erroradd
void erroradd(int, char **, Errorclass, Errorclass);
erroradd(cur_wordc, cur_wordv+1, errorclass, C_UNKNOWN);
erroradd(cur_wordc+2, nwordv1, C_TRUE, C_DUPL); /* takes 0 based*/
erroradd(undefined ? 4 : 5, nwordv,
erroradd(cur_wordc, nwordv, C_TRUE, C_UNKNOWN);