Tests/RunCMake/CompileFeatures/empty.c - third_party/github.com/Kitware/CMake - Git at Google

 #ifdef _WIN32
 __declspec(dllexport)
 #endif
   int empty(void)
 {
   return 0;
 }
	#ifdef _WIN32
	__declspec(dllexport)
	#endif
	int empty(void)
	{
	return 0;
	}