optional_depends lame '--with-lame' '--without-lame' 'for MP3 audio support' &&
optional_depends twolame '--with-twolame' '--without-towlame' 'for MP2 audio support' &&
optional_depends libvorbis '--with-vorbis' '--without-vorbis' 'for ogg/vorbis audio support' &&
optional_depends faac '--with-faac' '--without-faac' 'for faac audio support' &&
optional_depends alsa-lib '--with-alsa' '--without-alsa' 'for alsa input support' &&
optional_depends jack '--with-jack' '--without-jack' 'for jack support'
