optional_depends "glib-2"     "--with-gio"        "--without-gio" "for gio support"
optional_depends "GConf"      "--enable-gconf"    "--disable-gconf" "for GConf support"
optional_depends "alsa-utils" "--with-alsa"       "--without-alsa" "for alsa support"
optional_depends "pulseaudio" "--with-pulseaudio" "--without-pulseaudio" "for pulseaudio support"
