1: #include <unistd.h>
    2: 
    3: extern int dep1 (void);
    4: extern int dep2 (void);
    5: extern int dep4 (void);
    6: 
    7: static void
    8: __attribute__ ((constructor))
    9: init (void)
   10: {
   11:   write (1, "3", 1);
   12: }
   13: 
   14: static void
   15: __attribute__ ((destructor))
   16: fini (void)
   17: {
   18:   write (1, "6", 1);
   19: }
   20: 
   21: int
   22: dep1 (void)
   23: {
   24:   return dep4 () - dep2 ();
   25: }