zeromq4.1.5 library be generated compile error on VS2008

[skyformat99]

Operation steps:

1. download zeromq4.1.5.zip, unpack it
2. use vs2008 and open libzmq.sln
3. try to build .... link error be generated:

_Error 2 error LNK2019: unresolved external symbol "public: __thiscall zmq::socks_connecter_t::socks_connecter_t(class zmq::io_thread_t *,class zmq::session_base_t *,struct zmq::options_t const &,struct zmq::address_t *,struct zmq::address_t *,bool)" (??0socks_connecter_t@zmq@@QAE@PAVio_thread_t@1@PAVsession_base_t@1@ABUoptions_t@1@PAUaddress_t@1@3_N@Z) referenced in function "private: void _thiscall zmq::session_base_t::start_connecting(bool)" (?start_connecting@session_base_t@zmq@@AAEX_N@Z) session_base.obj