Global USE flags

Flag	Description	Packages
X		4
alsa		5
cuda		2
debug	Debug support	10
discord	Enable rich Discord presence	3
doc		4
examples		3
ffmpeg		2
fuse	ZX Spectrum (Fuse)	2
gles2	Enable GLES2 support	2
gtk		3
jack		3
kde		2
nls		2
openmp		3
pdal	Support for point cloud file formats via PDAL	2
pulseaudio		5
python		3
qt6		2
sdl		4
static-libs		5
systemd		2
tbb	Build with TBB support	2
test		23
tools	Install extra tools	2
udev		2
wayland		2

Category USE flags

app-emulation

Flag	Description	Packages
jit		2

games-action

Flag	Description	Packages
opus		3
sanitizer	Build with address sanitiser for better crash logs	3
sndfile		3

games-arcade

Flag	Description	Packages
bundled-courses	Install bundled courses.	2
bundled-songs	Installed bundled songs.	2

games-emulation

Flag	Description	Packages
cubeb	Enable cubeb audio support	2
libretro	Build libretro core	2
openal		2
opengl		5
vulkan	Enable Vulkan graphics support	5
web-service	Enable web services (telemetry, etc.)	2

mpv-plugin

Flag	Description	Packages
autoload	Auto-load the plugin	13

sys-auth

Flag	Description	Packages
gtk-doc		2

www-apps

Flag	Description	Packages
standalone	Install service files for standalone mode.	2

Local USE flags

app-cdr

qpxtool

Flag	Description
gui
internal-wt	Use internal CD/DVD writing implementation instead of cdrecord.
liteon-probe	Enable device probing in Lite-On plugin.

redumper

Flag	Description
clang	Use Clang compiler (workaround).

app-emulation

basiliskii

Flag	Description
jit-debug	Enable JIT debugger

app-misc

deltona

Flag	Description
admin	Administrative utilities like smv and reset-tpm-enrollments
chrome	Tools for Chromium-based browsers
desktop	Desktop utilities like umpv and mpv-sbs
git	Git utilities like git-open and merge-dependabot-prs
media	Media utilities like wait-for-disc and add-info-json
string	String utilities like is-ascii and ucwords
wine	Utilities for Wine like mkwineprefix and wineshell
www	Internet-related utilities like where-from and chrome-bisect-flags

app-office

glabels

Flag	Description
barcode	Enable barcode support with app-text/barcode
qrcode	Enables QR code support with media-gfx/qrencode
zlib

dev-libs

wolfssl

Flag	Description
cpu_flags_x86_aes
jni	Enable Java JNI support
sniffer	Enable sniffer via libpcap
writedup	Enable write duplication of WOLFSSL objects

dev-python

misaki

Flag	Description
l10n_en	English localization
l10n_ja
l10n_ko
l10n_vi
l10n_zh

orjson

Flag	Description
verify-provenance

snowflake-connector-python

Flag	Description
pandas	Enable pandas support
secure-local-storage	Enable secure local storage

dev-qt

qtwebkit

Flag	Description
video	Enable video playback support

games-arcade

stepmania

Flag	Description
crash-handler	Enable crash handler
gpl	Enable GPL-compatible build
jpeg
minimaid	Enable support for Minimaid hardware.
mp3
networking	Enable networking support.
ogg
parallel-port	Enable parallel port-based input devices.
profiling	Enable profiling.
wav	Enable WAV file support.
xinerama
xrandr	Enable XRandR support.

games-emulation

bsnes-hd

Flag	Description
ao
oss
xv

citra

Flag	Description
scripting	Enable RPC server for scripting

dosbox-x

Flag	Description
dynrec	Use recompiling cpu core instead of dynamic x86/x64 specific cpu core
fluidsynth	Use media-sound/fluidsynth for MIDI emulation
fpu	Enable FPU emulation
freetype	Enable FreeType support
hardened
midi	Enable MIDI support (with ALSA)
mt-32	Use media-libs/munt-mt32emu for MT-32 emulation
printer	Enable printer emulation
screenshots	Screenshots and movie recording
slirp	Enable libslirp support
unaligned	Enable unaligned memory access
xbrz	Enable support for xBRZ pixel scaler

libretro-flycast

Flag	Description
gles	Use simplified OpenGLES instead of full-scale OpenGL

libretro-mednafen-psx-hw

Flag	Description
cdrom	Enable physical CDROM support

libretro-meta

Flag	Description
bsnes-mercury	Nintendo - SNES / SFC (bsnes-mercury)
dolphin	Nintendo Gamecube/Wii (dolphin)
dosbox	DOS (DOSBox)
fceumm	Nintendo - NES / Famicom (FCEUmm)
flycast	Sega - Dreamcast/NAOMI (Flycast)
fmsx	Microsoft - MSX (fMSX)
genesis-plus-gx	Sega Genesis / Megadrive (genesis_plus_gx)
mame2003-plus	Arcade (MAME 2003 Plus)
mednafen-psx	Sony - PlayStation (Beetle PSX)
mednafen-psx-hw	Sony - Playstation (Beetle PSX HW)
pcsx-rearmed	Sony - PlayStation (PCSX ReARMed)
ppsspp	Sony PSP (ppsspp)
prboom	Doom (PrBoom)
puae	Commodore - Amiga (P-UAE)
snes9x	Nintendo - SNES / SFC (Snes9x - Current)
swanstation	Sony Playstation (swanstation)
tyrquake	Quake (TyrQuake)
vice-x64	Commodore 8-bit (vice)
vice-x64sc	Commodore 8-bit (vice)

libretro-ppsspp

Flag	Description
gbm	Use the Graphics Buffer Manager for EGL on KMS.
system-ffmpeg	Use system ffmpeg.

retroarch-assets

Flag	Description
materialui	Enable materialui assets
ozone	Emable ozone assets
rgui	Enable rgui assets
xmb	Enable xmb assets

xemu

Flag	Description
aio	Add support for AIO
io-uring	Enable efficient I/O via sys-libs/liburing
malloc-trim	Enable malloc_trim() support
membarrier	Enable membarrier syscall support
xattr

xenia-canary

Flag	Description
cpu_flags_x86_avx

yuzu

Flag	Description
compatibility-reporting	Enable compatibility reporting
llvm-libunwind
webengine	Use <pkg>dev-qt/qtwebengine</pkg> for embedded web browser

games-misc

render96ex

Flag	Description
eu	Use the EU ROM
goddard	Enable enhancements to Mario's face
jp	Use the Japanese ROM
models	Enable higher quality models
texture-fix	Enable texture bug fixes
textures	Install high quality texture replacements
us	Use the North American ROM

games-util

raphnet-tech-adapter-manager

Flag	Description
firmware	Install firmware

kde-misc

kate-wakatime

Flag	Description
aqua

media-fonts

noto

Flag	Description
ancient	Install fonts for historical scripts
brahmi	Install font for Brahmi script
coptic	Install Coptic font
cuneiform	Install Cuneiform font
cypriot	Install Cypriot font
deseret	Install Deseret font
display	Install Display variant fonts
duployan	Install Duployan font
extra	Keep extra fonts
hieroglyphs	Install fonts for hieroglyphs
l10n_
l10n_ban	Install fonts for Balinese script
l10n_bax	Install fonts for Bamum syllabary
l10n_ber	Install fonts for Berber script
l10n_bho	Install fonts for Kaithi script
l10n_bku	Install fonts for Buhid
l10n_blt	Install fonts for Tai Viet
l10n_bsq	Install fonts for Bassa alphabet (Vah)
l10n_bug	Install fonts for Buginese
l10n_bya	Install fonts for Tagbanwa alphabet
l10n_ccp	Install fonts for Chakma
l10n_cja	Install fonts for Cham
l10n_cmr	Install fonts for Mro
l10n_dv	Install fonts for Thaana
l10n_eky	Instal fonts for Kayah Li
l10n_hnn	Install fonts for Hanunó'o
l10n_hoc	Install fonts for Warang Citi
l10n_ii	Install fonts for Yi syllabary
l10n_iu	Install fonts for Canadian Aboriginal script
l10n_jv	Install fonts for Javanese script
l10n_khb	Install fonts for Tai Tham alphabet
l10n_kv	Install fonts for Old Permic script
l10n_lep	Install fonts for Lepcha
l10n_lif	Install fonts for Limbu
l10n_lis	Install fonts for Lisu (Fraser alphabet)
l10n_men	Install fonts for Mende Kikakui script
l10n_mjl	Install fonts for Takri script
l10n_mww	Install fonts for Pahawh Hmong and Miao
l10n_new	Install fonts for Newar
l10n_nod	Install fonts for Thai Tham alphabet
l10n_nqo	Install fonts for N'Ko alphabet
l10n_osa	Install fonts for Osage
l10n_rej	Install fonts for Rejang
l10n_saz	Install fonts for Saurashtra script
l10n_skr	Install fonts for Saraiki
l10n_srb	Install fonts for Sora Sompeng
l10n_su	Install fonts for Sundanese
l10n_syl	Install fonts for Sylheti
l10n_tbw	Install fonts for Tagbanwa alphabet
l10n_tmh	Install fonts for Tifinagh alphabet
l10n_vai	Install fonts for Vai syllabary
linear	Install Linear (Minoan) fonts
mono	Install monospace fonts
music	Install font for music notation
old-arabian	Install fonts for Old North and Old South Arabian
pau-cin-hau	Install font for Pau Cin Hau script
phagspa	Install for 'Phags-pa script
runic	Install Runic font
symbols	Install Symbols fonts

media-gfx

f3d

Flag	Description
alembic	Support for Alembic (.abc) files via <pkg>media-gfx/alembic</pkg>
assimp	Support for FBX, DAE, OFF, DXF, X and 3MF files via <pkg >media-libs/assimp</pkg>
exr	Support for OpenEXR images via <pkg>media-libs/openexr</pkg>
hdf	Support for VTKHDF, ExodusII and NetCDF file formats
occt	Support for STEP, IGES, BREP and XBF files via <pkg >sci-libs/opencascade</pkg>
vdb	Support for OpenVDB (.vdb) files
webp	Support for WebP images via <pkg>media-libs/libwebp</pkg>

media-sound

librespot

Flag	Description
portaudio

media-video

magewell-pro-capture

Flag	Description
weave	Do not enable deinterlacing. Warning: this stops "mwcap-control --video-output-deinterlace ..." from working.

tbc-tools

Flag	Description
teletext	Enable teletext export in ld-process-vbi

vapoursynth

Flag	Description
${PYTHON_REQUIRED_USE}
amd64
arm64
asm	Enable assembler code for x86 CPUs (requires <pkg >dev-lang/yasm</pkg>). Only valid on amd64 or x86.
guard-pattern	Adds 32 bytes on the left and the right sides of each frame, fills them with a certain value, and checks their integrity after each filter. It can be used to detect buggy filters that write a little outside the frame.
x86

net-analyzer

http-toolkit-bin

Flag	Description
suid

net-dns

pihole

Flag	Description
cron	Installs cron job

net-misc

curl-impersonate

Flag	Description
clients	Install the curl wrapper scripts

ipv6-config-update

Flag	Description
split-usr

sci-libs

vtk

Flag	Description
all-modules	Build all modules
boost	Add support for boost
cgns	Build support to handle CGNS data files
gdal	Support for gdal formatted data
gles2-only
imaging	Building Imaging modules
java
logging	Build the logging module
minimal
mpi
mysql
netcdf
odbc
opencascade	Enable OpenCASCADE support
openvdb	Build support to handle VDB data files
postgres
rendering	Building Redering modules
threads
tk
truetype
video_cards_nvidia
views	Building Views modules
vtkm	Build the viskores accelerations modules
web	Install web component

sci-ml

flash-attn

Flag	Description
rocm	Enable ROCm support.

sys-apps

kylemanna-systemd-utils

Flag	Description
amazon	Install Amazon Cloud Drive service
btrfs	Install units for btrfs
cmsis-dap	Unknown
crashplan	Install timer for Crashplan
ipv6
kodi	Install service to start Kodi
multilib
papertrail	Install Papertrail service
rssh	Install rssh service
storj	Install storj-dataserv-client.service
tahoe	Install Tahoe-related services
youtube	Install YouTube TV service

sys-auth

fprintd

Flag	Description
pam

libfprint

Flag	Description
introspection

x11-misc

rom-properties

Flag	Description
achievements	Enable achievement pop-ups.
astc	Enable ASTC texture support
cli	Build rpcli command.
crypt
lz4
lzo
pvr	Enable the PowerVR Native SDK subset for PVRTC decompression.
unice68	Enable UnICE68 for Atari ST SNDH files (GPLv3).
xbox-360	Enable support for reading from Xbox 360 binaries
xfce	Enable support for XFCE widget.
xml
zstd

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