-Wunused-local-typedef with gcc 4.8.1

[lpasquale@…]

I get a lot of warnings like

/install-dir/boost/include/boost/concept_check.hpp: In function ‘void boost::function_requires(Model*)’:
/install-dir/boost/include/boost/concept/detail/general.hpp:71:20: warning: typedef ‘boost_concept_check45’ locally defined but not used [-Wunused-local-typedefs]
       BOOST_PP_CAT(boost_concept_check,__LINE__)
                    ^
/install-dir/boost/include/boost/preprocessor/cat.hpp:29:34: note: in definition of macro ‘BOOST_PP_CAT_I’
 #    define BOOST_PP_CAT_I(a, b) a ## b
                                  ^
/install-dir/boost/include/boost/concept/detail/general.hpp:71:7: note: in expansion of macro ‘BOOST_PP_CAT’
       BOOST_PP_CAT(boost_concept_check,__LINE__)
       ^
/install-dir/boost/include/boost/concept/assert.hpp:44:5: note: in expansion of macro ‘BOOST_CONCEPT_ASSERT_FN’
     BOOST_CONCEPT_ASSERT_FN(void(*)ModelInParens)
     ^
/install-dir/boost/include/boost/concept_check.hpp:45:7: note: in expansion of macro ‘BOOST_CONCEPT_ASSERT’
       BOOST_CONCEPT_ASSERT((Model));
       ^

generated by different functions, but reletaed to the same macros.

[Heungson Lee]

I got the same warnings with gcc 4.8.2

[acharles <acharles@…>]

Fixed by: ​https://github.com/boostorg/concept_check/commit/d2d56f6de842a90925c31bdf09f5e3c87b5cda8e

Fix will be in the next release.