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diff --git a/src/boost/libs/serialization/example/demo_polymorphic_A.cpp b/src/boost/libs/serialization/example/demo_polymorphic_A.cpp
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+++ b/src/boost/libs/serialization/example/demo_polymorphic_A.cpp
@@ -0,0 +1,26 @@
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// demo_polymorphic_A.cpp
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
+// 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)
+
+
+#include <boost/archive/polymorphic_iarchive.hpp>
+#include <boost/archive/polymorphic_oarchive.hpp>
+
+#include "demo_polymorphic_A.hpp"
+
+// explicitly instantiate templates for polymorphic archives
+// used by this demo.
+template
+void A::serialize<boost::archive::polymorphic_iarchive>(
+    boost::archive::polymorphic_iarchive &,
+    const unsigned int
+);
+template
+void A::serialize<boost::archive::polymorphic_oarchive>(
+    boost::archive::polymorphic_oarchive &,
+    const unsigned int
+);