4270 ld(1) argument error reporting is still pretty bad

@@ -1677,12 +1677,23 @@
                         }
                         break;
 
                 case '?':
                         DBG_CALL(Dbg_args_option(ofl->ofl_lml, ndx, c, NULL));
+                        /*
+                         * If the option character is '-', we're looking at a
+                         * long option which couldn't be translated, display a
+                         * more useful error.
+                         */
+                        if (optopt == '-') {
+                                eprintf(ofl->ofl_lml, ERR_FATAL,
+                                    MSG_INTL(MSG_ARG_LONG_UNKNOWN),
+                                    argv[optind-1]);
+                        } else {
                         eprintf(ofl->ofl_lml, ERR_FATAL,
                             MSG_INTL(MSG_ARG_UNKNOWN), optopt);
+                        }
                         (*usage)++;
                         break;
 
                 default:
                         break;