depends re2c
depends bison

optional_depends python \
                 "-DCLINGO_BUILD_WITH_PYTHON=ON" \
                 "-DCLINGO_BUILD_WITH_PYTHON=OFF" \
                 "build python scripting extension"

optional_depends lua \
                 "-DCLINGO_BUILD_WITH_LUA=ON" \
                 "-DCLINGO_BUILD_WITH_LUA=OFF" \
                 "build lua scripting extension"
