cmake HAVE_MSC_BYTESWAP examples

taglib/taglib ConfigureChecks.cmake :60 

check_cxx_source_compiles("
      #include <cstdlib>
      int main() {
        _byteswap_ushort(0);
        _byteswap_ulong(0);
        _byteswap_uint64(0);
        return 0;
      }
    " HAVE_MSC_BYTESWAP)