171 				if(strcasecmp(optarg, a->name) == 0) {  in main()
179 				warnx("unknown algorithm: %s", optarg);  in main()
195 			if (optarg != NULL) {  in main()
196 				diff_context = (int) strtonum(optarg,  in main()
200 					    errstr, optarg);  in main()
212 			ifdefname = optarg;  in main()
237 			most_recent_pat = xstrdup(optarg);  in main()
240 			push_ignore_pats(optarg);  in main()
247 				label[0] = optarg;  in main()
249 				label[1] = optarg;  in main()
282 			start = optarg;  in main()
298 			if (optarg != NULL) {  in main()
299 				diff_context = (int) strtonum(optarg,  in main()
303 					    errstr, optarg);  in main()
312 			width = (int) strtonum(optarg, 1, INT_MAX, &errstr);  in main()
314 				warnx("width is %s: %s", errstr, optarg);  in main()
319 			read_excludes_file(optarg);  in main()
322 			push_excludes(optarg);  in main()
333 			group_format = optarg;  in main()
353 			tabsize = (int) strtonum(optarg, 1, INT_MAX, &errstr);  in main()
355 				warnx("tabsize is %s: %s", errstr, optarg);  in main()
366 			if (optarg == NULL || strncmp(optarg, "auto", 4) == 0)  in main()
368 			else if (strncmp(optarg, "always", 6) == 0)  in main()
370 			else if (strncmp(optarg, "never", 5) == 0)  in main()
375 				    "%s", optarg);  in main()