1  /* Test unreachable in <stddef.h> for C2x.  */
       2  /* { dg-do run } */
       3  /* { dg-options "-std=c2x -pedantic-errors -O2" } */
       4  
       5  #include <stddef.h>
       6  
       7  #ifndef unreachable
       8  #error "unreachable not defined"
       9  #endif
      10  
      11  extern void *p;
      12  extern __typeof__ (unreachable ()) *p;
      13  
      14  volatile int x = 1;
      15  
      16  extern void not_defined (void);
      17  
      18  extern void exit (int);
      19  
      20  int
      21  main ()
      22  {
      23    if (x == 2)
      24      {
      25        unreachable ();
      26        not_defined ();
      27      }
      28    exit (0);
      29  }