test/SemaObjC/legacy-implementation-1.m

// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s

@implementation INTF // expected-warning {{cannot find interface declaration for 'INTF'}}
@end

INTF* pi;

INTF* FUNC(void)
{
	return pi;
}