Added boost header

test/external/boost/graph/dll_import_export.hpp

@@ -0,0 +1,28 @@
+//=======================================================================
+// Copyright 2001 University of Notre Dame.
+// Copyright 2003 Jeremy Siek
+// Authors: Lie-Quan Lee, Jeremy Siek, and Douglas Gregor
+//
+// 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_GRAPH_DLL_IMPORT_EXPORT_HPP
+#define BOOST_GRAPH_DLL_IMPORT_EXPORT_HPP
+
+#include <boost/config.hpp>
+
+#if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_GRAPH_DYN_LINK)
+#  ifdef BOOST_GRAPH_SOURCE
+#    define BOOST_GRAPH_DECL BOOST_SYMBOL_EXPORT
+#  else
+#    define BOOST_GRAPH_DECL BOOST_SYMBOL_IMPORT
+#  endif  // BOOST_GRAPH_SOURCE
+#endif  // DYN_LINK
+
+#ifndef BOOST_GRAPH_DECL
+#  define BOOST_GRAPH_DECL
+#endif
+
+#endif // BOOST_GRAPH_DLL_IMPORT_EXPORT_HPP