1  #include <stdio.h>
       2  
       3  extern int foo;
       4  extern void bar (void);
       5  
       6  void
       7  xxx (void)
       8  {
       9    printf ("MAIN\n");
      10  }
      11  
      12  int
      13  main (void)
      14  {
      15    foo = 1;
      16    bar ();
      17    if (foo == -1)
      18      printf ("OK1\n");
      19    else if (foo == 1)
      20      printf ("OK2\n");
      21    return 0;
      22  }