Global USE flags

Flag	Description	Packages
${IUSE}		2
X	Enable support for e.g. fullscreen mode via X and the X C-language binding. It does not build a graphical interface	9
alsa		2
aom	Enable AV1 encoding/decoding support using <pkg>media-libs/libaom</pkg>	2
archive	Enable archives support in attachments via <pkg>app-arch/gnome-autoar</pkg>	2
cuda		8
curl		3
dbus	Control interface using DBUS. ctrl_dbus module	3
debug	Build binaries with debug symbols	5
doc		6
elogind	Use <pkg>sys-auth/elogind</pkg> for session tracking and suspend support.	2
examples	Build examples	2
extras		2
ffmpeg		6
gnome		4
gstreamer	Enable GStreamer based decoding support (currently supports only video decoding)	2
gtk		2
gtk-doc		4
gui	Installs rog-control-center(UI)	4
introspection		2
jack		2
jpeg		3
keyring		2
l10n_		2
ldap	Enable support for fetching contacts from an LDAP or Active Directory server using <pkg>net-nds/openldap</pkg>	2
libnotify	Enable desktop notifications through <pkg>x11-libs/libnotify</pkg>	2
opus		2
pipewire	Use pipewire to enable the camera monitor	2
png		3
pulseaudio	Pulseaudio driver	2
qt5		2
qt6		4
rocm		7
selinux		2
server	Build the loki server	2
spell		2
ssl		3
static-libs		2
systemd	Install systemd service file	11
test	Perform rocblas-test to compare the result between rocBLAS and system BLAS	18
tools	Build the loki tools logcli and loki-canary	3
truetype		2
udev	Install udev rules	3
v4l	Video4Linux2 video source	2
video_cards_nvidia		3
vpx	Enables VP8 and VP9 codec support using libvpx	3
wayland		6
webp		4
xml		2

Category USE flags

net-print

Flag	Description	Packages
servicetools		2

net-voip

Flag	Description	Packages
codec2	CODEC2 low-bitrate speech audio codec	2

sci-ml

Flag	Description	Packages
blis		3
cpu_flags_x86_avx		4
cpu_flags_x86_avx2		4
cpu_flags_x86_avx512_bf16		4
cpu_flags_x86_avx512_vnni		4
cpu_flags_x86_avx512f		4
cpu_flags_x86_avx512vbmi		4
cpu_flags_x86_avx_vnni		2
cpu_flags_x86_bmi2		3
cpu_flags_x86_f16c		3
cpu_flags_x86_fma3		3
cusparselt		2
distributed		2
fbgemm		2
flash		2
flexiblas		3
gloo		2
kineto		2
memefficient		2
mimalloc		2
mkl		2
mpi		2
nnpack		2
numpy		2
onednn		2
openblas		5
opencl		4
openmp		4
qnnpack		2
vulkan		3
wmma		3
xnnpack		2

sys-power

Flag	Description	Packages
openrc	[experimental] Installs OpenRC init files - officially unsupported	2

Local USE flags

app-admin

fluent-bit

Flag	Description
fluentbit_f
fluentbit_filters_
fluentbit_filters_${filter}
fluentbit_filters_alter_size	Enable alter_size filter
fluentbit_filters_aws	Enable aws filter
fluentbit_filters_expect	Enable expect filter
fluentbit_filters_grep	Enable grep filter
fluentbit_filters_kubernetes	Enable kubernetes filter
fluentbit_filters_lua	Enable Lua scripting filter
fluentbit_filters_modify	Enable modify filter
fluentbit_filters_nest	Enable nest filter"
fluentbit_filters_parser	Enable parser filter
fluentbit_filters_record_modifier	Enable record_modifier filter
fluentbit_filters_rewrite_tag	Enable tag rewrite filter
fluentbit_filters_stdout	Enable stdout filter
fluentbit_filters_tensorflow	Enable tensorflow filter
fluentbit_filters_throttle	Enable throttle filter
fluentbit_filters_throttle_size	Enable throttle size filter
fluentbit_input_plugins_collectd	Enable Collectd input plugin
fluentbit_input_plugins_cpu	Enable CPU input plugin
fluentbit_input_plugins_disk	Enable Disk input plugin
fluentbit_input_plugins_docker	Enable Docker input plugin
fluentbit_input_plugins_docker_events	Enable Docker events input plugin
fluentbit_input_plugins_dummy	Enable Dummy input plugin
fluentbit_input_plugins_emitter	Enable emitter input plugin
fluentbit_input_plugins_exec	Enable Exec input plugin
fluentbit_input_plugins_forward	Enable Forward input plugin
fluentbit_input_plugins_head	Enable Head input plugin
fluentbit_input_plugins_health	Enable Health input plugin
fluentbit_input_plugins_http	Enable HTTP input plugin
fluentbit_input_plugins_kmsg	Enable Kernel log input plugin
fluentbit_input_plugins_lib	Enable library mode input plugin
fluentbit_input_plugins_mem	Enable Memory input plugin
fluentbit_input_plugins_mqtt	Enable MQTT Broker input plugin
fluentbit_input_plugins_netif	Enable NetworkIF input plugin
fluentbit_input_plugins_proc	Enable Process input plugin
fluentbit_input_plugins_random	Enable random input plugin
fluentbit_input_plugins_serial	Enable Serial input plugin
fluentbit_input_plugins_statsd	Enable StatsD input plugin
fluentbit_input_plugins_stdin	Enable Standard input plugin
fluentbit_input_plugins_storage_backlog	Enable storage backlog input plugin
fluentbit_input_plugins_syslog	Enable Syslog input plugin
fluentbit_input_plugins_systemd	Enable Systemd input plugin
fluentbit_input_plugins_tail	Enable Tail input plugin
fluentbit_input_plugins_tcp	Enable TCP input plugin
fluentbit_input_plugins_thermal	Enable Thermal plugin
fluentbit_input_plugins_winlog	Enable Windows Log input plugin
fluentbit_output_plugins_azure	Enable Azure output plugin
fluentbit_output_plugins_azure_blob	Enable Azure output plugin
fluentbit_output_plugins_bigquery	Enable BigQuery output plugin
fluentbit_output_plugins_cloudwatch_logs	Enable AWS CloudWatch output plugin
fluentbit_output_plugins_counter	Enable Counter output plugin
fluentbit_output_plugins_datadog	Enable DataDog output plugin
fluentbit_output_plugins_es	Enable Elasticsearch output plugin
fluentbit_output_plugins_exit	Enable Exit output plugin
fluentbit_output_plugins_file	Enable file output plugin
fluentbit_output_plugins_flowcounter	Enable flowcount output plugin
fluentbit_output_plugins_forward	Enable Forward output plugin
fluentbit_output_plugins_gelf	Enable GELF output plugin
fluentbit_output_plugins_http	Enable HTTP output plugin
fluentbit_output_plugins_influxdb	Enable InfluxDB output plugin
fluentbit_output_plugins_kafka	Enable Kafka output plugin
fluentbit_output_plugins_kafka_rest	Enable Kafka Rest output plugin
fluentbit_output_plugins_kinesis_firehose	Enable AWS Firehose output plugin
fluentbit_output_plugins_lib	Enable library mode output plugin
fluentbit_output_plugins_logdna	Enable LogDNA output plugin
fluentbit_output_plugins_loki	Enable Loki output plugin
fluentbit_output_plugins_nats	Enable NATS output plugin
fluentbit_output_plugins_nrlogs	Enable New Relic output plugin
fluentbit_output_plugins_null	Enable dev null output plugin
fluentbit_output_plugins_pgsql	Enable PostgreSQL output plugin
fluentbit_output_plugins_plot	Enable Plot output plugin
fluentbit_output_plugins_retry	Enable Retry test output plugin
fluentbit_output_plugins_s3	Enable AWS S3 output plugin
fluentbit_output_plugins_slack	Enable Slack output plugin
fluentbit_output_plugins_splunk	Enable Splunk output plugin
fluentbit_output_plugins_stackdriver	Enable Stackdriver output plugin
fluentbit_output_plugins_stdout	Enable STDOUT output plugin
fluentbit_output_plugins_syslog	Enable Syslog output plugin
fluentbit_output_plugins_tcp	Enable TCP output plugin
fluentbit_output_plugins_td	Enable Treasure Data output plugin
jemalloc	Use Jemalloc as default memory allocator
loki	Apply json_loki support path for HTTP output plugin (https://github.com/fluent/fluent-bit/pull/1853)
luajit	Enable Lua scripting support
tls	Buils with SSL/TLS support

keepassxc

Flag	Description
browser
network
ssh-agent

loki

Flag	Description
fluent-bit	Build the fluent-bit plugin to publish from <pkg>app-admin/fluent-bit</pkg>
promtail	Build the promtail log gathering agent

app-arch

file-roller

Flag	Description
nautilus	Build contextual menu extension for <pkg>gnome-base/nautilus</pkg>.

app-office

freeoffice

Flag	Description
pax_kernel	Triggers a paxmarking of the binary

dev-db

immudb

Flag	Description
webconsole	Enables the internal webserver, defaults to: http://localhost:8080

dev-lang

lazarus

Flag	Description
gtk2

php

Flag	Description
acl
apache2
argon2
bcmath
berkdb
bzip2
calendar
cdb
cgi
cjk
cli
crypt
ctype
embed
enchant
exif
ffi
fileinfo
filter
firebird
flatfile
fpm
ftp
gd
gdbm
gmp
hash
iconv
imap
inifile
intl
iodbc
ipv6
jit
json
kerberos
ldap-sasl
libedit
lmdb
mhash
mssql
mysql
mysqli
nls
oci8-instant-c
oci8-instant-clie
oci8-instant-client
odbc
opcache
pcntl
pdo
phar
phpdbg
posix
postgres
qdbm
readline
recode
session
session-mm
sharedmem
simplexml
snmp
soap
sockets
sodium
sqlite
sybase-ct
sysvipc
tidy
tokenizer
tokyocabinet
unicode
wddx
xmlreader
xmlrpc
xmlwriter
xpm
xslt
zip
zlib

dev-libs

objfw

Flag	Description
llvm

dev-python

matrix-nio

Flag	Description
e2e

dev-util

flutter

Flag	Description
android

games-util

mangohud

Flag	Description
xnvctrl

gnome-base

gnome-shell

Flag	Description
ibus	Enable support for enhanced input methods through <pkg>app-i18n/ibus</pkg>
networkmanager

mail-client

evolution

Flag	Description
bogofilter	Build <pkg>mail-filter/bogofilter</pkg> plugin
geolocation	Enable support for displaying contacts on a map inside evolution using <pkg>media-libs/libchamplain</pkg>
highlight	Enable text highlighting plugin
sound	Enable sound notifications using <pkg>media-libs/libcanberra-gtk3</pkg>
spamassassin	Build <pkg>mail-filter/spamassassin</pkg> plugin
weather	Enable optional weather calendar support
ytnef	Enable optional TNEF attachments parser support using <pkg>net-mail/ytnef</pkg>

media-gfx

brother-scan4-bin

Flag	Description
avahi	Enable this, if you want to find the scanner via avahi.
usb	Enable this, if you want to scan over usb connection.

media-video

vlc

Flag	Description
a52
aribsub	Enable support for decoding ARIB STD-B24 subtitles
bidi
bluray	Enable libbluray for Blu-ray disc support
cddb
chromaprint	Enable libchromaprint for Chromaprint based audio fingerprinter support
chromecast	Enable experimental support for Google Chromecast
cpu_flags_arm_neon
cpu_flags_ppc_altivec
cpu_flags_x86_mmx
cpu_flags_x86_sse
dav1d	Enable support for <pkg>media-libs/dav1d</pkg> AV1 decoder
dc1394	Enable IIDC cameras support
directx	Enable Win32 DirectX, D3D11va and DxVA2 support
dts
dvbpsi	Enable support for Mpeg-TS files (.ts, .m2ts, .mts) via <pkg>media-libs/libdvbpsi</pkg>
dvd
encode	Enable streaming-output support and videolan manager to control multiple streams from within one instance
faad	Enable AAC audio decoding library support via <pkg>media-libs/faad2</pkg>
fdk	Enable the Fraunhofer AAC codec library
flac
fluidsynth	Enable Fluidsynth MIDI software synthesis (with external sound fonts)
fontconfig
gcrypt	Enable cryptography support via libgcrypt
gme	Enable support for <pkg>media-libs/game-music-emu</pkg> for playing various video game music formats
ieee1394
kate	Adds support for Ogg Kate subtitles via libkate
kms	Enable kernel mode setting video output plugin via <pkg>x11-libs/libdrm</pkg>
libass
libcaca
libplacebo	Enable support for GPU accelerated video rendering with <pkg>media-libs/libplacebo</pkg>
libsamplerate
libtar	Uses libtar instead of the built-in tar reader for reading custom skins
libtiger	Enable Ogg Kate subtitles rendering using libtiger
linsys	Enable support for Linux Linear Systems Ltd. SDI and HD-SDI input cards
lirc
live	Enable live555 streaming media support (client support for rtsp)
loudness	Enable loudness normalisation according to the EBU R128 standard using <pkg>media-libs/libebur128</pkg>
lua	Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things
macosx-notifications	Enable Mac OS X notifications module (formerly growl)
mad
matroska	Enable matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)
modplug
mp3
mpeg	Add libmpeg2 support for mpeg-1 and mpeg-2 video streams
mtp
musepack
ncurses
nfs	Enable support for nfs protocol via <pkg>net-fs/libnfs</pkg>
ogg
omxil	Enable OpenMAX Integration Layer codec module
optimisememory	Enable optimisation for memory rather than performance
projectm	Enable the projectM visualization plugin
run-as-root	Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it!
samba
sdl-image	Enable sdl image video decoder (depends on sdl)
sftp	Enable libssh2 to support SFTP file transfer
shout	Enable libshout output
sid
skins	Enable support for the skins2 interface
soxr	Enable SoX Resampler support via <pkg>media-libs/soxr</pkg>
speex
srt	Enable support for Secure Reliable Transport (SRT) via <pkg>net-libs/srt</pkg>
svg
taglib
theora
tremor	Enable tremor, a fixed-point version of the Ogg Vorbis decoder
twolame	Enable twolame support (MPEG Audio Layer 2 encoder)
upnp	Enable support for the Intel SDK stack based UPnP discovery module instead of CyberLink
vaapi
vdpau
vnc
x264
x265	Support X265 Encoder
zeroconf	Enable support for zero-configuration networking via avahi
zvbi	Enable support for teletext subtitles via the zvbi library

net-im

matrix-authentication-service

Flag	Description
frontend
policies

net-misc

netbsd-mopd

Flag	Description
ultrix

net-print

cnijfilter

Flag	Description
net

cnijfilter-drivers

Flag	Description
(
)
e600
ip100
mx370
mx430
mx510
mx710
mx890

net-voip

baresip

Flag	Description
aac
acip	Audio Contribution over IP compatibility module
amr	Enables Adaptive Multi-Rate Audio support
aptx	Audio Processing Technology codec (aptX)
console	UDP/TCP console UI driver
echo	Echo server module
evdev	Input event device UI module
gtk3	GTK+ 3 menu-based UI
httpd	HTTP webserver UI-module
httpreq	HTTP request module
mpa	MPA Speech and Audio Codec
mqtt	Enable mqtt support via <pkg>app-misc/mosquitto</pkg>
portaudio
sdl	Video ouptput driver via <pkg>media-libs/libsdl2</pkg>
serreg	Serial registration module
snapshot	Save video-stream as PNG images
sndfile	Audio dumper using libsndfile
spandsp	G.722 and G.726 audio codecs via <pkg>media-libs/spandsp</pkg>
syslog
tcpcontrol	TCP control interface using JSON payload
video	Build vidbridge and vidinfo modules.
webrtc	Use <pkg>media-plugins/gst-plugins-webrtc</pkg> for webrtc support

linphone-desktop

Flag	Description
av1
daemon

sci-libs

hipBLAS

Flag	Description
rocsolver	Add additional functions from <pkg>sci-libs/rocSOLVER</pkg>

rocBLAS

Flag	Description
benchmark	Build and install rocblas-bench
hipblaslt	Build with <pkg>sci-libs/hipBLASLt</pkg> for some non-batched and strided batched problems on gfx12
roctracer	Enable roctracer (roctx) marker

sci-ml

caffe2-rocm

Flag	Description
nccl

llama-cpp

Flag	Description
openssl

ollama

Flag	Description
video_cards_amdgpu

stable-diffusion-cpp

Flag	Description
webm

torchaudio-rocm

Flag	Description
sox

sys-fs

advfs-fuse

Flag	Description
fuse

sys-power

asusctl

Flag	Description
acpi
gfx	Adds support for <pkg>sys-power/supergfxctl</pkg>
notify	Installs asusctl notify executable and service

corectrl

Flag	Description
pcinames

x11-wm

mutter

Flag	Description
bash-completion
input_devices_wacom
libdisplay	Enable EDID and DisplayID using <pkg>media-libs/libdisplay-info</pkg>
screencast
sysprof	Enable profiling data capture support using <pkg>dev-util/sysprof-capture</pkg>
xwayland	Enable X11 application support in Wayland sessions

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