Tests/ComplexOneConfig/Executable/notInAllExe.cxx - third_party/github.com/Kitware/CMake - Git at Google

 extern int notInAllLibFunc();

 int main()
 {
   return notInAllLibFunc();
 }

 #if 1
 #  error "This target should not be compiled by ALL."
 #endif
	extern int notInAllLibFunc();

	int main()
	{
	return notInAllLibFunc();
	}

	#if 1
	# error "This target should not be compiled by ALL."
	#endif