C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  error LNK2019 problem          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Nicros Guest Posted: Mon Nov 28, 2005 5:51 am    Post subject: error LNK2019 problem Hi, I have a simple project, with a main application and a static library. I call a function from one of the classes in the static lib, but during compile time I get the LNK2019 problem. Strange thing is that if I call a different function there is no compile error with that one. Both public, both defined in the header and implemented in the cpp file. I have triple checked that my libraries are linked correctly... all other functions and classes are linked just fine... just this one function is a problem. Any suggestions on what it may be? Thanks Back to top John Harrison Guest Posted: Mon Nov 28, 2005 8:21 am    Post subject: Re: error LNK2019 problem Nicros wrote: Quote: Hi, I have a simple project, with a main application and a static library. I call a function from one of the classes in the static lib, but during compile time I get the LNK2019 problem. Strange thing is that if I call a different function there is no compile error with that one. Both public, both defined in the header and implemented in the cpp file. I have triple checked that my libraries are linked correctly... all other functions and classes are linked just fine... just this one function is a problem. Any suggestions on what it may be? Thanks Perhaps you have declared one function in the header and implemented a different function in the cpp file. Why not show us the code? Cut and paste it from your cpp file and header file. john Back to top Howard Guest Posted: Mon Nov 28, 2005 3:35 pm    Post subject: Re: error LNK2019 problem "John Harrison" <john_andronicus (AT) hotmail (DOT) com> wrote Quote: Nicros wrote: Hi, I have a simple project, with a main application and a static library. I call a function from one of the classes in the static lib, but during compile time I get the LNK2019 problem. Strange thing is that if I call a different function there is no compile error with that one. Both public, both defined in the header and implemented in the cpp file. I have triple checked that my libraries are linked correctly... all other functions and classes are linked just fine... just this one function is a problem. Any suggestions on what it may be? Thanks Perhaps you have declared one function in the header and implemented a different function in the cpp file. Why not show us the code? Cut and paste it from your cpp file and header file. You should also include the text of that link error. Error codes like "LNK2019" are specific to your compiler (and possibly even just that version of the compiler), and we have no way to know what it means, or to what functions or files it is referring. -Howard Back to top Nicros Guest Posted: Tue Nov 29, 2005 3:55 am    Post subject: Re: error LNK2019 problem Quote: You should also include the text of that link error. Error codes like "LNK2019" are specific to your compiler (and possibly even just that version of the compiler), and we have no way to know what it means, or to what functions or files it is referring. -Howard Here is the linker error: AutomatonViewer error LNK2019: unresolved external symbol "public: void __thiscall CSimulator::StartSimulation(class ATL::CStringT<char,class StrTraitMFC_DLL > &,class ATL::CStringT<char,class StrTraitMFC_DLL ATL::ChTraitsCRT > &)" (?StartSimulation@CSimulator@@QAEXAAV?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@0@Z) referenced in function "public: void __thiscall CAutomatonViewerDoc::OnSimulationRun(void)" (?OnSimulationRun@CAutomatonViewerDoc@@QAEXXZ) Here is the function declaration from the header for class CSimulator: void StartSimulation(CString& cstrPathInit, CString& cstrPathArchive); And from the cpp file: void CSimulator::StartSimulation(CString& cstrPathInit, CString& cstrPathArchive) { } The call: void CAutomatonViewerDoc::OnSimulationRun() { m_simulator.StartSimulation(m_cstrPathInitFile, m_cstrPathArchive); } Back to top John Harrison Guest Posted: Tue Nov 29, 2005 7:10 am    Post subject: Re: error LNK2019 problem Nicros wrote: Quote: You should also include the text of that link error. Error codes like "LNK2019" are specific to your compiler (and possibly even just that version of the compiler), and we have no way to know what it means, or to what functions or files it is referring. -Howard Here is the linker error: AutomatonViewer error LNK2019: unresolved external symbol "public: void __thiscall CSimulator::StartSimulation(class ATL::CStringT<char,class StrTraitMFC_DLL > &,class ATL::CStringT<char,class StrTraitMFC_DLL ATL::ChTraitsCRT > &)" (?StartSimulation@CSimulator@@QAEXAAV?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@0@Z) referenced in function "public: void __thiscall CAutomatonViewerDoc::OnSimulationRun(void)" (?OnSimulationRun@CAutomatonViewerDoc@@QAEXXZ) Here is the function declaration from the header for class CSimulator: void StartSimulation(CString& cstrPathInit, CString& cstrPathArchive); And from the cpp file: void CSimulator::StartSimulation(CString& cstrPathInit, CString& cstrPathArchive) { } The call: void CAutomatonViewerDoc::OnSimulationRun() { m_simulator.StartSimulation(m_cstrPathInitFile, m_cstrPathArchive); } One posssible explaination, check that the StartSimulation function is declared in the public part of the CSimulator class. Failing that, I suggest physically deleteing all the object and library files and rebuilding your entire project. And failing that post the entire code, or put it on a web site and post the link. john Back to top Howard Guest Posted: Tue Nov 29, 2005 3:25 pm    Post subject: Re: error LNK2019 problem "John Harrison" <john_andronicus (AT) hotmail (DOT) com> wrote Quote: Nicros wrote: You should also include the text of that link error. Error codes like "LNK2019" are specific to your compiler (and possibly even just that version of the compiler), and we have no way to know what it means, or to what functions or files it is referring. -Howard Here is the linker error: AutomatonViewer error LNK2019: unresolved external symbol "public: void __thiscall CSimulator::StartSimulation(class ATL::CStringT<char,class StrTraitMFC_DLL > &,class ATL::CStringT<char,class StrTraitMFC_DLL ATL::ChTraitsCRT > &)" (?StartSimulation@CSimulator@@QAEXAAV?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@0@Z) referenced in function "public: void __thiscall CAutomatonViewerDoc::OnSimulationRun(void)" (?OnSimulationRun@CAutomatonViewerDoc@@QAEXXZ) Here is the function declaration from the header for class CSimulator: void StartSimulation(CString& cstrPathInit, CString& cstrPathArchive); And from the cpp file: void CSimulator::StartSimulation(CString& cstrPathInit, CString& cstrPathArchive) { } The call: void CAutomatonViewerDoc::OnSimulationRun() { m_simulator.StartSimulation(m_cstrPathInitFile, m_cstrPathArchive); } One posssible explaination, check that the StartSimulation function is declared in the public part of the CSimulator class. Declaring that as private or protected wouldn't result in a linker error. It would result in a compile error. A better place to ask might be an MFC newsgroup. It's some project setup issue, not anything related to the C++ code itself. There's certainly nothing in that code that will tell us for sure what the problem is. (Perhaps something related to linking with that ATL namespace?) -Howard Back to top John Harrison Guest Posted: Tue Nov 29, 2005 10:02 pm    Post subject: Re: error LNK2019 problem Quote: One posssible explaination, check that the StartSimulation function is declared in the public part of the CSimulator class. Declaring that as private or protected wouldn't result in a linker error. It would result in a compile error. Not if CAutomatonViewerDoc was declared a friend of CSimulator. It was the best I could think of. john Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.