Tests/RunCMake/PrecompileHeaders/foo.c - third_party/github.com/Kitware/CMake - Git at Google

 #include "foo.h"

 #include "foo2.h"

 int foo(void)
 {
   return 0;
 }

 int foo2(void)
 {
   return 0;
 }
	#include "foo.h"

	#include "foo2.h"

	int foo(void)
	{
	return 0;
	}

	int foo2(void)
	{
	return 0;
	}