clearenvelope
clearenvelope(e, true, rpool);
clearenvelope(&MainEnvelope, false, sm_rpool_new_x(NULL));
clearenvelope(e, false, rpool);
clearenvelope(e, false, rpool);
clearenvelope(&e, true, rpool);
clearenvelope(&e, false, e.e_rpool);
clearenvelope(&e, true, sm_rpool_new_x(NULL));
extern void clearenvelope __P((ENVELOPE *, bool, SM_RPOOL_T *));