Tests/RunCMake/BuildDepends/BuildUnderSource.c - third_party/github.com/Kitware/CMake - Git at Google

 #include "BuildUnderSource.h"
 int main(void)
 {
   return BUILD_UNDER_SOURCE;
 }
	#include "BuildUnderSource.h"
	int main(void)
	{
	return BUILD_UNDER_SOURCE;
	}