Tests/CxxOnly/testCxxModule.cxx - third_party/github.com/Kitware/CMake - Git at Google

 #ifdef _WIN32
 #  define TEST_EXPORT __declspec(dllexport)
 #else
 #  define TEST_EXPORT
 #endif
 TEST_EXPORT int testCxxModule(void)
 {
   return 0;
 }
	#ifdef _WIN32
	# define TEST_EXPORT __declspec(dllexport)
	#else
	# define TEST_EXPORT
	#endif
	TEST_EXPORT int testCxxModule(void)
	{
	return 0;
	}