optional_depends  qt4 \
                   "--enable-qimage --with-qt=$INSTALL_ROOT/usr" \
                   "-disable-qimage" \
                  "Use QImage to load/save images?"  &&
if is_depends_enabled $SPELL qt4; then
  depends -sub CXX gcc
fi &&
optional_depends  GIFLIB  ""  "--without-gif" \
                  "Enable giflib support?"  &&
optional_depends  JPEG  ""  "--without-jpeg" \
                  "Enable jpeg support?"  &&
optional_depends  zlib  ""  "--without-zlib" \
                  "Enable zlib support?"  &&
optional_depends  jasper  ""  "--without-jasper" \
                  "Enable jasper (JPEG 2000) support?"