Tests/ConfigSources/main_one_config.cpp - third_party/github.com/Kitware/CMake - Git at Google

 #include "iface.h"
 int main()
 {
 #ifdef CFG_ONE
   iface_src();
 #endif
   return 0;
 }
	#include "iface.h"
	int main()
	{
	#ifdef CFG_ONE
	iface_src();
	#endif
	return 0;
	}