From 4acb3ef0203647062b37b11e1d54700e3833c364 Mon Sep 17 00:00:00 2001
From: Arun Raghavan <git@arunraghavan.net>
Date: Mon, 25 Jan 2016 08:41:42 +0530
Subject: [PATCH] build-sys: Use C++11 for building

This requirement was added by gtkmm at some point:

http://www.murrayc.com/permalink/2015/07/31/gtkmm-now-uses-c11/
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index e34e975..ee8a0e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,6 +39,7 @@ AC_PROG_CC
 AC_PROG_LN_S
 AC_TYPE_SIGNAL
 AC_HEADER_STDC
+AX_CXX_COMPILE_STDCXX_11
 
 AC_ARG_ENABLE(gtk3,
    [AS_HELP_STRING([--disable-gtk3],