Hallo, I need help compiling boost. My setup: Windows SDK v7.0 Boost 1.45 My configuration: bjam --prefic=c:\boost --with-thread --with-system --with-filesystem --with-program_options --with-date_time link=shared threading=multi address-model=64 runtime-link=shared toolset=msvc stage in boost/config/user.hpp I activated #define BOOST_ALL_DYN_LINK Linking fails with: thread.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl boost::gregorian::greg_month::greg_month(unsigned short)" (__imp_??0greg_month@gregorian@boost@@QEAA@G@Z) referenced in function "public: __cdecl boost::gregorian::date::date(enum boost::date_time::special_values)" (??0date@gregorian@boost@@QEAA@W4special_values@date_time@2@@Z) bin.v2\libs\thread\build\msvc-9.0\release\address-model-64\threading-multi\boost_thread-vc90-mt-1_45.dll : fatal error LNK1120: 1 unresolved externals Thanks!