[Boost-users] strong_typedef

Hi everyone. Is obsolete? Compiling this code: // -- cut --- #include #include // -- cut --- gives: 1>E:\Libraries\boost\boost/serialization/strong_typedef.hpp(45): warning C4005: 'BOOST_STRONG_TYPEDEF' : macro redefinition 1> E:\Libraries\boost\boost/strong_typedef.hpp(45) : see previous definition of 'BOOST_STRONG_TYPEDEF' Does one need to use instead?