[boost] 1.31.0 date_time and VC7.1

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2004-02-02 11:18:01

I'm still getting undefined symbols attempting to use date_time library 
with Visual Studio.NET 2003

Since the program is so short to demonstrate the problem, I include it here:
==================================================================
#include <iostream >
#include <string>
#include "boost/date_time/posix_time/posix_time.hpp"

int main()
{
     boost::posix_time::ptime now = 
boost::posix_time::second_clock::universal_time();
     boost::posix_time::ptime 
cnow(boost::posix_time::second_clock::universal_time());
     std::string xx = to_iso_string(now);
     std::cout << 
to_iso_string(boost::posix_time::second_clock::universal_time()) << std::endl;
     std::cout << now << std::endl;
     std::cout << xx << std::endl;
     std::cout << to_iso_string(cnow) << std::endl;
     return 0;
}
==================================================================
produces the following output:
------ Build started: Project: OneLineDateTime, Configuration: Debug Win32 
------

Linking...
OneLineDateTime.obj : error LNK2019: unresolved external symbol "public: 
char const * __thiscall 
boost::gregorian::greg_month::as_long_string(void)const " 
(?as_long_string_at_greg_month_at_gregorian@boost@@QBEPBDXZ) referenced in 
function "public: static class std::basic_ostream<char,struct 
std::char_traits<char> > & __cdecl boost::date_time::month_formatter<class 
boost::gregorian::greg_month,class 
boost::date_time::iso_format>::format_month(class 
boost::gregorian::greg_month const &,class std::basic_ostream<char,struct 
std::char_traits<char> > &)" 
(?format_month@?$month_formatter_at_Vgreg_month_at_gregorian@boost@@Viso_format_at_date_time_at_3@@date_time_at_boost@@SAAAV?$basic_ostream_at_DU?$char_traits_at_D@std@@@std@@ABVgreg_month_at_gregorian@3_at_AAV45@@Z)
OneLineDateTime.obj : error LNK2019: unresolved external symbol "public: 
char const * __thiscall 
boost::gregorian::greg_month::as_short_string(void)const " 
(?as_short_string_at_greg_month_at_gregorian@boost@@QBEPBDXZ) referenced in 
function "public: static class std::basic_ostream<char,struct 
std::char_traits<char> > & __cdecl boost::date_time::month_formatter<class 
boost::gregorian::greg_month,class 
boost::date_time::iso_format>::format_month(class 
boost::gregorian::greg_month const &,class std::basic_ostream<char,struct 
std::char_traits<char> > &)" 
(?format_month@?$month_formatter_at_Vgreg_month_at_gregorian@boost@@Viso_format_at_date_time_at_3@@date_time_at_boost@@SAAAV?$basic_ostream_at_DU?$char_traits_at_D@std@@@std@@ABVgreg_month_at_gregorian@3_at_AAV45@@Z)
Debug/OneLineDateTime.exe : fatal error LNK1120: 2 unresolved externals

Build log was saved at 
"file://c:\Projects\Programming\SeriousTesting\OneLineDateTime\Debug\BuildLog.htm"
OneLineDateTime - 3 error(s), 0 warning(s)

---------------------- Done ----------------------

     Build: 0 succeeded, 1 failed, 0 skipped

Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"