depends  glib2   &&
depends  libpng  &&
depends  zlib    &&
depends  JPEG    &&
depends  tiff    &&

optional_depends libx11 \
                 '--with-x11' \
                 '--without-x11' \
                 'enable X11 support' &&

optional_depends gobject-introspection \
                 "--enable-introspection" \
                 "--disable-introspection" \
                 "enable gobject-introspection"
