Hi fellow users, I build boost 1.43 on windows, using mingw with gcc 4.4.0: Using built-in specs. Target: mingw32 Configured with: ../gcc-4.4.0/configure --enable-languages=c,ada,c++,fortran,java,objc,obj-c++ --disable-sjlj-exceptions --enable-shared --enable-libgcj --enable-libgomp --with-dwarf2 --disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-runtime-libs --prefix=/mingw --with-gmp=/mingw/src/gmp/root --with-mpfr=/mingw/src/mpfr/root --build=mingw32 Thread model: win32 gcc version 4.4.0 (GCC) with the following command: bjam.exe install -q --layout=system --with-system --with-thread --with-python --with-serialization toolset=gcc variant=release link=static threading=multi runtime-link=static When I now build a shared library, itself linking statically the libboost_serialization.a, I get the following linker error: Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_iarchiveEEE12get_instanceEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_iarchiveEEE12is_destroyedEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_iarchiveEEE18get_const_instanceEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_iarchiveEEE20get_mutable_instanceEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_oarchiveEEE12get_instanceEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_oarchiveEEE12is_destroyedEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_oarchiveEEE18get_const_instanceEv: symbol not found Cannot export _ZN5boost13serialization9singletonINS_7archive6detail12_GLOBAL__N_ 13mapI24portable_binary_oarchiveEEE20get_mutable_instanceEv: symbol not found collect2: ld returned 1 exit status Am I missing some build step? Regards, Philipp