USE флаги

3dfx - Enable support for Voodoo chipsets, also called as 3DFX and TDFX
3dnow - Adds support for 3dnow multimedia processor instructions
a52 - Enables support for decoding ATSC A/52 streams used in DVD
aac - Enables support for MPEG-4 AAC Audio
aalib - Adds support for media-libs/aalib (ASCII-Graphics Library)
accessibility - Adds support for accessibility (eg 'at-spi' library)
acl - Adds support for Access Control Lists
acpi - Adds support for Advanced Configuration and Power Interface
adns - Adds support for the adns DNS client library
afs - Adds OpenAFS support (distributed file system)
aim - Enable AIM IM protocol support
alsa - Adds support for media-libs/alsa-lib (Advanced Linux Sound Architecture)
alsa_cards_ad1816a - Analog Devices SoundPort AD1816A
alsa_cards_ad1848 - Generic AD1848/CS4248 driver
alsa_cards_ad1848-lib - Enable the ad1848-lib driver
alsa_cards_ad1889 - Analog Devices AD1889
alsa_cards_adlib - AdLib FM card
alsa_cards_aica - Sega Dreamcast audio driver
alsa_cards_ali5451 - ALi M5451 PCI Audio Controller
alsa_cards_als100 - Avance Logic ALS100/ALS120
alsa_cards_als300 - Avance Logic ALS300/ALS300+
alsa_cards_als4000 - Avance Logic ALS4000
alsa_cards_aoa - Apple Onboard Audio driver
alsa_cards_aoa-fabric-layout - layout-id fabric
alsa_cards_aoa-onyx - support Onyx chip
alsa_cards_aoa-soundbus - Apple Soundbus support
alsa_cards_aoa-soundbus-i2s - I2S bus support
alsa_cards_aoa-tas - support TAS chips
alsa_cards_aoa-toonie - support Toonie chip
alsa_cards_armaaci - ARM PrimeCell PL041 AC Link support
alsa_cards_asihpi - AudioScience ASIxxxx
alsa_cards_at91-soc - SoC Audio for the Atmel AT91 System-on-Chip
alsa_cards_at91-soc-eti-b1-wm8731 - SoC I2S Audio support for Endrelia ETI-B1 board
alsa_cards_at91-soc-i2s - Enable the at91-soc-i2s driver
alsa_cards_atiixp - ATI IXP AC97 Controller
alsa_cards_atiixp-modem - ATI IXP Modem
alsa_cards_au1x00 - Au1x00 AC97 Port Driver
alsa_cards_au8810 - Aureal Advantage
alsa_cards_au8820 - Aureal Vortex
alsa_cards_au8830 - Aureal Vortex 2
alsa_cards_azt2320 - Aztech Systems AZT2320
alsa_cards_azt3328 - Aztech AZF3328 / PCI168 (EXPERIMENTAL)
alsa_cards_bt87x - Bt87x Audio Capture
alsa_cards_ca0106 - SB Audigy LS / Live 24bit
alsa_cards_cmi8330 - C-Media CMI8330
alsa_cards_cmipci - C-Media 8738, 8338
alsa_cards_cs4231 - Generic Cirrus Logic CS4231 driver
alsa_cards_cs4231-lib - Enable the cs4231-lib driver
alsa_cards_cs4232 - Generic Cirrus Logic CS4232 driver
alsa_cards_cs4236 - Generic Cirrus Logic CS4236+ driver
alsa_cards_cs4281 - Cirrus Logic (Sound Fusion) CS4281
alsa_cards_cs46xx - Cirrus Logic (Sound Fusion) CS4280/CS461x/CS462x/CS463x
alsa_cards_cs5535audio - CS5535/CS5536 Audio
alsa_cards_darla20 - (Echoaudio) Darla20
alsa_cards_darla24 - (Echoaudio) Darla24
alsa_cards_dt019x - Diamond Technologies DT-019X, Avance Logic ALS-007
alsa_cards_dummy - Dummy (/dev/null) soundcard
alsa_cards_echo3g - (Echoaudio) 3G cards
alsa_cards_emi26 - Emagic EMI 2|6 Audio Interface
alsa_cards_emu10k1 - Emu10k1 (SB Live!, Audigy, E-mu APS)
alsa_cards_emu10k1x - Emu10k1X (Dell OEM Version)
alsa_cards_emu1212 - E-MU 1212M PCI
alsa_cards_emu1616 - E-MU 1616 CardBus, 1616m CardBus, 1616 PCI
alsa_cards_emu1820 - E-MU 1820M PCI
alsa_cards_ens1370 - (Creative) Ensoniq AudioPCI 1370
alsa_cards_ens1371 - (Creative) Ensoniq AudioPCI 1371/1373
alsa_cards_es1688 - Generic ESS ES688/ES1688 driver
alsa_cards_es18xx - Generic ESS ES18xx driver
alsa_cards_es1938 - ESS ES1938/1946/1969 (Solo-1)
alsa_cards_es1968 - ESS ES1968/1978 (Maestro-1/2/2E)
alsa_cards_es968 - Generic ESS ES968 driver
alsa_cards_fm801 - ForteMedia FM801
alsa_cards_fm801-tea575x - Enable the fm801-tea575x driver
alsa_cards_gina20 - (Echoaudio) Gina20
alsa_cards_gina24 - (Echoaudio) Gina24
alsa_cards_gusclassic - Gravis UltraSound Classic
alsa_cards_gusextreme - Gravis UltraSound Extreme
alsa_cards_gusmax - Gravis UltraSound MAX
alsa_cards_harmony - Harmony/Vivace sound chip
alsa_cards_hda-intel - Intel HD Audio
alsa_cards_hdsp - RME Hammerfall DSP Audio
alsa_cards_hdspm - RME Hammerfall DSP MADI
alsa_cards_hifier - TempoTec HiFier Fantasia
alsa_cards_hpet - HPET timer interface
alsa_cards_hrtimer - ALSA timer interface
alsa_cards_ice1712 - ICEnsemble ICE1712 (Envy24)
alsa_cards_ice1724 - ICE/VT1724/1720 (Envy24HT/PT)
alsa_cards_indigo - (Echoaudio) Indigo
alsa_cards_indigodj - (Echoaudio) Indigo DJ
alsa_cards_indigoio - (Echoaudio) Indigo IO
alsa_cards_intel8x0 - Intel/SiS/nVidia/AMD/ALi AC97 Controller
alsa_cards_intel8x0m - Intel/SiS/nVidia/AMD MC97 Modem
alsa_cards_interwave - AMD InterWave, Gravis UltraSound PnP
alsa_cards_interwave-stb - AMD InterWave + TEA6330T (UltraSound 32-Pro)
alsa_cards_korg1212 - Korg 1212 IO
alsa_cards_layla20 - (Echoaudio) Layla20
alsa_cards_layla24 - (Echoaudio) Layla24
alsa_cards_loopback - Generic loopback driver (PCM)
alsa_cards_maestro3 - ESS Allegro/Maestro3
alsa_cards_mia - (Echoaudio) Mia
alsa_cards_miro - Miro miroSOUND PCM1pro/PCM12/PCM20radio driver
alsa_cards_mixart - Digigram miXart
alsa_cards_ml403-ac97cr - Xilinx ML403 AC97 Controller Reference
alsa_cards_mona - (Echoaudio) Mona
alsa_cards_mpu401 - Generic MPU-401 UART driver
alsa_cards_msnd-pinnacle - Turtle Beach MultiSound Pinnacle/Fiji driver
alsa_cards_mtpav - MOTU MidiTimePiece AV multiport MIDI
alsa_cards_mts64 - ESI Miditerminal 4140 driver
alsa_cards_nm256 - NeoMagic NM256AV/ZX
alsa_cards_opl3sa2 - Yamaha OPL3-SA2/SA3
alsa_cards_opti92x-ad1848 - OPTi 82C92x - AD1848
alsa_cards_opti92x-cs4231 - OPTi 82C92x - CS4231
alsa_cards_opti93x - OPTi 82C93x
alsa_cards_oxygen - C-Media 8788 (Oxygen)
alsa_cards_oxygen-lib - Enable the oxygen-lib driver
alsa_cards_pc98-cs4232 - NEC PC9800 CS4232 driver
alsa_cards_pcsp - Internal PC speaker support
alsa_cards_pcxhr - Digigram PCXHR
alsa_cards_pdaudiocf - Sound Core PDAudioCF
alsa_cards_pdplus - Sek'D/Marian Prodif Plus
alsa_cards_portman2x4 - Portman 2x4 driver
alsa_cards_powermac - PowerMac (AWACS, DACA, Burgundy, Tumbler, Keywest)
alsa_cards_pxa2xx-ac97 - AC97 driver for the Intel PXA2xx chip
alsa_cards_pxa2xx-i2sound - Enable the pxa2xx-i2sound driver
alsa_cards_pxa2xx-soc - SoC Audio for the Intel PXA2xx chip
alsa_cards_pxa2xx-soc-corgi - SoC Audio support for Sharp Zaurus SL-C7x0
alsa_cards_pxa2xx-soc-e800 - SoC AC97 Audio support for e800
alsa_cards_pxa2xx-soc-poodle - SoC Audio support for Poodle
alsa_cards_pxa2xx-soc-spitz - SoC Audio support for Sharp Zaurus SL-Cxx00
alsa_cards_pxa2xx-soc-tosa - SoC AC97 Audio support for Tosa
alsa_cards_riptide - Conexant Riptide
alsa_cards_rme32 - RME Digi32, 32/8, 32 PRO
alsa_cards_rme96 - RME Digi96, 96/8, 96/8 PRO
alsa_cards_rme9652 - RME Digi9652 (Hammerfall)
alsa_cards_rtctimer - ALSA RTC timer interface
alsa_cards_s3c2410 - S3C24XX Sound core
alsa_cards_s3c2412-soc-i2s - Enable the s3c2412-soc-i2s driver
alsa_cards_s3c24xx-soc-ln2440sbc-alc650 - SoC AC97 Audio support for LN2440SBC - ALC650
alsa_cards_sa11xx-uda1341 - SA11xx UDA1341TS driver (iPaq H3600)
alsa_cards_sb16 - Sound Blaster 16 (PnP)
alsa_cards_sb8 - Sound Blaster 1.0/2.0/Pro (8-bit)
alsa_cards_sbawe - Sound Blaster AWE (32,64) (PnP)
alsa_cards_seq-dummy - Sequencer dummy client
alsa_cards_serialmidi - Generic driver for serial MIDI adapters
alsa_cards_serial-u16550 - UART16550 serial MIDI driver
alsa_cards_sgalaxy - Aztech Sound Galaxy
alsa_cards_sis7019 - SiS 7019 Audio Accelerator
alsa_cards_soc - SoC audio support
alsa_cards_soc-tlv320aic3x - Enable the soc-tlv320aic3x driver
alsa_cards_sonicvibes - S3 SonicVibes
alsa_cards_sscape - Ensoniq SoundScape PnP driver
alsa_cards_sun-amd7930 - Sun AMD7930
alsa_cards_sun-cs4231 - Sun CS4231
alsa_cards_sun-dbri - Sun DBRI
alsa_cards_trident - Trident 4D-Wave DX/NX; SiS 7018
alsa_cards_usb-audio - USB Audio/MIDI driver
alsa_cards_usb-us122l - Tascam US-122L USB driver
alsa_cards_usb-usx2y - Tascam US-122, US-224 and US-428 USB driver
alsa_cards_via82xx - VIA 82C686A/B, 8233/8235 AC97 Controller
alsa_cards_via82xx-modem - VIA 82C686A/B, 8233 based Modems
alsa_cards_virmidi - Virtual MIDI soundcard
alsa_cards_virtuoso - Asus Virtuoso 200 (Xonar)
alsa_cards_vx222 - Digigram VX222
alsa_cards_vxpocket - Digigram VXpocket
alsa_cards_wavefront - Turtle Beach Maui,Tropez,Tropez+ (Wavefront)
alsa_cards_ymfpci - Yamaha YMF724/740/744/754
alsa_pcm_plugins_adpcm - Enable the adpcm internal plugin.
alsa_pcm_plugins_alaw - Enable the alaw internal plugin.
alsa_pcm_plugins_asym - Enable the plugin to create virtual devices with different inputs/outputs
alsa_pcm_plugins_copy - Enable the copy internal plugin.
alsa_pcm_plugins_dmix - Enable the software mixing plugin (for output)
alsa_pcm_plugins_dshare - Enable the dshare internal plugin.
alsa_pcm_plugins_dsnoop - Enable the plugin to allow to processes to get the same input
alsa_pcm_plugins_empty - Enable the empty internal plugin.
alsa_pcm_plugins_extplug - Enable the extplug internal plugin.
alsa_pcm_plugins_file - Enable the plugin to save output to a file
alsa_pcm_plugins_hooks - Enable the hooks internal plugin.
alsa_pcm_plugins_iec958 - Enable the passthrough digital audio plugin
alsa_pcm_plugins_ioplug - Enable the plugin to connect to hardware devices (*important*)
alsa_pcm_plugins_ladspa - Enable the ladspa internal plugin.
alsa_pcm_plugins_lfloat - Enable the lfloat internal plugin.
alsa_pcm_plugins_linear - Enable the linear internal plugin.
alsa_pcm_plugins_meter - Enable the meter internal plugin.
alsa_pcm_plugins_mmap_emul - Enable mmap emulation for ro/wo devices.
alsa_pcm_plugins_mulaw - Enable the mulaw internal plugin.
alsa_pcm_plugins_multi - Enable the multi internal plugin.
alsa_pcm_plugins_null - Enable the discard output plugin
alsa_pcm_plugins_plug - Enable the plugin to connect to other plugins or devices (*important*)
alsa_pcm_plugins_rate - Enable the samplerate conversion plugin
alsa_pcm_plugins_route - Enable the route internal plugin.
alsa_pcm_plugins_share - Enable the share internal plugin.
alsa_pcm_plugins_shm - Enable the Shared Memory plugin (needed to transform an output into an input)
alsa_pcm_plugins_softvol - Enable the software volume control plugin
altivec - Adds support for optimizations for G4 and G5/ppc970 processors
ao - Use libao audio output library for sound playback
apache2 - Add Apache2 support
apache2_modules_actions - Provides for executing CGI scripts based on media type or request method
apache2_modules_alias - Provides for mapping different parts of the host filesystem in the document tree and for URL redirection
apache2_modules_asis - Sends files that contain their own HTTP headers
apache2_modules_auth_basic - Basic authentication
apache2_modules_auth_digest - User authentication using MD5 Digest Authentication
apache2_modules_authn_alias - Provides the ability to create extended authentication providers based on actual providers
apache2_modules_authn_anon - Allows "anonymous" user access to authenticated areas
apache2_modules_authn_dbd - User authentication using an SQL database
apache2_modules_authn_dbm - User authentication using DBM files
apache2_modules_authn_default - Authentication fallback module
apache2_modules_authn_file - User authentication using text files
apache2_modules_authz_dbm - Group authorization using DBM files
apache2_modules_authz_default - Authorization fallback module
apache2_modules_authz_groupfile - Group authorization using plaintext files
apache2_modules_authz_host - Group authorizations based on host (name or IP address)
apache2_modules_authz_owner - Authorization based on file ownership
apache2_modules_authz_user - User Authorization
apache2_modules_autoindex - Generates directory indexes, automatically, similar to the Unix ls command
apache2_modules_cache - Content cache keyed to URIs
apache2_modules_cern_meta - CERN httpd metafile semantics
apache2_modules_cgi - Enable CGI module (used by non-multithreaded MPMs, for eg. prefork)
apache2_modules_cgid - Enable CGI module (used by multithreaded MPMs, for eg. worker)
apache2_modules_charset_lite - Specify character set translation or recoding
apache2_modules_dav - Distributed Authoring and Versioning (WebDAV) functionality
apache2_modules_dav_fs - filesystem provider for mod_dav
apache2_modules_dav_lock - generic locking module for mod_dav
apache2_modules_dbd - Manages SQL database connections
apache2_modules_deflate - Compress content before it is delivered to the client
apache2_modules_dir - Provides for "trailing slash" redirects and serving directory index files
apache2_modules_disk_cache - Content cache storage manager keyed to URIs
apache2_modules_dumpio - Dumps all I/O to error log as desired
apache2_modules_env - Modifies the environment which is passed to CGI scripts and SSI pages
apache2_modules_expires - Generation of Expires and Cache-Control HTTP headers according to user-specified criteria
apache2_modules_ext_filter - Pass the response body through an external program before delivery to the client
apache2_modules_file_cache - Caches a static list of files in memory
apache2_modules_filter - Context-sensitive smart filter configuration module
apache2_modules_headers - Customization of HTTP request and response headers
apache2_modules_ident - RFC 1413 ident lookups
apache2_modules_imagemap - Server-side imagemap processing
apache2_modules_include - Server-parsed html documents (Server Side Includes)
apache2_modules_info - Provides a comprehensive overview of the server configuration
apache2_modules_log_config - Logging of the requests made to the server
apache2_modules_log_forensic - Forensic Logging of the requests made to the server
apache2_modules_logio - Logging of input and output bytes per request
apache2_modules_mem_cache - Content cache keyed to URIs
apache2_modules_mime - Associates the requested filename's extensions with the file's behavior (handlers and filters) and content (mime-type, language, character set and encoding)
apache2_modules_mime_magic - Determines the MIME type of a file by looking at a few bytes of its contents
apache2_modules_negotiation - Provides for content negotiation
apache2_modules_proxy - HTTP/1.1 proxy/gateway server
apache2_modules_proxy_ajp - AJP support module for mod_proxy
apache2_modules_proxy_balancer - mod_proxy extension for load balancing
apache2_modules_proxy_connect - mod_proxy extension for CONNECT request handling
apache2_modules_proxy_ftp - FTP support module for mod_proxy
apache2_modules_proxy_http - HTTP support module for mod_proxy
apache2_modules_proxy_scgi - SCGI gateway module for mod_proxy
apache2_modules_reqtimeout - Set timeout and minimum data rate for receiving requests
apache2_modules_rewrite - Provides a rule-based rewriting engine to rewrite requested URLs on the fly
apache2_modules_setenvif - Allows the setting of environment variables based on characteristics of the request
apache2_modules_speling - Attempts to correct mistaken URLs that users might have entered by ignoring capitalization and by allowing up to one misspelling
apache2_modules_status - Provides information on server activity and performance
apache2_modules_substitute - Perform search and replace operations on response bodies
apache2_modules_unique_id - Provides an environment variable with a unique identifier for each request
apache2_modules_userdir - User-specific directories
apache2_modules_usertrack - Clickstream logging of user activity on a site
apache2_modules_version - Version dependent configuration
apache2_modules_vhost_alias - Provides for dynamically configured mass virtual hosting
apache2_mpms_event - An experimental variant of the standard worker MPM
apache2_mpms_itk - Allows to run each virtual host under a separate uid and gid
apache2_mpms_peruser - Peruser is a working implementation of the perchild MPM allowing to run each apache child process as its own user and group, each handling its own set of virtual hosts
apache2_mpms_prefork - Implements a non-threaded, pre-forking web server
apache2_mpms_worker - Multi-Processing Module implementing a hybrid multi-threaded multi-process web server
apm - Adds 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 - Adds support for libaudiofile where applicable
avahi - Add avahi/Zeroconf support
bash-completion - Enable bash-completion support
bcmath - Adds support for libbcmath
berkdb - Adds support for sys-libs/db (Berkeley DB for MySQL)
bidi - Enables bidirectional language support
bindist - Flag to enable or disable options for prebuilt (GRP) packages (eg. due to licensing issues)
blas - Adds support for the virtual/blas numerical library
bluetooth - Enables Bluetooth Support
bootstrap - !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during original system bootstrapping [make stage2]
boundschecking - Adds 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
calculate_nocompiz - exclude compiz packages
calculate_nodecoration - exclude decoration packages
calculate_nodhcp - exclude dhcp packages
calculate_nodict - exclude dictionary packages
calculate_noftp - exclude ftp packages
calculate_nognome - exclude gnome packages
calculate_nographics - exclude graphics packages
calculate_nojabber - exclude jabber packages
calculate_nokde - exclude kde packages
calculate_nokernel - exclude calculate-source package
calculate_nomail - exclude mail packages
calculate_nomultimedia - exclude multimedia packages
calculate_nonamed - exclude named packages
calculate_nonettools - exclude nettools packages
calculate_nonetwork - exclude network packages
calculate_nooffice - exclude office packages
calculate_noopenbox - exclude openbox packages
calculate_nopgsql - exclude postgresql packages
calculate_noprinter - exclude printer packages
calculate_noproxy - exclude squid packages
calculate_nosamba - exclude samba packages
calculate_nowireless - exclude wireless packages
calculate_noxfce - exclude xfce packages
calculate_noxorg - exclude xorg-server packages
calendar - Adds support for calendars (not using mcal!)
calligra_features_braindump - CALLIGRA_FEATURES option to build mindmap note collection application
calligra_features_flow - CALLIGRA_FEATURES option to build flowcharting application
calligra_features_karbon - CALLIGRA_FEATURES option to build vector image editor
calligra_features_kexi - CALLIGRA_FEATURES option to build database manager
calligra_features_krita - CALLIGRA_FEATURES option to build raster image editor
calligra_features_plan - CALLIGRA_FEATURES option to build project planning component
calligra_features_stage - CALLIGRA_FEATURES option to build presentation processor
calligra_features_tables - CALLIGRA_FEATURES option to build table processor
calligra_features_words - CALLIGRA_FEATURES option to build word processor
cameras_adc65 - libgphoto support for adc65 cameras
cameras_agfa_cl20 - libgphoto support for agfa_cl20 cameras
cameras_aox - libgphoto support for aox cameras
cameras_ax203 - libgphoto support for ax203 cameras
cameras_barbie - libgphoto support for barbie cameras
cameras_canon - libgphoto support for canon cameras
cameras_casio_qv - libgphoto support for casio_qv cameras
cameras_clicksmart310 - libgphoto support for clicksmart310 cameras
cameras_digigr8 - libgphoto support for digigr8 cameras
cameras_digita - libgphoto support for digita cameras
cameras_dimagev - libgphoto support for dimagev cameras
cameras_dimera3500 - libgphoto support for dimera3500 cameras
cameras_directory - libgphoto support for directory cameras
cameras_enigma13 - libgphoto support for enigma13 cameras
cameras_fuji - libgphoto support for fuji cameras
cameras_gsmart300 - libgphoto support for gsmart300 cameras
cameras_hp215 - libgphoto support for hp215 cameras
cameras_iclick - libgphoto support for iclick cameras
cameras_jamcam - libgphoto support for jamcam cameras
cameras_jd11 - libgphoto support for jd11 cameras
cameras_jl2005a - libgphoto support for "American Idol Keychain Camera"
cameras_jl2005c - libgphoto support for "American Idol Keychain Camera"
cameras_kodak_dc120 - libgphoto support for kodak_dc120 cameras
cameras_kodak_dc210 - libgphoto support for kodak_dc210 cameras
cameras_kodak_dc240 - libgphoto support for kodak_dc240 cameras
cameras_kodak_dc3200 - libgphoto support for kodak_dc3200 cameras
cameras_kodak_ez200 - libgphoto support for kodak_ez200 cameras
cameras_konica - libgphoto support for konica cameras
cameras_konica_qm150 - libgphoto support for konica_qm150 cameras
cameras_largan - libgphoto support for largan cameras
cameras_lg_gsm - libgphoto support for lg_gsm cameras
cameras_mars - libgphoto support for mars cameras
cameras_mustek - libgphoto support for mustek cameras
cameras_panasonic_coolshot - libgphoto support for panasonic_coolshot cameras
cameras_panasonic_dc1000 - libgphoto support for panasonic_dc1000 cameras
cameras_panasonic_dc1580 - libgphoto support for panasonic_dc1580 cameras
cameras_panasonic_l859 - libgphoto support for panasonic_l859 cameras
cameras_pccam300 - libgphoto support for pccam300 cameras
cameras_pccam600 - libgphoto support for pccam600 cameras
cameras_polaroid_pdc320 - libgphoto support for polaroid_pdc320 cameras
cameras_polaroid_pdc640 - libgphoto support for polaroid_pdc640 cameras
cameras_polaroid_pdc700 - libgphoto support for polaroid_pdc700 cameras
cameras_ptp2 - libgphoto support for ptp2 cameras
cameras_ricoh - libgphoto support for ricoh cameras
cameras_ricoh_g3 - libgphoto support for ricoh_g3 cameras
cameras_samsung - libgphoto support for samsung cameras
cameras_sierra - libgphoto support for sierra cameras
cameras_sipix_blink - libgphoto support for sipix_blink cameras (obsolete)
cameras_sipix_blink2 - libgphoto support for sipix_blink2 cameras
cameras_sipix_web2 - libgphoto support for sipix_web2 cameras
cameras_smal - libgphoto support for smal cameras
cameras_sonix - libgphoto support for sonix cameras
cameras_sony_dscf1 - libgphoto support for sony_dscf1 cameras
cameras_sony_dscf55 - libgphoto support for sony_dscf55 cameras
cameras_soundvision - libgphoto support for soundvision cameras
cameras_spca50x - libgphoto support for spca50x cameras
cameras_sq905 - libgphoto support for sq905 cameras
cameras_st2205 - libgphoto support for st2205 cameras
cameras_stv0674 - libgphoto support for stv0674 cameras
cameras_stv0680 - libgphoto support for stv0680 cameras
cameras_sx330z - libgphoto support for sx330z cameras
cameras_template - libgphoto support for template cameras (obsolete)
cameras_topfield - libgphoto support for Topfield PVR5000 cameras
cameras_toshiba_pdrm11 - libgphoto support for toshiba_pdrm11 cameras
cameras_tp6801 - libgphoto support for Tenx tp6801 cameras
canna - Adds support for the Canna kana to kanji conversion engine
caps - Use Linux capabilities library to control privilege
cdb - Adds support for the CDB database engine from the author of qmail
cdda - Adds Compact Disk Digital Audio (Standard Audio CD) support
cddb - Access cddb servers to retrieve and submit information about compact disks
cdinstall - Copies files from the CD rather than asking the user to copy them, mostly used with games
cdistro_CDS - include Calculate Directory Server packages
cdistro_CLD - include Calculate Linux Desktop KDE packages
cdistro_CLDG - include Calculate Linux Desktop GNOME packages
cdistro_CLDX - include Calculate Linux Desktop XFCE packages
cdistro_CLS - include Calculate Linux Scratch packages
cdistro_CMC - include Calculate Media Center packages
cdistro_CSS - include Calculate Scratch Server packages
cdistro_desktop - include desktop packages
cdparanoia - Enables cdparanoia (audio CD ripper) support
cdr - Adds support for CD writer hardware
cgi - Add CGI script support
cjk - Adds support for Multi-byte character languages (Chinese, Japanese, Korean)
clamav - Adds support for Clam AntiVirus software (usually with a plugin)
coreaudio - Build the CoreAudio driver on Mac OS X systems
cracklib - Support for cracklib strong password checking
crosscompile_opts_bootstrap - Build only a bootstrap version of the toolchain.
crosscompile_opts_headers-only - Build the toolchain against cross-headers only.
crypt - Add support for encryption -- using mcrypt or gpg where applicable
cscope - Enables cscope interface -- in vim for example
css - Enables reading of encrypted DVDs
ctype - Enables ctype functions
cups - Add support for CUPS (Common Unix Printing System)
curl - Adds support for client-side URL transfer library
curlwrappers - Adds support for using curl in streams
custom-cflags - Build with user-specified CFLAGS (unsupported)
cvs - Enable CVS (Concurrent Versions System) integration
cxx - Builds support for C++ (bindings, extra libraries, code generation, ...)
dbi - Enable dev-db/libdbi (database-independent abstraction layer) support
dbm - Adds support for generic DBM databases
dbus - Enable dbus support for anything that needs it (gpsd, gnomemeeting, etc)
dbx - Adds database abstraction layer
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 - Adds support for dedicated game servers (some packages do not provide clients and servers at the same time)
dga - Adds DGA (Direct Graphic Access) support for X
directfb - Adds support for DirectFB layer (library for FB devices)
djvu - support DjVu, a PDF-like document format esp. suited for scanned documents
doc - Adds extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
dracut_modules_biosdevname - Name devices with names returned by BIOS
dracut_modules_btrfs - Scan for Btrfs on block devices
dracut_modules_caps - Load kernel modules and drop this privilege for real init
dracut_modules_crypt - Decrypt devices encrypted with cryptsetup/LUKS
dracut_modules_crypt-gpg - Support for GPG-encrypted keys for crypt module
dracut_modules_dmraid - Support dmraid devices, also known as ATA-RAID, or Fake RAID
dracut_modules_dmsquash-live - Module which might be used for Live CDs
dracut_modules_gensplash - Framebuffer splash (media-gfx/splashutils)
dracut_modules_iscsi - Support iSCSI
dracut_modules_livenet - Similar to dmsquash-live but gets image via HTTP(S)
dracut_modules_lvm - Support Logical Volume Manager
dracut_modules_mdraid - Support MD devices, also known as software RAID devices
dracut_modules_multipath - Support Device Mapper multipathing
dracut_modules_nbd - Support network block devices
dracut_modules_nfs - Support NFS
dracut_modules_plymouth - Plymouth boot splash
dracut_modules_syslog - Enable logging with syslog-ng or rsyslog
dracut_modules_xen - Support for Xen
dri - Enable direct rendering: used for accelerated 3D and some 2D, like DMA
dts - Enables DTS Coherent Acoustics decoder support
dv - Enables support for a codec used by many camcorders
dvb - Adds support for DVB (Digital Video Broadcasting)
dvb_cards_af9005 - DVB_CARDS setting to add support for the afatech af9005 USB1.1 DVB-T Demodulator (Various NoName devices, Terratec Xinergy XE rev.1)
dvb_cards_bcm3510 - DVB_CARDS setting to add support for the Broadcom BCM3510 ATSC demodulator (Air2PC)
dvb_cards_cx18 - DVB_CARDS setting to add support for the Conexant cx23418 chip (Hauppauge HVR1600)
dvb_cards_cx231xx - DVB_CARDS setting to add support for Conexant cx231xx USB Devices
dvb_cards_cx23885 - DVB_CARDS setting to add support for the Conexant cx23885 chip (DViCO FusionHDTV5 Express, Hauppauge WinTV HVR1250 HVR1500 HVR1800 HVR1800lp)
dvb_cards_dibusb-usb1 - DVB_CARDS setting to add support for the dibcom design USB1.1 DVB-T-device (Twinhan, KWorld, Hama, Artec, Compro)
dvb_cards_dibusb-usb2 - DVB_CARDS setting to add support for the dibcom design USB2 DVB-T-device (Grand, LiteOn, YUAN, Typhoon)
dvb_cards_mpc718 - DVB_CARDS setting to add support for the MT352 DVB-T demodulator initialization sequence for Yuan MPC718 cards for use by the cx18 driver.
dvb_cards_nxt200x - DVB_CARDS setting to add support for the nxt200x ATSC Demodulator (Air2PC, Kworld, Aver, ATI)
dvb_cards_opera1 - DVB_CARDS setting to add support for the opera1 USB DVB-S-device (Opera DVB-S1 USB-Box)
dvb_cards_or51132 - DVB_CARDS setting to add support for the or51132 Demodulator (pcHDTV)
dvb_cards_or51211 - DVB_CARDS setting to add support for the or51211 DVB-T Demodulator (Yakumo QuickStick)
dvb_cards_pvrusb2 - DVB_CARDS setting to add support for Conexant cx2584x chips (PVR150, PVR500, Yuan PG600/Diamond PVR-550)
dvb_cards_sp8870 - DVB_CARDS setting to add support for the sp8870 chip (T Nexus-T premium rev1.2)
dvb_cards_sp887x - DVB_CARDS setting to add support for the sp887x chip (Avermedia DVB-T 761)
dvb_cards_tda10045 - DVB_CARDS setting to add support for the tda10045 DVB-T Demodulator (Hauppauge/TT Nova-T, TT Nova-USB-T)
dvb_cards_tda10046 - DVB_CARDS setting to add support for the tda10046 DVB-T Demodulator (Hauppauge/TT Nova-T, TT Nova-USB-T)
dvb_cards_tda10046lifeview - DVB_CARDS setting to add support for the tda10046 DVB-T Demodulator (Lifeview cards)
dvb_cards_ttpci - DVB_CARDS setting to add support for the Full-Featured Cards built by TechnoTrend, Siemens, Hauppauge
dvb_cards_ttusb-dec - DVB_CARDS setting to add support for the ttusb-dec chip (WinTV NOVA-T USB2)
dvb_cards_usb-a800 - DVB_CARDS setting to add support for the usb-a800 USB DVB-T-device (AVerMedia AVerTV)
dvb_cards_usb-af9015 - DVB_CARDS setting to add support for the usb-af9015 USB DVB-T-device (Avermedia)
dvb_cards_usb-bluebird - DVB_CARDS setting to add support for the bluebird usb-device (DViCO bluebird)
dvb_cards_usb-dib0700 - DVB_CARDS setting to add support for the usb-dib0700 USB DVB-T-device (Hauppauge Nova-T Stick)
dvb_cards_usb-dtt200u - DVB_CARDS setting to add support for the usb-dtt200u USB DVB-T-devices (Yakumo, Yuan, Hama, TYPHOON, WideView, V-Gear)
dvb_cards_usb-dw2104 - DVB_CARDS setting to add support for the usb-dw2104 USB DVB-S2-device (TeVii S650 DVB-S2 USB)
dvb_cards_usb-umt - DVB_CARDS setting to add support for the usb-umt USB2.0-DVB-T-device (Hanftek)
dvb_cards_usb-vp702x - DVB_CARDS setting to add support for the usb-vp702x USB DVB-S-devices (TwinhanDTV, DigitalRise, TYPHOON)
dvb_cards_usb-vp7045 - DVB_CARDS setting to add support for the usb-vp7045 USB DVB-T-devices (TwinhanDTV, DigitalNow, DigitalRise, dnt)
dvb_cards_usb-wt220u - DVB_CARDS setting to add support for the usb-wt220u USB DVB-T-devices (Yakumo, Yuan, TYPHOON, WideView, Freecom, V-Gear, dnt, Redbell)
dvb_cards_vp7041 - DVB_CARDS setting to add support for the vp7041 USB DVB-T-devices (TwinhanDTV)
dvd - Adds support for DVDs
dvdr - Adds support for DVD writer hardware (e.g. in xcdroast)
eds - Enables support for Evolution-Data-Server (EDS)
elibc_AIX - ELIBC setting for systems that use the AIX C library
elibc_Darwin - ELIBC setting for systems that use the Darwin C library
elibc_DragonFly - ELIBC setting for systems that use the DragonFly C library
elibc_FreeBSD - ELIBC setting for systems that use the FreeBSD C library
elibc_glibc - ELIBC setting for systems that use the GNU C library
elibc_HPUX - ELIBC setting for systems that use the HP-UX C library
elibc_Interix - ELIBC setting for systems that use the Interix C library
elibc_mintlib - ELIBC setting for systems that use the FreeMiNT C library
elibc_NetBSD - ELIBC setting for systems that use the NetBSD C library
elibc_OpenBSD - ELIBC setting for systems that use the OpenBSD C library
elibc_SunOS - ELIBC setting for systems that use the Sun Solaris C library
elibc_uclibc - ELIBC setting for systems that use the uClibc C library
emacs - Adds support for GNU Emacs
emboss - Adds support for the European Molecular Biology Open Software Suite
encode - Adds support for encoding of audio or video files
enscript - Add enscript support to colourize code stored in the repository
esd - Adds support for media-sound/esound (Enlightened Sound Daemon)
evo - Adds support for mail-client/evolution
examples - Install examples, usually source code
exif - Adds 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 - Adds framebuffer support for the console, via the kernel
ffmpeg - Enable ffmpeg-based audio/video codec support
fftw - Use FFTW library for computing Fourier transforms
firebird - Adds support for the Firebird relational database
firefox - Build against Firefox instead of Seamonkey/Mozilla
flac - Adds support for FLAC: Free Lossless Audio Codec
flatfile - Adds dbm support for flat files
fltk - Adds support for the Fast Light Toolkit gui interface
fontconfig - Support for configuring and customizing font access via media-libs/fontconfig
foo2zjs_devices_hp1000 - Get HP LJ 1000 firmware file -
foo2zjs_devices_hp1005 - Get HP LJ 1005 firmware file -
foo2zjs_devices_hp1018 - Get HP LJ 1005 firmware file -
foo2zjs_devices_hp1020 - Get HP LJ 1020 firmware file -
foo2zjs_devices_hp1215 - Get HP LJ 1215 firmware file
foo2zjs_devices_hp1500 - Get HP Color LaserJet 1500 .ICM files -
foo2zjs_devices_hp1600 - Get HP Color LaserJet 1600 .ICM files -
foo2zjs_devices_hp2600n - Get HP Color LaserJet 2600n .ICM files -
foo2zjs_devices_hpp1005 - Get HP LJ P1005 firmware file -
foo2zjs_devices_hpp1006 - Get HP LJ P1006 firmware file -
foo2zjs_devices_hpp1007 - Get HP LJ P1007 firmware file
foo2zjs_devices_hpp1008 - Get HP LJ P1008 firmware file
foo2zjs_devices_hpp1505 - Get HP LJ P1505 firmware file -
foo2zjs_devices_km2200 - Get Minolta 2200 DL .ICM files -
foo2zjs_devices_km2300 - Get Minolta 2300 DL .ICM files -
foo2zjs_devices_km2430 - Get Konica Minolta 2430 DL .ICM files -
foo2zjs_devices_km2480 - Get Konica Minolta 2480 MF .ICM files -
foo2zjs_devices_km2490 - Get Konica Minolta 2490 MF .ICM files -
foo2zjs_devices_km2530 - Get Konica Minolta 2530 DL .ICM files -
foo2zjs_devices_kmcpwl - Get Minolta Color PageWorks/Pro L .ICM files -
foo2zjs_devices_lm500 - Get Lexmark C500 .ICM files -
foo2zjs_devices_oki3200 - Get Oki C3200 .ICM files -
foo2zjs_devices_oki3300 - Get Oki C3300 .ICM files -
foo2zjs_devices_oki3400 - Get Oki C3400 .ICM files -
foo2zjs_devices_oki3530 - Get Oki C3530 .ICM files
foo2zjs_devices_oki5100 - Get Oki C5100 .ICM files -
foo2zjs_devices_oki5200 - Get Oki C5200 .ICM files -
foo2zjs_devices_oki5500 - Get Oki C5500 .ICM files -
foo2zjs_devices_oki5600 - Get Oki C5600 .ICM files -
foo2zjs_devices_oki5800 - Get Oki C5800 .ICM files -
foo2zjs_devices_sa2160 - Get Samsung CLX-2160 .ICM files -
foo2zjs_devices_sa300 - Get Samsung CLP-300 .ICM files -
foo2zjs_devices_sa315 - Get Samsung CLP-315 .ICM files
foo2zjs_devices_sa3160 - Get Samsung CLX-3160 .ICM files -
foo2zjs_devices_xp6110 - Get Xerox Phaser 6110 and 6110MFP .ICM files -
foo2zjs_devices_xp6115 - Get Xerox Phaser 6115MFP .ICM files -
foomaticdb - Adds support for the foomatic printing driver database
fortran - Adds support for fortran (formerly f77)
freetds - Adds support for the TDS protocol to connect to MSSQL/Sybase databases
freewnn - Adds support for FreeWnn kana to kanji conversion engine
frontbase - Adds support for the frontbase sql server
ftp - Adds FTP (File Transfer Protocol) support
gcj - Enable building with gcj (The GNU Compiler for the Javatm Programming Language)
gd - Adds support for media-libs/gd (to generate graphics on the fly)
gdbm - Adds support for sys-libs/gdbm (GNU database libraries)
geoip - Add geoip support for country and city lookup based on IPs
ggi - Adds support for media-libs/libggi (non-X video api/drivers)
gif - Adds GIF image support
gimp - Build a plugin for the GIMP
glut - Build an OpenGL plugin using the GLUT library
gmp - Adds support for dev-libs/gmp (GNU MP library)
gnome - Adds GNOME support
gnome-keyring - Enable support for storing passwords via gnome-keyring
gnuplot - Enable support for gnuplot (data and function plotting)
gnutls - Adds support for net-libs/gnutls (TLS 1.0 and SSL 3.0 support)
gphoto2 - Adds digital camera support
gpm - Adds support for sys-libs/gpm (Console-based mouse driver)
gps - Adds support for Global Positioning System
gpsd_protocols_aivdm - AIVDM protocol support
gpsd_protocols_ashtech - Ashtech protocol support
gpsd_protocols_clientdebug - Client debugging protocol support
gpsd_protocols_earthmate - Earthmate protocol support
gpsd_protocols_evermore - EverMore protocol support
gpsd_protocols_fv18 - FV-18 protocol support
gpsd_protocols_garmin - Garmin protocol support
gpsd_protocols_garmintxt - Garmin Simple Text protocol support
gpsd_protocols_gpsclock - GPSclock protocol support
gpsd_protocols_itrax - iTrax protocol support
gpsd_protocols_mtk3301 - MTK-3301 protocol support
gpsd_protocols_navcom - Navcom protocol support
gpsd_protocols_nmea - NMEA protocol support
gpsd_protocols_ntrip - NTRIP protocol support
gpsd_protocols_oceanserver - OceanServer protocol support
gpsd_protocols_oldstyle - Oldstyle (pre-JSON) protocol support
gpsd_protocols_oncore - OnCore protocol support
gpsd_protocols_rtcm104v2 - RTCM104V2 protocol support
gpsd_protocols_rtcm104v3 - RTCM104V3 protocol support
gpsd_protocols_sirf - SiRF protocol support
gpsd_protocols_superstar2 - SuperStarII protocol support
gpsd_protocols_timing - Timing protocol support
gpsd_protocols_tnt - True North protocol support
gpsd_protocols_tripmate - Tripmate protocol support
gpsd_protocols_tsip - Trimble TSIP protocol support
gpsd_protocols_ubx - UBX protocol support
graphviz - Adds support for the Graphviz library
grub_platforms_coreboot - Coreboot platform support
grub_platforms_efi-32 - EFI 32 bit platform support (Old MACs)
grub_platforms_efi-64 - EFI 64 bit platform support
grub_platforms_emu - Emulation platform support
grub_platforms_ieee1275 - IEEE1275 pltaform support
grub_platforms_loongson - MIPS loongson platform support
grub_platforms_multiboot - Multiboot platform support
grub_platforms_pc - PC platform suppport
grub_platforms_qemu - QEMU platform support
grub_platforms_qemu-mips - QEMU MIPS platform support
grub_platforms_yeeloong - YEEELONG MIPS platform support
gsl - Use the GNU scientific library for calculations
gsm - Adds support for the gsm lossy speech compression codec
gstreamer - Adds support for media-libs/gstreamer (Streaming media)
gtk - Adds support for x11-libs/gtk+ (The GIMP Toolkit)
gtkhtml - Adds support for gnome-extra/gtkhtml
guile - Adds support for the guile Scheme interpreter
gzip - Compress files with Lempel-Ziv coding (LZ77)
hal - Enable Hardware Abstraction Layer (HAL) support (WARNING: Try to avoid this. Deprecated method of accessing hardware.)
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 - Adds support for the Hierarchical Data Format v5
hscolour - Includes 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 - Enables support for Imagemagick (image converter)
imap - Adds support for IMAP (Internet Mail Application Protocol)
imlib - Adds support for imlib, an image loading and rendering library
infiniband - Enable Infiniband RDMA transport support
inifile - Adds dbm support for .ini files
input_devices_acecad - INPUT_DEVICES setting to build driver for acecad input devices
input_devices_aiptek - INPUT_DEVICES setting to build driver for aiptek input devices
input_devices_calcomp - INPUT_DEVICES setting to build driver for calcomp input devices
input_devices_citron - INPUT_DEVICES setting to build driver for citron input devices
input_devices_digitaledge - INPUT_DEVICES setting to build driver for digitaledge input devices
input_devices_dmc - INPUT_DEVICES setting to build driver for dmc input devices
input_devices_dynapro - INPUT_DEVICES setting to build driver for dynapro input devices
input_devices_elo2300 - INPUT_DEVICES setting to build driver for elo2300 input devices
input_devices_elographics - INPUT_DEVICES setting to build driver for elographics input devices
input_devices_evdev - INPUT_DEVICES setting to build driver for evdev input devices
input_devices_fpit - INPUT_DEVICES setting to build driver for fpit input devices
input_devices_hyperpen - INPUT_DEVICES setting to build driver for hyperpen input devices
input_devices_jamstudio - INPUT_DEVICES setting to build driver for jamstudio input devices
input_devices_joystick - INPUT_DEVICES setting to build driver for joystick input devices
input_devices_keyboard - INPUT_DEVICES setting to build driver for keyboard input devices
input_devices_lirc - INPUT_DEVICES setting to build driver for LIRC input devices (i.e. infra-red remote control)
input_devices_magellan - INPUT_DEVICES setting to build driver for magellan input devices
input_devices_magictouch - INPUT_DEVICES setting to build driver for magictouch input devices
input_devices_microtouch - INPUT_DEVICES setting to build driver for microtouch input devices
input_devices_mouse - INPUT_DEVICES setting to build driver for mouse input devices
input_devices_mutouch - INPUT_DEVICES setting to build driver for mutouch input devices
input_devices_none - INPUT_DEVICES setting to build no drivers (useful when using binary drivers)
input_devices_palmax - INPUT_DEVICES setting to build driver for palmax input devices
input_devices_penmount - INPUT_DEVICES setting to build driver for penmount input devices
input_devices_spaceorb - INPUT_DEVICES setting to build driver for spaceorb input devices
input_devices_summa - INPUT_DEVICES setting to build driver for summa input devices
input_devices_synaptics - INPUT_DEVICES setting to build driver for synaptics input devices
input_devices_tek4957 - INPUT_DEVICES setting to build driver for tek4957 input devices
input_devices_tslib - INPUT_DEVICES setting to build driver for tslib input devices
input_devices_ur98 - INPUT_DEVICES setting to build driver for ur98 input devices
input_devices_virtualbox - INPUT_DEVICES setting to build driver for virtualbox input emulation
input_devices_vmmouse - INPUT_DEVICES setting to build driver for vmmouse input devices
input_devices_void - INPUT_DEVICES setting to build driver for void/dummy input devices
input_devices_wacom - INPUT_DEVICES setting to build driver for wacom input devices
iodbc - Adds 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 - Adds support for IP version 6
iwmmxt - Adds support for optimizations for ARM iwMMXt instructions
jabber - Enable jabber IM protocol support
jack - Adds support for the JACK Audio Connection Kit
java - Adds support for Java
java6 - Use Java 1.6 to build package with || ( reduced deps, 1.6 features, source/target 1.6 )
javascript - Enables javascript support
jbig - enables jbig-kit support for tiff, Hylafax, ImageMagick, etc
jingle - Enables voice calls for jabber
joystick - Add support for joysticks in all packages
jpeg - Adds JPEG image support
jpeg2k - Support for JPEG 2000, a wavelet-based image compression format
kde - Adds support for kde-base/kde (K Desktop Enviroment)
kdeenablefinal - EXPERIMENTAL: KDE ebuilds will use the enable-final flag, yielding compilation speedups at the cost of heavy mem usage and potentially causing problems. We strongly discourage setting this
kdeprefix - Makes a KDE prefixed install into /usr/kde/${SLOT} if enabled or into /usr (FHS compatible) otherwise
kerberos - Adds kerberos support
kernel_AIX - KERNEL setting for system using the AIX kernel
kernel_Darwin - KERNEL setting for system using the Darwin kernel (i.e.: Mac OS X).
kernel_FreeBSD - KERNEL setting for system using the FreeBSD kernel
kernel_freemint - KERNEL setting for system using the FreeMiNT kernel
kernel_HPUX - KERNEL setting for system using the HP-UX kernel
kernel_Interix - KERNEL setting for system using the Interix subsystem (SFU on Windows)
kernel_linux - KERNEL setting for system using the Linux kernel
kernel_NetBSD - KERNEL setting for system using the NetBSD kernel
kernel_OpenBSD - KERNEL setting for system using the OpenBSD kernel
kernel_SunOS - KERNEL setting for system using an SunOS (i.e.: Solaris) kernel
kolab - Adds support for the Kolab groupware server
kontact - Enable support for the KDE personal information manager (kde-base/kdepim*)
ladspa - Enables the ability to support ladspa plugins
lame - Prefer using LAME libraries for MP3 encoding support
lapack - Adds support for the virtual/lapack numerical library
lash - Adds LASH Audio Session Handler support
latex - Adds support for LaTeX (typesetting package)
lcd_devices_bayrad - Add support for BayRAD LCD modules by EMAC
lcd_devices_beckmannegle - Add support for Beckmann+Egle "Mini Terminals" and "Compact Terminals"
lcd_devices_bwct - Add support for BWCT USB LCD displays
lcd_devices_cfontz - Add support for CrystalFontz displays
lcd_devices_cfontz633 - Add support for CrystalFontz 633 chipset displays
lcd_devices_cfontzpacket - Add support for CrystalFontz chipsets CFA-631, CFA-633 and CFA-635
lcd_devices_cwlinux - Add support for serial / USB displays CW12232 and CW1602 by CwLinux
lcd_devices_ea232 - Add support for the Electronic Assembly RS232 graphic driver
lcd_devices_ea65 - Add support for the VFD in the AOpen XC Cube-AV EA65 media barebone
lcd_devices_eyeboxone - Add support for the displays on Rightvision's EyeboxOne server
lcd_devices_g15 - Add support for Logitech G15 Keyboard LCDs
lcd_devices_glk - Add support for MatrixOrbital GLK chipset
lcd_devices_graphlcd - Meta-driver to support drivers via app-misc/graphlcd-base
lcd_devices_hd44780 - Add support for Hitachi HD44780 and compatible displays
lcd_devices_hd44780i2c - Enable hd44780 via i2c instead of parallel port driver
lcd_devices_i2500vfd - Add support for the Intra2net Intranator 2500 VFD display
lcd_devices_icpa106 - Add support for ICP A106 alarm/LCD boards for 19" racks
lcd_devices_imon - Add support for Soundgraph/Ahanix/Silverstone/Uneed/Accent iMON IR/VFD modules (Antec Fusion)
lcd_devices_imonlcd - Add support for Soundgraph iMON LCD modules (Antec Fusion)
lcd_devices_iowarrior - Add support for IO-Warrior displays
lcd_devices_irtrans - Add support for the 16x2 IRTrans VFD device
lcd_devices_lb216 - Add support for RTN's LB216 display
lcd_devices_lcd2usb - Add support for the open lcd2usb connector to hd44780 displays
lcd_devices_lcdlinux - Add support for HD44780 displays via the LCD-Linux kernel driver
lcd_devices_lcdm001 - Add support for the Kernelconcepts LCDM001 display
lcd_devices_lcdterm - Add support for LCDTerm serial-to-HD44780 adapter boards
lcd_devices_lcterm - Add support for Neumark's LCTerm serial LCD
lcd_devices_ledmatrix - Add support for SLM1606/8 LED Matrix displays
lcd_devices_lis - Add support for the VLSystem L.I.S MCE 2005 VFD
lcd_devices_lph7508 - Add support for the Pollin LPH7508
lcd_devices_luise - Add support for the Wallbraun Electronics LCD-USB-Interface to Hitachi SP14Q002
lcd_devices_m50530 - Add support for M50530 and compatible displays
lcd_devices_md8800 - Add support for the VFD of the Medion MD8800 PC
lcd_devices_milfordbpk - Add support for Milford Instruments BPK serial interface board for HD44780
lcd_devices_ms6931 - Add support for MSI-6931 displays in MSI rack servers
lcd_devices_mtcs16209x - Add support for MTC_S16209x displays
lcd_devices_mtxorb - Add support for Matrix Orbital LCD* LKD* VFD* and VKD* displays
lcd_devices_ncurses - Add support for emulated LCD display on terminal using ncurses
lcd_devices_noritake - Add support for the Noritake GU128x32-311 graphical display.
lcd_devices_noritakevfd - Add support for the Noritake VFD Device CU20045SCPB-T28A
lcd_devices_null - Add support for a NULL driver (for testing)
lcd_devices_picolcd - Add support for Mini-Box's picoLCD
lcd_devices_png - Add support for PNG output
lcd_devices_ppm - Add support for PNG output
lcd_devices_pyramid - Add support for the Pyramid LCD device
lcd_devices_routerboard - Add support for the Router Board LCD port
lcd_devices_sed1330 - Add support for Seiko Epson SED1330/1335 graphical displays (S1D13300/S1D13305)
lcd_devices_sed1520 - Add support for the Seiko Epson SED1520 Controller
lcd_devices_serdisplib - Meta-driver to support drivers via dev-libs/serdisplib
lcd_devices_serialpos - Add support for character displays in serial point of sale ("POS") devices
lcd_devices_serialvfd - Add support for most NEC, Futaba and Noritake VFDs
lcd_devices_shuttlevfd - Add support for several Shuttle VFDs such as M1000, M2000, G5 3300m and SG33G5M
lcd_devices_simplelcd - Add support for a simple serial terminal display
lcd_devices_sli - Add support for a Wirz SLI display
lcd_devices_stv5730 - Add support for STV5730A on-screen display chips
lcd_devices_svga - Add support for output via media-libs/svgalib
lcd_devices_t6963 - Add support for Toshiba T6963 based LCD displays
lcd_devices_text - Add support for TextMode displaying
lcd_devices_trefon - Add support for Trefon USB LCD displays
lcd_devices_tyan - Add support for LCDs of the Barebone GS series
lcd_devices_ula200 - Add support for ULA200 USB devices that allow USB connection of HD44780s
lcd_devices_usbhub - Add support for USBHUB displays
lcd_devices_usblcd - Add support for USBLCD displays
lcd_devices_wincor - Add support for the WincorNixdorf serial cashier displays BA63 and BA66
lcd_devices_X - Add support for X11 displaying
lcd_devices_xosd - Add support for xosdlib
lcms - Adds lcms support (color management engine)
ldap - Adds LDAP support (Lightweight Directory Access Protocol)
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 - Adds libwww support (General purpose WEB API)
linguas_af - Afrikaans locale
linguas_ak - Akan locale
linguas_am - Amharic locale
linguas_ar - Arabic locale
linguas_as - Assamese locale
linguas_as_IN - Assamese locale for India
linguas_ast - Asturian locale
linguas_az - Azeri locale
linguas_be - Belarusian locale
linguas_be_BY - Belarusian locale
linguas_bg - Bulgarian locale
linguas_bn - Bengali locale
linguas_bn_BD - Bengalie locale for Bangladesh
linguas_bn_IN - Bengali locale for India
linguas_bo - Tibetan locale
linguas_br - Breton locale
linguas_brx - Bodo locale for India
linguas_bs - Bosnian locale
linguas_ca - Catalan locale
linguas_ca@valencia - Catalan locale (Valencia)
linguas_ca_XV - Asturian and Catalan locale (Valencia)
linguas_crh - Crimean Tatar (Crimean Turkish) locale
linguas_cs - Czech locale
linguas_csb - Kashubian locale
linguas_cy - Welsh locale
linguas_da - Danish locale
linguas_de - German locale
linguas_de_FR - German locale for France
linguas_dgo - Dogri locale for India
linguas_dz - Dzongkha locale
linguas_ee - Ewe locale
linguas_el - Greek locale
linguas_en - English locale
linguas_en_CA - English locale for Canada
linguas_en_GB - English locale for Britain
linguas_en_US - English locale
linguas_en_ZA - English locale for South Africa
linguas_eo - Esperanto locale
linguas_es - Spanish locale
linguas_es_AR - Spanish locale for Argentina
linguas_es_CL - Spanish locale for Chile
linguas_es_CR - Spanish locale for Costa Rica
linguas_es_ES - Spanish locale for Spain
linguas_es_LA - Spanish locale for Latin America
linguas_es_MX - Spanish locale for Mexico
linguas_et - Estonian locale
linguas_et_EE - Estonian locale
linguas_eu - Basque locale
linguas_fa - Persian locale
linguas_fi - Finnish locale
linguas_fil - Filipino locale
linguas_fo - Faroese locale
linguas_fr - French locale
linguas_fr_CA - French locale for Canada
linguas_fy - Frisian locale
linguas_fy_NL - Frisian language locale for the Netherlands
linguas_ga - Irish locale
linguas_ga_IE - Irish locale for Ireland
linguas_gd - Gaelic locale
linguas_gl - Galician locale
linguas_gu - Gujarati locale
linguas_gu_IN - Gujarati locale for India
linguas_he - Hebrew locale
linguas_hi - Hindi locale
linguas_hi_IN - Hindi locale
linguas_hne - Chhattisgarhi locale
linguas_hr - Croatian locale
linguas_hsb - Upper Sorbian locale
linguas_hu - Hungarian locale
linguas_hy - Armenian locale
linguas_hy_AM - Armenian locale
linguas_ia - Interlingua locale
linguas_id - Indonesian locale
linguas_is - Icelandic locale
linguas_it - Italian locale
linguas_ja - Japanese locale
linguas_ka - Georgian locale
linguas_kk - Kazakh locale
linguas_km - Khmer locale
linguas_kn - Kannada locale
linguas_kn_IN - Kannada locale for India
linguas_ko - Korean locale
linguas_kok - Konkani locale
linguas_ko_KR - Korean locale
linguas_ks - Kashmiri locale
linguas_ku - Kurdish (latin) locale
linguas_ky - Kyrgyz (Kirghiz) locale
linguas_la - Latin2 locale
linguas_lb - Luxembourgish locale
linguas_lg - Ganda locale
linguas_lo - Lao locale
linguas_lt - Lithuanian locale
linguas_lv - Latvian locale
linguas_mai - Maithili locale
linguas_me - Montenegrin (Crnogorski) locale
linguas_mk - Macedonian locale
linguas_ml - Malayalam locale
linguas_ml_IN - Malayalam locale for India
linguas_mn - Mongolian locale
linguas_mni - Manipuri locale
linguas_mr - Marathi locale
linguas_mr_IN - Marathi locale for India
linguas_ms - Malay locale
linguas_mt - Maltese locale
linguas_my - Burmese locale
linguas_nan - Min Nan locale
linguas_nb - Norwegian (Bokmal) locale
linguas_nb_NO - Norwegian (Bokmal) locale for Norway
linguas_nds - Low Saxon locale
linguas_ne - Nepali locale
linguas_nl - Dutch locale
linguas_nn - Nynorsk locale
linguas_nn_NO - Nynorsk locale for Norway
linguas_no - Norwegian locale
linguas_nr - Ndebele (South) locale
linguas_ns - Northern Sotho locale
linguas_nso - Northern Sotho locale
linguas_oc - Occitan locale
linguas_om - Oromo locale
linguas_or - Oriya locale
linguas_or_IN - Oriya locale for India
linguas_pa - Punjabi locale for India
linguas_pa_IN - Punjabi locale for India
linguas_pap - Paiamento local
linguas_pl - Polish locale
linguas_ps - Pushto locale
linguas_pt - Portuguese locale
linguas_pt_BR - Portuguese locale for Brasil
linguas_pt_PT - Portuguese locale for Portugal
linguas_rm - Romansh locale
linguas_ro - Romanian locale
linguas_ru - Russian locale
linguas_rw - Kinyarwanda locale
linguas_sa_IN - Sanskrit locale
linguas_sat - Santali locale
linguas_sd - Sindhi locale
linguas_se - Northern Saami locale
linguas_sh - Serbo-Croatian locale
linguas_sh_YU - Serbo-Croatian locale
linguas_si - Sinhala locale
linguas_sk - Slovak locale
linguas_sl - Slovenian locale
linguas_son - Songhai locale
linguas_sq - Albanian locale
linguas_sr - Serbian locale
linguas_sr_CS - Serbian locale
linguas_sr@ijekavian - Serbian-Ijekavian locale
linguas_sr@ijekavianlatin - Serbian-Ijekavian (latin) locale
linguas_sr@latin - Serbian (latin) locale
linguas_sr@Latn - Serbian (latin) locale
linguas_ss - Swati locale
linguas_st - Southern Sotho locale
linguas_sv - Swedish locale
linguas_sv_SE - Swedish locale for Sweden
linguas_sw - Swahili locale
linguas_sw_TZ - Swahili locale for Tanzania
linguas_ta - Tamil locale
linguas_ta_IN - Tamil locale
linguas_ta_LK - Tamil locale for Sri Lanka
linguas_te - Telugu locale
linguas_te_IN - Telugu locale for India
linguas_tg - Tajik locale
linguas_th - Thai locale
linguas_ti - Tigrinya locale
linguas_ti_ER - Tigrinya locale for Eritrea
linguas_tk - Turkmen locale
linguas_tl - Tagalog locale
linguas_tn - Tswana locale
linguas_tr - Turkish locale
linguas_ts - Tsonga locale
linguas_ug - Uighur locale
linguas_uk - Ukrainian locale
linguas_ur - Urdu locale
linguas_ur_IN - Urdu locale for India
linguas_ur_PK - Urdu language locale for Pakistan
linguas_uz - Uzbek locale
linguas_uz@cyrillic - Uzbek (cyrillic) locale
linguas_ve - Venda locale
linguas_vi - Vietnamese locale
linguas_wa - Walloon locale
linguas_xh - Xhosa locale
linguas_zh - Chinese locale
linguas_zh_CN - Chinese locale for Peoples Republic of China
linguas_zh_HK - Chinese locale for Hong Kong
linguas_zh_TW - Chinese locale for Taiwan
linguas_zu - Zulu locale
lirc - Adds support for lirc (Linux's Infra-Red Remote Control)
lirc_devices_accent - LIRC_DEVICES setting to add support for accent receiver device
lirc_devices_act200l - LIRC_DEVICES setting to add support for act200l receiver device
lirc_devices_act220l - LIRC_DEVICES setting to add support for act220l receiver device
lirc_devices_adaptec - LIRC_DEVICES setting to add support for adaptec receiver device
lirc_devices_all - LIRC_DEVICES setting to add support for all receiver devices
lirc_devices_alsa_usb - LIRC_DEVICES setting to add support for alsa_usb receiver device
lirc_devices_animax - LIRC_DEVICES setting to add support for animax receiver device
lirc_devices_asusdh - LIRC_DEVICES setting to add support for asusdh receiver device
lirc_devices_atilibusb - LIRC_DEVICES setting to add support for atilibusb receiver device
lirc_devices_atiusb - LIRC_DEVICES setting to add support for atiusb receiver device
lirc_devices_audio - LIRC_DEVICES setting to add support for audio receiver device
lirc_devices_audio_alsa - LIRC_DEVICES setting to add support for audio_alsa receiver device
lirc_devices_avermedia - LIRC_DEVICES setting to add support for avermedia receiver device
lirc_devices_avermedia98 - LIRC_DEVICES setting to add support for avermedia98 receiver device
lirc_devices_avermedia_vdomate - LIRC_DEVICES setting to add support for avermedia_vdomate receiver device
lirc_devices_awlibusb - LIRC_DEVICES setting to add support for awlibusb receiver device
lirc_devices_bestbuy - LIRC_DEVICES setting to add support for bestbuy receiver device
lirc_devices_bestbuy2 - LIRC_DEVICES setting to add support for bestbuy2 receiver device
lirc_devices_breakoutbox - LIRC_DEVICES setting to add support for breakoutbox receiver device
lirc_devices_bte - LIRC_DEVICES setting to add support for bte receiver device
lirc_devices_bw6130 - LIRC_DEVICES setting to add support for bw6130 receiver device
lirc_devices_caraca - LIRC_DEVICES setting to add support for caraca receiver device
lirc_devices_chronos - LIRC_DEVICES setting to add support for chronos receiver device
lirc_devices_cmdir - LIRC_DEVICES setting to add support for cmdir receiver device
lirc_devices_com1 - LIRC_DEVICES setting to add support for serial receiver device (defaults on using port #1)
lirc_devices_com2 - LIRC_DEVICES setting to add support for serial receiver device (defaults on using port #2)
lirc_devices_com3 - LIRC_DEVICES setting to add support for serial receiver device (defaults on using port #3)
lirc_devices_com4 - LIRC_DEVICES setting to add support for serial receiver device (defaults on using port #4)
lirc_devices_commandir - LIRC_DEVICES setting to add support for commandir receiver device
lirc_devices_cph06x - LIRC_DEVICES setting to add support for cph06x receiver device
lirc_devices_creative - LIRC_DEVICES setting to add support for creative receiver device
lirc_devices_creative_infracd - LIRC_DEVICES setting to add support for creative_infracd receiver device
lirc_devices_devinput - LIRC_DEVICES setting to add support for devinput receiver device
lirc_devices_digimatrix - LIRC_DEVICES setting to add support for digimatrix receiver device
lirc_devices_dsp - LIRC_DEVICES setting to add support for dsp receiver device
lirc_devices_dvico - LIRC_DEVICES setting to add support for dvico receiver device
lirc_devices_ea65 - LIRC_DEVICES setting to add support for ea65 receiver device
lirc_devices_ene0100 - LIRC_DEVICES setting to add support for ene0100 receiver device
lirc_devices_exaudio - LIRC_DEVICES setting to add support for exaudio receiver device
lirc_devices_flyvideo - LIRC_DEVICES setting to add support for flyvideo receiver device
lirc_devices_ftdi - LIRC_DEVICES setting to add support for ftdi receiver device
lirc_devices_gvbctv5pci - LIRC_DEVICES setting to add support for gvbctv5pci receiver device
lirc_devices_hauppauge - LIRC_DEVICES setting to add support for hauppauge receiver device
lirc_devices_hauppauge_dvb - LIRC_DEVICES setting to add support for hauppauge_dvb receiver device
lirc_devices_hercules_smarttv_stereo - LIRC_DEVICES setting to add support for hercules_smarttv_stereo receiver device
lirc_devices_i2cuser - LIRC_DEVICES setting to add support for i2cuser receiver device
lirc_devices_igorplugusb - LIRC_DEVICES setting to add support for igorplugusb receiver device
lirc_devices_iguanaIR - LIRC_DEVICES setting to add support for iguanaIR receiver device and software
lirc_devices_imon - LIRC_DEVICES setting to add support for imon receiver device
lirc_devices_imon_24g - LIRC_DEVICES setting to add support for imon_24g receiver device
lirc_devices_imon_knob - LIRC_DEVICES setting to add support for imon_knob device
lirc_devices_imon_lcd - LIRC_DEVICES setting to add support for imon_lcd receiver device
lirc_devices_imon_pad - LIRC_DEVICES setting to add support for imon_pad receiver device
lirc_devices_imon_pad2keys - LIRC_DEVICES setting to add support for imon_pad receiver device (converting pad events to keypresses)
lirc_devices_imon_rsc - LIRC_DEVICES setting to add support for imon_rsc receiver device
lirc_devices_inputlirc - LIRC_DEVICES setting to grab events from /dev/input/event* with inputlircd
lirc_devices_irdeo - LIRC_DEVICES setting to add support for irdeo receiver device
lirc_devices_irdeo_remote - LIRC_DEVICES setting to add support for irdeo_remote receiver device
lirc_devices_irlink - LIRC_DEVICES setting to add support for irlink receiver device
lirc_devices_irman - LIRC_DEVICES setting to add support for irman receiver device
lirc_devices_irreal - LIRC_DEVICES setting to add support for irreal receiver device
lirc_devices_it87 - LIRC_DEVICES setting to add support for it87 receiver device
lirc_devices_ite8709 - LIRC_DEVICES setting to add support for ite8709 receiver device
lirc_devices_knc_one - LIRC_DEVICES setting to add support for knc_one receiver device
lirc_devices_kworld - LIRC_DEVICES setting to add support for kworld receiver device
lirc_devices_leadtek_0007 - LIRC_DEVICES setting to add support for leadtek_0007 receiver device
lirc_devices_leadtek_0010 - LIRC_DEVICES setting to add support for leadtek_0010 receiver device
lirc_devices_leadtek_pvr2000 - LIRC_DEVICES setting to add support for leadtek_pvr2000 receiver device
lirc_devices_livedrive_midi - LIRC_DEVICES setting to add support for livedrive_midi receiver device
lirc_devices_livedrive_seq - LIRC_DEVICES setting to add support for livedrive_seq receiver device
lirc_devices_logitech - LIRC_DEVICES setting to add support for logitech receiver device
lirc_devices_lpt1 - LIRC_DEVICES setting to add support for parallel receiver device (defaults on using port #1)
lirc_devices_lpt2 - LIRC_DEVICES setting to add support for parallel receiver device (defaults on using port #2)
lirc_devices_macmini - LIRC_DEVICES setting to add support for macmini receiver device
lirc_devices_mceusb - LIRC_DEVICES setting to add support for mceusb receiver device
lirc_devices_mceusb2 - LIRC_DEVICES setting to add support for mceusb2 receiver device
lirc_devices_mediafocusI - LIRC_DEVICES setting to add support for mediafocusI receiver device
lirc_devices_mouseremote - LIRC_DEVICES setting to add support for mouseremote receiver device
lirc_devices_mouseremote_ps2 - LIRC_DEVICES setting to add support for mouseremote_ps2 receiver device
lirc_devices_mp3anywhere - LIRC_DEVICES setting to add support for mp3anywhere receiver device
lirc_devices_mplay - LIRC_DEVICES setting to add support for mplay receiver device
lirc_devices_nslu2 - LIRC_DEVICES setting to add support for nslu2 receiver device
lirc_devices_packard_bell - LIRC_DEVICES setting to add support for packard_bell receiver device
lirc_devices_parallel - LIRC_DEVICES setting to add support for parallel receiver device
lirc_devices_pcmak - LIRC_DEVICES setting to add support for pcmak receiver device
lirc_devices_pcmak_usb - LIRC_DEVICES setting to add support for pcmak_usb receiver device
lirc_devices_pctv - LIRC_DEVICES setting to add support for pctv receiver device
lirc_devices_pixelview_bt878 - LIRC_DEVICES setting to add support for pixelview_bt878 receiver device
lirc_devices_pixelview_pak - LIRC_DEVICES setting to add support for pixelview_pak receiver device
lirc_devices_pixelview_pro - LIRC_DEVICES setting to add support for pixelview_pro receiver device
lirc_devices_provideo - LIRC_DEVICES setting to add support for provideo receiver device
lirc_devices_realmagic - LIRC_DEVICES setting to add support for realmagic receiver device
lirc_devices_remotemaster - LIRC_DEVICES setting to add support for remotemaster receiver device
lirc_devices_remote_wonder_plus - LIRC_DEVICES setting to add support for Remote Wonder Plus (atiusb-based) receiver device
lirc_devices_sa1100 - LIRC_DEVICES setting to add support for sa1100 receiver device
lirc_devices_samsung - LIRC_DEVICES setting to add support for samsung receiver device
lirc_devices_sasem - LIRC_DEVICES setting to add support for sasem receiver device
lirc_devices_sb0540 - LIRC_DEVICES setting to add support for sb0540 receiver device
lirc_devices_serial - LIRC_DEVICES setting to add support for serial receiver device
lirc_devices_serial_igor_cesko - LIRC_DEVICES setting to add support for serial receiver device (with Igor Cesko design)
lirc_devices_silitek - LIRC_DEVICES setting to add support for silitek receiver device
lirc_devices_sir - LIRC_DEVICES setting to add support for sir receiver device
lirc_devices_slinke - LIRC_DEVICES setting to add support for slinke receiver device
lirc_devices_streamzap - LIRC_DEVICES setting to add support for streamzap receiver device
lirc_devices_tekram - LIRC_DEVICES setting to add support for tekram receiver device
lirc_devices_tekram_bt829 - LIRC_DEVICES setting to add support for tekram_bt829 receiver device
lirc_devices_tira - LIRC_DEVICES setting to add support for tira receiver device
lirc_devices_ttusbir - LIRC_DEVICES setting to add support for ttusb receiver device
lirc_devices_tuxbox - LIRC_DEVICES setting to add support for tuxbox receiver device
lirc_devices_tvbox - LIRC_DEVICES setting to add support for tvbox receiver device
lirc_devices_udp - LIRC_DEVICES setting to add support for udp receiver device
lirc_devices_uirt2 - LIRC_DEVICES setting to add support for uirt2 receiver device
lirc_devices_uirt2_raw - LIRC_DEVICES setting to add support for uirt2_raw receiver device
lirc_devices_usbirboy - LIRC_DEVICES setting to add support for the usbirboy homebrew device
lirc_devices_usb_uirt_raw - LIRC_DEVICES setting to add support for usb_uirt_raw receiver device
lirc_devices_usbx - LIRC_DEVICES setting to add support for usbx receiver device
lirc_devices_userspace - LIRC_DEVICES setting to add support for userspace receiver device
lirc_devices_wpc8769l - LIRC_DEVICES setting to add support for wpc8769l receiver device
lirc_devices_xboxusb - LIRC_DEVICES setting to add support for xboxusb receiver device
livecd - !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during livecd building
lm_sensors - Adds linux lm_sensors (hardware sensors) support
lua - Enable Lua scripting support
lzma - Support for LZMA (de)compression algorithm
lzo - Enables support for lzo compression
m17n-lib - Enable m17n-lib support
mad - Adds support for mad (high-quality mp3 decoder library and cli frontend)
maildir - Adds support for maildir (~/.maildir) style mail spools
mailwrapper - Adds mailwrapper support to allow multiple MTAs to be installed
matroska - Adds support for the matroska container format (extensions .mkv, .mka and .mks)
matrox - Adds Matrox MGA support to mplayer
mbox - Adds support for mbox (/var/spool/mail) style mail spools
memlimit - Adds memory usage limiting in supporting programs
mhash - Adds support for the mhash library
migemo - Enables migemo support for Japanese
mikmod - Adds libmikmod support to allow playing of SoundTracker-style music files
milter - Adds sendmail mail filter (milter) support
mime - Adds MIME support
minimal - Install a very minimal build (disables, for example, plugins, fonts, most drivers, non-critical features)
misdn_cards_avmfritz - MISDN_CARDS setting to build driver for avmfritz
misdn_cards_hfcmulti - MISDN_CARDS setting to build driver for hfcmulti
misdn_cards_hfcpci - MISDN_CARDS setting to build driver for hfcpci
misdn_cards_hfcsmini - MISDN_CARDS setting to build driver for hfcsmini
misdn_cards_hfcsusb - MISDN_CARDS setting to build driver for hfcsusb
misdn_cards_netjetpci - MISDN_CARDS setting to build driver for netjetpci
misdn_cards_sedlfax - MISDN_CARDS setting to build driver for sedlfax
misdn_cards_w6692pci - MISDN_CARDS setting to build driver for w6692pci
misdn_cards_xhfc - MISDN_CARDS setting to build driver for xhfc
mmap - Adds mmap (memory map) support
mms - Support for Microsoft Media Server (MMS) streams
mmx - Adds support for optimizations for Pentium MMX and Athlon class processors
mng - Adds support for libmng (MNG images)
modplug - Adds libmodplug support
modules - Build the kernel modules
mono - Build Mono bindings to support dotnet type stuff
motif - Adds support for the Motif toolkit
mozilla - Adds support for the Mozilla web-browser
mp3 - Add support for reading mp3 files
mp4 - Support for MP4 container format
mpeg - Adds libmpeg3 support to various packages
mpi - Adds 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
msql - Adds support for the MSQL database server
mssql - Adds support for Microsoft SQL Server database
mtp - Enable support for Media Transfer Protocol
mule - Adds 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 - Adds mySQL Database support
mysqli - Adds support for the improved mySQL libraries
nas - Adds support for network audio sound
ncurses - Adds ncurses support (console display library)
neon - Enable optimization support for ARM NEON processors
netbeans_modules_apisupport - enables apisupport module
netbeans_modules_cnd - enables C/C++ development support
netbeans_modules_dlight - enables framework for creation of Observability Tools using DTrace
netbeans_modules_enterprise - enables enterprise development support
netbeans_modules_ergonomics - enables ergonomics features
netbeans_modules_groovy - enables Groovy and Grails development support
netbeans_modules_gsf - enables support for web client development
netbeans_modules_harness - enables harness support
netbeans_modules_ide - enables Netbeans IDE
netbeans_modules_identity - enables identity module
netbeans_modules_j2ee - enables J2EE development support
netbeans_modules_java - enables Java development support
netbeans_modules_javacard - enables cluster for JavaCard development
netbeans_modules_javafx - enables JavaFX development support
netbeans_modules_mobility - enables support for development of mobile applications
netbeans_modules_nb - enables Netbeans branding
netbeans_modules_php - enables PHP development support
netbeans_modules_profiler - enables Java profiler
netbeans_modules_ruby - enables Ruby development support
netbeans_modules_soa - enables SOA development support
netbeans_modules_visualweb - enables visual web development support
netbeans_modules_webcommon - enables javascript libraries and web client tools
netbeans_modules_websvccommon - enables common support for web services development
netbeans_modules_xml - enables XML related development support (schema, validation, WSDL, etc.)
netboot - Enables network booting
netcdf - Enable NetCDF data format support
networkmanager - Enable net-misc/networkmanager support
neXt - Enable neXt toolkit
nginx_modules_http_access - This module provides a simple host-based access control.
nginx_modules_http_addition - This module adds contents of other locations before and after the current location's content.
nginx_modules_http_auth_basic - This module protects your site or parts of it with username and password based on HTTP Basic Authentication.
nginx_modules_http_autoindex - This module provides automatic directory listings.
nginx_modules_http_browser - This module creates variables, the values of which depend on the request header "User-agent".
nginx_modules_http_cache_purge - External module adding ability to purge content from nginx's FastCGI and proxy caches.
nginx_modules_http_charset - This module can reencode data of one encoding into another.
nginx_modules_http_dav - This module adds the HTTP and WebDAV methods PUT, DELETE, MKCOL, COPY and MOVE.
nginx_modules_http_degradation - Unknown
nginx_modules_http_empty_gif - This module keeps a 1x1 transparent GIF in memory that can be served very quickly.
nginx_modules_http_fastcgi - This module allows Nginx to interact with FastCGI processes and control what parameters are passed to the process.
nginx_modules_http_flv - This module provides the ability to seek within FLV (Flash) files using time-based offsets.
nginx_modules_http_geo - This module creates variables, whose values depend on the IP-address of the client.
nginx_modules_http_geoip - This module creates variables based on the IP-address of the client matched against the MaxMind GeoIP binary files.
nginx_modules_http_gzip - This module allows for on-the-fly gzip compression.
nginx_modules_http_gzip_static - Before serving a file from disk to a gzip-enabled client, this module will look for a precompressed file in the same location.
nginx_modules_http_headers_more - Set and clear input and output headers
nginx_modules_http_image_filter - This module is a filter for transforming JPEG, GIF and PNG images.
nginx_modules_http_limit_req - This module allows you to limit the number of requests for a given session.
nginx_modules_http_limit_zone - This module makes it possible to limit the number of simultaneous connections for the assigned session
nginx_modules_http_map - This module allows you to classify, or map a set of values into a different set of values and store the result in a variable.
nginx_modules_http_memcached - You can use this module to perform simple caching.
nginx_modules_http_passenger - Passenger makes deployment of Ruby web applications a breeze.
nginx_modules_http_perl - This module makes it possible to execute Perl directly within Nginx and call Perl via SSI.
nginx_modules_http_proxy - This module makes it possible to transfer requests to another server.
nginx_modules_http_push - External module turning Nginx into an adept HTTP Push and Comet server.
nginx_modules_http_random_index - Pick a random directory index from a directory.
nginx_modules_http_realip - This module allows to change the client's IP address to value from request header (e. g. X-Real-IP or X-Forwarded-For).
nginx_modules_http_referer - This module makes it possible to block access to the site with the incorrect values of line "Referer" in the request header.
nginx_modules_http_rewrite - This module makes it possible to change URI using regular expressions (PCRE), and to redirect and select configuration depending on variables.
nginx_modules_http_scgi - An implementation of the Simple Common Gateway Interface.
nginx_modules_http_secure_link - This module computes and checks request URLs for a required security token.
nginx_modules_http_split_clients - This module provides A/B testing support.
nginx_modules_http_ssi - This module provides a filter which processes Server-Side Includes (SSI) in the input.
nginx_modules_http_stub_status - This module provides the ability to get some status from nginx.
nginx_modules_http_sub - This module can search and replace text in the nginx response.
nginx_modules_http_upstream_ip_hash - This module provides the ability to distribute upstream requests based on the IP-address of the client.
nginx_modules_http_userid - This module gives out cookies for identification of clients.
nginx_modules_http_uwsgi - External module for the uWSGI protocol for python web apps.
nginx_modules_http_xslt - This module is a filter which converts an XML response with the aid of one or more XSLT templates.
nginx_modules_mail_imap - This module provides IMAP proxy capability.
nginx_modules_mail_pop3 - This module provides POP3 proxy capability.
nginx_modules_mail_smtp - This module provides SMTP proxy capability.
nis - Support for NIS/YP services
nls - Adds 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
nocxx - Old flag -- USE=cxx from now on
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 - Adds support/bindings for the Ocaml language
ocamlopt - Enables ocamlopt support (ocaml native code compiler) -- Produces faster programs (Warning: you have to disable/enable it at a global scale)
oci8 - Adds 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 - Adds ODBC Support (Open DataBase Connectivity)
ofed_drivers_cxgb3 - Chelsio T3 RNIC driver
ofed_drivers_ehca - IBM InfiniBand HCA (ehca) driver
ofed_drivers_ipathverbs - QLogic InfiniPath HCA driver
ofed_drivers_mlx4 - Mellanox ConnectX InfiniBand HCA driver
ofed_drivers_mthca - Mellanox InfiniBand HCA driver
ofed_drivers_nes - NetEffect Ethernet Server Cluster Adapter driver
offensive - Enables potentially offensive items in packages
ofx - Enable support for importing (and exporting) OFX (Open Financial eXchange) data files
ogg - Adds support for the Ogg container format (commonly used by Vorbis, Theora and flac)
old-linux - Add support for linux-2.4 and older
openal - Adds support for the Open Audio Library
openexr - Support for the OpenEXR graphics file format
opengl - Adds 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
osc - Enables support for Open Sound Control
oscar - Enable Oscar (AIM/ICQ) IM protocol support
oss - Adds support for OSS (Open Sound System)
pam - Adds 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 - Adds support for PCMCIA slots/devices found on laptop computers
pcntl - Adds support for process creation functions
pcre - Adds support for Perl Compatible Regular Expressions
pda - Adds support for portable devices
pdf - Adds general support for PDF (Portable Document Format), this replaces the pdflib and cpdflib flags
perl - Adds optional support/bindings for the Perl language
php - Include support for the PHP language
php_targets_php5-2 - Build against PHP 5.2
php_targets_php5-3 - Build against PHP 5.3
php_targets_php5-4 - Build against PHP 5.4
php_targets_php5-5 - Build against PHP 5.5
plasma - Build optional plasma widgets that require kde-base/libplasma
plotutils - Add support for plotutils (library for 2-D vector graphics)
png - Adds support for libpng (PNG images)
policykit - Enable PolicyKit authentication support
portaudio - Adds support for the crossplatform portaudio audio API
posix - Adds support for POSIX-compatible functions
postgres - Adds support for the postgresql database
ppds - Adds support for automatically generated ppd (printing driver) files
prefix - Defines if a Gentoo Prefix offset installation is used
prelude - Adds support/bindings for the Prelude Intrusion Detection System
profile - Adds support for software performance analysis (will likely vary from ebuild to ebuild)
pulseaudio - Adds support for PulseAudio sound server
python - Adds optional support/bindings for the Python language
qdbm - Adds support for the qdbm (Quick Database Manager) library
qemu_softmmu_targets_alpha - system emulation target
qemu_softmmu_targets_arm - system emulation target
qemu_softmmu_targets_cris - system emulation target
qemu_softmmu_targets_i386 - system emulation target
qemu_softmmu_targets_lm32 - LatticeMico32 system emulation target
qemu_softmmu_targets_m68k - system emulation target
qemu_softmmu_targets_microblaze - system emulation target
qemu_softmmu_targets_microblazeel - system emulation target
qemu_softmmu_targets_mips - system emulation target
qemu_softmmu_targets_mips64 - system emulation target
qemu_softmmu_targets_mips64el - system emulation target
qemu_softmmu_targets_mipsel - system emulation target
qemu_softmmu_targets_ppc - system emulation target
qemu_softmmu_targets_ppc64 - system emulation target
qemu_softmmu_targets_ppcemb - system emulation target
qemu_softmmu_targets_s390x - system emulation target
qemu_softmmu_targets_sh4 - system emulation target
qemu_softmmu_targets_sh4eb - system emulation target
qemu_softmmu_targets_sparc - system emulation target
qemu_softmmu_targets_sparc64 - system emulation target
qemu_softmmu_targets_x86_64 - system emulation target
qemu_softmmu_targets_xtensa - system emulation target
qemu_softmmu_targets_xtensaeb - system emulation target
qemu_user_targets_alpha - userspace emulation target
qemu_user_targets_arm - userspace emulation target
qemu_user_targets_armeb - userspace emulation target
qemu_user_targets_cris - userspace emulation target
qemu_user_targets_i386 - userspace emulation target
qemu_user_targets_m68k - userspace emulation target
qemu_user_targets_microblaze - userspace emulation target
qemu_user_targets_microblazeel - userspace emulation target
qemu_user_targets_mips - userspace emulation target
qemu_user_targets_mips64 - userspace emulation target
qemu_user_targets_mips64el - userspace emulation target
qemu_user_targets_mipsel - userspace emulation target
qemu_user_targets_ppc - userspace emulation target
qemu_user_targets_ppc64 - userspace emulation target
qemu_user_targets_ppc64abi32 - userspace emulation target
qemu_user_targets_s390x - userspace emulation target
qemu_user_targets_sh4 - userspace emulation target
qemu_user_targets_sh4eb - userspace emulation target
qemu_user_targets_sparc - userspace emulation target
qemu_user_targets_sparc32plus - userspace emulation target
qemu_user_targets_sparc64 - userspace emulation target
qemu_user_targets_unicore32 - userspace emulation target
qemu_user_targets_x86_64 - userspace emulation target
qmail-spp - Adds support for qmail SMTP plugins
qt4 - Adds support for the Qt GUI/Application Toolkit version 4.x
quicktime - Adds support for OpenQuickTime
radius - Adds support for RADIUS authentication
raw - Add support for raw image formats
rdesktop - Adds support for the remote desktop protocol, usually used to connect to Windows servers
readline - Enables support for libreadline, a GNU line-editing library that almost everyone wants
recode - Enables support for the GNU recode library
rss - Enables support for RSS feeds
ruby - Adds support/bindings for the Ruby language
ruby_targets_jruby - Build with JRuby
ruby_targets_rbx - Build with Rubinius
ruby_targets_ree18 - Build with Ruby Enterprise Edition 1.8.x
ruby_targets_ruby18 - Build with MRI Ruby 1.8.x
ruby_targets_ruby19 - Build with MRI Ruby 1.9.x
samba - Adds support for SAMBA (Windows File and Printer sharing)
sane_backends_abaton - SANE_BACKENDS setting for building the abaton backend
sane_backends_agfafocus - SANE_BACKENDS setting for building the agfafocus backend
sane_backends_apple - SANE_BACKENDS setting for building the apple backend
sane_backends_artec - SANE_BACKENDS setting for building the artec backend
sane_backends_artec_eplus48u - SANE_BACKENDS setting for building the artec_eplus48u backend
sane_backends_as6e - SANE_BACKENDS setting for building the as6e backend
sane_backends_avision - SANE_BACKENDS setting for building the avision backend
sane_backends_bh - SANE_BACKENDS setting for building the bh backend
sane_backends_canon - SANE_BACKENDS setting for building the canon backend
sane_backends_canon630u - SANE_BACKENDS setting for building the canon630u backend
sane_backends_canon_dr - SANE_BACKENDS setting for building the canon_dr backend
sane_backends_canon_pp - SANE_BACKENDS setting for building the canon_pp backend
sane_backends_cardscan - SANE_BACKENDS setting for building the cardscan backend
sane_backends_coolscan - SANE_BACKENDS setting for building the coolscan backend
sane_backends_coolscan2 - SANE_BACKENDS setting for building the coolscan2 backend
sane_backends_coolscan3 - SANE_BACKENDS setting for building the coolscan3 backend
sane_backends_dc210 - SANE_BACKENDS setting for building the dc210 backend
sane_backends_dc240 - SANE_BACKENDS setting for building the dc240 backend
sane_backends_dc25 - SANE_BACKENDS setting for building the dc25 backend
sane_backends_dell1600n_net - SANE_BACKENDS setting for building the dell1600n_net backend
sane_backends_dmc - SANE_BACKENDS setting for building the dmc backend
sane_backends_epjitsu - SANE_BACKENDS setting for building the epjitsu backend
sane_backends_epson - SANE_BACKENDS setting for building the epson backend
sane_backends_epson2 - SANE_BACKENDS setting for building the epson2 backend
sane_backends_fujitsu - SANE_BACKENDS setting for building the fujitsu backend
sane_backends_genesys - SANE_BACKENDS setting for building the genesys backend
sane_backends_gt68xx - SANE_BACKENDS setting for building the gt68xx backend
sane_backends_hp - SANE_BACKENDS setting for building the hp backend
sane_backends_hp3500 - SANE_BACKENDS setting for building the hp3500 backend
sane_backends_hp3900 - SANE_BACKENDS setting for building the hp3900 backend
sane_backends_hp4200 - SANE_BACKENDS setting for building the hp4200 backend
sane_backends_hp5400 - SANE_BACKENDS setting for building the hp5400 backend
sane_backends_hp5590 - SANE_BACKENDS setting for building the hp5590 backend
sane_backends_hpljm1005 - SANE_BACKENDS setting for building the hpljm1005 backend
sane_backends_hpsj5s - SANE_BACKENDS setting for building the hpsj5s backend
sane_backends_hs2p - SANE_BACKENDS setting for building the hs2p backend
sane_backends_ibm - SANE_BACKENDS setting for building the ibm backend
sane_backends_kodak - SANE_BACKENDS setting for building the kodak backend
sane_backends_kvs1025 - SANE_BACKENDS setting for building the kvs1025 backend
sane_backends_kvs20xx - SANE_BACKENDS setting for building the kvs20xx backend
sane_backends_leo - SANE_BACKENDS setting for building the leo backend
sane_backends_lexmark - SANE_BACKENDS setting for building the lexmark backend
sane_backends_ma1509 - SANE_BACKENDS setting for building the ma1509 backend
sane_backends_magicolor - SANE_BACKENDS setting for building the magicolor backend
sane_backends_matsushita - SANE_BACKENDS setting for building the matsushita backend
sane_backends_microtek - SANE_BACKENDS setting for building the microtek backend
sane_backends_microtek2 - SANE_BACKENDS setting for building the microtek2 backend
sane_backends_mustek - SANE_BACKENDS setting for building the mustek backend
sane_backends_mustek_pp - SANE_BACKENDS setting for building the mustek_pp backend
sane_backends_mustek_usb - SANE_BACKENDS setting for building the mustek_usb backend
sane_backends_mustek_usb2 - SANE_BACKENDS setting for building the mustek_usb2 backend
sane_backends_nec - SANE_BACKENDS setting for building the nec backend
sane_backends_net - SANE_BACKENDS setting for building the net backend
sane_backends_niash - SANE_BACKENDS setting for building the niash backend
sane_backends_nothing - SANE_BACKENDS setting if you want no backend at all
sane_backends_p5 - SANE_BACKENDS setting for building the p5 backend
sane_backends_pie - SANE_BACKENDS setting for building the pie backend
sane_backends_pint - SANE_BACKENDS setting for building the pint backend
sane_backends_pixma - SANE_BACKENDS setting for building the pixma backend
sane_backends_plustek - SANE_BACKENDS setting for building the plustek backend
sane_backends_plustek_pp - SANE_BACKENDS setting for building the plustek_pp backend
sane_backends_pnm - SANE_BACKENDS settings for building the pnm test backend, considered a possible security risk
sane_backends_qcam - SANE_BACKENDS setting for building the qcam backend
sane_backends_ricoh - SANE_BACKENDS setting for building the ricoh backend
sane_backends_rts8891 - SANE_BACKENDS setting for building the rts8891 backend
sane_backends_s9036 - SANE_BACKENDS setting for building the s9036 backend
sane_backends_sceptre - SANE_BACKENDS setting for building the sceptre backend
sane_backends_sharp - SANE_BACKENDS setting for building the sharp backend
sane_backends_sm3600 - SANE_BACKENDS setting for building the sm3600 backend
sane_backends_sm3840 - SANE_BACKENDS setting for building the sm3840 backend
sane_backends_snapscan - SANE_BACKENDS setting for building the snapscan backend
sane_backends_sp15c - SANE_BACKENDS setting for building the sp15c backend
sane_backends_st400 - SANE_BACKENDS setting for building the st400 backend
sane_backends_stv680 - SANE_BACKENDS setting for building the stv680 backend
sane_backends_tamarack - SANE_BACKENDS setting for building the tamarack backend
sane_backends_teco1 - SANE_BACKENDS setting for building the teco1 backend
sane_backends_teco2 - SANE_BACKENDS setting for building the teco2 backend
sane_backends_teco3 - SANE_BACKENDS setting for building the teco3 backend
sane_backends_test - SANE_BACKENDS setting for building the test backend
sane_backends_u12 - SANE_BACKENDS setting for building the u12 backend
sane_backends_umax - SANE_BACKENDS setting for building the umax backend
sane_backends_umax1220u - SANE_BACKENDS setting for building the umax1220u backend
sane_backends_umax_pp - SANE_BACKENDS setting for building the umax_pp backend
sane_backends_xerox_mfp - SANE_BACKENDS setting for building the xerox_mfp backend
sasl - Adds 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 - Adds support for scanner hardware (e.g. build the sane frontend in kdegraphics)
sdl - Adds support for Simple Direct Layer (media library)
seamonkey - Adds 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 - Adds persistent session support
sharedmem - Adds support for shared memory use
shorten - Adds support for the shorten audio compressor
simplexml - support for SimpleXML
skey - Enable S/Key (Single use password) authentication support
slang - Adds support for the slang text display library (it's like ncurses, but different)
slp - Adds Service Locator Protocol support
smartcard - Enables smartcard support
smp - Enable support for multiprocessors or multicore systems
sndfile - Adds support for libsndfile
snmp - Adds support for the Simple Network Management Protocol if available
soap - Adds support for SOAP (Simple Object Access Protocol)
sockets - Adds support for tcp/ip sockets
socks5 - Adds support for the socks5 proxy
sound - Enable sound support
source - Zip the sources and install them
sox - Adds support for Sound eXchange (SoX)
speex - Adds support for the speex audio codec (used for speech)
spell - Adds dictionary support
sqlite - Adds support for sqlite - embedded sql database
sqlite3 - Adds support for sqlite3 - embedded sql database
sse - fast floating point optimization for PentiumIII+ class chips
sse2 - faster floating point optimization for SSE2 capable chips
ssl - Adds 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 libraries
subversion - Enable subversion (version control system) support
suid - Enable setuid root program, with potential security risks
svg - Adds support for SVG (Scalable Vector Graphics)
svga - Adds support for SVGAlib (graphics library)
sybase - Adds support for the Sybase SQL Database Server
sybase-ct - Adds support for Sybase-CT
symlink - Force kernel ebuilds to automatically update the /usr/src/linux symlink
syslog - Enables support for syslog
sysvipc - Support for System V-compatible inter-process communication
szip - Use the szip compression library
taglib - Enable tagging support with taglib
tcl - Adds support the Tcl language
tcmalloc - Use the dev-util/google-perftools libraries to replace the malloc() implementation with a possibly faster one
tcpd - Adds 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 - Adds support for the Theora Video Compression Codec
threads - Adds threads support for various packages. Usually pthreads
tidy - Adds support for HTML Tidy
tiff - Adds support for the TIFF image format
timidity - Build with Timidity++ (MIDI sequencer) support
tk - Adds support for Tk GUI toolkit
tokenizer - Adds support for the PHP file parser
truetype - Adds support for FreeType and/or FreeType2 fonts
uclibc - Enable uclibc specific patches and build or link uclibc
udev - Enable sys-fs/udev integration (device discovery, power and storage device support, etc)
unicode - Adds support for Unicode
usb - Adds USB support to applications that have optional USB support (e.g. cups)
userland_BSD - USERLAND setting for systems using BSDish userland (FreeBSD OpenBSD NetBSD DragonFly)
userland_GNU - USERLAND setting for systems that use the GNU userland tools
v4l - Enable support for video4linux (using linux-headers or userspace libv4l libraries)
v4l2 - Enable support for video4linux (DEPRECATED: Use USE v4l for your package to enable v4l2 or libv4l support)
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
vhosts - Adds support for installing web-based applications into a virtual-hosting environment
video_cards_apm - VIDEO_CARDS setting to build driver for apm video cards
video_cards_ark - VIDEO_CARDS setting to build driver for ark video cards
video_cards_ast - VIDEO_CARDS setting to build driver for ASpeedTech video cards
video_cards_chips - VIDEO_CARDS setting to build driver for chips video cards
video_cards_cirrus - VIDEO_CARDS setting to build driver for cirrus video cards
video_cards_cyrix - VIDEO_CARDS setting to build driver for cyrix video cards
video_cards_dummy - VIDEO_CARDS setting to build driver for dummy video cards
video_cards_epson - VIDEO_CARDS setting to build driver for epson video cards
video_cards_fbdev - VIDEO_CARDS setting to build driver for fbdev video cards
video_cards_fglrx - VIDEO_CARDS setting to build driver for fglrx video cards
video_cards_geode - VIDEO_CARDS setting to build driver for AMD Geode GX and LX video cards
video_cards_glint - VIDEO_CARDS setting to build driver for glint video cards
video_cards_i128 - VIDEO_CARDS setting to build driver for Number 9 I128 video cards
video_cards_i740 - VIDEO_CARDS setting to build driver for Intel i740 video cards
video_cards_impact - VIDEO_CARDS setting to build driver for impact video cards
video_cards_intel - VIDEO_CARDS setting to build driver for Intel video cards
video_cards_mach64 - VIDEO_CARDS setting to build driver for mach64 video cards
video_cards_mga - VIDEO_CARDS setting to build driver for mga video cards
video_cards_neomagic - VIDEO_CARDS setting to build driver for neomagic video cards
video_cards_newport - VIDEO_CARDS setting to build driver for newport video cards
video_cards_none - VIDEO_CARDS setting to build no drivers (useful when using binary drivers)
video_cards_nouveau - VIDEO_CARDS setting to build reverse-engineered driver for nvidia cards
video_cards_nsc - VIDEO_CARDS setting to build driver for nsc video cards
video_cards_nv - VIDEO_CARDS setting to build driver for nv video cards
video_cards_nvidia - VIDEO_CARDS setting to build driver for nvidia video cards
video_cards_omapfb - VIDEO_CARDS setting to build driver for omapfb video cards
video_cards_qxl - VIDEO_CARDS setting to build driver for qxl (QEMU virtual GPU)
video_cards_r100 - VIDEO_CARDS setting to build only r100 based chips code for radeon
video_cards_r128 - VIDEO_CARDS setting to build driver for ATI r128 video cards
video_cards_r200 - VIDEO_CARDS setting to build only r200 based chips code for radeon
video_cards_r300 - VIDEO_CARDS setting to build only r300, r400 and r500 based chips code for radeon
video_cards_r600 - VIDEO_CARDS setting to build only r600 and r700 based chips code for radeon
video_cards_radeon - VIDEO_CARDS setting to build driver for ATI radeon video cards
video_cards_radeonhd - VIDEO_CARDS setting to build driver for ATI radeon HD video cards (radeon also works)
video_cards_rendition - VIDEO_CARDS setting to build driver for rendition video cards
video_cards_s3 - VIDEO_CARDS setting to build driver for s3 video cards
video_cards_s3virge - VIDEO_CARDS setting to build driver for s3virge video cards
video_cards_savage - VIDEO_CARDS setting to build driver for savage video cards
video_cards_siliconmotion - VIDEO_CARDS setting to build driver for siliconmotion video cards
video_cards_sis - VIDEO_CARDS setting to build driver for SiS video cards
video_cards_sisusb - VIDEO_CARDS setting to build driver for SiS USB video cards
video_cards_sunbw2 - VIDEO_CARDS setting to build driver for sunbw2 video cards
video_cards_suncg14 - VIDEO_CARDS setting to build driver for suncg14 video cards
video_cards_suncg3 - VIDEO_CARDS setting to build driver for suncg3 video cards
video_cards_suncg6 - VIDEO_CARDS setting to build driver for suncg6 video cards
video_cards_sunffb - VIDEO_CARDS setting to build driver for sunffb video cards
video_cards_sunleo - VIDEO_CARDS setting to build driver for sunleo video cards
video_cards_suntcx - VIDEO_CARDS setting to build driver for suntcx video cards
video_cards_svga - VIDEO_CARDS setting to build driver for svga (VMware Virtual GPU) via Gallium
video_cards_tdfx - VIDEO_CARDS setting to build driver for tdfx video cards
video_cards_tga - VIDEO_CARDS setting to build driver for tga video cards
video_cards_trident - VIDEO_CARDS setting to build driver for trident video cards
video_cards_tseng - VIDEO_CARDS setting to build driver for tseng video cards
video_cards_v4l - VIDEO_CARDS setting to build driver for v4l video cards
video_cards_vesa - VIDEO_CARDS setting to build driver for vesa video cards
video_cards_via - VIDEO_CARDS setting to build driver for via video cards
video_cards_virtualbox - VIDEO_CARDS setting to build driver for virtualbox emulation
video_cards_vmware - VIDEO_CARDS setting to build driver for vmware video cards
video_cards_voodoo - VIDEO_CARDS setting to build driver for voodoo video cards
video_cards_xgi - VIDEO_CARDS setting to build driver for xgi video cards
videos - Install optional video files (used in some games)
vim-syntax - Pulls in related vim syntax scripts
vmware_guest_freebsd - Install VMware Tools for FreeBSD guests
vmware_guest_linux - Install VMware Tools for Linux guests
vmware_guest_netware - Install VMware Tools for Netware guests
vmware_guest_solaris - Install VMware Tools for Solaris guests
vmware_guest_windows - Install VMware Tools for Windows 2000+ guests
vmware_guest_winPre2k - Install VMware Tools for Windows 95/98/ME guests
vnc - Enable VNC (remote desktop viewer) support
vorbis - Adds support for the OggVorbis audio codec
wavpack - Add support for wavpack audio compression tools
wddx - Adds support for Web Distributed Data eXchange
wifi - Enable wireless network functions
win32codecs - use win32codecs package for dll avi decoding support (wmv and what not)
wmf - Adds support for the Windows Metafile vector image format
wxwidgets - Adds support for wxWidgets/wxGTK GUI toolkit
X - Adds support for X11
x264 - Enable h264 encoding using x264
xattr - Adds support for extended attributes (filesystem-stored metadata)
Xaw3d - Adds support for the 3d athena widget set
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 - Adds xface support used to allow a small image of xface format to be included in an email via the header 'X-Face'
xfce_plugins_brightness - Build xfce4-brightness-plugin for panel
xfce_plugins_clock - Build xfce4-orageclock-plugin for panel
xfce_plugins_logout - Build libxfsm-logout-plugin (logout) plugin for panel
xfce_plugins_trash - Build thunar-tpa (trash) plugin for panel
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 - Adds support for XPM graphics format
xscreensaver - Adds support for XScreenSaver extension
xsl - Check/Support flag for XSL library (version 1)
xtables_addons_account - ACCOUNT target is a high performance accounting system for large local networks
xtables_addons_chaos - CHAOS target causes confusion on the other end by doing odd things with incoming packets
xtables_addons_checksum - CHECKSUM target computes and fills in the checksum in a packet that lacks a checksum
xtables_addons_condition - matches if a specific condition variable is (un)set
xtables_addons_delude - DELUDE target will reply to a SYN packet with SYN-ACK, and to all other packets with an RST
xtables_addons_dhcpmac - DHCPMAC target/match in conjunction with ebtables can be used to completely change all MAC addresses from and to a VMware-based virtual machine
xtables_addons_dnetmap - DNETMAP target allows dynamic two-way 1:1 mapping of IPv4 subnets
xtables_addons_echo - ECHO target sends back all packets it received
xtables_addons_fuzzy - matches a rate limit based on a fuzzy logic controller (FLC)
xtables_addons_geoip - match a packet by its source or destination country
xtables_addons_gradm - match packets based on grsecurity RBAC status
xtables_addons_iface - match allows to check interface states
xtables_addons_ipmark - IPMARK target allows mark a received packet basing on its IP address
xtables_addons_ipp2p - matches certain packets in P2P flows
xtables_addons_ipset - enables build of ipset related modules and tools
xtables_addons_ipset4 - enables build of ipset-4.x related modules and tools
xtables_addons_ipset6 - enables build of ipset-6.x related modules and tools
xtables_addons_ipv4options - match against a set of IPv4 header options
xtables_addons_length2 - matches the length of a packet against a specific value or range of values
xtables_addons_logmark - LOGMARK target will log packet and connection marks to syslog
xtables_addons_lscan - match detects simple low-level scan attemps based upon the packet's contents
xtables_addons_pknock - match implements so-called "port knocking", a stealthy system for network authentication
xtables_addons_psd - match attempts to detect TCP and UDP port scans (derived from Solar Designer's scanlogd)
xtables_addons_quota2 - match implements a named counter which can be increased or decreased on a per-match basis
xtables_addons_rawnat - The RAWSNAT and RAWDNAT targets provide stateless network address translation
xtables_addons_steal - STEAL target is like DROP, but does not throw an error when used in the OUTPUT chain
xtables_addons_sysrq - SYSRQ target allows to remotely trigger sysrq on the local machine over the network
xtables_addons_tarpit - TARPIT target captures and holds incoming TCP connections using no local per-connection resources
xtables_addons_tee - TEE target will clone a packet and redirect this clone to another machine on the local network segment
xulrunner - Build native browser integration against xulrunner instead of firefox or seamonkey
xv - Adds in optional support for the Xvideo extension (an X API for video playback)
xvid - Adds support for xvid.org's open-source mpeg-4 codec
yahoo - Enable Yahoo Messenger IM protocol support
yaz - Adds in optional support for the Z39.50 Protocol for Information Retrieval (YAZ)
zeroconf - Support for DNS Service Discovery (DNS-SD)
zlib - Adds support for zlib (de)compression
zsh-completion - Enable zsh completion support

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