1  /* { dg-do compile } */
       2  /* { dg-options "-fstrict-overflow -O2" } */
       3  /* { dg-message "warnings being treated as errors" "" {target "*-*-*"} 0 } */
       4  #pragma GCC diagnostic error "-Wstrict-overflow"
       5  
       6  int
       7  foo (int i)
       8  {
       9    return __builtin_abs (i) >= 0; /* { dg-error "assuming signed overflow does not occur" "correct warning" } */
      10  }