From f07950c60a43806b24d29e72c55c450e4cb70bdd Mon Sep 17 00:00:00 2001
From: Nobuyuki Kubota <nobu.k.jp+github@gmail.com>
Date: Tue, 9 Apr 2013 18:14:23 -0700
Subject: [PATCH] add the same test as commit:764bfdcb9f for
 __gnu_cxx::__exchange_and_add

refs #8
---
 configure.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index 3a79f257..e7540187 100644
--- a/configure.in
+++ b/configure.in
@@ -65,7 +65,7 @@ add CFLAGS="-march=i686" and CXXFLAGS="-march=i686" options to ./configure as fo
 			#include <bits/atomicity.h>
 			int atomic_sub(int i) { return __gnu_cxx::__exchange_and_add(&i, -1) - 1; }
 			int atomic_add(int i) { return __gnu_cxx::__exchange_and_add(&i, 1) + 1; }
-		], [], msgpack_cv_gcc_cxx_atomic_ops="yes")
+		], [atomic_sub(1); atomic_add(1);], msgpack_cv_gcc_cxx_atomic_ops="yes")
 		])
 	AC_LANG_POP([C++])