../../utils/ps.c:194:56: error: expected ';' at end of declaration
  error_t add_uid (uid_t uid, struct argp_state *state)
                                                       ^
                                                       ;
../../utils/ps.c:361:33: error: use of undeclared identifier 'parse_opt'
  struct argp argp = { options, parse_opt, 0, doc, argp_kids };
                                ^
../../utils/ps.c:361:52: error: use of undeclared identifier 'argp_kids'
  struct argp argp = { options, parse_opt, 0, doc, argp_kids };
                                                   ^
../../utils/ps.c:421:38: error: use of undeclared identifier 'proc_stat_owner_ok'; did you mean 'proc_setowner'?
    proc_stat_list_filter1 (procset, proc_stat_owner_ok,
                                     ^~~~~~~~~~~~~~~~~~
                                     proc_setowner
/usr/include/hurd/process.h:884:15: note: 'proc_setowner' declared here
kern_return_t proc_setowner
              ^
../../utils/ps.c:428:39: error: use of undeclared identifier 'proc_stat_has_ctty'; did you mean 'proc_stat_list_fmt'?
      proc_stat_list_filter1(procset, proc_stat_has_ctty, 0, FALSE);
                                      ^~~~~~~~~~~~~~~~~~
                                      proc_stat_list_fmt
../../utils/../libps/ps.h:1004:9: note: 'proc_stat_list_fmt' declared here
error_t proc_stat_list_fmt (struct proc_stat_list *pp, struct ps_fmt *fmt,
        ^
5 errors generated.