Dir_MTime
if (noExecute || is_out_of_date(Dir_MTime(gn)))
if (noExecute || is_out_of_date(Dir_MTime(sib)))
extern struct timespec Dir_MTime(GNode *);
} else if (is_out_of_date(Dir_MTime(gn))) {
(void)Dir_MTime(gn);
if (noExecute || is_out_of_date(Dir_MTime(cgn)))