Enabling it causes build failure due to missing giflib-5, see referenced bug.
Gentoo-Bug: 558678
Package-Manager: portage-2.2.20.1
LICENSE="GPL-2"
SLOT="0"
-IUSE="airplay alsa avahi bluetooth bluray caps cec css dbus debug +fishbmc gles goom java joystick midi mysql nfs +opengl profile +projectm pulseaudio +rsxs rtmp +samba sftp +spectrum test +texturepacker udisks upnp upower +usb vaapi vdpau +waveform webserver +X"
+IUSE="airplay alsa avahi bluetooth bluray caps cec css dbus debug +fishbmc gles goom java joystick midi mysql nfs +opengl profile +projectm pulseaudio +rsxs rtmp +samba sftp +spectrum test texturepacker udisks upnp upower +usb vaapi vdpau +waveform webserver +X"
REQUIRED_USE="
rsxs? ( X )
udisks? ( dbus )
LICENSE="GPL-2"
SLOT="0"
-IUSE="airplay alsa avahi bluetooth bluray caps cec css dbus debug +fishbmc gles goom java joystick midi mysql nfs +opengl profile +projectm pulseaudio +rsxs rtmp +samba sftp +spectrum test +texturepacker udisks upnp upower +usb vaapi vdpau +waveform webserver +X"
+IUSE="airplay alsa avahi bluetooth bluray caps cec css dbus debug +fishbmc gles goom java joystick midi mysql nfs +opengl profile +projectm pulseaudio +rsxs rtmp +samba sftp +spectrum test texturepacker udisks upnp upower +usb vaapi vdpau +waveform webserver +X"
REQUIRED_USE="
rsxs? ( X )
udisks? ( dbus )