cd /home/nbecker/shannon2/wrap/ g++34 -o Test Test.cc -g -I /usr/local/src/iostream/ In file included from /usr/local/src/iostream/boost/io/detail/streambufs/direct_streambuf.hpp:18, from /usr/local/src/iostream/boost/io/streambuf_facade.hpp:15, from /usr/local/src/iostream/boost/io/stream_facade.hpp:20, from Test.cc:1: /usr/local/src/iostream/boost/io/detail/streambufs/linked_streambuf.hpp:54: error: variable or field `close' declared void /usr/local/src/iostream/boost/io/detail/streambufs/linked_streambuf.hpp:54: error: `close' declared as a `virtual' field /usr/local/src/iostream/boost/io/detail/streambufs/linked_streambuf.hpp:54: error: expected `;' before '(' token In file included from /usr/local/src/iostream/boost/io/detail/adapters/filter_wrapper.hpp:16, from /usr/local/src/iostream/boost/io/detail/streambufs/indirect_streambuf.hpp:23, from /usr/local/src/iostream/boost/io/streambuf_facade.hpp:16, from /usr/local/src/iostream/boost/io/stream_facade.hpp:20, from Test.cc:1: /usr/local/src/iostream/boost/io/operations.hpp: In static member function `static void boost::io::detail::read_impl<boost::io::input>::putback(T&, typename boost::io::char_type<T>::type)': /usr/local/src/iostream/boost/io/operations.hpp:106: error: invalid application of `sizeof' to an incomplete type In file included from /usr/local/src/iostream/boost/io/detail/push.hpp:16, from /usr/local/src/iostream/boost/io/detail/streambufs/indirect_streambuf.hpp:28, from /usr/local/src/iostream/boost/io/streambuf_facade.hpp:16, from /usr/local/src/iostream/boost/io/stream_facade.hpp:20, from Test.cc:1: /usr/local/src/iostream/boost/io/detail/resolve.hpp: At global scope: /usr/local/src/iostream/boost/io/detail/resolve.hpp:38: error: non-template `result_type' used as template /usr/local/src/iostream/boost/io/detail/resolve.hpp:38: error: (use `U::template result_type' to indicate that it is a template) /usr/local/src/iostream/boost/io/detail/resolve.hpp:38: error: expected `{' before ';' token Adding #include <iostream> fixes this problem.