From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:32:44 +0000 (+0200)
Subject: Fix tred -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4af536eca31c000f4f673b24db9ddaed775544c3;p=graphviz

Fix tred -? to actually print usage instead of error on macOS

Final commit that fixes https://gitlab.com/graphviz/graphviz/-/issues/1852.
---

diff --git a/cmd/tools/tred.c b/cmd/tools/tred.c
index 4fec5e874..84b3e3086 100644
--- a/cmd/tools/tred.c
+++ b/cmd/tools/tred.c
@@ -257,7 +257,7 @@ static void init(int argc, char *argv[])
         PrintRemovedEdges = 1;
         break;
 	case '?':
-	    if (optopt == '\0')
+	    if (optopt == '\0' || optopt == '?')
 		usage(0);
 	    else {
 		fprintf(stderr, "%s: option -%c unrecognized\n",