From b6fd32738e015d7320593e00156346e6f2c00068 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Sun, 4 Oct 2020 20:58:25 +0200
Subject: [PATCH] Explicitly specify -? as an option in tred

---
 cmd/tools/tred.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cmd/tools/tred.c b/cmd/tools/tred.c
index 386b1f23d..4fec5e874 100644
--- a/cmd/tools/tred.c
+++ b/cmd/tools/tred.c
@@ -248,7 +248,7 @@ static void init(int argc, char *argv[])
 
     CmdName = argv[0];
     opterr = 0;
-    while ((c = getopt(argc, argv, "vr")) != -1) {
+    while ((c = getopt(argc, argv, "vr?")) != -1) {
 	switch (c) {
 	case 'v':
 	    Verbose = 1;
@@ -257,7 +257,7 @@ static void init(int argc, char *argv[])
         PrintRemovedEdges = 1;
         break;
 	case '?':
-	    if (optopt == '?')
+	    if (optopt == '\0')
 		usage(0);
 	    else {
 		fprintf(stderr, "%s: option -%c unrecognized\n",
-- 
2.40.0