optional_depends alsa-utils  "--with-alsa"      "--without-alsa"        "for alsa support"
optional_depends libpng      "--with-png"       "--without-png"         "for PNG support"
optional_depends libsndfile  "--with-sndfile"   "--without-sndfile"     "for lame support"
optional_depends libmad      "--with-mad"       "--without-mad"         "for mad support"
optional_depends flac        "--with-flac"      "--without-flac"        "for flac support"
optional_depends lame        "--with-lame"      "--without-lame"        "for lame support"
optional_depends libid3tag   "--with-id3tag"    "--without-id3tag"      "for MP3 tag support"
optional_depends libmad      "--with-mad"       "--without-mad"         "for mad support"
optional_depends ladspa_sdk  "--with-ladspa"    "--without-ladspa"      "for ladspa support"
optional_depends wavpack     "--with-wavpack"   "--without-wavpack"     "for loseless encoding support"
optional_depends libogg      "--with-oggvorbis"  "--without-oggvorbis"  "for OGG support"
optional_depends pulseaudio  "--with-pulseaudio" "--without-pulseaudio" "for pulseaudio support"
