depends -sub CXX gcc     &&
depends  boost           &&
depends  expat           &&
depends  libebml         &&
depends  libmatroska     &&
depends  libogg          &&
depends  libvorbis       &&
depends  zlib            &&
depends  libxslt         &&
depends  po4a            &&
depends  rake            &&

sub_depends boost FILESYSTEM &&
sub_depends boost REGEX      &&
sub_depends boost SYSTEM     &&
sub_depends boost DATE_TIME  &&

optional_depends qtbase   --{en,dis}able-qt     \
                 "for Qt mkvinfo and mmg gui"   &&
optional_depends flac     --with{,out}-flac     \
                 "for FLAC support"             &&
optional_depends file     --{en,dis}able-magic  \
                 'for automatic content type detection' &&
optional_depends GETTEXT  --with{,out}-gettext  \
                 'for gettext support'