Global USE flags

Flag	Description	Packages
X		3
dbus		2
debug		3
doc		3
elibc_glibc		2
examples		2
test		25
tools	Build tools	2
wayland		2

Category USE flags

media-fonts

Flag	Description	Packages
otf		2

Local USE flags

app-alternatives

unzip

Flag	Description
info-zip	Symlink to Info-ZIP unzip (<pkg>app-arch/unzip</pkg>)
libarchive	Symlink to bsdunzip from <pkg>app-arch/libarchive</pkg>

app-arch

unzip

Flag	Description
bzip2
natspec	Use <pkg>dev-libs/libnatspec</pkg> to correctly decode non-ascii file names archived in Windows.
unicode

app-containers

waydroid

Flag	Description
nftables	Add support for net-firewall/nftables

app-misc

parona-scripts

Flag	Description
efibootmgr	Install installkernel hook for efibootmgr
perl	Install perl scripts
portage-hooks	Install portage hooks

dev-build

cargo-make

Flag	Description
openssl	Enable TLS support with <pkg>dev-libs/openssl</pkg>
rustls	Enable TLS support with rustls

dev-cpp

ogdf

Flag	Description
cgal	Build components that require <pkg>sci-mathematics/cgal</pkg>
cpu_flags_x86_sse3

dev-libs

aws-lc

Flag	Description
rust	Generate Rust bindings

vala-language-server

Flag	Description
gnome	Build GNOME Builder plugin
man

dev-util

umr

Flag	Description
gui
test-install

dev-vcs

gcli

Flag	Description
libedit
lowdown	Use lowdown to render markdown.

git-credential-email

Flag	Description
protonmail	Install credential helper for Proton Mail

games-util

mangohud

Flag	Description
mangoapp	Install mangoapp, a transparent background application with a built in mangohud.
plots	Install mangoplot plotting script which generates a 1D heatmap of a log files framerates.

gnome-extra

yad

Flag	Description
appindicator
sourceview	Enable syntax highlighting in text-info dialog with <pkg>x11-libs/gtksourceview</pkg>:3.0
spell	Enable support spell checking in text fields
webkit

media-sound

spotify

Flag	Description
local-playback	Allows playing local files with the Spotify client
pax-kernel	Triggers a paxmarking of the main Spotify binary

sci-ml

whispercpp

Flag	Description
ffmpeg
sdl

sys-apps

coolercontrold

Flag	Description
liquidctl	Support for interacting with AIO liquid coolers and other devices with <pkg>app-misc/liquidctl</pkg>

sys-kernel

xanmod-kernel

Flag	Description
initramfs	Build initramfs along with the kernel.

virtual

linux-sources

Flag	Description
firmware	Install linux kernel firmware

www-client

icecat

Flag	Description
clang	Use Clang compiler instead of GCC
gnome-shell	Integrate with gnome-base/gnome-shell search
hardened
hwaccel	Force-enable hardware-accelerated rendering (Mozilla bug 594876)
jack
jumbo-build	Enable unified build - combines source files to speed up build process, but requires more memory
libproxy	Enable libproxy support
llvm_slot_21
openh264	Use <pkg>media-libs/openh264</pkg> for H.264 support instead of downloading binary blob from Mozilla at runtime
pgo	Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.
pulseaudio
selinux
sndio	Enable support for the <pkg>media-sound/sndio</pkg> backend
system-av1	Use the system-wide <pkg>media-libs/dav1d</pkg> and <pkg>media-libs/libaom</pkg> library instead of bundled.
system-harfbuzz	Use the system-wide <pkg>media-libs/harfbuzz</pkg> and <pkg>media-gfx/graphite2</pkg> instead of bundled.
system-icu	Use the system-wide <pkg>dev-libs/icu</pkg> instead of bundled.
system-jpeg	Use the system-wide <pkg>media-libs/libjpeg-turbo</pkg> instead of bundled.
system-libevent	Use the system-wide <pkg>dev-libs/libevent</pkg> instead of bundled.
system-libvpx	Use the system-wide <pkg>media-libs/libvpx</pkg> instead of bundled.
system-pipewire	Use system <pkg>media-video/pipewire</pkg> for WebRTC and screencast instead of bundled one
system-png	Use the system-wide <pkg>media-libs/libpng</pkg> instead of bundled (requires APNG patches)
system-webp	Use the system-wide <pkg>media-libs/libwebp</pkg> instead of bundled.
wasm-sandbox	Sandbox certain third-party libraries through WebAssembly using RLBox
wifi

---