gcc/testsuite/gcc.dg/builtin-constant_p-1.c

   1 /* { dg-do compile } */
   2
   3 int main()
   4 {
   5   if (__builtin_constant_p ()) /* { dg-error "not enough" } */
   6     return 0;
   7   if (__builtin_constant_p (5, 6)) /* { dg-error "too many" } */
   8     return 1;
   9   return 0;
  10 }