I can't build the thread library. I have no idea why. ( What gregorian date is doing in the thread lib eludes me ) I have changed boost/config/user.hpp to #define BOOST_ALL_DYN_LIN, of course, that shouldn't effect threads.... but whatever.... Anyone got a clue? C:\RTI\devroot\packages-src\boost_1_37_0>cl.exe Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.6030 for 80x86 Copyright (C) Microsoft Corporation 1984-2002. All rights reserved. usage: cl [ option... ] filename... [ /link linkoption... ] C:\RTI\devroot\packages-src\boost_1_37_0>bjam --version Boost.Build V2 (Milestone 12) Boost.Jam 03.1.17 C:\RTI\devroot\packages-src\boost_1_37_0>bjam --with-thread toolset=msvc-7.1 var iant=release link=shared WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets ...patience... ...found 716 targets... ...updating 2 targets... msvc.link.dll bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll Creating library bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.lib and object bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.exp thread.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::gregorian::greg_month::greg_month(unsigned short)" (__im p_??0greg_month@gregorian@boost@@QAE@G@Z) referenced in function "public: __thiscall boost::gregorian::date::date(enum boost::date_time::special_values)" (??0da te@gregorian@boost@@QAE@W4special_values@date_time@2@@Z) bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll : fatal error LNK1120: 1 unresolved externals call "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\vcvars32.bat" >nul link /NOLOGO /INCREMENTAL:NO /DLL /subsystem:console /out:"bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll" /IMPLIB:"bin .v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.lib" @"bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_threa d-vc71-mt-1_37.dll.rsp" if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL% if exist "bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boos t_thread-vc71-mt-1_37.dll.manifest" ( mt -nologo -manifest "bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll.manifest" "-outputresource:bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll;2" ) ...failed msvc.link.dll bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.dll bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.lib... ...removing bin.v2\libs\thread\build\msvc-7.1\release\threading-multi\boost_thread-vc71-mt-1_37.lib ...failed updating 2 targets...