
wareagleicon Replace original icon set in menu
yaepg Enables support for the plugin vdr-yaepg
vlc X Enables support for, e.g., fullscreen mode via the X Window System. By itself, this flag does not build a graphical interface.
atmo Enables support for AtmoLight (homebrew Ambient Lighting Technology)
audioqueue Enables AudioQueue audio module for Mac OS X.
avcodec Enables libavcodec support for video/audio encoding/decoding. libavcodec is part of FFmpeg.
avformat Enables libformat support for reading and writing various media containers. libavformat is part of FFmpeg.
bluray Enables libbluray for Blu-ray disc support.
chromaprint Enables libchromaprint for Chromaprint based audio fingerprinter support.
dc1394 Enables IIDC cameras support.
dirac Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
direct2d Enable Win7/VistaPU Direct2D support.
directx Enable Win32 DirectX support.
dshow Enables Win32 DirectShow support.
dvbpsi Enables support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi.
dxva2 Enables Win32 DxVA2 support.
egl Enables EGL video output module.
faad Enable AAC audio decoding library support via media-libs/faad2.
fbosd Enables the framebuffer overlay plugin.
fdk Enables the Fraunhofer AAC codec library.
fluidsynth Enables Fluidsynth MIDI software synthesis (with external sound fonts).
gcrypt Enables cryptography support via libgcrypt.
gme Enables support for media-libs/game-music-emu for playing various video game music formats.
gnome Adds support for GNOME's filesystem abstraction layer, gnome-base/gnome-vfs. This flag is not GUI-related.
growl Enables growl notification support (over UDP for remote access and native on OSX)
httpd Enables a web based interface for vlc.
ios-vout Enables iPhone OS video output.
kate Adds support for Ogg Kate subtitles via libkate.
libproxy Enables support for proxy settings in the HTTP access module.
libtar Uses libtar instead of the built-in tar reader for reading custom skins.
libtiger Enables Ogg Kate subtitles rendering using libtiger.
linsys Enables support for Linux Linear Systems Ltd. SDI and HD-SDI input cards.
live Enables live555 streaming media support (client support for rtsp).
lua Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things.
macosx Enables Mac OS X gui support.
macosx-audio Enables Mac OS X audio module.
macosx-dialog-provider Enables Mac OS X dialog module.
macosx-eyetv Enables Mac OS X EyeTV (TNT Tuner) module.
macosx-qtkit Enables Mac OS X qtkit module: qtcapture (video) and qtsound (audio) module.
macosx-quartztext Enables Mac OS X quartz text module.
macosx-vout Enables Mac OS X video output module.
matroska Enables matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)
media-library Build the (sqlite based) media library.
omxil Enables OpenMAX Integration Layer codec module.
opencv Enabled OpenCV (computer vision) filter module.
optimisememory Enable optimisation for memory rather than performance.
opus Support opus decoding via libopus.
postproc Enables image post-processing via libpostproc (part of FFmpeg).
projectm Enables the projectM visualization plugin.
pvr Enables PVR cards access module.
qt4 Builds a x11-libs/qt based frontend, a graphical interface.
rdp Enables freerdp for RDP/Remote Desktop client support
rtsp Enables real audio and RTSP modules.
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!
schroedinger Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
sdl-image Enables sdl image video decoder (depends on sdl)
sftp Enables libssh2 to support SFTP file transfer.
shine Enables shine fixed point mp3 encoder.
shout Enables libshout output.
sid Adds support for playing C64 SID files through media-libs/libsidplay-2.
skins Enables support for the skins2 interface.
switcher Enables MPEG2 video switcher stream output module.
swscale Enables image scaling and conversion via libswscale (part of FFmpeg).
tremor Enables tremor, a fixed-point version of the Ogg Vorbis decoder.
twolame Enables twolame support (MPEG Audio Layer 2 encoder).
upnp Enables support for the Intel SDK stack based UPnP discovery module instead of CyberLink.
vaapi Enables VAAPI (Video Acceleration API) for hardware decoding
vcdx Enables VCD with navigation via libvcdinfo (depends on cdio)
visual Enables a libvisual based visualization plugin.
vlm New videolan (media) manager (vlm), a little manager designed to launch and manage multiple streams from within one instance of VLC.
vpx Enables the decoder(s) from the WebM VP8 / VP9 Codec SDK.
waveout Enable win32 waveOut plugin.
wingdi Enable Win32 GDI module.
wma-fixed Enables fixed point WMA decoder.
xcb Support the X C-language Binding, a replacement for Xlib; !!! you will need this option to be able to integrate video in the Qt interface, see bug #500678.
zvbi Enables support for teletext subtitles via the zvbi library.
winki mjpeg Enables mjpegtools support
x264-encoder 10bit Set output bit depth to 10
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

Package Flag Description
2ping crc Enable crc check.
md5 Enable md5 hash check.
server Install the server init scripts.
sha Enable sha1 or sha256 check.
aimsniff http Install the WAS (Web AIM Sniff) frontend
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 aruba Enable Aruba support
gre Enable GRE support
mpls Enable support for mpls networks
bmon rrdtool Enables net-analyzer/rrdtool support
bwm-ng csv Enable csv output
html Enable html output
cacti doc install html documentation
check_mk agent-only Install only the check_mk agent.
apache_status Install check_mk-agent apache-status plugin.
dmi_sysinfo Install check_mk-agent dmi_sysinfo plugin.
livestatus Enable livestatus.
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.
wato Enable check_mk WATO - check_mk's Web Administration Tool.
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)
flowgrind pcap Enable packet capturing support using net-libs/libpcap
fprobe messages enable console messages
gr-fosphor glfw enable GLFW based interface
httping tfo Enable support for TCP Fast Open
hydra ncp NCP protocol (NetWare) support through net-fs/ncpfs
icinga contrib additional scripts
eventhandler Adds support for running custom scripts whenever a host or service state change occurs
idoutils Adds DB support
lighttpd Adds Lighttpd support
plugins Adds support for nagios plugins
web Adds generic web interface support
icinga-web pnp Enables pnp4nagios integration
icinga2 classicui Adds support for the old interface
plugins Adds support for nagios plugins
linkchecker bookmarks Mozilla Bookmark parsing
login login form submission
nagios Install nagios cli plugin
sqlite Mozilla Bookmark parsing
syntax-check HTML/CSS syntax checks
metasploit development Install dependancies needed for metasploit and exploit development
lorcon Enable lorcon for raw packet injection
oracle Enable restricted oracle modules which have additional deps
pcap Enable libpcap for packet sniffing
munin apache Set up the configuration of the CGI generation of HTML and graphs to work with Apache. This also install an include-able configuration file.
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 lighttpd install www-servers/lighttpd config
web enable web interface
nagios-plugins jabber Install the script for sending IM notifications over Jabber with Nagios.
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-ntp Install net-misc/ntp required for monitoring NTP servers and drifts. 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.
nagios-ssh Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file.
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.
snmp Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file.
sudo Install a file to allow the nagios user to execute some commands via app-admin/sudo, so that the scripts can access devices and features that wouldn't be otherwise allowed by nagios.
suid Give root privileges to the ICMP, DHCP and IDE S.M.A.R.T. check binaries. This allows them to ignore the access controls that would disallow the nagios user from running the check.
ups Install sys-power/nut required for monitoring compatible UPS units. 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.
nagvis automap Enable automated map generation using media-gfx/graphviz
ncrack ssh Compile and link against the internal openssh modified library.
net-snmp elf Enable the use of elf utils to check uptime on some systems
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).
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.
ucd-compat Build UCD compatibility library. Increases significantly the install size.
netperf demo Emit interim results during the run. May affect results
sctp Include tests to measure SCTP performance
nfdump compat15 Enable read support for nfdump data files created with nfdump 1.5.x
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 lua Include support for the Nmap Scripting Engine (NSE) through dev-lang/lua
ncat Install the ncat utility
ndiff Install the ndiff utility
nmap-update Install nmap-update, which uses dev-vcs/subversion to update nmap scripts in your home directory
nping Install the nping utility
zenmap Install the GTK+ based zenmap utility
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.
minimal Only build the check plugins for Nagios/Icinga, and not the daemon.
nsca crypt Build support for crypted communication with nsca, through dev-libs/mcrypt. 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.
pchar pcap Use the net-libs/libpcap library
pmacct 64bit Use 64bit counters instead of 32bit ones
mongodb Add support for mongodb backend
ulog Enable ULOG support
rrdcollect exec Enable exec:/// support
librrd Use the librrd library from net-analyzer/rrdtool
rrdtool graph Enable support for graphing functions
rrdcgi Build rrdcgi support
sancp sguil Enable sguil (The Analyst Console for Network Security Monitoring) support
sarg gd Enable support for graphs in reports through media-libs/gd
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
scapy pyx Enable dev-python/pyx support for psdump/pdfdump commands
tcpreplay Enable net-analyzer/tcpreply support for fast packet replay
visual Enable dev-python/visual support for 3d graphs
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
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.
dynamicplugin Enable ability to dynamically load preprocessors, detection engine, and rules library. This is required if you want to use shared object (SO) snort rules.
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!
linux-smp-stats Enable accurate statistics reporting through /proc on systems with multipule processors.
mpls Enables support for processing and inspecting Multiprotocol Label Switching MPLS network network traffic. Only needed if you are monitoring an MPLS network.
non-ether-decoders Enable decoding of non-ethernet protocols such as TokenRing, FDDI, IPX, etc.
normalizer Enables support for normalizing packets in inline deployments to help minimize the chances of detection evasion.
paf Enables support for Protocol Aware Flushing. This allows Snort to statefully scan a stream and reassemble a complete protocol data unit regardless of segmentation.
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.
targetbased Enables support in snort for using a host attibute XML file (attribute_table.dtd). This file needs to be created by the user and should define the IP address, operating system, and services for all hosts on the monitored network. This is cumbersome, but can improve intrusion detection accuracy.
zlib Enables HTTP inspection of compressed web traffic. Requires dynamicplugin be enabled.
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 chroot Chroot into /var/lib/tcpdump when dropping privileges
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
tcpflow pcap Use net-libs/libpcap for packet capturing
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
wireshark adns Use the GNU net-dns/c-ares library to resolve DNS names
crypt Use dev-libs/libgcrypt to decrypt traffic
doc-pdf Build documentation in pdf format (US and a4 paper sizes)
gtk Build the wireshark executable with a GTK+ UI version 2.
gtk2 Build the wireshark executable with a GTK+ UI version 2.
gtk3 Build the wireshark executable with a GTK+ UI version 3.
libadns Use net-lib/adns (DEPRECATED) instead of net-dns/c-ares to resolve DNS names
netlink Use dev-libs/libnl
pcap Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark)
qt4 Build the wireshark executable with an experimental Qt UI instead of GTK+.
smi Use net-libs/libsmi to resolve numeric OIDs into human readable format
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 json Add support to store results JSON based
redis Add support for storing in a redis DB via dev-libs/hiredis

net-dialup

Package Flag Description
accel-ppp shaper Support for traffic shaping
valgrind Compile in valgrind hints
capi4k-utils fax Install capi-fax demo programs
pppd Installs pppdcapiplugin modules
rcapid Installs rcapid daemon
freeradius bindist Disallow building the dev-db/firebird module, which is not compatible with GPL-2.
pcap Build the RADIUS sniffer which requires net-libs/libpcap.
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
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
mppe-mppc Enables support for MPPC (Microsoft Point-to-Point Compression) - NEEDS A PATCHED KERNEL <=2.6.14 (see http://mppe-mppc.alphacron.de)
pam Enables PAM (Pluggable Authentication Modules) support
radius Enables RADIUS support
pptpd gre-extreme-debug Log all GRE accepted packages when in debug mode (required if you want upstream support)
xl2tpd dnsretry Patch for host lookup retries, activated by redial feature
kernel Enable kernel interface for PPPoL2TP

net-dns

Package Flag Description
avahi autoipd Build and install the IPv4LL (RFC3927) network address configuration daemon
bookmarks Install the avahi-bookmarks application (requires dev-python/twisted)
gtk3 Build the avahi-ui-gtk3 library, and use gtk3 for the avahi utilities under USE=utils
howl-compat Enable compat libraries for howl
introspection Use dev-libs/gobject-introspection for introspection
mdnsresponder-compat Enable compat libraries for mDNSResponder
utils Install the avahi gtk+ utils avahi-discover, bssh, and bvnc
bind dlz Enables dynamic loaded zones, 3rd party extension
filter-aaaa Enable filtering of AAAA records over IPv4
fixed-rrset Enables fixed rrset-order option
gost Enables gost OpenSSL engine support
gssapi Enable gssapi support
rpz Enable response policy rewriting (rpz)
rrl Response Rate Limiting (RRL) - Experimental
sdb-ldap Enables ldap-sdb backend
urandom Use /dev/urandom instead of /dev/random
bind-tools gost Enables gost OpenSSL engine support
gssapi Enable gssapi support
urandom Use /dev/urandom instead of /dev/random
ddclient hardened Use iproute2 instead of ifconfig to grab an IP address
ssl Connect to the server utilizing SSL
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.
script Enable support for calling scripts when leases change.
tftp Enables built in TFTP server for netbooting.
knot fastparser Enables fast DNS zone parser.
ldns-utils dane Enable DNS-based Authentication of Named Entities (DANE) support
ecdsa Enable ECDSA support
gost Enable GOST support
maradns authonly Allows one to build only authoritative DNS server
mydns alias Enable David Phillips aliasing
status Enable the STATUS opcode to check server status
nsd bind8-stats Enables BIND8 like NSTATS and XSTATS
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
zone-stats Enable per-zone statistics logging, 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 botan Make it possible to use the dev-libs/botan library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
cryptopp Make it possible to use the dev-libs/crypto++ library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
mydns Making it possible to use a MyDNS MySQL database with PowerDNS (not recommended for new deployments).
opendbx Use a database supported by dev-db/opendbx as backend.
remote Use a generic socket or pipe as a backend (via JSON RPC requests).
remote-http Enable remote connections to HTTP as backends (via RESTful JSON requests).
tinydns Use a TinyDNS CDB database as backend.
tools Build optional tools (dnsscan, dnsscope, etc..).
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 gost Enable GOST support

net-firewall

Package Flag Description
arno-iptables-firewall plugins Install optional plugins
firewalld gui Builds and installs GUI configurator and GTK+ applet
fwknop client Build fwknop client
extras Install example apparmor policy
gdbm Replace file digest-cache with gdbm
gpg Enable GPG support via app-crypt/gpgme
server Build fwknopd server
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
ipt_netflow pax_kernel Apply patch needed for pax enabled kernels
iptables netlink Build against libnfnetlink which enables the nfnl_osf util
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
pftop altq Enable altq(4) support — alternate queuing of network packets.
pglinux cron Install cron script
logrotate Install logrotate.d file
ufw-frontends kde Use kdesu to gain root privileges (note: the flag has lower priority than "policykit")
policykit Use pkexec to gain root privileges

net-fs

Package Flag Description
autofs dmalloc Enable debugging with the dmalloc library
hesiod Install hesiod module
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 libcap support
caps-ng libcap-ng support
creds cifs credentials support
cvmfs client Install the cvmfs client programs and init script
server Install the cvmfsd program and init script
netatalk appletalk Build support for Apple's AppleTalk (DDP) protocol and its utilities (atalkd, timelord, papd).
cups Add support for net-print/cups printers in papd. This flag is only considered if appletalk USE flag is enabled, and is otherwise ignored.
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
utils Install afpstats script
nfs-utils libmount Link mount.nfs with libmount
nfsdcld Enable nfsdcld NFSv4 clientid tracking daemon
nfsidmap Enable support for newer nfsidmap helper
nfsv3 Enable support for NFSv3
nfsv4 Enable support for NFSv4
nfsv41 Enable support for NFSv4.1
nonfsv4 Disable support for NFSv4
uuid Support UUID lookups in rpc.mountd
samba addns Enable AD DNS integration
ads Enable Active Directory support
aio Enable asynchronous IO support
client Enables the client part
cluster Enable support for clustering
dmapi Enable support for DMAPI. This currently works only in combination with XFS.
iprint Enabling iPrint technology by Novell
ldb Enable the ldb tools
netapi Enable building of netapi bits
quota Enables support for user quotas
server Enables the server part
smbclient Enable smbclient tool
smbsharemodes Enable special smb share modes (?)
smbtav2 Enable Samba Traffic Analyzer version 2
swat Enables support for swat configuration gui
winbind Enables support for the winbind auth daemon
smbnetfs gnome Use the gnome-base/gnome-keyring for password management.

net-ftp

Package Flag Description
frox transparent Enable transparent proxying of data connections
lftp convert-mozilla-cookies Install the convert-mozilla-cookies script and its run-time dependencies
openssl Use dev-libs/openssl for SSL connections
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
linguas_bg_BG Language support for bg_BG
linguas_fr_FR Language support for fr_FR
linguas_it_IT Language support for it_IT
linguas_ja_JP Language support for ja_JP
linguas_ru_RU Language support for ru_RU
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.
openssl Enable dev-libs/openssl support
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
softquota Enable support for the quotatab module
trace Build with trace support. Should not be enabled on production servers
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
charconv Enables charset conversion
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)
yafc ssh Build with SFTP support

net-im

Package Flag Description
ayttm irc Enable Internet Relay Chat support
lj Enable livejournal.com support
smtp Adds support for sending messages via RFC2821 SMTP
webcam Adds webcam support for Yahoo Messenger
bitlbee libevent Use libevent for event handling
nss Use NSS for SSL support in MSN and Jabber
otr Enable support for encrypted conversations
plugins Enable support for plugins
purple Use libpurple instead of the built-in IM protocol support
skype Enable Skype support
twitter Enable Twitter protocol support
centerim gadu Enable support for the Gadu-Gadu protocol
irc Enable support for the IRC protocol
lj Enable support for the LiveJournal weblog system
otr Enable encrypted conversations
climm otr Enable encrypted conversations
ejabberd captcha Support for CAPTCHA Forms (XEP-158)
mod_irc Build irc gateway
mod_muc Build Multi User Chat module
mod_proxy65 Support for SOCKS5 Bytestreams (XEP-0065)
mod_pubsub Build Pubsub module
mod_statsdx Measures several statistics, and provides a new section in ejabberd Web Admin to view them.
web Enable web admin interface
ekg2 gadu Enable Gadu-Gadu protocol support (requires net-libs/libgadu).
gif GIF token support for Gadu-Gadu protocol.
gnutls Enable SSL/TLS support through GnuTLS for the plugins supporting it. If 'ssl' is enabled too, GnuTLS will be preferred where possible (and OpenSSL will be used elsewhere).
gpg Enable jabber message encryption through app-crypt/gpgme.
jpeg JPEG token support for Gadu-Gadu protocol.
minimal Disable building extra plugins with no additional deps.
openssl Support encryption in sim plugin, using OpenSSL.
oracle Support logging messages into Oracle database.
sqlite Support logging messages into SQLite2 database. If 'sqlite3' is set too, it will be used instead.
sqlite2 Prefer SQLite2 over SQLite3 (if USE=sqlite is set).
sqlite3 Support logging messages into SQLite3 database. If 'sqlite' is set too, SQLite3 will be used.
ssl Enable the complete SSL/TLS support through OpenSSL. This also enables the 'sim' plugin which relies on OpenSSL.
empathy geoloc Enable geolocation support through app-misc/geoclue
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
nautilus Enable nautilus-sendto support
webkit Build support for Adium-style HTML-based conversation window themes using net-libs/webkit-gtk
err irc Pull optional dependencies, needed for IRC backend
plugins Enable support for installing plugins with dev-vcs/git
gajim idle Enable idle module
srv SRV capabilities
xhtml Enable XHTML support
jabberd2 experimental Enable experimental features such as TLS Everywhere.
memdebug Enable nad and pool debug. Requires USE="debug" to be set.
kadu gadu Enables Gadu communication protocol
mpd Enables Music Player Daemon support
phonon Enables phonon audio plugin
sdk Install Kadu SDK (cmake module, API headers)
speech Enables speech module
kmess konqueror Enable integration with konqueror
libnotify Enable desktop notifications using the knotify library
ktp-accounts-kcm modemmanager Enable support for mobile broadband devices
licq aosd Build the advanced on screen display plugin.
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
mxit Enable mxit protocol support
ncurses Build finch, console interface
prediction Enable Contact Availability Prediction plugin
python Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support
silc Enable SILC protocol support
xscreensaver Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
zephyr Enable Zephyr protocol support
prosody jit Use LuaJIT instead of vanilla Lua
libevent Use libevent for event handling
zlib Support for compressing XMPP streams with mod_compression
psi enchant Use enchant spell engine instead of aspell
extras Enables extra non official patches
iconsets Install additional iconsets, some of them has not clear licensing
plugins Enable plugins support
powersave Disable some non critical timers for much less CPU usage
webkit Enable chatlog rendering using webkit
whiteboarding Enable experimental interactive SVG drawing
xscreensaver Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
psimedia demo build simple test application for the PsiMedia system
pyaim-t webinterface Install dependencies needed for the web interface
pyicq-t webinterface Install dependencies needed for the web interface
qutim aspell Enable spellchecking using app-text/aspell
awn Enable integration with gnome-extra/avant-window-navigator
crypt Enable AES crypto plugin
histman Enable history importer plugin
hunspell Enable spellchecking using app-text/hunspell
irc Enable IRC protocol support
kinetic Enable Growl-like kinetic popups plugin
mrim Enable mail.ru protocol support
multimedia Add sound support via dev-qt/qtmultimedia
otr Enable plugin for encrypted conversations (Off-The-Record messaging)
phonon Add sound support via media-libs/phonon or dev-qt/qtphonon
purple Enable libpurple-based protocol support
qml Enable QtQuick-based chat plugin
sdl Add sound support via media-libs/sdl-mixer
vkontakte Enable vkontakte protocol support
webkit Enable Adium-like WebView plugin
xscreensaver Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
skype pax_kernel Triggers a paxmarking of the main skype binary
qt-static Install the main skype binary with internal copy of Qt
telepathy-connection-managers irc Enable Internet Relay Chat (IRC) support.
jabber Enable XMPP protocol handler (this is also Google Talk).
sip Enable SIP/SIMPLE messaging and calling.
sipe Enable Sip Exchange Protocol.
yahoo Enable Yahoo! messaging support.
zeroconf Enable Link-Local Messaging via the zeroconf or Bonjour protocol.
telepathy-mission-control systemd Rely on systemd's logind to detect suspend and resume
tkabber plugins Enables installation the extra plugins
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 recieve 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
vcs-revision Add VCS revision to version number, INSECURE.
xmppuriqueries Allow other plugins to handle XMPP URI queries

net-irc

Package Flag Description
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
bip freenode Enables freenode-specific functionality. Currently that is only support for mute lists (MODE #channel +q).
noctcp Disable the automatic CTCP VERSION reply which is often exploited by malicious people to cause a DoS (reconnect due to flooding).
oidentd Enable oidentd support
charybdis largenet Enable support/tweaks for large networks
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 fastscroll Make scrolling of large text buffers faster by circumventing some of pango's overhead
gtkspell Use app-text/gtkspell for spell checking instead of static method (needs spell)
libcanberra Enable sound event support using media-libs/libcanberra
libproxy Enable proxy support.
ntlm Enable NTLM authentication
plugin-checksum Build Checksum plugin (needs plugins)
plugin-doat Build Do At plugin (needs plugins)
plugin-fishlim Build FiSHLiM plugin (needs plugins )
plugin-sysinfo Build SysInfo plugin (needs plugins)
plugins Enable plugin support and installs some built-in plugins
sexy Use x11-libs/libsexy for spell checking instead of static method (needs spell)
theme-manager Build the theme manager (mono)
inspircd geoip Add geoip support for country and city lookup based on IPs
gnutls Enable TLS support
ipv6 Enable support for IP version 6
ldap Enable LDAP support
mysql Enable MySQL database backend
pcre Adds support for Perl Compatible Regular Expressions
posix Adds support for POSIX-compatible functions
postgres Enable PostgreSQL database backend
sqlite Enable Sqlite database backend
ssl Enable SSL support
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 proxy Adds support for a loadable IRC proxy module
kvirc dcc_video Support video connections over DCC protocol
dcc_voice Support voice connections over DCC protocol
ipc Support inter-process communication between KVIrc processes
phonon Support Phonon for audio output
qt-dbus Support Qt-DBus
transparency Support pseudo-transparency
ngircd ident Enables support for net-libs/libident
psybnc multinetwork Adds support for multiple networks
oidentd Adds support for oidentd
scripting Adds scripting support
quassel X Build the Qt 4 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.
crypt Support core->network per-channel and per-query blowfish encryption via app-crypt/qca:2.
monolithic Build Standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use quassels client/server model. The server and X flags are not needed in this case but it is possible to enable them too.
phonon Build client with phonon backend support. This enables sound playback in client.
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.
webkit Use qt-webkit rendering engine for showing URL thumbnails and for other things that need web browser integration.
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.
dict Add dependency over dev-ruby/ruby-dict, which is needed to enable the "dict" 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.
shadowircd largenet Enable support/tweaks for large networks
srvx bahamut Choose bahamut protocol over p10 protocol
supybot twisted Allows supybot to use dev-python/twisted as driver
unrealircd 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 Support displaying channel modes in /list
shunnotices Enable notifying a user when un-shunned
spoof Enable the spoof protection
topicisnuhost Enable displaying nick!user@host as topic setter
usermod Enable /set* and /chg* commands
weechat alias Enable plugin for alias control.
charset Enable encoding conversions.
fifo Enable FIFO support (sh pipes).
irc Enable IRC protocol support.
logger Enable support for logging.
relay Enable relay plugin (experimental)
rmodifier Enable rmodifier plugin.
scripts Build infrastructure for scripting.
xfer Enable xfer plugin support.
znc daemon Allow znc to run as a system-wide service. Installs an init script and creates a znc user:group.

net-libs

Package Flag Description
aqbanking chipcard Enable support for DDV/RSA-chipcards
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
courier-authlib vpopmail Enable vpopmail support
cvm vpopmail Enable vpopmail support
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.
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 bindist Disallow building LZO support, because of a license incompatibility with dev-libs/lzo.
crywrap Build the crywrap TLS proxy service
dane Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound.
nettle Use dev-libs/nettle as crypto backend
pkcs11 Add support for PKCS#11 through app-crypt/p11-kit
gtk-vnc gtk3 Build the gtk3 gtk-vnc library and other gtk3 assets
introspection Use dev-libs/gobject-introspection for introspection
vala Enable bindings for dev-lang/vala
gupnp-igd introspection Use dev-libs/gobject-introspection for introspection
h323plus aec Enable acoustic echo cancellation
sound Enable audio codecs
video Enable video codecs
iax snomhack Use slower memset for SNOM phoneem
ldns dane Enable DNS-based Authentication of Named Entities (DANE) support
ecdsa Enable ECDSA support
gost Enable GOST support
libbtbb pcap Add support for network packet capture via net-libs/libpcap
wireshark-plugins Build the wireshark plugins for bluetooth baseband sniffing
libcrafter pcap Use net-libs/libpcap for packet capturing
libeXosip srv enable support for SRV records DNS queries
libesmtp ntlm Enable support for NTLM authentication
libetpan liblockfile Enable support for liblockfile library
libgsasl gcrypt Use dev-libs/libgcrypt for low-level crypto
ntlm Add support for Microsoft's NTLM mechanism using net-libs/libntlm
libinfinity server Build and install the server binary including init.d/conf.d-scripts. Needed if you want to host an infinote server for gobby.
libkgapi oldpim Allow the use of non-akonadi kdepim-4.4
libkolabxml csharp Enable C# language bindings
libmicrohttpd epoll use epoll() system call
messages enable error messages
libnftnl json Supports parsing of JSON
libnids glib Use dev-libs/glib for multiprocessing support
libnet Include code requiring net-libs/libnet
libnm-qt modemmanager Enable support for mobile broadband devices
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.
libosmocore embedded Build for embedded use and disable unsupported features
libpcap canusb Use virtual/libusb to support Controller Area Network over USB (CAN USB)
netlink Use dev-libs/libnl to put wireless interfaces in monitor mode.
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
libsocialweb connman Use net-misc/connman for getting network connection status information
gnome Extract proxy information using net-libs/libsoup
libsoup 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
syslog Use syslog for error messages
libssh gcrypt Prefer dev-libs/libgcrypt over dev-libs/openssl for encryption
gssapi Enable gssapi support
pcap Build with PCAP output support
server Build with SSH server support
sftp Build with SFTP support
ssh1 Build with SSH1 support
libssh2 gcrypt Use dev-libs/libgcrypt for crypto
libvncserver 24bpp enable 24bpp support
gcrypt enable support for gcrypt
no24bpp disable 24bpp support
loudmouth asyncns Use libasyncns for asynchronous name resolution.
neon libproxy Add support for net-libs/libproxy
pkcs11 Add support for PKCS#11 using dev-libs/pakchois
netembryo sctp Support for Stream Control Transmission Protocol
nodejs npm Enable NPM package manager
snapshot Enable snapshot creation for faster startup
opal capi Enable CAPI support
celt Enable CELT ultra-low delay audio codec
dtmf Enable DTMF encoding/decoding support
fax Enable T.38 FAX protocol
h224 Enable H.224 real time control protocol
h281 Enable H.281 Far-End Camera Control protocol
h323 Enable H.323 protocol
iax Enable Inter-Asterisk eXchange protocol
ilbc Enable iLBC (RFC 3951) speech codec
ivr Enable Interactive Voice Response
ixj Enable xJack cards support
lid Enable Line Interface Device
plugins Enable plugins support
sbc Enable the Bluetooth low-complexity, SubBand Codec
sip Enable Session Initiation Protocol
sipim Enable SIP Instant Messages session
srtp Enable Secure Real-time Transport Protocol
stats Enable statistic reporting
swig Use swig to generate bindings
video Enable video support
vpb Enable Voicetronics VPB card support
vxml Enable VXML support
wav Enable WAVFILE support
x264-static Install x264 plugin statically linked with x264
ortp ntp-timestamp Turn on NTP timestamping on received packet
srtp Add support for Secure RTP
phodav spice Install the spice-webdavd guest agent
pjsip cli Installs pjsua, a simple command-line SIP client
epoll epoll system call support
ext-sound External sound device support
g711 Builds the G711 codec
g722 Builds the G722 codec
g7221 Builds the G7221 codec
ilbc Builds the ilbc codec
l16 Builds the L16 codec
polarssl havege Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments
programs Build PolarSSL programs
ptlib asn Enable ASN decoding/encoding support
dtmf Enable DTMF encoding/decoding support
http Enable HTTP support
mail Enable mail protocols (POP3/SMTP)
qos Enable QOS support
remote Enable remote connection support
serial Enable serial port support
shmvideo Enable shared memory video devices
socks Enable SOCKS protocol support
stun Enable STUN support
telnet Enable telnet protocol support
tts Enable Text-To-Speech server support
video Enable video support
vxml Enable VoiceXML support
wav Enable WAVFILE support
qxmpp vpx Enable VP8 codec support via media-libs/libvpx
rabbitmq-c tools Builds cli tools to interact with brokers
rest gnome Extract proxy information using net-libs/libsoup-gnome
telepathy-glib vala Enable bindings for dev-lang/vala
telepathy-qt farstream Enable support for audio/video calls via farstream
udns tools Build and install dnsget, ex-rdns and rblcheck tools
webkit-gtk coverage Enable code coverage support
egl Enable EGL support.
geoloc Enable geolocation support through app-misc/geoclue
gles2 Enable GLESv2 support.
libsecret Enable libsecret support to store login credentials
webgl Build support for the WebGL HTML API using virtual/opengl
wt extjs Build Wt Ext library with JavaScript-only widgets (http://extjs.com/)
fcgi Compile in FCGI connector
graphicsmagick Enable GraphicsMagick, for supporting painting to raster images (PNG, GIF, ...) (WRasterImage)
resources Install resources directory
server Compile in stand-alone httpd connector
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
zeromq pgm 0MQ is build with 'Pragmatic General Multicast' (RFC 3208) support using the excellent OpenPGM implementation.

net-mail

Package Flag Description
amavis-logwatch logwatch Install filters for use with sys-apps/logwatch.
automx memcached Enable memcached support
sql Enable support for SQL backends
tools Install additional automx-test tool
courier-imap trashquota include deleted messages, and the Trash folder, in the estimated quota usage for maildirs
cyrus-imapd replication Enable replication support in the cyrus imap server
sieve Enable sieve support
dbmail sieve Enable sieve filter support
dovecot cydir Add cydir storage support
imapc Add imap client storage support
lucene Add lucene full text search (FTS) support using dev-cpp/clucene
lz4 Add support for lz4 (de)compression
lzma Add support for lzma (de)compression
managesieve Add managesieve protocol support
mdbox Add mdbox storage support
pop3c Add pop3 client storage support
sdbox Add sdbox storage support
sieve Add sieve support
solr Add solr full text search (FTS) support
vpopmail Add vpopmail support
fdm courierauth Add support for Courier authentication library
fetchmail hesiod Enable support for hesiod
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
hotwayd smtp Build SMTP proxy (hotsmtpd)
lbdb abook Enables app-misc/abook support
finger Enables finger support
libpst dii enable dii support
mailutils clients Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh
servers Build server programs - imap4d pop3d comsatd
tokyocabinet Enable Tokyo Cabinet database support
mairix gnus Add support for the marks propagation feature in app-emacs/gnus
mu emacs Install the mu4e mail client.
gui Build and install the experimental gui 'mug'.
notmuch crypt Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption
doc Install API documentation for enabled bindings
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/)
pick Experimental threaded message view for the emacs interface
offlineimap sqlite Enable runtime support for sqlite mail status backend.
postfix-logwatch logwatch Install filters for use with sys-apps/logwatch.
qmailadmin maildrop Filter spam using maildrop
qpopper apop Enables the pop.auth file in /etc/pop.auth
drac Enables DRAC support
mailbox Enables mail spool file is in home directory ~/Mailbox
tpop3d authexternal Enable authentication by an external program
drac Enable dynamic relay support in the tpop3d pop3 server
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
uw-imap clearpasswd Enables cleartext logins outside of SSL sessions
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

Package Flag Description
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.
jemalloc Use dev-libs/jemalloc to replace the malloc() implementation with a possibly faster one
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 and dev-libs/gmp for bittorrent/metalink crypto instead of dev-libs/libgcrypt (when dev-libs/openssl is not being used).
scripts Install additional scripts which use aria2's xmlrpc functionality.
asterisk ais Support clustering using the Application Interface Specification framework
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
osplookup Support secure peering using the Open Settlement Protocol
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)
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.
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.
batman-adv bla B.A.T.M.A.N. bridge loop avoidance
dat B.A.T.M.A.N. distributed arp table
mcast B.A.T.M.A.N. multicast optimizations
nc B.A.T.M.A.N. network coding
bfgminer adl Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
antminer Enable support for mining with AntMiner U1 sticks
avalon Enable support for mining with Avalon 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
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
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
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)
padlock Enable support for mining with VIA Padlock CPUs
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
sse2_4way Enable support for CPU SSE2 4way mining algorithm
sse4 Enable support for CPU SSE4 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
cfengine html Install HTML documentation
libvirt Enable support for virtual machine management through app-emulation/libvirt
qdbm Use dev-db/qdbm as database backend
tests Install test files
tokyocabinet Use dev-db/tokyocabinet as database backend
cgminer adl Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
ants1 Enable support for Antminer S1 Bitmain
ants2 Enable support for Antminer S2 Bitmain
avalon Enable support for Avalon ASICs
avalon2 Enable support for Avalon2 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
cointerra Enable support for mining with Cointerra ASICs
drillbit Enable support for mining with Drillbit BitFury ASICs
hashfast Enable support for mining with Hashfast
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
opencl Enable support for mining with OpenCL-capable devices (GPUs)
scrypt Enable support for scrypt mining algorithm
spondoolies Enable support for Spondoolies
chrony rtc Include support for the Linux Real Time Clock interface
connman ethernet Enable ethernet support.
ofono Use net-misc/ofono for telephony support.
openconnect Use net-misc/openconnect for VPN support.
openvpn Use net-misc/openvpn for openvpn support.
tools Enable testing tools.
vpnc Use net-misc/vpnc for cisco VPN support.
csync sftp Enable sftp transfer support via net-libs/libssh
curl metalink Enable metalink support
rtmp Enable RTMP Streaming Media support
ssh Enabled SSH urls in curl using libssh2
ssl Enable crypto engine support (via openssl if USE='-gnutls -nss')
dahdi flash Support (short) flash on FXS
dahdi-tools ppp Enables PPP/DAHDIRAS support
dhcp client Install the dhclient program
server Install the dhcpd and dhcrelay programs
directvnc dmalloc Enable debugging with the dmalloc library
mouse Adds mouse support
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
dropbox librsync-bundled Use bundled librsync library
electrum qrcode Enable QR code scanning with media-gfx/zbar/
fatrat bittorrent Use the bittorrent protocol via net-libs/rb_libtorrent.
webinterface Enable builtin webinterface.
flexget transmission Support comminucation with net-p2p/transmission
freerdp channels Build virtual channel plugins
client Build client binaries
server Build server binaries
gsasl gcrypt Use dev-libs/libgcrypt for low-level crypto
ntlm Add support for Microsoft's NTLM mechanism using net-libs/libntlm
guacamole-server ssh enable support for ssh connections
gwget epiphany Build epiphany extensions
hotot chrome Build chrome browser extension
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.
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
libreswan dnssec Use DNSSEC resolver (requires net-dns/unbound
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
json Enable JSON output via Jansson
lldpmed Enable LLDP-MED extension
seccomp Enable use of libseccomp for system call filtering
snmp Enable the use of SNMP
sonmp Enable SynOptics Network Management
mediatomb curl Support YouTube and external media sources (e.g. internet radio)
id3tag Use media-libs/libid3tag for reading files' metadata rather than taglib
inotify Enable inotify filesystem monitoring support
lastfm Enable last.fm support
libextractor Use libextractor to gather files' metadata
magic Use libmagic to determine file types
mysql Use dev-db/mysql as backend rather than SQLite3
taglib Use media-libs/taglib for reading files' metadata rather than id3lib
thumbnail Enables video thumbnails generation throughmedia-video/ffmpegthumbnailer
memcached slabs-reassign Allow manual reassignment of memory slabs at the cost of slab optimizations.
minidlna netgear Enable netgear branding
readynas Enable readynas branding
modemmanager mbim Enable MBIM modem protocol
qmi Enable support for the QMI modem protocol used by devices with Qualcomm chipsets
qmi-newest Avoid deprecated QMI commands. Warning: may cause incompatibility with older devices.
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
mulk checksum Enable checksum verification for Metalink from dev-libs/openssl
metalink Enable support for media-libs/libmetalink
ncp diet Compile against dev-libs/dietlibc
networkmanager connection-sharing Use net-dns/dnsmasq and net-firewall/iptables for connection sharing
consolekit Use sys-auth/consolekit for session tracking
dhclient Use dhclient from net-misc/dhcp for getting ip
dhcpcd Use net-misc/dhcpcd for getting ip
modemmanager Enable support for mobile broadband devices using net-misc/modemmanager
nss Use dev-libs/nss for cryptography
ppp Enable support for mobile broadband and PPPoE connections using net-dialup/ppp
resolvconf Use net-dns/openresolv for managing DNS information
vala Enable bindings for dev-lang/vala
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 using net-wireless/wpa_supplicant
wimax Enable support for WiMAX connections using net-wireless/wimax
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)
nxcl nxclient Use nxssh from net-misc/nxclient instead of standard ssh
nxserver-freenx nxclient Allow to install net-misc/nxclient in parallel with this package, using it to display messages in the sessions
ocsync sftp Enable sftp transfer support via net-libs/libssh
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
openconnect gssapi Build GSSAPI support.
java Build JNI bindings using jni.h
libproxy Enable proxy support.
openssh X509 Adds support for X.509 certificate authentication
bindist Disable EC/RC5 algorithms in OpenSSL for patent reasons.
hpn Enable high performance ssh
ldap Add support for storing SSH public keys in LDAP
ldns Use LDNS for DNSSEC/SSHFP validation.
openswan curl Include curl support (used for fetching CRLs)
extra-algorithms Include additional strong algorithms (Blowfish, Twofish, Serpent and SHA2)
ldap Include LDAP support (used for fetching CRLs)
ms-bad-proposal Allow bad IP address proposal offered by an Microsoft L2TP/IPSec servers
nocrypto-algorithms Include algorithms that don't even encrypt (1DES)
nss Include libnss support (adds smartcard support)
ssl Use OpenSSL libraries for BIGNUM support
weak-algorithms Include weak algorithms (DH1)
openvpn down-root Enable the down-root plugin
iproute2 Enabled iproute2 support instead of net-tools
passwordsave Enables openvpn to save passwords
pkcs11 Enable PKCS#11 smartcard support
plugins Enable the OpenVPN plugin system
polarssl Use PolarSSL instead of OpenSSL
openvswitch monitor Build the Python and GUI dependent monitor applications
pyside Use dev-python/pyside instead of dev-python/PyQt4 for Python/Qt-bindings when building with USE=monitor.
owncloud-client sftp Enable sftp transfer support via net-libs/libssh
pavuk hammer Turn on chunky/hammer mode (DoS) in pavuk: when specified, pavuk will include features to stress test web sites using an ultrahigh performancereplay mechanism
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
putty gtk Build the PuTTY client which requires x11-libs/gtk+:2. Otherwise only the CLI tools puttygen, plink, pscp and psftp will be built.
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
multipath Enable multipath routes support for any number of routes
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
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
rancid-git git Enable git (version control system) support
rdesktop kerberos Enable CredSPP support + Kerberos authentication with net-libs/libgssglue
pcsc-lite Enable smartcard support with sys-apps/pcsc-lite driver
remmina freerdp Add support for the net-misc/freerdp application
ssh Enable support for SSH/SFTP protocol; see also 'vte'
telepathy Enable telepathy support
vte Enable virtual terminal support (for SSH sessions)
rygel tracker Install dependencies for the tracker plugin
transcode Install dependencies for transcoding support
scponly 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
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
slimrat X Install also GUI client
spice-gtk dbus Support for desktop integration such as automounting and other APIs exposed by your DE via D-Bus
gtk3 Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
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
vala Generate dev-lang/vala bindings using vapigen and regenerate .vala files using valac
webdav Support for folder-sharing between guest and client using net-libs/phodav
stargazer debug Enable extra debug codepaths, like asserts and extra output.
doc Adds extra documentation (API, doc, etc).
examples Install examples, usually source code.
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.
static-libs Install static libraries.
streamtuner shout Enable shoutcast plug-in.
xiph Enable xiph.org plug-in.
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 is 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".
stunnel listen-queue Enable Listen Queue support for Stunnel
xforward Enable X-Forwarded-For support for Stunnel
teamviewer system-wine Use app-emulation/wine instead of bundled one.
termpkg uucp Adds support for uucp style device locking
tigervnc internal-fltk Build+link internal and enhanced fltk library
server Build TigerVNC server
xorgmodule Build the Xorg module
tightvnc server Build vncserver. Allows us to only build server on one machine if set, build only viewer otherwise.
tinc gcrypt Add support for encrypted log files using dev-libs/libgcrypt
gui Add GUI support, using dev-python/wxpython
openssl Using dev-libs/openssl for cryptography-related functions
uml Enable support for User Mode Linux Sockets
vde Enable Virtual Distributed Ethernet (VDE) based networking
tor bufferevents Use libevent's buffered IO implementation (unstable, buggy)
ecc Enable Elliptical Curve Cyptography
nat-pmp Enable NAT Port Mapping Protocol
stats Enable to keep track of how much of each kind of resource we download
tor-hardening Compile tor with hardening on vanilla compilers/linkers
transparent-proxy Enable transparent proxying
web Build a tor2web service instead of a tor client
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.
vidalia tor Allow to use a local tor setup
vinagre applet Enable vinagre applet for gnome-base/gnome-panel
rdp Enable access to Windows RDP protocol using net-misc/rdesktop
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
vpnc bindist Using GnuTLS for SSL support as redistribution with OpenSSL as provider violates GPL
resolvconf Enable support for DNS managing framework net-dns/openresolv
wget 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)
wicd ambiance Install icons from Ubuntu's ambiance theme
gtk Installs a gtk UI. This is enabled by default because it is intended behavior. Requires dev-python/pygtk
ioctl Installs additional python libraries to use as a backend. This will improve speed but is experimental.
mac4lin Change default icons to mac4lin icon set
ncurses Installs a ncurses UI
pm-utils Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
x2goserver fuse Use sys-fs/sshfs-fuse to allow shared folders
yaydl soundextract Extract the soundtracks of the downloaded videos

net-nds

Package Flag Description
389-ds-base auto-dn-suffix Enable auto bind with auto dn suffix over unix domain socket (LDAPI) support
autobind Enable auto bind over unix domain socket (LDAPI) support
bitwise Enable bitwise plugin - supported data in raw/bitwise format
dna Enable dna (distributed numeric assignment ) plugin - to automatically assign unique uid numbers to new user entries as they are created.
ldapi Enable LDAP over unix domain socket (LDAPI) support
pam-passthru Enable pam-passthru plugin - for simple and fast system services used in ldap
presence Enable presence plugin - non-stabdart syntax validation
gosa-core mail Manage mail accounts and servers with gosa.
samba Manage samba accounts with gosa.
ldapvi gnutls Use net-libs/gnutls instead of dev-libs/openssl
nsscache nsscache Depend on sys-auth/libnss-cache to handle flat files
nssdb Depend on sys-libs/libnss_db to handle dbm files.
openldap experimental Enable experimental backend options
minimal Build libraries & userspace tools only. Does not install any server code.
odbc Enable ODBC and SQL backend options
overlays Enable contributed OpenLDAP overlays
smbkrb5passwd Enable overlay for syncing ldap, unix and lanman passwords
rpcbind 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

Package Flag Description
liferea libnotify Enable popup notifications
quiterss phonon Enable sound support via media-libs/phonon or dev-qt/qtphonon

net-nntp

Package Flag Description
inn innkeywords Enable automatic keyword generation support
inntaggedhash Use tagged hash table for history (disables large file support)
nzbget parcheck Enable support for checking PAR archives
sabnzbd rar Add support for extracting rar files
ssl Add support for SSL web interface
unzip Add support for extracting zip files
yenc Use yenc to speed up nntp encoding and decoding
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
evil Let tin generate a message ID
forgery Cancel messages posted from a different account
gpg Enable app-crypt/gpg support

net-p2p

Package Flag Description
amule daemon Enable amule daemon
remote Enable remote controlling of the client
stats Enable statistic reporting
bitcoin-qt 1stclassmsg Enable first-class Bitcoin message tools
qrcode Enable generation of QR Codes for receiving payments
bitcoind logrotate Use app-admin/logrotate for rotating logs
datacoin-hp logrotate Use app-admin/logrotate for rotating logs
dbhub switch_user Enable support for switching user
deluge setproctitle Install dependencies needed for beautifying the process name
webinterface Install dependencies needed for the web interface
dogecoin-qt qrcode Enable generation of QR Codes for receiving payments
eiskaltdcpp cli Enable sample cli based on readline
daemon Enable eiskaltdcpp-daemon
dht Enable DHT (distributed hash table) support for libeiskaltdcpp
emoticons Install emoticon packs
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
gift ares pull in Ares plugin
fasttrack pull in FastTrack plugin
gnutella pull in Gnutella plugin
openft pull in OpenFT plugin
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
webinterface Allows control of KTorrent via a web interface
zeroconf Discover peers on the local network using the Zeroconf protocol
litecoin-qt qrcode Enable generation of QR Codes for receiving payments
litecoind logrotate Use app-admin/logrotate for rotating logs
mldonkey bittorrent enable bittorrent support
fasttrack enable fasttrack support
gnutella enable gnutella and gnutella2 support
guionly enable client build only
magic enable use of libmagic
ppcoin-qt qrcode Enable generation of QR Codes for receiving payments
ppcoind logrotate Use app-admin/logrotate for rotating logs
primecoin-qt qrcode Enable generation of QR Codes for receiving payments
primecoind logrotate Use app-admin/logrotate for rotating logs
retroshare cli Enables the CLI version of RetroShare
feedreader Enables the Feedreader plugin
links-cloud Enables LinkClouds plugin
qt4 Enables the GUI using qt4
voip Enables VOIP plugin
rtorrent color Add custom color support for torrent list
daemon Uses app-misc/screen to daemonize this application
transmission lightweight Optimize transmission for low-resource systems (smaller cache size, prefer unencrypted peer connections, etc.)
xfs Enable XFS filesystem capabilities by using sys-fs/xfsprogs headers (in building of fdlimit(.c))
transmission-remote-cli rdns Enable support for host name resolution
transmission-remote-gtk libproxy Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration.
unique Enable single instance support using dev-libs/libunique
tribler vlc Enable vlc support.

net-print

Package Flag Description
cups java Add support for the Java interpeter in the web server CGIs.
lprng-compat Do not install lp... binaries so cups and lprng can coexist.
python Add support for the Python interpeter in the web server CGIs.
cups-filters foomatic Build the included foomatic-rip printer driver. Strongly recommended.
fax4cups capisuite-fax Install net-dialup/capisuite backend
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
doc Build documentation
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:0. Some old printers do not work with virtual/libusb: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
qt4 Enable graphical interface using Qt 4
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
magicfilter lprng-failsafe Refuse options for compability with certain LPRng versions.

net-proxy

Package Flag Description
dansguardian avast Enable support for the AvastD content scanner.
backtrace Enable logging a backtrace when a segmentation fault occurs.
clamav Enable support for the ClamD content scanner.
commandline Enable support for command-line content scanners.
email Enable support for email reporting functionality.
fancydm Enable support for the fancy download manager.
icap Enable support for ICAP AV server content scanner.
kaspersky Enable support for the Kaspersky AV daemon content scanner.
lfs Enable large file support on 32 bit systems.
logrotate Use app-admin/logrotate for rotating logs.
ntlm Enable support for the NTLM auth plugin.
orig-ip Enable support for checking the client's original destination IP address against HTTP request details when deployed as a transparent proxy (US-CERT VU#435052).
trickledm Enable support for the trickle download manager.
haproxy tools Install additional tools (halog, iprange).
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
icap-client Adds ICAP client support
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
sshproxy client-only Install only the client wrappers
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
tsocks tordns Apply tordns patch which allows transparent TORification of the DNS queries
ufdbguard doc Download and install the ufdbguard reference manual in PDF.
httpd Build, install and start the provided mini-http daemon with the redirect CGI integrated. Since there is no way to tell ufdbguard to not start it, this is a build-time option.

net-voip

Package Flag Description
ekiga gconf Enable GConf support
h323 Enable H.323 protocol
shm Enable the Shared Memory Extension from libXext
static Statically link to opal and ptlib
xcap Enable XML Configuration Access Protocal
gnugk ssh Enable support for SSH port forwarding using net-libs/libssh
linphone assistant Turn on assistant compiling (needs gtk enabled)
gsm-nonstandard Support non-standard GSM frequencies
sqlite Turn on compilation of message storage
tools Compile tools
video Enable video support (display/capture)
sflphone doxygen Support for building documentation with doxygen
telepathy-gabble plugins Enable plugin loader
yate amrnb use AMR-NB
dahdi Enable Dahdi driver
gsm use GSM codec
h323 use OpenH323
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
sctp Enable SCTP sockets
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-wireless

Package Flag Description
aircrack-ng airdrop-ng Build airdrop-ng
airgraph-ng Build airgraph-ng
netlink Use netlink for channel control instead of WEXT
unstable Build the "unstable" tools which may randomly fail to run properly
bladerf tecla use libtecla for command line editing, tab completion, and history
bladerf-fpga x115 bitstream for the x115KLE Cyclone IV FPGA bladerf model"
x40 bitstream for the x40KLE Cyclone IV FPGA bladerf model"
blueman gconf Enable the GConf configuration backend
network Add functionality to setup (host) PAN connections using either net-dns/dnsmasq or net-misc/dhcp
sendto Install the sendto-plugin for gnome-base/nautilus
bluez hid2hci The HID proxying makes the keyboard / mouse show up as regular USB HID devices, but needs them to be paired before enabling this, otherwise they won't be detected
obex Enable OBEX transfer