| // RUN: %clang_cc1 -triple x86_64-apple-macosx -emit-llvm %s -o - | FileCheck %s | |
| // Test that we produce a declaration for the protocol. It must be matched | |
| // by a definition in another TU, so external is the correct linkage | |
| // (not extern_weak). | |
| // CHECK: @"\01l_OBJC_PROTOCOL_$_p1" = external global | |
| @interface NSObject | |
| @end | |
| @protocol p1; | |
| @interface I1 : NSObject <p1> | |
| @end | |
| @implementation I1 | |
| @end |