Hi, I have compiled the boost library for VC7.1 with STL_PORT using the following command line arguments: bjam -"sTOOLS=vc-7_1-stlport" --prefix=C:\Boost\temp install Everything went fine after I have exported the STLPORT_PATH. I create a simple project, code is generated for dynamic runtime lib with the multithreaded option. I can easily compile the example program from http://www.boost.org/libs/filesystem/example/simple_ls.cpp The compile options are /O2 /I "c:\vendor_libs\VC71\include\stlport" /D "_WINDOWS" /D "_DEBUG" /D "WIN32" /D "HAVE_STLPORT" /D "_STLP_DEBUG" /D "_MBCS" /FD /EHsc /MDd /GS /GR /YX"stdafx.h" /Fp"Release/Threading.pch" /Fo"Release/" /Fd"Release/vc70.pdb" /W3 /nologo /c /Wp64 /Zi /TP and the linker is invoked with /VERBOSE:LIB /OUT:"Release/Threading.exe" /INCREMENTAL /NOLOGO /LIBPATH:"c:\vendor_libs\VC71\include\stlport\..\..\lib" /LIBPATH:"C:\vendor_libs\VC71\lib\boost\VC7_STLPORT" /DEBUG /PDB:"Release/Threading.pdb" /SUBSYSTEM:CONSOLE /OPT:NOREF /OPT:NOICF /MACHINE:X86 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib The link error I am getting is: Linking... Searching libraries Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\kernel32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\user32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\gdi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\winspool.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\comdlg32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\advapi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\shell32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\ole32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\oleaut32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\uuid.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbc32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbccp32.lib: Searching c:\vendor_libs\VC71\include\stlport\..\..\lib\stlport_vc71_stldebug.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\msvcprtd.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\MSVCRTD.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\OLDNAMES.lib: Searching C:\vendor_libs\VC71\lib\boost\VC7_STLPORT\libboost_filesystem-vc71-mt-gd p-1_33_1.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\kernel32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\user32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\gdi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\winspool.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\comdlg32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\advapi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\shell32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\ole32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\oleaut32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\uuid.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbc32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbccp32.lib: Searching c:\vendor_libs\VC71\include\stlport\..\..\lib\stlport_vc71_stldebug.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\msvcprtd.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\MSVCRTD.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\OLDNAMES.lib: Searching C:\vendor_libs\VC71\lib\boost\VC7_STLPORT\libboost_filesystem-vc71-mt-gd p-1_33_1.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\kernel32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\user32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\gdi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\winspool.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\comdlg32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\advapi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\shell32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\ole32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\oleaut32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\uuid.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbc32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbccp32.lib: Searching c:\vendor_libs\VC71\include\stlport\..\..\lib\stlport_vc71_stldebug.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\msvcprtd.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\MSVCRTD.lib: Finished searching libraries Searching libraries Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\kernel32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\user32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\gdi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\winspool.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\comdlg32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\advapi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\shell32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\ole32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\oleaut32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\uuid.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbc32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbccp32.lib: Searching c:\vendor_libs\VC71\include\stlport\..\..\lib\stlport_vc71_stldebug.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\msvcprtd.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\MSVCRTD.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\OLDNAMES.lib: Searching C:\vendor_libs\VC71\lib\boost\VC7_STLPORT\libboost_filesystem-vc71-mt-gd p-1_33_1.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\kernel32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\user32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\gdi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\winspool.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\comdlg32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\advapi32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\shell32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\ole32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\oleaut32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\uuid.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbc32.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\lib\odbccp32.lib: Searching c:\vendor_libs\VC71\include\stlport\..\..\lib\stlport_vc71_stldebug.lib: Searching C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\msvcprtd.lib: Finished searching libraries main.obj : error LNK2019: unresolved external symbol "public: class _STL::basic_string __thiscall boost::filesystem::path::leaf(void)const " (?leaf@path@filesystem@boost@@QBE?AV?$basic_string@DV?$char_traits@D@_ST L@@V?$allocator@D@2@@_STL@@XZ) referenced in function _main main.obj : error LNK2019: unresolved external symbol "public: class _STL::basic_string __thiscall boost::filesystem::path::native_directory_string(void)const " (?native_directory_string@path@filesystem@boost@@QBE?AV?$basic_string@DV ?$char_traits@D@_STL@@V?$allocator@D@2@@_STL@@XZ) referenced in function _main main.obj : error LNK2019: unresolved external symbol "public: class _STL::basic_string __thiscall boost::filesystem::path::native_file_string(void)const " (?native_file_string@path@filesystem@boost@@QBE?AV?$basic_string@DV?$cha r_traits@D@_STL@@V?$allocator@D@2@@_STL@@XZ) referenced in function _main main.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::filesystem::path::path(char const *,bool (__cdecl*)(class _STL::basic_string const &))" (??0path@filesystem@boost@@QAE@PBDP6A_NABV?$basic_string@DV?$char_traits @D@_STL@@V?$allocator@D@2@@_STL@@@Z@Z) referenced in function _main main.obj : error LNK2019: unresolved external symbol "bool __cdecl boost::filesystem::native(class _STL::basic_string const &)" (?native@filesystem@boost@@YA_NABV?$basic_string@DV?$char_traits@D@_STL@ @V?$allocator@D@2@@_STL@@@Z) referenced in function _main Release/Threading.exe : fatal error LNK1120: 5 unresolved externals Build log was saved at "file://h:\Visual Studio Projects\Threading\Threading\Release\BuildLog.htm" Threading - 6 error(s), 0 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped This does not happen if I compile and link the program without STL_PORT with proper boost complied bundle. Can anyone help me with this issiue? Thanks Pshemek Kind regards Pshemek Przemyslaw Sliwa Global Foreign Exchange FX Risk Engine Development Merrill Lynch ( +44 (0)20 7995 4182 ) +44 (0)79 6325 2319 * Email: przemyslaw_sliwa@ml.com -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------