From a1c64049fa7970bc4a0016d534b87f3f482fa956 Mon Sep 17 00:00:00 2001
From: Paul Norman <penorman@mac.com>
Date: Sat, 18 Jul 2015 01:00:08 -0700
Subject: [PATCH] Prefer c++11 over gnu++11

---
 configure.ac | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/configure.ac b/configure.ac
index fec86d966..f7c777a0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,16 +23,9 @@ AC_USE_SYSTEM_EXTENSIONS
 AC_HEADER_SYS_WAIT
 AC_FUNC_MMAP
 
-dnl Find C compiler
-dnl AC_PROG_CC_C99
-
 dnl Find C++ compiler
 AC_PROG_CXX
-AC_CHECK_PROG(HAVE_CXX, $CXX, yes, no)
-if test "$HAVE_CXX" = "no" 
-then
-  AC_MSG_ERROR([Could not find a c++ compiler]);
-fi
+AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
 
 AX_CFLAGS_WARN_ALL
 AX_CXXFLAGS_WARN_ALL
@@ -110,8 +103,6 @@ then
     AC_MSG_ERROR([One or more of the mandatory Boost libraries not found.])
 fi
 
-AX_CXX_COMPILE_STDCXX_11()
-
 dnl Check for Lua libraries and headers
 AX_PROG_LUA([5.0],[],[
     AX_LUA_HEADERS([