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USE flags

• abi_mips_n32 - 64-bit (32-bit pointer) libraries
• abi_mips_n64 - 64-bit libraries
• abi_mips_o32 - 32-bit libraries
• abi_s390_32 - 32-bit (s390) libraries
• abi_s390_64 - 64-bit (s390x) libraries
• abi_x86_32 - 32-bit (x86) libraries
• abi_x86_64 - 64-bit (amd64) libraries
• abi_x86_x32 - x32 ABI libraries
• dbus - Enable dbus support for anything that needs it (gpsd, gnomemeeting, etc)
• graphicsmagick - Build and link against GraphicsMagick instead of ImageMagick (requires USE=imagemagick if optional)
• gtk - Add support for x11-libs/gtk+ (The GIMP Toolkit)
• imagemagick - Enable optional support for the ImageMagick or GraphicsMagick image converter
• introspection - Add support for GObject based introspection
• java - Add support for Java
• jpeg - Add JPEG image support
• nls - Add Native Language Support (using gettext - GNU locale utilities)
• python - Add optional support/bindings for the Python language
• python_single_target_python3_10 - Build for Python 3.10 only
• python_single_target_python3_11 - Build for Python 3.11 only
• python_single_target_python3_9 - Build for Python 3.9 only
• qt5 - Add support for the Qt 5 application and UI framework
• static-libs - Build static versions of dynamic libraries as well
• test - Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)
• threads - Add threads support for various packages. Usually pthreads
• v4l - Enable support for video4linux (using linux-headers or userspace libv4l libraries)
• X - Add support for X11
• xv - Add in optional support for the Xvideo extension (an X API for video playback)