Boost.Python fails to build with MSVC 6.x/STLPort (see http://tinyurl.com/4nl7l) due to the following (incorrect) configuration logic in "boost/python/detail/config.hpp": // The STLport puts all of the standard 'C' library names in std (as far as the // user is concerned), but without it you need a fix if you're using MSVC or // Intel C++ # if defined(BOOST_MSVC_STD_ITERATOR) # define BOOST_CSTD_ # else # define BOOST_CSTD_ std # endif The issue, as explained in "boost/config/stdlib/stlport.hpp" is that: // STLport does a good job of importing names into namespace std::, // but doesn't always get them all, define BOOST_NO_STDC_NAMESPACE, since our // workaround does not conflict with STLports: Is there a reason why we are not using BOOST_NO_STDC_NAMESPACE here? -- Aleksey Gurtovoy MetaCommunications Engineering