diff -r 22486c9c7b15 -r 378360dbbdba imgtools/imglib/boostlibrary/boost/optional/optional_fwd.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imgtools/imglib/boostlibrary/boost/optional/optional_fwd.hpp	Wed Jun 30 11:35:58 2010 +0800
@@ -0,0 +1,22 @@
+// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+//
+// Use, modification, and distribution is 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)
+//
+// See http://www.boost.org/lib/optional for documentation.
+//
+// You are welcome to contact the author at:
+//  fernando_cacciola@hotmail.com
+//
+#ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
+#define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
+
+namespace boost {
+
+template<class T> class optional ;
+
+} // namespace boost
+
+#endif
+