Take the following simple use of serialization: //=============================================== #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/string.hpp> #include <fstream> #include <assert.h> class Defs { public: Defs(const std::string& f) : fileName_(f) {} Defs() {} bool operator==(const Defs& rhs) const { return fileName_ == rhs.fileName_;} const std::string& fileName() { return fileName_;} private: std::string fileName_; friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /*version*/) { ar & fileName_; } }; int main() { Defs saveDefs("saveFile.txt"); { // Save the defs file std::ofstream ofs( saveDefs.fileName().c_str() ); boost::archive::text_oarchive oa( ofs ); oa << saveDefs; } { // Restore the defs file Defs loadDefs; std::ifstream ifs(saveDefs.fileName().c_str()); boost::archive::text_iarchive ia(ifs); ia >> loadDefs; assert( saveDefs == loadDefs ); } return 0; } //=============================================== This produces the following messages from the AIX v10.1 compiler. vacpp.compile.c++ bin/vacpp/debug/src/TestSerialisation.o "/s1a/emos_esuite/emos_data/sms/boost_1_39_0/boost/archive/detail/oserializer.hpp", line 538.5: 1540-2400 (W) "boost::serialization::STATIC_WARNING" is undefined. The delete operator will not call a destructor. "/s1a/emos_esuite/emos_data/sms/boost_1_39_0/boost/archive/detail/oserializer.hpp", line 530.13: 1540-0700 (I) The previous message was produced while processing "boost::archive::save<boost::archive::text_oarchive,Defs>(text_oarchive &, Defs &)". "/s1a/emos_esuite/emos_data/sms/boost_1_39_0/boost/archive/detail/common_oarchive.hpp", line 64.9: 1540-0700 (I) The previous message was produced while processing "boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<Defs>(Defs &, int)". "/s1a/emos_esuite/emos_data/sms/boost_1_39_0/boost/archive/basic_text_oarchive.hpp", line 75.13: 1540-0700 (I) The previous message was produced while processing "boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<Defs>(Defs &, int)". "/s1a/emos_esuite/emos_data/sms/boost_1_39_0/boost/archive/detail/interface_oarchive.hpp", line 64.21: 1540-0700 (I) The previous message was produced while processing "boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<< <Defs>(Defs &)" Does anyone know if the boost serialisation library is still actively maintained on this compiler ? Best regards, Ta, Avi