| // RUN: %clang_cc1 -fmodules-ts -verify %s | |
| // A named module shall contain exactly one module interface unit. | |
| module M; // expected-error {{definition of module 'M' is not available; use -fmodule-file= to specify path to precompiled module interface}} | |
| // FIXME: How do we ensure there is not more than one? |