1  /* Test old-style function definitions not in C2x: () does not warn
       2     with -Wold-style-definition.  */
       3  /* { dg-do compile } */
       4  /* { dg-options "-std=c2x -Wold-style-definition" } */
       5  
       6  void
       7  f ()
       8  {
       9  }