| // { dg-do preprocess } | |
| // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=undef" } | |
| /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */ | |
| #if x // { dg-error "\"x\" is not defined, evaluates to 0 .-Werror=undef." } | |
| #endif |