Tests/CMakeOnly/CheckStructHasMember/cm_cshm.h - third_party/cmake - Git at Google

 #ifndef _CSHM_DUMMY_H
 #define _CSHM_DUMMY_H

 struct non_existent_struct;
 struct struct_with_member{
     int member;
 };

 #endif
	#ifndef _CSHM_DUMMY_H
	#define _CSHM_DUMMY_H

	struct non_existent_struct;
	struct struct_with_member{
	int member;
	};

	#endif