From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:29:49 +0000 (+0200)
Subject: Fix gvmap -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~17
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2eb96aa329c3e58ac15d16aec3cdbaadc4101a19;p=graphviz

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

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

diff --git a/cmd/gvmap/gvmap.c b/cmd/gvmap/gvmap.c
index 5fa4c934e..8de13a610 100644
--- a/cmd/gvmap/gvmap.c
+++ b/cmd/gvmap/gvmap.c
@@ -389,7 +389,7 @@ init(int argc, char **argv, params_t* pm)
       fprintf(stderr, "gvpack: option -%c missing argument - ignored\n", optopt);
       break;
     case '?':
-      if (optopt == '\0')
+      if (optopt == '\0' || optopt == '?')
         usage(cmd, 0);
       else {
         fprintf(stderr, " option -%c unrecognized\n", optopt);