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linker errors

Posted on 2010-11-17
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Last Modified: 2012-06-27
Hi Experts,
I'm converting an MFC project written in VS2008 to VS2010 - I'm getting loads of linker errors:

3>cppunitd.lib(TextTestRunner.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(int)" (__imp_?width@ios_base@std@@QAEHH@Z) referenced in function "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> > &,charconst *)" (??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z)
3>cppunitd.lib(CompilerOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(int)" (__imp_?width@ios_base@std@@QAEHH@Z)
3>cppunitd.lib(TextOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(int)" (__imp_?width@ios_base@std@@QAEHH@Z)
3>cppunitd.lib(TextTestProgressListener.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(int)" (__imp_?width@ios_base@std@@QAEHH@Z)
3>cppunitd.lib(TextTestRunner.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,int)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z) referenced in function "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)
3>cppunitd.lib(CompilerOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,int)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z)
3>cppunitd.lib(TextOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,int)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z)
3>cppunitd.lib(TextTestProgressListener.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,int)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z)
3>cppunitd.lib(TextTestRunner.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(void)const " (__imp_?width@ios_base@std@@QBEHXZ) referenced in function "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)
3>cppunitd.lib(CompilerOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(void)const " (__imp_?width@ios_base@std@@QBEHXZ)
3>cppunitd.lib(TextOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(void)const " (__imp_?width@ios_base@std@@QBEHXZ)
3>cppunitd.lib(TextTestProgressListener.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall std::ios_base::width(void)const " (__imp_?width@ios_base@std@@QBEHXZ)
3>cppunitd.lib(TextTestRunner.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Lock(void)" (__imp_?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEXXZ) referenced in function "public: __thiscall std::basic_ostream<char,struct std::char_traits<char> >::_Sentry_base::_Sentry_base(class std::basic_ostream<char,struct std::char_traits<char> > &)" (??0_Sentry_base@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAE@AAV12@@Z)
3>cppunitd.lib(CompilerOutputter.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::_Lock(void)" (__imp_?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEXXZ)

They are all problems with linking to the std library...  Not sure why they are not being found...
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Question by:thready
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Accepted Solution

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TommySzalapski earned 500 total points
ID: 34157686
You could be missing a #include or a 'using namespace std'
Post your code and we'll help you sort through it.
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Author Comment

by:thready
ID: 34158348
It's a solution with 45 projects in it...  Not sure where to start  ;-)

But it's compiling fine - it's just the linker....  It can't be a #include or a using clause if it's at the link stage right?
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Assisted Solution

by:TommySzalapski
TommySzalapski earned 500 total points
ID: 34158397
Yes, I believe so. Did the conversion Wizard list any errors?
I'd start with TextTestRunner, CompilerOutputter, TextTestProgressListener, and TextOutputter since those were the ones mentioned.
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Author Comment

by:thready
ID: 34158422
But those are not my projects - not even sure where they come from or what they're for...
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by:thready
ID: 34158436
Aha!  It was my test project - it uses unit testing...  Builds when I unload the test project......
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Expert Comment

by:TommySzalapski
ID: 34158442
Cool. Nice shirt, by the way. I like the color.
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Author Comment

by:thready
ID: 34158453
lmao
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Expert Comment

by:TommySzalapski
ID: 34765538
If you look at the times on the threads it is clear that http:a#34158397 gave the asker the information which lead to the solution. It pointed out the source of the errors and was therefore part of the solution.
That one and http:a#34158436 (the asker's post) provide the complete solution to this post.
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Author Closing Comment

by:thready
ID: 34765570
Apologies for not giving points sooner.
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