From 7b7d10fd84338eda5e84d166347c613c6e886948 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Fri, 5 Sep 2014 23:56:41 +0200
Subject: [PATCH] Remove _GLIBCXX_CONCEPT_CHECKS debug define

This debug feature does not support any C++11 features.
It breaks for example the compilation of vector<unique_ptr>.

The upstream issue is:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57011
---
 configure.ac | 1 -
 1 file changed, 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 752169e7..b2bbf515 100644
--- a/configure.ac
+++ b/configure.ac
@@ -203,7 +203,6 @@ if test "$DEBUG" != "no"; then
 		# But they cause crashes on cygwin while loading modules
 		AC_DEFINE([_GLIBCXX_DEBUG], [1], [Enable extra debugging checks in libstdc++])
 		AC_DEFINE([_GLIBCXX_DEBUG_PEDANTIC], [1], [Enable extra debugging checks in libstdc++])
-		AC_DEFINE([_GLIBCXX_CONCEPT_CHECKS], [1], [Enable extra debugging checks in libstdc++])
 	fi
 else
 	if test "x$OPTIMIZE" = "xyes"; then