1  #include <stdlib.h>
       2  #include <stdio.h>
       3  
       4  extern int foo_alias;
       5  extern char *bar ();
       6  
       7  int
       8  main ()
       9  {
      10    if (foo_alias != 0)
      11      abort ();
      12    bar ();
      13    if (foo_alias != -1)
      14      abort ();
      15    printf ("PASS\n");
      16    return 0;
      17  }