gcc/testsuite/gcc.dg/pr14649-1.c

   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