diff -up ./boost/concept/detail/general.hpp~ ./boost/concept/detail/general.hpp

--- ./boost/concept/detail/general.hpp~	2010-06-08 12:31:13.000000000 -0700

+++ ./boost/concept/detail/general.hpp	2013-07-18 06:01:05.967747186 -0700

@@ -6,6 +6,7 @@

 # include <boost/preprocessor/cat.hpp>

 # include <boost/concept/detail/backward_compatibility.hpp>

+# include <boost/static_assert.hpp>

 # ifdef BOOST_OLD_CONCEPT_SUPPORT

 #  include <boost/concept/detail/has_constraints.hpp>

@@ -68,7 +69,8 @@ struct requirement_<void(*)(Model)>

 #  define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )             \

     typedef ::boost::concepts::detail::instantiate<          \

     &::boost::concepts::requirement_<ModelFnPtr>::failed>    \

-      BOOST_PP_CAT(boost_concept_check,__LINE__)

+      BOOST_PP_CAT(boost_concept_check,__LINE__)	     \

+      BOOST_STATIC_ASSERT_UNUSED_ATTRIBUTE

 }}