depends autoconf && depends automake && depends libtool && optional_depends "alsa-lib" \ "--enable-alsa" \ "--disable-alsa" \ "for alsa sound support" && optional_depends esound \ "--enable-esd" \ "--disable-esd" \ "for esound sound support" && optional_depends sdl \ "--enable-sdl" \ "--disable-sdl" \ "for sdl sound support" && optional_depends nas \ "--enable-nas" \ "--disable-nas" \ "for nas sound support" && optional_depends smpeg \ "--enable-mp3" \ "--disable-mp3" \ "for smpeg sound support" && optional_depends libvorbis \ "--enable-vorbis" \ "--disable-vorbis" \ "for vorbis sound support"