depends -sub CXX gcc        &&
depends  xorg-libs  &&

optional_depends  "zlib"              \
                  "--enable-zlib"     \
                  "--disable-zlib"    \
                  "for zlib support"  &&

optional_depends  "bzip2"             \
                  "--enable-libbz2"   \
                  "--disable-libbz2"  \
                  "for bzip2 support" &&

optional_depends  "avfs"              \
                  "--with-avfs"       \
                  "--without-avfs"    \
                  "for virtual file system support"
