1  /* { dg-do compile } */
       2  /* { dg-options "-fdiagnostics-show-caret" } */
       3  
       4  extern void __emit_warning (const char *message);
       5  
       6  static void test_1 (void)
       7  {
       8    __emit_warning ("warning 1");
       9  }
      10  
      11  /* { dg-begin-multiline-output "" }
      12  ================================= BEGIN GROUP ==============================
      13  PREFIX
      14     __emit_warning ("warning 1");
      15     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      16  PREFIX: message for note
      17  PREFIX:  some more detail
      18  PREFIX:   yet more detail
      19  ---------------------------------- END GROUP -------------------------------
      20     { dg-end-multiline-output "" } */
      21  
      22  /* { dg-begin-multiline-output "" }
      23  ================================= BEGIN GROUP ==============================
      24  PREFIX: an unrelated message
      25  ---------------------------------- END GROUP -------------------------------
      26     { dg-end-multiline-output "" } */