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\/etc\/portage\/savedconfig ${CATEGORY}\/${PN}. Make sure your USE flags allow for appropriate dependencies","isdefault":false,"use":"savedconfig"},{"description":"Add support for scanner hardware (e.g. build the sane frontend in kdegraphics)","isdefault":false,"use":"scanner"},{"description":"Enable support for remote desktop and screen cast using PipeWire","isdefault":false,"use":"screencast"},{"description":"Support for Stream Control Transmission Protocol","isdefault":false,"use":"sctp"},{"description":"Add support for Simple Direct Layer (media library)","isdefault":false,"use":"sdl"},{"description":"Enable seccomp (secure computing mode) to perform system call filtering at runtime to increase security of programs","isdefault":false,"use":"seccomp"},{"description":"Automatically sign efi executables using user specified key","isdefault":false,"use":"secureboot"},{"description":"!!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur","isdefault":false,"use":"selinux"},{"description":"Cross-KDE support for semantic search and information retrieval","isdefault":false,"use":"semantic-desktop"},{"description":"Add persistent session support","isdefault":false,"use":"session"},{"description":"Enable SID (Commodore 64 audio) file support","isdefault":false,"use":"sid"},{"description":"Enable S\/Key (Single use password) authentication support","isdefault":false,"use":"skey"},{"description":"Add support for the slang text display library (it's like ncurses, but different)","isdefault":false,"use":"slang"},{"description":"Enable smartcard support","isdefault":false,"use":"smartcard"},{"description":"Enable support for multiprocessors or multicore systems","isdefault":false,"use":"smp"},{"description":"Enable support for Snappy compression (as implemented in app-arch\/snappy)","isdefault":false,"use":"snappy"},{"description":"Add support for libsndfile","isdefault":false,"use":"sndfile"},{"description":"Add support for the Simple Network Management Protocol if available","isdefault":false,"use":"snmp"},{"description":"Add support for SOAP (Simple Object Access Protocol)","isdefault":false,"use":"soap"},{"description":"Add support for tcp\/ip sockets","isdefault":false,"use":"sockets"},{"description":"Add support for the socks5 proxy","isdefault":false,"use":"socks5"},{"description":"Enable sound support","isdefault":false,"use":"sound"},{"description":"Zip the sources and install them","isdefault":false,"use":"source"},{"description":"Add support for Sound eXchange (SoX)","isdefault":false,"use":"sox"},{"description":"Enable text-to-speech support","isdefault":false,"use":"speech"},{"description":"Add support for the speex audio codec (used for speech)","isdefault":false,"use":"speex"},{"description":"Add dictionary support","isdefault":false,"use":"spell"},{"description":"Enable behavior to support maintaining \/bin, \/lib*, \/sbin and \/usr\/sbin  separately from \/usr\/bin and \/usr\/lib*","isdefault":false,"use":"split-usr"},{"description":"Add support for sqlite - embedded sql database","isdefault":false,"use":"sqlite"},{"description":"Add support for SSL\/TLS connections (Secure Socket Layer \/ Transport Layer Security)","isdefault":false,"use":"ssl"},{"description":"Enable application startup event feedback mechanism","isdefault":false,"use":"startup-notification"},{"description":"!!do not set this during bootstrap!! Causes binaries to be statically linked instead of dynamically","isdefault":false,"use":"static"},{"description":"Build static versions of dynamic libraries as well","isdefault":false,"use":"static-libs"},{"description":"Allow symbol stripping to be performed by the ebuild for special files","isdefault":false,"use":"strip"},{"description":"Enable subversion (version control system) support","isdefault":false,"use":"subversion"},{"description":"Enable setuid root program(s)","isdefault":false,"use":"suid"},{"description":"Add support for SVG (Scalable Vector Graphics)","isdefault":false,"use":"svg"},{"description":"Add support for SVGAlib (graphics library)","isdefault":false,"use":"svga"},{"description":"Force kernel ebuilds to automatically update the \/usr\/src\/linux symlink","isdefault":false,"use":"symlink"},{"description":"Enable support for syslog","isdefault":false,"use":"syslog"},{"description":"Enable use of systemd-specific libraries and features like socket activation or session tracking","isdefault":false,"use":"systemd"},{"description":"Use the szip compression library","isdefault":false,"use":"szip"},{"description":"Enable tagging support with taglib","isdefault":false,"use":"taglib"},{"description":"Add support the Tcl language","isdefault":false,"use":"tcl"},{"description":"Use the dev-util\/google-perftools libraries to replace the malloc() implementation with a possibly faster one","isdefault":false,"use":"tcmalloc"},{"description":"Add support for TCP wrappers","isdefault":false,"use":"tcpd"},{"description":"Send anonymized usage information to upstream so they can better understand our users","isdefault":false,"use":"telemetry"},{"description":"Enable dependencies and\/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)","isdefault":false,"use":"test"},{"description":"Install testsuite for manual execution by the user","isdefault":false,"use":"test-install"},{"description":"Enable important test dependencies that require Rust toolchain","isdefault":false,"use":"test-rust"},{"description":"Add support for the Theora Video Compression Codec","isdefault":false,"use":"theora"},{"description":"Add threads support for various packages. Usually pthreads","isdefault":false,"use":"threads"},{"description":"Add support for HTML Tidy","isdefault":false,"use":"tidy"},{"description":"Add support for the TIFF image format","isdefault":false,"use":"tiff"},{"description":"Use 64-bit time_t type instead of the regular 32-bit type. This flag is forced on time64 profiles, and masked elsewhere. It should be only used when detection of type width is not possible (e.g. for SRC_URI)","isdefault":false,"use":"time64"},{"description":"Build with Timidity++ (MIDI sequencer) support","isdefault":false,"use":"timidity"},{"description":"Add support for Tk GUI toolkit","isdefault":false,"use":"tk"},{"description":"Add support for FreeType and\/or FreeType2 fonts","isdefault":false,"use":"truetype"},{"description":"Install TrueType font versions","isdefault":false,"use":"ttf"},{"description":"Enable virtual\/udev integration (device discovery, power and storage device support, etc)","isdefault":false,"use":"udev"},{"description":"Enable storage management support (automounting, volume monitoring, etc)","isdefault":false,"use":"udisks"},{"description":"Enable support for the Unified Extensible Firmware Interface","isdefault":false,"use":"uefi"},{"description":"Add support for Unicode","isdefault":false,"use":"unicode"},{"description":"Add support for call stack unwinding and function name resolution","isdefault":false,"use":"unwind"},{"description":"Enable UPnP port mapping support","isdefault":false,"use":"upnp"},{"description":"Enable UPnP audio\/video streaming support","isdefault":false,"use":"upnp-av"},{"description":"Enable power management support","isdefault":false,"use":"upower"},{"description":"Add USB support to applications that have optional USB support (e.g. cups)","isdefault":false,"use":"usb"},{"description":"Enable support for video4linux (using linux-headers or userspace libv4l libraries)","isdefault":false,"use":"v4l"},{"description":"Enable Video Acceleration API for hardware decoding","isdefault":false,"use":"vaapi"},{"description":"Enable bindings for dev-lang\/vala","isdefault":false,"use":"vala"},{"description":"Enable annotations for accuracy. May slow down runtime slightly. Safe to use even if not currently using dev-debug\/valgrind","isdefault":false,"use":"valgrind"},{"description":"Do not add extra patches which change default behaviour; DO NOT USE THIS ON A GLOBAL SCALE as the severity of the meaning changes drastically","isdefault":false,"use":"vanilla"},{"description":"Video CD support","isdefault":false,"use":"vcd"},{"description":"Enable the Video Decode and Presentation API for Unix acceleration interface","isdefault":false,"use":"vdpau"},{"description":"Verify upstream signatures on distfiles","isdefault":false,"use":"verify-sig"},{"description":"Add support for installing web-based applications into a virtual-hosting environment","isdefault":false,"use":"vhosts"},{"description":"Install optional video files (used in some games)","isdefault":false,"use":"videos"},{"description":"Pulls in related vim syntax scripts","isdefault":false,"use":"vim-syntax"},{"description":"Enable VNC (remote desktop viewer) support","isdefault":false,"use":"vnc"},{"description":"Add support for the OggVorbis audio codec","isdefault":false,"use":"vorbis"},{"description":"Add support for VP8\/VP9 codecs (usually via media-libs\/libvpx)","isdefault":false,"use":"vpx"},{"description":"Add support for 3D graphics and computing via the Vulkan cross-platform API","isdefault":false,"use":"vulkan"},{"description":"Add support for wavpack audio compression tools","isdefault":false,"use":"wavpack"},{"description":"Enable dev-libs\/wayland backend","isdefault":false,"use":"wayland"},{"description":"Add support for the WebKit HTML rendering\/layout engine","isdefault":false,"use":"webkit"},{"description":"Add support for the WebP image format","isdefault":false,"use":"webp"},{"description":"Enable wireless network functions","isdefault":false,"use":"wifi"},{"description":"Add support for the Windows Metafile vector image format","isdefault":false,"use":"wmf"},{"description":"Add support for wxWidgets\/wxGTK GUI toolkit","isdefault":false,"use":"wxwidgets"},{"description":"Enable h264 encoding using x264","isdefault":false,"use":"x264"},{"description":"Add support for extended attributes (filesystem-stored metadata)","isdefault":false,"use":"xattr"},{"description":"Support the X C-language Binding, a replacement for Xlib","isdefault":false,"use":"xcb"},{"description":"Enable support for the Xorg composite extension","isdefault":false,"use":"xcomposite"},{"description":"Add support for XEmacs","isdefault":false,"use":"xemacs"},{"description":"Add xface support used to allow a small image of xface format to be included in an email via the header 'X-Face'","isdefault":false,"use":"xface"},{"description":"Build with support for XFT font renderer (x11-libs\/libXft)","isdefault":false,"use":"xft"},{"description":"Add support for the XINE movie libraries","isdefault":false,"use":"xine"},{"description":"Add support for querying multi-monitor screen geometry through the Xinerama API","isdefault":false,"use":"xinerama"},{"description":"Add support for the xinetd super-server","isdefault":false,"use":"xinetd"},{"description":"Add support for XML files","isdefault":false,"use":"xml"},{"description":"Support for xml-rpc library","isdefault":false,"use":"xmlrpc"},{"description":"Enable support for Extensible Metadata Platform (Adobe XMP)","isdefault":false,"use":"xmp"},{"description":"Enable support for Extensible Messaging and Presence Protocol (XMPP) formerly known as Jabber","isdefault":false,"use":"xmpp"},{"description":"Sends display using the X On Screen Display library","isdefault":false,"use":"xosd"},{"description":"Add support for XPM graphics format","isdefault":false,"use":"xpm"},{"description":"Add support for XScreenSaver extension","isdefault":false,"use":"xscreensaver"},{"description":"Add in optional support for the Xvideo extension (an X API for video playback)","isdefault":false,"use":"xv"},{"description":"Add support for xvid.org's open-source mpeg-4 codec","isdefault":false,"use":"xvid"},{"description":"Support for DNS Service Discovery (DNS-SD)","isdefault":false,"use":"zeroconf"},{"description":"Enable support for ZIP archives","isdefault":false,"use":"zip"},{"description":"Add support for zlib compression","isdefault":false,"use":"zlib"},{"description":"Enable zsh completion support","isdefault":false,"use":"zsh-completion"},{"description":"Enable support for ZSTD compression","isdefault":false,"use":"zstd"}]}