cmake FRUIT_HAS_STD_IS_TRIVIALLY_COPYABLE examples

google/fruit configuration/CMakeLists.txt :78 

CHECK_CXX_SOURCE_COMPILES("
#include <type_traits>
int main() {
  bool b = std::is_trivially_copyable<int>::value;
  (void) b;
  return 0;
}
"
FRUIT_HAS_STD_IS_TRIVIALLY_COPYABLE)