From 7443c55ec21c4d1475d834fd82348f8e2e14624a Mon Sep 17 00:00:00 2001
From: jgeboski <jgeboski@gmail.com>
Date: Sun, 9 Aug 2015 19:23:20 -0400
Subject: [PATCH] configure: depend on >=autoconf-2.64

The m4_esyscmd_s macro was introduced in autoconf-2.64.
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index 7effb9f3..54095272 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+AC_PREREQ([2.64])
+
 AC_INIT(
     [purple-facebook],
     m4_esyscmd_s([cat VERSION]),