1  /* PR c/14649 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -Wpedantic" } */
       4  
       5  double atan(double);
       6  
       7  const double pi = 4*atan(1.0);  /* { dg-warning "not a constant expression" } */
       8  
       9  const double ok = 4*__builtin_atan(1.0);
      10  
      11  double foo()
      12  {
      13    double ok2 = 4*atan(1.0);
      14    return ok2;
      15  }
      16