From 07baa163b8d4a778be9d51a49c0ae2cdeb60049e Mon Sep 17 00:00:00 2001
From: Robert Scheck <robert@fedoraproject.org>
Date: Wed, 11 Dec 2019 01:51:36 +0100
Subject: [PATCH] Emulate m4_esyscmd_s for autoconf 2.63 (RHEL/CentOS 6)

---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index ea69b82..449c085 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,3 +1,7 @@
+dnl Emulate m4_esyscmd_s for autoconf 2.63 (RHEL/CentOS 6)
+m4_ifndef([m4_esyscmd_s], [m4_define([m4_chomp_all], [m4_format([[%.*s]], m4_bregexp(m4_translit([[$1]], [/], [/ ]), [/*$]), [$1])])])
+m4_ifndef([m4_esyscmd_s], [m4_define([m4_esyscmd_s], [m4_chomp_all(m4_esyscmd([$1]))])])
+
 AC_INIT([rsnapshot],[m4_esyscmd_s([git describe --tags --always --dirty])],[rsnapshot-discuss@lists.sourceforge.net])
 AM_INIT_AUTOMAKE([foreign])
 AC_PROG_MAKE_SET