Experts, I am getting below linker error on gzip compressor usage. Any help is highly appreciated. I have already tried linking boost_iostreams.lib & zlib.lib Code Description LNK2001 unresolved external symbol "int const boost::iostreams::zlib::default_compression" (?default_compression@zlib@iostreams@boost@@3HB) & Code Description LNK2019 unresolved external symbol "protected: __cdecl boost::iostreams::detail::zlib_base::~zlib_base(void)" (??1zlib_base@detail@iostreams@boost@@IEAA@XZ) referenced in function "int `public: __cdecl boost::iostreams::detail::zlib_compressor_impl<class std::allocator<char> >::zlib_compressor_impl<class std::allocator<char> >(struct iostreams::detail::zlib_params const &)'::`1'::dtor$0" (?dtor$0@?0???0?$zlib_compressor_impl@V?$allocator@D@std@@@detail@iostreams@boost@@QEAA@AEBUzlib_params@23@@Z@4HA) Regards, UJ