| // RUN: clang-cc %s -Eonly -Werror=undef -verify | |
| // RUN: clang-cc %s -Eonly -Werror-undef -verify | |
| extern int x; | |
| #if foo // expected-error {{'foo' is not defined, evaluates to 0}} | |
| #endif | |
| #ifdef foo | |
| #endif | |
| #if defined(foo) | |
| #endif | |
| // PR3938 | |
| #if 0 | |
| #ifdef D | |
| #else 1 // Should not warn due to C99 6.10p4 | |
| #endif | |
| #endif |