Convert solution from VS2003 to VS2008

[leoalvesmachado]

Hi everyone,
I have a solution originally built in VS2003 several years ago. I need to use it now, but using VS2008. I've done the "convert projects" process, but I can't build the whole thing anymore. Here are the link errors I'm getting

1>Linking...

1>msvcprt.lib(MSVCP90.dll) : error LNK2005: "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl std::operator+<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,char const *)" (??$?HDU?$char_traits@D@std@@V?$allocator@D@1@@std@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@ABV10@PBD@Z) already defined in Classifier.lib(Classifier.obj)

1>msvcprt.lib(MSVCP90.dll) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??$?6DU?$char_traits@D@std@@V?$allocator@D@1@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@@Z) already defined in Classifier.lib(Classifier.obj)

1>msvcprt.lib(MSVCP90.dll) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z) already defined in AgeBat.obj

1>LINK : fatal error LNK1104: cannot open file 'mfc71.lib'

It seems to be searching for some libs from VS2003 (mfc71.lib). I don't know what to do to fix it. Can you help me?

thanks in advance

[S_M_A]

Seems like your original project was setup in a strange way. Either you create a new project, copy your source to that folder and add them to the new project (probably the easiest way) or you create a backup and then edit the vcproj-file(s) and remove all references to VS2003 files.

Also check that you haven't any other leftovers in the environment like INCLUDE, LIB and so on.

[leoalvesmachado]

Hi S_M_A
Thanks for your answer.
I've tried to create a new project, but I still get these errors:

1>Linking...
1>msvcprt.lib(MSVCP90.dll) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??$?6DU?$char_traits@D@std@@V?$allocator@D@1@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@@Z) already defined in Classifier.lib(Classifier.obj)
1>msvcprt.lib(MSVCP90.dll) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl std::operator<<<struct std::char_traits<char> >(class std::basic_ostream<char,struct std::char_traits<char> > &,char const *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z) already defined in AgeBat.obj
1>LINK : fatal error LNK1104: cannot open file 'mfc71.lib'

I believe I've got less errors because I've just simplified the code a little.

The project uses a set of libs from projects also built in VS2003 - I've imported all of them (they are in the same solution) and it compiled without problems in 2008 (I only got several warnings due to 'unsafe' code). Should I re-create all of the projects (it will take some time, but if it works, that's fine)? Maybe, is there anything in the project properties I'm missing?

[S_M_A]

Yes, recreate all libs as well. You shouldn't mix things linked with different versions of the runtime.

For the moment you could do as the warnings say and define (probably) _CRT_SECURE_NO_WARNINGS and _CRT_NONSTDC_NO_WARNINGS (add them in project properties - C/C++ - Preprocessor - Preprocessor Definitions) to get rid of the unsafe code warnings in case they obscure more important warnings.

Edit: Oh! You still have that reference to mfc71.lib. It seems that you have some additional cleaning to do. Could it be that there's a #pragma comment( lib, "mfc71.lib" ) somewhere in the code?

[Amleto]

you're not using express 2008 are you?