I'm including the serialization library in the library I'm building. It compiles without errors but produces a lot of warning (~1600): serialization/base_object.hpp:136:57: warning: "__MWERKS__" is not defined serialization/base_object.hpp:147:60: warning: "__BORLANDC__" is not defined archive/basic_xml_iarchive.hpp:41:41: warning: "BOOST_MSVC" is not defined archive/basic_text_oprimitive.hpp:29:51: warning: "BOOST_DINKUMWARE_STDLIB" is not defined I'm building on a mac (10.4.6, intel), and the header file in which I'm including the serialization stuff looks like this: #include <string> #include <sstream> #include <boost/archive/tmpdir.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> Any help appreciated Thanks, Olivier Destrebecq olivierd@real.com