date-time has a number of regession test failures when it is built in the dll mode on windows. They look like this: C:\Progra~1\Comeau\4_3_3\bin\como --vc7 -c -e5 --no_version --no_prelink_verbose --display_error_number --long_long --diag_suppress=9,21,161,748,940,962 -D__STL_LONG_LONG -DBOOST_DATE_TIME_POSIX_TIME_STD_CONFIG -DBOOST_ALL_DYN_LINK=1 --a --no_inlining /Zi /Od -D_WIN32 --exceptions -DBOOST_DISABLE_WIN32 --wchar_t -I"C:\Users\Administrator\boost\main\results\bin\boost\libs\date_time\build" -I"C:\Users\Administrator\boost\main\boost" -I"C:\Progra~1\Comeau\4_3_3\libcomo" -I"C:\Progra~1\Comeau\4_3_3\libcomo\cnames" -o "C:\Users\Administrator\boost\main\results\bin\boost\libs\date_time\build\boost_date_time.dll\meta-como-win32-4.3.3-vc7\debug\greg_month.obj" "C:\Users\Administrator\boost\main\boost\libs\date_time\build\../src/gregorian/greg_month.cpp" "C:\Users\Administrator\boost\main\boost\boost/date_time/gregorian/greg_month.hpp", line 55: error #70: incomplete type is not allowed class BOOST_DATE_TIME_DECL greg_month : public greg_month_rep { ^ Which looks like it is complaining about the BOOST_DATE_TIME_DECL macro. I'm wondering if in config/platform/win32.hpp we need to at como to this little macro that controls the definition of BOOST_HAS_DECLSPEC. #if !defined(__GNUC__) && !defined(BOOST_HAS_DECLSPEC) # define BOOST_HAS_DECLSPEC #endif I've never used this compiler -- anyone out there know how it handles dll symbol export on win32? Jeff