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diff --git a/boost/local_function/aux_/macro/decl.hpp b/boost/local_function/aux_/macro/decl.hpp
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+++ b/boost/local_function/aux_/macro/decl.hpp
@@ -0,0 +1,65 @@
+
+// Copyright (C) 2009-2012 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0
+// (see accompanying file LICENSE_1_0.txt or a copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+// Home at http://www.boost.org/libs/local_function
+
+#ifndef BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_
+#define BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_
+
+#include <boost/local_function/aux_/macro/code_/result.hpp>
+#include <boost/local_function/aux_/macro/code_/bind.hpp>
+#include <boost/local_function/aux_/macro/code_/functor.hpp>
+#include <boost/local_function/aux_/preprocessor/traits/decl.hpp>
+#include <boost/local_function/aux_/preprocessor/traits/decl_error.hpp>
+#include <boost/scope_exit.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/preprocessor/facilities/is_empty.hpp>
+#include <boost/preprocessor/list/adt.hpp>
+#include <boost/preprocessor/tuple/eat.hpp>
+
+// PRIVATE //
+
+#define BOOST_LOCAL_FUNCTION_AUX_DECL_OK_(id, typename01, decl_traits) \
+    BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT(id, typename01, decl_traits) \
+    BOOST_LOCAL_FUNCTION_AUX_CODE_BIND(id, typename01, decl_traits) \
+    BOOST_LOCAL_FUNCTION_AUX_CODE_FUNCTOR(id, typename01, decl_traits) 
+
+#define BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_(id, typename01, decl_traits) \
+    BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS( \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_RETURNS(decl_traits)), \
+        /* return specified, so no result type before this macro expansion */ \
+        BOOST_PP_TUPLE_EAT(1) \
+    , \
+        /* even if error, must declare result type to prevent additional */ \
+        /* error due to result type appearing before this macro expansion */ \
+        BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT_DECL \
+    )(id) \
+    ; /* close eventual previous statements, otherwise it has no effect */ \
+    BOOST_MPL_ASSERT_MSG(false, /* always fails (there's an error) */ \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits), ())\
+    ; /* must close ASSERT macro for eventual use within class scope */
+
+// PUBLIC //
+
+#define BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR \
+    BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (args) )
+
+// Undefine local function bound args global variable. Actual declaration of
+// this variable is made using SFINAE mechanisms by each local function macro.
+extern boost::scope_exit::detail::undeclared
+        BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR;
+
+// sign_params: parsed parenthesized params.
+#define BOOST_LOCAL_FUNCTION_AUX_DECL(id, typename01, decl_traits) \
+    BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits)), \
+        BOOST_LOCAL_FUNCTION_AUX_DECL_OK_ \
+    , \
+        BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_ \
+    )(id, typename01, decl_traits)
+
+#endif // #include guard
+