From 3f1842a89e477e666cad6b1d3313de3468670889 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrgen=20Hunold?= <jhunold@gmx.eu>
Date: Sat, 10 Apr 2010 17:50:26 +0000
Subject: [PATCH] Dummy-Constructor only for gcc > 4.

[SVN r61185]
---
 include/boost/concept_check.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/concept_check.hpp b/include/boost/concept_check.hpp
index f051c72..7ee3036 100644
--- a/include/boost/concept_check.hpp
+++ b/include/boost/concept_check.hpp
@@ -331,7 +331,8 @@ namespace boost
           f(arg);
       }
 
-#if BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4))
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
       // Declare a dummy construktor to make gcc happy.
       // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
       // (warning: non-static reference "const double& boost::UnaryFunction<YourClassHere>::arg"