From 2eb96aa329c3e58ac15d16aec3cdbaadc4101a19 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 08:29:49 +0200
Subject: [PATCH] Fix gvmap -? to actually print usage instead of error on
 macOS

Towards https://gitlab.com/graphviz/graphviz/-/issues/1852.
---
 cmd/gvmap/gvmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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);
-- 
2.50.1