Hi, I get the following error when trying to compile a simple test (attached) using vector_sink from the tutorial with MinGW GCC 3.4.2: boost_iostreams.cpp: In function `int main()': boost_iostreams.cpp:41: error: invalid operands of types `boost::io::streambuf_facade< vector_sink, char_traits<char>, boost::io::output > ()(vector_sink)' and `int' to binary `operator<<' Please accept my apologies if I've overlooked something crucial in the docs. In case it matters, here is a list of changes I made to make the lib compile cleanly: 1. E:\libs\boost\libs\iostreams\build\../src/mapped_file.cpp:168: error: `::GetFileSizeEx' has not been declared According to MSDN, GetFileSizeEx() is only available under Windows 2000 and newer, so I had to remove this file from Jamfile sources. Maybe there should be a define for this, like for the compression code. 2. E:/libs/boost/boost/iostreams/detail/streambuf/indirect_streambuf.hpp:150: error: `default_filter_buffer_size' undeclared (first use this function) E:/libs/boost/boost/iostreams/detail/streambuf/indirect_streambuf.hpp:151: error: `default_buffer_size' undeclared (first use this function) E:/libs/boost/boost/iostreams/detail/streambuf/indirect_streambuf.hpp:155: error: `default_pback_buffer_size' undeclared (first use this function) Fixed by including 'boost/iostreams/constants.hpp'. 3. E:/libs/boost/boost/iostreams/categories.hpp:102: warning: virtual base `boost::io::input_seekable' inaccessible in `boost::io::iostream_tag' due to ambiguity E:/libs/boost/boost/iostreams/categories.hpp:102: warning: virtual base `boost::io::device_tag' inaccessible in `boost::io::iostream_tag' due to ambiguity E:/libs/boost/boost/iostreams/categories.hpp:102: warning: virtual base `boost::io::output_seekable' inaccessible in `boost::io::iostream_tag' due to ambiguity Fixed by replacing struct seekable_device_tag : device_tag, seekable { }; with struct seekable_device_tag : virtual device_tag, seekable { }; and struct seekable : input_seekable, output_seekable, detail::one_head { }; with struct seekable : virtual input_seekable, virtual output_seekable, detail::one_head { }; 4. E:/libs/boost/boost/iostreams/detail/streambuf/linked_streambuf.hpp:54: error: variable or field `close' declared void E:/libs/boost/boost/iostreams/detail/streambuf/linked_streambuf.hpp:54: error: `close' declared as a `virtual' field E:/libs/boost/boost/iostreams/detail/streambuf/linked_streambuf.hpp:54: error: expected `;' before '( ' token Fixed by including 'ios'. 5. E:/libs/boost/boost/iostreams/detail/streambuf/indirect_streambuf.hpp:377:1: warning: multi-line comment Fixed by changing to C-style comment. Not sure whether this is a problem with the code or GCC not handling the '\' in the macro definition properly. I also removed duplicate include of 'boost/iostreams/constants.hpp' in 'boost/iostreams/stream_facade.hpp'. TIA, -- Daniel Schlyder http://bitblaze.com/