gcc/testsuite/objc.dg/pch/interface-1.m - gcc - Git at Google

 #include "interface-1.h"

 @implementation TestClass
 + (int) test
 {
   return 0;
 }
 @end

 int main (void)
 {
   return [TestClass test];
 }
	#include "interface-1.h"

	@implementation TestClass
	+ (int) test
	{
	return 0;
	}
	@end

	int main (void)
	{
	return [TestClass test];
	}