Add support for X11

Packages describing “X” as local USE flag

Package “X” Flag Description
app-admin/gkrellm Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only
app-admin/pass Use x11-misc/xclip to copy passwords to the clipboard.
app-admin/lastpass-cli Use x11-misc/xclip or x11-misc/xsel to copy passwords to the clipboard.
app-editors/vim Link console vim against X11 libraries to enable title and clipboard features in xterm
gui-libs/wlroots Enable support for X11 applications (XWayland)
gui-wm/sway Enable support for X11 applications (XWayland)
sys-apps/duc Use X11 for the GUI instead of OpenGL. This is the recommended option
media-gfx/fbida Install the Motif based image viewer "ida"
media-libs/gst-plugins-base Enable ximagesink and xvimagesink plugins; build GLX platform support if USE=opengl is enabled; build x11 windowing system support if USE=egl is enabled
media-video/vlc Enable support for e.g. fullscreen mode via X and the X C-language binding. It does not build a graphical interface
app-misc/neofetch Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal
sys-apps/hwloc use the X Window System
media-sound/pulseaudio Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
net-irc/quassel Build the Qt5 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client.
dev-lisp/cmucl Build CLX, CLM, or Hemlock
media-libs/imlib2 Use the X window system
app-misc/screenfetch Use the media-gfx/scrot package to take screenshots
x11-apps/igt-gpu-tools Enable intel-gpu-overlay xlib/cairo backend
x11-libs/gdk-pixbuf Build and install the legacy gdk_pixbuf_xlib-2.0 library
x11-libs/pango Build and install the legacy pangoxft library
media-radio/ax25-tools Enable some X based configuration tools.
x11-drivers/nvidia-drivers Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries
dev-libs/m17n-lib Build the Graphical User Interface API and utilities
kde-misc/kdeconnect Enable remote input mousepad plugin using x11-libs/libfakekey
net-print/hplip Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends
media-gfx/graphviz Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)
net-im/qtox Adds support for X11

All packages providing a “X” USE flag (508)