From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:31:49 +0000 (+0200)
Subject: Fix mm2gv -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~12
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4e57a9e7e60862fcf462e3ee26ac638db1e15eef;p=graphviz

Fix mm2gv -? to actually print usage instead of error on macOS

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

diff --git a/cmd/tools/mm2gv.c b/cmd/tools/mm2gv.c
index 73a1f6a97..0c4434d5a 100644
--- a/cmd/tools/mm2gv.c
+++ b/cmd/tools/mm2gv.c
@@ -421,7 +421,7 @@ static void init(int argc, char **argv, parms_t * p)
 	    fprintf(stderr, "%s: option -%c missing argument - ignored\n", cmd, optopt);
 	    break;
  	case '?':
-	    if (optopt == '\0')
+	    if (optopt == '\0' || optopt == '?')
 		usage(0);
 	    else {
 		fprintf(stderr,