From 4264e7a6edb651793ef751723537767656a89e44 Mon Sep 17 00:00:00 2001
From: ghciv6 <ghciv6@maginus.de>
Date: Mon, 13 Apr 2020 20:44:26 +0200
Subject: - workaround for issue #1550 - better use "ping -4" instead of "ping"
 if supported


diff --git a/configure.ac b/configure.ac
index 08a0e78..4a9a92a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1064,6 +1064,14 @@ then
 	ac_cv_ping_packets_first=yes
 	AC_MSG_RESULT([$with_ping_command])
 
+elif $PATH_TO_PING -4 -n -U -w 10 -c 1 127.0.0.1 2>/dev/null | \
+	egrep -i "^round-trip|^rtt" >/dev/null
+then
+	# check if -4 is supported - issue #1550
+	with_ping_command="$PATH_TO_PING -4 -n -U -w %d -c %d %s"
+	ac_cv_ping_packets_first=yes
+	ac_cv_ping_has_timeout=yes
+	AC_MSG_RESULT([$with_ping_command])
 elif $PATH_TO_PING -n -U -w 10 -c 1 127.0.0.1 2>/dev/null | \
 	egrep -i "^round-trip|^rtt" >/dev/null
 then
-- 
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