1 // { dg-do preprocess }
2 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Werror=comments" }
3 /* { dg-message "some warnings being treated as errors" "" {target "*-*-*"} 0 } */
4 /* /* */  // { dg-error "\"\.\*\" within comment .-Werror=comment." }
5 
6 // \
7           // { dg-error "multi-line comment .-Werror=comment." "multi-line" { target *-*-* } 6 }
8