__clnt_create_loopback
client = __clnt_create_loopback(YPBINDPROG, YPBINDVERS, &err);
extern CLIENT *__clnt_create_loopback();
extern CLIENT *__clnt_create_loopback();
client = __clnt_create_loopback(YPBINDPROG, vers, &yperr);
extern CLIENT *__clnt_create_loopback(rpcprog_t, rpcvers_t, int *);
tb = __clnt_create_loopback(YPBINDPROG, YPBINDVERS, &err);
tb = __clnt_create_loopback(YPBINDPROG, YPBINDVERS, &err);