I've been trying out the task library from the vault and have found a few issues. The code does not compile with MSVC 7.1; this appears to be a compiler non-conforming issue rather than code error: The contained impl_pool class inside detail::worker requires access to the static pool class, but even though the detail::worker class is a friend, VC7 doesn't allow impl_pool access. Adding: template< typename Pool > friend class detail::worker::impl_pool; to the class in static_pool.hpp gets around this. <> I believe there is another error in the task config.hpp file; it has the line: # if defined(BOOST_TASK_DYN_DLL) || defined(BOOST_ALL_DYN_LINK) I believe BOOST_TASK_DYN_DLL should be BOOST_TASK_DYN_LINK, following the guide from the main boost config.