1  extern int inside_main;
       2  
       3  __attribute__ ((__noinline__))
       4  void
       5  bzero (void *s, __SIZE_TYPE__ n)
       6  {
       7    char *p;
       8  
       9    for (p = s; n-- > 0; p++)
      10      *p = 0;
      11  
      12  #ifdef __OPTIMIZE__
      13    if (inside_main)
      14      abort ();
      15  #endif
      16  }