OPTS="${OPTS} -DCMAKE_C_COMPILER=clang
            -DCMAKE_CXX_COMPILER=clang+
                      -DLLVM_DIR=${INSTALL_ROOT}/usr/lib/cmake/llvm
       -DLIBCLC_TARGETS_TO_BUILD='spirv-mesa3d-;spirv64-mesa3d-'" &&
default_build