Global USE flags

Flag Description Packages
wayland If unset, allows systems with '-wayland' set globally to compile (both this and 'gui' should be unset for CLI-only builds) 3

Local USE flags

app-admin

passgen-il

Flag Description
gui Build with GUI (CLI will still be usable)

app-editors

mg3a

Flag Description
backups Enable automatic backups
clikemode Enable C-like modes
cmode Enable old C mode
dired Enable dired
makemode Enable Makefile mode
mouse Enable mouse
noobjs Enable supressing .o files in dired
pipein Enable read from pipe at startup
prefixregion Enable prefix region
pythonmode Enable python mode
searchall Enable search-all commands
searchenter Enable end search with Enter key
searchsimple Enable simple search commands
slow Enable slow terminal emulation
ucsnames Enable Unicode character names
usermacros Enable user macros
usermodes Enable user modes

app-text

xreader

Flag Description
comics Support for the comic book (cbr) backend
djvu
dvi Support for the dvi backend
enable_dbus Enable D-Bus support
epub Support for the epub backend (requires webkit-gtk)
gtk_unix_print Print support
help_files Build the help files
introspection
keyring
pdf
pixbuf Support for the generic pixbuf image backend
previewer Build the print previewer program
ps Support for the PostScript backend
t1lib Compile with t1lib for type1 font support in the dvi backend
thumbnailer Build the thumbnailer program
tiff
xps Support for the xps backend

games-fps

nyan-doom

Flag Description
fluidsynth
mad
portmidi
sdl2-image
vorbis
xmp

sys-fs

climount

Flag Description
cryptsetup Installs cryptsetup as a dependency (doesn't affect compile); only needed if working on encrypted devices
lvm Installs lvm as a dependency (doesn't affect compile); only needed if working on lvm devices

x11-misc

zzzfm

Flag Description
desktop-integration Build with desktop icon and wallpaper management capabilities
gtk2 Build with GTK2 interface
gtk3 Build with GTK3 interface
video-thumbnails Generate video thumbnails with ffmpegthumbnailer

x11-wm

fluxbox

Flag Description
bidi
ewmh
imlib
nls
slit
systray
toolbar
truetype
vim-syntax
xinerama