[Boost-users] Building boost::system

Hi, Since the new update of boost::asio, I need to build boost::system. I built it using bjam in the boost/system/build directory, and it built: boost_system_vc80-gd-1_34_1.lib but my compiler needs: libboost_system-vc80-mt-gd-1_34_1.lib I'm not sure what the difference between the boost and libboost version, but I know the mt is multithreaded.... Can anyone advise? Thanks Si