../../utils/w.c:385:44: error: expected ';' at end of declaration
  int maybe_add_user (struct proc_stat *ps)
                                           ^
                                           ;
../../utils/w.c:434:38: error: expected ';' at end of declaration
  int has_hook (struct proc_stat *ps) { return ps->hook != 0; }
                                     ^
                                     ;
../../utils/w.c:497:16: error: use of undeclared identifier 'argp'
  argp_parse (&argp, argc, argv, 0, 0, 0);
               ^
../../utils/w.c:509:36: error: use of undeclared identifier 'keep_users'
    proc_stat_list_filter1 (procs, keep_users, W_PSTAT_USER, 0);
                                   ^
4 errors generated.