Gentoo Packages

app-admin/aslstatus: Add support for keymap indicator
app-i18n/fcitx: Enable support for XKB (required for fcitx-xkb, fcitx-xkbdbus, part of fcitx-keyboard)
sys-apps/systemd: Depend on <pkg>x11-libs/libxkbcommon</pkg> to allow logind to control the X11 keymap
sys-kernel/hurd: Depend on <pkg>x11-libs/libxkbcommon</pkg> for keymap support in the console.
sys-libs/libsystemd: Depend on <pkg>x11-libs/libxkbcommon</pkg> to allow logind to control the X11 keymap
x11-libs/libxcb: Enable the XCB keyboard extension

app-i18n/fcitx: Enable support for XKB (required for fcitx-xkb, fcitx-xkbdbus, part of fcitx-keyboard)
gui-apps/yambar: keyboard support for X11
sys-apps/systemd: Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap
sys-kernel/hurd: Depend on x11-libs/libxkbcommon for keymap support in the console.
x11-libs/libxcb: Enable the XCB keyboard extension

Warning: USE flag 'xkb' is used in ebuilds/metadata but is not defined in profiles/use.desc

Package	Local Description (use.local.desc)	Metadata Description (metadata.xml)
app-i18n/fcitx	Enable support for XKB (required for fcitx-xkb, fcitx-xkbdbus, part of fcitx-keyboard)	Enable support for XKB (required for fcitx-xkb, fcitx-xkbdbus, part of fcitx-keyboard)
sys-libs/libsystemd	-	Depend on <pkg>x11-libs/libxkbcommon</pkg> to allow logind to control the X11 keymap
app-admin/aslstatus	-	Add support for keymap indicator
sys-apps/systemd	Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap	Depend on <pkg>x11-libs/libxkbcommon</pkg> to allow logind to control the X11 keymap
sys-kernel/hurd	Depend on x11-libs/libxkbcommon for keymap support in the console.	Depend on <pkg>x11-libs/libxkbcommon</pkg> for keymap support in the console.
x11-libs/libxcb	Enable the XCB keyboard extension	Enable the XCB keyboard extension

USE Flag: xkb