depends gtk+2 &&
optional_depends exiv2 \
                 "--enable-exiv2" \
                 "--disable-exiv2" \
                 "exiv2 support" &&
optional_depends lcms \
                 "--enable-lcms" \
                 "--disable-lcms" \
                 "lcms support" &&
optional_depends libchamplain \
                 "" \
                 "" \
                 "support for displaying maps"
