add boost on mac

macx64/include/boost/gil/io/error.hpp

@@ -0,0 +1,29 @@
+//
+// Copyright 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev
+//
+// 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_IO_ERROR_HPP
+#define BOOST_GIL_IO_ERROR_HPP
+
+#include <ios>
+
+namespace boost { namespace gil {
+
+inline void io_error(const char* descr)
+{
+   throw std::ios_base::failure(descr);
+}
+
+inline void io_error_if(bool expr, const char* descr)
+{
+   if (expr)
+      io_error(descr);
+}
+
+} // namespace gil
+} // namespace boost
+
+#endif