Global USE flags

Flag	Description	Packages
"(		2
(		2
)		2
)"		2
X		7
abi_x86_32		4
alsa		4
big-endian		2
clang	support for <pkg>llvm-core/clang</pkg> assisted parsing	2
cpu_flags_x86_avx512f		2
cpu_flags_x86_sse2		2
cups		7
custom-cflags	Keep -march, -mtune and -mcpu from CFLAGS (unsupported, known to break some components)	4
d3d9	Enable support for DirectX 9 (d3d9.dll)	2
dbus		3
debug	Build with debug extensions enabled.	17
doc		11
elibc_llvm	ELIBC setting for systems that use LLVM's libc	12
examples		4
gtk4	Build with GTK4 headers.	2
gui	Install desktop entries, icons, and GUI launcher	4
hip	Build HIP runtime	3
kerberos		2
llvm	Build with LLVM backend and extensions enabled.	2
official	Enable Chromium official build optimisations	2
opencl	Enable the Rusticl Gallium OpenCL state tracker.	5
opengl		3
openmp		3
pax-kernel	Allow building on a PaX-enabled kernel	2
proprietary-codecs	Enable proprietary codecs like H.264 and AAC in the bundled ffmpeg	3
pulseaudio	Add sound server support via media-libs/libpulse (may be PulseAudio or Pipewire, or apulse if installed)	4
python	Enable PyGhidra Python 3 integration, interactive interpreter, and stubs	3
qt6	Build and install the qrenderdoc GUI	4
screencast	Enable screen capture via PipeWire on Wayland	2
sdl		3
selinux		6
static-libs		3
strip		4
system-bootstrap	Bootstrap using installed openjdk	2
system-harfbuzz	Use the system copy of media-libs/harfbuzz	3
system-zstd	Use the system copy of app-arch/zstd	2
test	Perform rocblas-test to compare the result between rocBLAS and system BLAS.	31
tools	Build various low-level parsers	2
truetype		2
udev		2
vaapi	Enable hardware video acceleration via VA-API	3
valgrind		4
video_cards_		2
video_cards_nvidia	Build for Nvidia platform	3
vulkan	Enable Vulkan graphics support	8
wayland	Build the Wayland windowing support needed to capture Wayland clients. Upstream considers this experimental and unsupported; the qrenderdoc GUI itself still runs on the xcb Qt platform unless QT_QPA_PLATFORM says otherwise.	7
zstd		2

Category USE flags

app-emulation

Flag	Description	Packages
crossdev-mingw	Use <pkg>sys-devel/crossdev</pkg> for the toolchain rather than <pkg>dev-util/mingw64-toolchain</pkg> (requires manual setting up and is mostly unsupported, try disabling if have issues)	3
d3d8	Enable support for DirectX 8 (d3d8.dll)	2

dev-java

Flag	Description	Packages
headless-awt	Don't install the X backend for AWT, needed by some GUIs	3
source	Install JVM sources	2

games-emulation

Flag	Description	Packages
cubeb	Enables the cubeb audio backend	2
discord	Enable rich Discord presence	2

sci-libs

Flag	Description	Packages
benchmark	Build benchmark clients	4
roctracer	Enable ROCm tracing support	2

sci-misc

Flag	Description	Packages
blis	Build a BLIS backend	2
cuda		2
openblas	Build an OpenBLAS backend	2

www-client

Flag	Description	Packages
pgo	Build with Profile Guided Optimizations (2-stage compilation)	2
system-icu	Use system <pkg>dev-libs/icu</pkg> instead of the bundled one	2

Local USE flags

app-editors

zed

Flag	Description
amd64
collab	Build the real-time calling and screen sharing support, which needs <pkg>net-libs/libwebrtc</pkg>

app-emulation

dxvk

Flag	Description
d3d10	Enable support for DirectX 10 (d3d10.dll)
d3d11	Enable support for DirectX 11 (d3d11.dll)
dxgi	Enable support for the DirectX Graphics Infrastructure (dxgi.dll)

proton-ge-custom

Flag	Description
ffmpeg
fontconfig
pcap
ssl
usb
v4l
xinerama

vkd3d-proton

Flag	Description
extras	Install extra tools and demos in /usr/lib/vkd3d-proton

app-office

libreoffice

Flag	Description
$(printf
${LO_EXTS})
'
'libreoffice_extensions_%s
accessibility
base
bluetooth
branding
coinmp
eds
googledrive
gstreamer
gtk3
java
kde
ldap
mariadb
odk
pdfimport
postgres

libreoffice-l10n

Flag	Description
l10n_
offlinehelp	Install help files locally instead of using the LibreOffice Wiki

app-text

doxygen

Flag	Description
dot	allow to create dot graphs using <pkg>media-gfx/graphviz</pkg>
doxysearch	build doxyindexer and doxysearch.cgi

dev-java

openjdk

Flag	Description
javafx	Import OpenJFX modules at build time, via <pkg>dev-java/openjfx</pkg>
jbootstrap	Build OpenJDK twice, the second time using the result of the first
systemtap	Enable SystemTap/DTrace tracing

dev-lang

rust

Flag	Description
${ALL_LLVM_TARGETS[*]}
AArch64
AMDGPU
ARC
ARM
AVR
BPF
CSKY
DirectX
Hexagon
Lanai
LoongArch
M68k
MSP430
Mips
NVPTX
PowerPC
RISCV
SPIRV
Sparc
SystemZ
VE
WebAssembly
X86
XCore
Xtensa
bpf
clippy	Install clippy, Rust code linter
dist	Install dist tarballs (used for bootstrapping)
llvm-libunwind
llvm_targets_BPF
llvm_targets_WebAssembly
lto
miri	Install miri, an interpreter for Rust's mid-level intermediate representation (requires USE=nightly, sometimes is broken)
mrustc-bootstrap	Use <pkg>dev-lang/mrustc</pkg> to build the bootstrap Rust sysroot from this package's source
nightly	Enable nightly (UNSTABLE) features (NOTE: it does not install nightly version, just enables features marked as nightly at time of release)
parallel-compiler	Build a multi-threaded rustc (experimental, not tested by upstream)
rust-analyzer	Install rust-analyzer, A Rust compiler front-end for IDEs (language server)
rust-src	Install rust-src, needed by developer tools and for build-std (cross)
rustc-dev	Install compiler development libraries for rustc_private consumers
rustfmt	Install rustfmt, Rust code formatter
system-llvm	Use the system LLVM installation
wasm	Build support for the wasm32-unknown-unknown target

dev-libs

liborcus

Flag	Description
spreadsheet-model	Enable the spreadsheet model implementation

xrt

Flag	Description
npu

dev-python

dnspython

Flag	Description
dnssec	Use <pkg>dev-python/cryptography</pkg> to enable low-level DNSSEC RSA, DSA, ECDSA and EdDSA signature validation.
https	Enable DNS-over-HTTPS.
quic	Enable DNS-over-QUIC.

dev-qt

qttools

Flag	Description
assistant	Build Qt Assistant and the QtHelp module
designer	Build Qt Designer
distancefieldgenerator	Build Qt Distance Field Generator
gles2-only
kmap2qmap	Build tool to generate keymaps for use on Embedded Linux
linguist	Build Qt Linguist tools (GUI requires USE=widgets and USE=qml)
pixeltool	Build Qt Pixeltool
qdbus	Build the Qt D-Bus Interface (D-Bus Viewer requires USE=widgets)
qdoc	Build Qt Documentation Generator
qml	Build QML/QtQuick bindings and imports
qmlls	Build the QtHelp plugin for the QML language server
qtattributionsscanner	Build Qt Source Code Attribution Scanner
qtdiag	Build Qt Diag
qtplugininfo	Build Qt Plugin Info
widgets	Enable QtWidgets support

dev-util

Tensile

Flag	Description
client	Build and install tensile_client executable to run benchmarks and tune GPU GEMM

claude-code

Flag	Description
cpu_flags_x86_avx
cpu_flags_x86_avx2

codex

Flag	Description
code-mode	Build codex-code-mode-host, which embeds V8. Upstream ships V8 as a library already built against musl rather than as source, so it needs what that was linked against

ghidra

Flag	Description
${PYTHON_REQUIRED_USE}
bsim	Enable BSim function similarity and duplicate code search engine (requires PostgreSQL support)
debugger	Enable dynamic analysis and debugger subsystem (GDB, LLDB, DAP, trace modeling)
eclipse	Package Eclipse plugins (GhidraDev, GhidraSleighEditor)
fidb	Download and install Function ID signature databases for standard library recognition
ida	Install IDA Pro loader and export plugins
jython	Install Jython 2.7 legacy scripting extension
lisa	Install LiSA (Library for Static Analysis) abstract interpretation engine
machine-learning	Install Machine Learning function detection plugin
sarif	Enable SARIF (Static Analysis Results Interchange Format) support
server	Install GhidraServer multi-user collaboration daemon
z3	Enable SymbolicSummaryZ3 symbolic execution extension using Z3 SMT solver

hip

Flag	Description
video_cards_amdgpu	Build for AMD platform

llvm-mingw64

Flag	Description
arm64-pe	Enable the aarch64-w64-mingw32 target
arm64ec-pe	Enable the arm64ec-w64-mingw32 target
bin-symlinks	Install the cross tools into /usr/bin, where a build system looking for <pkg>sys-devel/gcc</pkg> by its cross name finds them
i686-pe	Enable the i686-w64-mingw32 target
x86-64-pe	Enable the x86_64-w64-mingw32 target

qwen-code

Flag	Description
opentui	Build the OpenTUI renderer with <pkg>dev-util/opentui</pkg> and make it the default

games-emulation

yuzu

Flag	Description
compatibility-list	Downloads the latest compatibility list
qt5
system-vulkan	Use system dev-util/vulkan-headers
webengine	Use QtWebEngine for web applet implementation
webservice	Enable web services (telemetry, etc.)

games-fps

q2rtx

Flag	Description
dlss
fsr
xess

games-util

heroic

Flag	Description
gamescope	Install a desktop entry that runs Heroic inside gui-wm/gamescope

llvm-runtimes

libclc

Flag	Description
spirv	Build SPIRV targets
video_cards_radeonsi

media-fonts

liberation-fonts

Flag	Description
fontforge	Use <pkg>media-gfx/fontforge</pkg> to build fonts from source

media-libs

harfbuzz

Flag	Description
cairo
experimental	Enable experimental APIs
glib	Enable <pkg>dev-libs/glib</pkg> unicode functions
graphite	Enable <pkg>media-gfx/graphite2</pkg> complementary shaper
icu
introspection

mesa

Flag	Description
gles1	Enable GLESv1 support.
lm-sensors	Enable Gallium HUD lm-sensors support.
osmesa	Build the Mesa library for off-screen rendering.
sysprof
unwind
vdpau	Enable the VDPAU acceleration interface for the Gallium3D Video Layer.
video_cards_nouveau
vulkan-overlay	Build vulkan-overlay-layer which displays Frames Per Second and other statistics
xa	Enable the XA (X Acceleration) API for Gallium3D.
zink	Enable the Zink OpenGL-over-Vulkan Gallium driver

vkBasalt

Flag	Description
reshade-shaders	Use Reshade Fx shaders

net-im

discord

Flag	Description
appindicator	Enable tray icon support via dev-libs/libayatana-appindicator
bundled-electron	Use the Electron bundled by upstream instead of dev-util/electron
seccomp	Enable the seccomp sandbox

sci-libs

rocBLAS

Flag	Description
hipblaslt	Build with hipBLASLt for some non-batched and strided batched problems on gfx12.

rocFFT

Flag	Description
perfscripts	Install benchmark performance scripts

sci-misc

llama-cpp

Flag	Description
curl
webui	Build the web UI served by llama-server, which needs Node and the sharp image library
xdna	Build the external AMD Ryzen AI XDNA1 NPU backend plugin

stable-diffusion-cpp

Flag	Description
amx_bf16
amx_int8
amx_tile
avx
avx2
avx512_bf16
avx512_vnni
avx512f
avx512vbmi
avx_vnni
bmi2
f16c
flexiblas	Build a FlexiBLAS backend
fma3
sse4_2
webm	Support the webm audiovisual media file format
webp

sys-apps

keyutils

Flag	Description
static

sys-boot

gnu-efi

Flag	Description
abi_x86_64

www-client

chromium

Flag	Description
bindist
bundled-toolchain	Download and use the upstream binary toolchain(s) to build Chromium
cpu_flags_ppc_vsx3
ffmpeg-chromium	(binpkg only) Use Chromium FFmpeg fork (<pkg>media-video/ffmpeg-chromium</pkg>) rather than mainline FFmpeg (<pkg>media-video/ffmpeg</pkg>)
hangouts	Enable support for Google Hangouts features such as screen sharing
headless	Build Ozone only with headless backend, NOT RECOMMENDED for general use.
rar	Enable the Safe Browsing feature to inspect RAR files.
widevine	Unsupported closed-source DRM capability (required by Netflix VOD)

firefox

Flag	Description
eme-free	Disable EME (DRM plugin) capability at build time
gmp-autoupdate	Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
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
openh264	Use <pkg>media-libs/openh264</pkg> for H264 support instead of downloading binary blob from Mozilla at runtime
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-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
telemetry
wasm-sandbox	Sandbox certain third-party libraries through WebAssembly using RLBox
wifi	Enable necko-wifi for NetworkManager integration, and access point MAC address scanning for better precision with opt-in geolocation services

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