From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:31:02 +0000 (+0200)
Subject: Fix gvcolor -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~14
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5c0b496f214859fb0dfab5e0860bf34b51043f3f;p=graphviz

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

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

diff --git a/cmd/tools/gvcolor.c b/cmd/tools/gvcolor.c
index e73bf9cad..62c55507e 100644
--- a/cmd/tools/gvcolor.c
+++ b/cmd/tools/gvcolor.c
@@ -91,7 +91,7 @@ static void init(int argc, char *argv[])
     while ((c = getopt(argc, argv, ":?")) != -1) {
 	switch (c) {
 	case '?':
-	    if (optopt == '\0')
+	    if (optopt == '\0' || optopt == '?')
 		usage(0);
 	    else {
 		fprintf(stderr, "gvcolor: option -%c unrecognized\n",