add boost on mac

macx64/include/boost/vmd/detail/is_empty_array.hpp

@@ -0,0 +1,20 @@
+
+//  (C) Copyright Edward Diener 2011-2015
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+
+#if !defined(BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_HPP)
+#define BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_HPP
+
+#include <boost/preprocessor/array/size.hpp>
+#include <boost/preprocessor/logical/not.hpp>
+
+#define BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_SIZE(array) \
+    BOOST_PP_NOT \
+        ( \
+        BOOST_PP_ARRAY_SIZE(array) \
+        ) \
+/**/
+
+#endif /* BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_HPP */