gcc/testsuite/gcc.dg/pr19984.c

   1 /* PR c/19984 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -std=c99 -Wpedantic" } */
   4
   5
   6 double nan (const char *);
   7
   8 const double nok = nan ("");    /* { dg-warning "(not a constant)|(near initialization)" } */
   9
  10 const double ok = __builtin_nan ("");
  11
  12 double
  13 foo ()
  14 {
  15   double ok2 = nan ("");
  16   return ok2;
  17 }