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