From 2f1ba3b77f07f23ebbf0ad576985613331e4c3e4 Mon Sep 17 00:00:00 2001
From: Christophe Fergeau <cfergeau@redhat.com>
Date: Wed, 3 Dec 2014 16:51:13 +0100
Subject: [PATCH] build-sys: Add fallback for AS_VAR_APPEND

This macro is not available with RHEL6 autoconf.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 8613833..a58fcd6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,10 @@ AC_CONFIG_AUX_DIR([build-aux])
 # For automake >= 1.12
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 
+# For autoconf <= 2.63
+m4_ifndef([AS_VAR_APPEND],
+          AC_DEFUN([AS_VAR_APPEND], $1=$$1$2))
+
 # Checks for programs
 AM_INIT_AUTOMAKE([1.11 dist-xz no-dist-gzip tar-ustar foreign -Wall -Werror])
 AM_MAINTAINER_MODE