1  #include <stdlib.h>
       2  #include <stdio.h>
       3  
       4  extern int visibility_var_weak
       5    __attribute__ ((weak, visibility ("hidden")));
       6  
       7  int
       8  main ()
       9  {
      10    if (&visibility_var_weak != NULL)
      11      abort ();
      12  
      13    printf ("PASS\n");
      14  
      15    return 0;
      16  }