From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:29:03 +0000 (+0200)
Subject: Fix cluster -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~18
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1e3642b1824af1f8e5bb4a335601ff69b5f034b3;p=graphviz

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

Towards https://gitlab.com/graphviz/graphviz/-/issues/1852.
---

diff --git a/cmd/gvmap/cluster.c b/cmd/gvmap/cluster.c
index e5232bac9..a7fcdf7c9 100644
--- a/cmd/gvmap/cluster.c
+++ b/cmd/gvmap/cluster.c
@@ -120,7 +120,7 @@ static void init(int argc, char *argv[], opts_t* opts) {
       Verbose = 1;
       break;
     case '?':
-      if (optopt == '\0')
+      if (optopt == '\0' || optopt == '?')
 	usage(cmd, 0);
       else {
 	fprintf(stderr, " option -%c unrecognized\n",