test/mac/objc-arc/m-file-no-arc.m

#if __has_feature(objc_arc)
#error "ObjC files without CLANG_ENABLE_OBJC_ARC should not be ARC'd!"
#endif

#if __has_feature(objc_arc_weak)
#error "Without CLANG_ENABLE_OBJC_WEAK, weak references should be disabled."
#endif

void m_fun() {}