add boost on mac

macx64/include/boost/gil/concepts/fwd.hpp

@@ -0,0 +1,36 @@
+//
+// Copyright 2005-2007 Adobe Systems Incorporated
+//
+// Distributed under 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
+//
+#ifndef BOOST_GIL_CONCEPTS_FWD_HPP
+#define BOOST_GIL_CONCEPTS_FWD_HPP
+
+namespace boost { namespace gil {
+
+// Forward declarations used by concepts
+
+template <typename ColorBase, int K> struct kth_element_type;
+template <typename ColorBase, int K> struct kth_element_reference_type;
+template <typename ColorBase, int K> struct kth_element_const_reference_type;
+template <typename ColorBase, int K> struct kth_semantic_element_reference_type;
+template <typename ColorBase, int K> struct kth_semantic_element_const_reference_type;
+template <typename ColorBase> struct size;
+template <typename ColorBase> struct element_type;
+
+template <typename T> struct is_pixel;
+template <typename T> struct is_planar;
+template <typename T> struct channel_type;
+template <typename T> struct color_space_type;
+template <typename T> struct channel_mapping_type;
+template <typename T> struct num_channels;
+
+template <typename T> struct dynamic_x_step_type;
+template <typename T> struct dynamic_y_step_type;
+template <typename T> struct transposed_type;
+
+}} // namespace boost::gil
+
+#endif