Hi, I've been happily using Boost 1.32 with Visual C++ 7.1 for a few months. Now I'd like to switch to STLPort, but can’t get my project to compile with STLPort due to linker errors (LNK2019 and LNK2001) in every boost library I use (signals, filesystem, thread). First I installed STLPort and to make sure that it is working properly with a dummy (boostless) project. Then I re-compiled boost with the stlport toolset: bjam "-sTOOLS=vc-7_1-stlport" "-sSTLPORT_PATH=C:\Programme\Microsoft Visual Studio .NET 2003\add-ons" "-sSTLPORT_VERSIONS=4.6.1" "-sPYTHON_ROOT=c:/Programme/Python24" install Last but not least, I recompiled my project (multithreaded, static runtime) which is using boost. I got 9 errors such as these: WxNonogram error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::signal_base::signal_base(class boost::function2<bool,class boost::any,class boost::any,class _STL::allocator<class boost::function_base> > const &,class boost::any const &)" (??0signal_base@detail@signals@boost@@QAE@ABV?$function2@_NVany@boost@@V12@V?$allocator@Vfunction_base@boost@@@_STL@@@3@ABVany@3@@Z) WxNonogram error LNK2019: unresolved external symbol "bool __cdecl boost::filesystem::native(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > const &)" (?native@filesystem@boost@@YA_NABV?$basic_string@DV?$char_traits@D@_STL@@V?$allocator@D@2@@_STL@@@Z) referenced in function "public: virtual bool __thiscall CMyWxApp3_wxstaticApp::OnInit(void)" (?OnInit@CMyWxApp3_wxstaticApp@@UAE_NXZ) I also defined BOOST_LIB_DIAGNOSTIC to see which libraries are linked against to. Strangely enough, it seems to link to the correct libraries as I got messages such as these: "Linking to lib file: libboost_signals-vc71-mt-sgdp-1_32.lib" and it still complains about signals not being resolved after linking. Unfortunately I do not have a clue on how to proceed. Any help would be appreciated. Thanks! :-) - Adrian