check_source_compiles ( C
        "int main(void) {
        #pragma clang loop vectorize(enable)
        for (int j = 0; j < 1; j++) { }
        return 0;
        }"
        HAVE_PRAGMA_CLANG_LOOP_VECTORIZE
        FAIL_REGEX "[wW]arning" )

target_compile_definitions ( UMFPACK PRIVATE "HAVE_PRAGMA_CLANG_LOOP_VECTORIZE" )

target_compile_definitions ( UMFPACK_static PRIVATE "HAVE_PRAGMA_CLANG_LOOP_VECTORIZE" )