On the regression tests I'm seeing lots of warnings from gcc 3.4. For example: date_time - test_greg_wstream - gcc-3.4.0-linux Compiler output: In file included from /boost/head-regression/boost/boost/config.hpp:44, from /boost/head-regression/boost/boost/date_time/locale_config.hpp:19, from /boost/head-regression/boost/boost/date_time/compiler_config.hpp:14, from /boost/head-regression/boost/boost/date_time/gregorian/gregorian.hpp:19, from ../libs/date_time/test/gregorian/testgreg_wstream.cpp:10: /boost/head-regression/boost/boost/config/stdlib/libstdcpp3.hpp:33:7: warning: #warning "Boost threading support turned on, you may need to link against -lpthread unless you define BOOST_DISABLE_THREADS when building." Lots of other libraries are seeing similar warnings with gcc 3.4. Date-time does nothing with threads so I believe based that I should just set define BOOST_DISABLE_THREADS for the test cases to resolve this. But since I'm not certain of all the implications of this I thought I'd as for advice before proceeding. One specific question that comes to mind is do I need to limit the scope to gcc so I don't break MT, dll mode on Windows? Thanks, Jeff