I'm still getting undefined symbols attempting to use date_time library with Visual Studio.NET 2003
Works fine for me with current cvs-release-branch. Can you try: 1) define BOOST_LIB_DIAGNOSTIC and verify that the name of the date_time lib that will be linked to gets printed out. 2) If that fails, pre-process the source and verify that boost/config/auto_link.hpp is getting included. 3) If it's not then why not? Are you defining BOOST_ALL_NO_LIB or BOOST_DATE_TIME_NO_LIB ? Are your include paths correctly set up? However I do see some pesky warnings from vc7.1 that Jeff may want to try and suppress in future (reproduced below). John. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Compiling... scrap.cpp c:\data\boost\release\boost\boost\date_time\posix_time\conversion.hpp(26) : warning C4244: 'argument' : conversion from 'time_t' to 'long', possible loss of data c:\data\boost\release\boost\boost\date_time\time_system_counted.hpp(57) : warning C4244: 'initializing' : conversion from 'boost::date_time::counted_time_rep<config>::int_type' to 'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::date_i nt_type', possible loss of data with [ config=boost::posix_time::millisec_posix_time_system_config ] and [ ymd_type_=boost::gregorian::greg_year_month_day, date_int_type_=boost::date_time::int_adapter<unsigned long>::int_type ] c:\data\boost\release\boost\boost\date_time\time_system_counted.hpp(52) : while compiling class-template member function 'boost::date_time::counted_time_rep<config>::date_type boost::date_time::counted_time_rep<config>::date(void) const' with [ config=boost::posix_time::millisec_posix_time_system_config ] c:\data\boost\release\boost\boost\date_time\time_system_counted.hpp(111) : see reference to class template instantiation 'boost::date_time::counted_time_rep<config>' being compiled with [ config=boost::posix_time::millisec_posix_time_system_config ] c:\data\boost\release\boost\boost\date_time\time.hpp(52) : see reference to class template instantiation 'boost::date_time::counted_time_system<time_rep>' being compiled with [ time_rep=boost::posix_time::int64_time_rep ] c:\data\boost\release\boost\boost\date_time\posix_time\ptime.hpp(32) : see reference to class template instantiation 'boost::date_time::base_time<T,time_system>' being compiled with [ T=boost::posix_time::ptime, time_system=boost::posix_time::posix_time_system ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4511: 'boost::detail::lexical_stream<Target,Source>' : copy constructor could not be generated with [ Target=unsigned short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=unsigned short, Source=std::string ] c:\data\boost\release\boost\boost\date_time\date_parsing.hpp(106) : see reference to function template instantiation 'Target boost::lexical_cast<unsigned short,Type>(Source)' being compiled with [ Target=unsigned short, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\date_time\gregorian\parsers.hpp(24) : see reference to function template instantiation 'date_type boost::date_time::parse_date<boost::gregorian::date>(const std::string &,int)' being compiled with [ date_type=boost::gregorian::date ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4512: 'boost::detail::lexical_stream<Target,Source>' : assignment operator could not be generated with [ Target=unsigned short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4511: 'boost::detail::lexical_stream<Target,Source>' : copy constructor could not be generated with [ Target=int, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=int, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(42) : see reference to function template instantiation 'Target boost::lexical_cast<int,Type>(Source)' being compiled with [ Target=int, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\date_time\posix_time\time_parsers.hpp(27) : see reference to function template instantiation 'time_duration boost::date_time::parse_delimited_time_duration<boost::posix_time::time_dura tion>(const std::string &)' being compiled with [ time_duration=boost::posix_time::time_duration ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4512: 'boost::detail::lexical_stream<Target,Source>' : assignment operator could not be generated with [ Target=int, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4511: 'boost::detail::lexical_stream<Target,Source>' : copy constructor could not be generated with [ Target=boost::int64_t, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=boost::int64_t, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(59) : see reference to function template instantiation 'Target boost::lexical_cast<boost::int64_t,Type>(Source)' being compiled with [ Target=boost::int64_t, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4512: 'boost::detail::lexical_stream<Target,Source>' : assignment operator could not be generated with [ Target=boost::int64_t, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(131) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(127) : while compiling class-template member function 'boost::detail::lexical_stream<Target,Source>::lexical_stream(void)' with [ Target=unsigned short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=unsigned short, Source=std::string ] c:\data\boost\release\boost\boost\date_time\date_parsing.hpp(106) : see reference to function template instantiation 'Target boost::lexical_cast<unsigned short,Type>(Source)' being compiled with [ Target=unsigned short, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(133) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(131) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(127) : while compiling class-template member function 'boost::detail::lexical_stream<Target,Source>::lexical_stream(void)' with [ Target=int, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=int, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(42) : see reference to function template instantiation 'Target boost::lexical_cast<int,Type>(Source)' being compiled with [ Target=int, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(133) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(131) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(127) : while compiling class-template member function 'boost::detail::lexical_stream<Target,Source>::lexical_stream(void)' with [ Target=boost::int64_t, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=boost::int64_t, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(59) : see reference to function template instantiation 'Target boost::lexical_cast<boost::int64_t,Type>(Source)' being compiled with [ Target=boost::int64_t, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(133) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(139) : warning C4100: 'wd' : unreferenced formal parameter c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(140) : while compiling class-template member function 'void boost::date_time::date_names_put<Config>::do_put_weekday_short(boost::date_t ime::date_names_put<Config>::iter_type &,boost::date_time::date_names_put<Config>::weekday_enum) const' with [ Config=boost::gregorian::greg_facet_config ] c:\data\boost\release\boost\boost\date_time\date_formatting_locales.hpp(219) : see reference to class template instantiation 'boost::date_time::date_names_put<Config>' being compiled with [ Config=boost::gregorian::greg_facet_config ] c:\data\boost\release\boost\boost\date_time\date_formatting_locales.hpp(210) : while compiling class-template member function 'void boost::date_time::ostream_date_formatter<date_type,facet_type,charT>::date_p ut(const date_type &,boost::date_time::ostream_date_formatter<date_type,facet_type,charT>::ostr eam_type &)' with [ date_type=boost::gregorian::date, facet_type=boost::gregorian::greg_base_facet, charT=char ] c:\data\boost\release\boost\boost\date_time\gregorian\greg_facet.hpp(48) : see reference to class template instantiation 'boost::date_time::ostream_date_formatter<date_type,facet_type,charT>' being compiled with [ date_type=boost::gregorian::date, facet_type=boost::gregorian::greg_base_facet, charT=char ] c:\data\boost\release\boost\boost\date_time\time_formatting_streams.hpp(76) : see reference to function template instantiation 'std::basic_ostream<_Elem,_Traits> &boost::gregorian::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const boost::gregorian::date &)' being compiled with [ _Elem=char, _Traits=std::char_traits<char> ] c:\data\boost\release\boost\boost\date_time\time_formatting_streams.hpp(74) : while compiling class-template member function 'void boost::date_time::ostream_time_formatter<time_type,charT>::time_put(const time_type &,boost::date_time::ostream_time_formatter<time_type,charT>::ostream_type &)' with [ time_type=boost::posix_time::ptime, charT=char ] c:\data\boost\release\boost\boost\date_time\posix_time\time_formatters.hpp(2 26) : see reference to class template instantiation 'boost::date_time::ostream_time_formatter<time_type,charT>' being compiled with [ time_type=boost::posix_time::ptime, charT=char ] \data\boost\develop\boost\msvc\regex\scrap\scrap.cpp(14) : see reference to function template instantiation 'std::basic_ostream<_Elem,_Traits> &boost::posix_time::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const boost::posix_time::ptime &)' being compiled with [ _Elem=char, _Traits=std::char_traits<char> ] c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(139) : warning C4100: 'oitr' : unreferenced formal parameter c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(142) : warning C4100: 'wd' : unreferenced formal parameter c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(143) : while compiling class-template member function 'void boost::date_time::date_names_put<Config>::do_put_weekday_long(boost::date_ti me::date_names_put<Config>::iter_type &,boost::date_time::date_names_put<Config>::weekday_enum) const' with [ Config=boost::gregorian::greg_facet_config ] c:\data\boost\release\boost\boost\date_time\date_names_put.hpp(142) : warning C4100: 'oitr' : unreferenced formal parameter c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4511: 'boost::detail::lexical_stream<Target,Source>' : copy constructor could not be generated with [ Target=short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=short, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(138) : see reference to function template instantiation 'Target boost::lexical_cast<short,Type>(Source)' being compiled with [ Target=short, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(172) : see reference to function template instantiation 'time_duration boost::date_time::parse_undelimited_time_duration<time_duration>(const std::string &)' being compiled with [ time_duration=time_duration ] c:\data\boost\release\boost\boost\date_time\posix_time\time_parsers.hpp(35) : see reference to function template instantiation 'time_type boost::date_time::parse_iso_time<boost::posix_time::ptime>(const std::string &,char)' being compiled with [ time_type=boost::posix_time::ptime ] c:\data\boost\release\boost\boost\lexical_cast.hpp(180) : warning C4512: 'boost::detail::lexical_stream<Target,Source>' : assignment operator could not be generated with [ Target=short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(131) : warning C4127: conditional expression is constant c:\data\boost\release\boost\boost\lexical_cast.hpp(127) : while compiling class-template member function 'boost::detail::lexical_stream<Target,Source>::lexical_stream(void)' with [ Target=short, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(186) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=short, Source=std::string ] c:\data\boost\release\boost\boost\date_time\time_parsing.hpp(138) : see reference to function template instantiation 'Target boost::lexical_cast<short,Type>(Source)' being compiled with [ Target=short, Type=std::string, Source=std::string ] c:\data\boost\release\boost\boost\lexical_cast.hpp(133) : warning C4127: conditional expression is constant Linking... Build log was saved at "file://c:\data\boost\develop\boost\Vs7\Scrap\Debug\BuildLog.htm" scrap - 0 error(s), 22 warning(s) ---------------------- Done ---------------------- Rebuild All: 1 succeeded, 0 failed, 0 skipped