Global USE flags

Flag	Description	Packages
debug		3
inotify	Use the Linux kernel inotify subsystem to notice changes to mpd music library	2
introspection		2
pipewire	Enable support for audio sink/source through native pipewire protocol	2
pulseaudio	Enable support for audio sink/source through pulseaudio modules	2
systemd	Enable support for systemd socket activation	3
test		3
wayland		3
zeroconf		2
zlib		2

Category USE flags

media-libs

Flag	Description	Packages
X		2

Local USE flags

app-emulation

proton-ge-custom-meta

Flag	Description
gnome
kde

wine-mono

Flag	Description
shared	Install pre-unpacked files which do not need to be copied into the Wine prefix

games-action

polymc

Flag	Description
lto	Enable link-time optimization
qt6	Build with Qt6 support instead of the default Qt5

games-util

gamemode

Flag	Description
elogind

gnome-base

gconf

Flag	Description
ldap	Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry."
policykit

media-libs

openvr

Flag	Description
static

openxr

Flag	Description
layers

wivrn

Flag	Description
gui
nvenc
vaapi
wireshark-plugins	Build the <pkg>net-analyzer/wireshark</pkg> plugin for the WiVRn protocol
x264

media-sound

mpd

Flag	Description
alsa
ao
audiofile
bzip2
cdio	Use libcdio for ISO9660 parsing support
chromaprint	Enable ChromaPrint / AcoustID support
cue	Enable CUE sheet support
curl	Support for web stream listening
dbus
doc
eventfd	Use the eventfd function in MPD's event loop
expat
faad	Use external faad library for AAC decoding
ffmpeg
fifo	Support writing audio to a FIFO
flac
fluidsynth	Enables Fluidsynth MIDI software synthesis (discouraged)
gme	Enables support for <pkg>media-libs/game-music-emu</pkg> for playing various video game music formats.
icu
id3tag	Support for ID3 tags
jack
lame	Support for MP3 streaming via Icecast2
libmpdclient	Enable support for remote mpd databases
libsamplerate
libsoxr	Enable the libsoxr resampler
mad
mikmod
mms
modplug
mpg123	Enable support for mp3 decoding over <pkg>media-sound/mpg123</pkg>
musepack
network	Enables network streaming support
nfs	Enable support for the Network File System
openal
openmpt	OpenMPT decoder plugin
opus
oss
pipe	Support writing audio to a pipe
qobuz	Build plugin to access qobuz
recorder	Enables output plugin for recording radio streams
samba
selinux
sid	Build with SID (Commodore 64 Audio) support
signalfd	Use the signalfd function in MPD's event loop
snapcast	Snapcast audio plugin
sndfile
sndio	Enable support for the <pkg>media-sound/sndio</pkg> backend
soundcloud	Build plugin to access soundcloud
sqlite
twolame	Support twolame MPEG-2 encoding
udisks
upnp
vorbis
wavpack
webdav	Enable using music from a WebDAV share
wildmidi	Enable MIDI support via wildmidi
zip

net-libs

ixwebsocket

Flag	Description
ssl
ws	Build the ws utility

net-misc

remmina

Flag	Description
appindicator
crypt
cups
examples
gvnc	Enable GVNC plugin using gtk-vnc, suitable for KVM and Vino servers
keyring
kwallet	Enable KDE Wallet plugin
nls
python
rdp
spice	Support connecting to SPICE-enabled virtual machines
ssh	Enable support for SSH/SFTP protocol
vnc
webkit

trackma

Flag	Description
cli
gtk
ncurses
qt5

sys-kernel

linux-firmware

Flag	Description
bindist
compress-xz	Compress firmware using xz (<pkg>app-arch/xz-utils</pkg>) before installation
compress-zstd	Compress firmware using zstd (<pkg>app-arch/zstd</pkg>) before installation
deduplicate	Create symlinks for all firmware that is duplicate using rdfind
dist-kernel
initramfs	Create and install initramfs for early microcode loading in /boot (only AMD for now)
redistributable	Install also non-free (but redistributable) firmware files
savedconfig	Allows individual selection of firmware files
unknown-license	Install firmware files whose license is unknown

---