1  /* { dg-do compile } */
       2  /* { dg-options "-O3 -fwhole-program" } */
       3  /* { dg-final { scan-assembler-not "mystr" } } */
       4  
       5  
       6  extern const char *mystr;       /* normally in a header */
       7  const char *mystr;
       8  int
       9  main()
      10  {
      11  }