Add support for X11

Packages describing “X” as local USE flag

Package “X” Flag Description
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
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.
media-gfx/fbida Install the Motif based image viewer "ida"
dev-qt/qtgui Build the XCB platform plugin and enable X11 integration
media-radio/ax25-tools Enable some X based configuration tools.
app-editors/vim Link console vim against X11 libraries to enable title and clipboard features in xterm
gui-wm/sway Enable support for X11 applications (XWayland)
gui-libs/wlroots Enable support for X11 applications (XWayland)
kde-apps/kio-extras Enable support for XCursor thumbnails via x11-libs/libX11
kde-misc/kdeconnect Enable remote input mousepad plugin using x11-libs/libfakekey
app-misc/neofetch Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal
app-admin/lastpass-cli Use x11-misc/xclip or x11-misc/xsel to copy passwords to the clipboard.
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.
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.
sys-apps/duc Use X11 for the GUI instead of OpenGL. This is the recommended option
app-misc/screenfetch Use the media-gfx/scrot package to take screenshots
dev-lisp/cmucl Build CLX, CLM, or Hemlock
dev-libs/m17n-lib Build the Graphical User Interface API and utilities
media-libs/imlib2 Use the X window system
net-im/qtox Adds support for X11
media-gfx/graphviz Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)
sys-apps/hwloc use the X Window System
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
net-print/hplip Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends
x11-drivers/nvidia-drivers Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries
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

All packages providing a “X” USE flag (502)