Solved: Sorry, I meant in

Chandler__Gavin · ‎05-31-2018

Hi all,

I recently started working on a project that was build roughly 15 years ago. It uses a Visual C++, and visual fortran compiled in CVF. Currently, there are two projects in one solution. The C++ code is the main project that is dependent on the fortran code in a static library. I am on Windows 10, using Visual studio 2013 professional, and using Intel Visual Fortran 2017.

The issue is that there are references to DFOR.lib in the project properties for the C++ project in the linker command line (/defaultlib:"dfor.lib"), but it gives the error dfor.lib cannot be opened and when removed, there are a series of unresolved external symbols.

Error   6   error LNK2001: unresolved external symbol "public: class ATL::CStringT<char,class StrTraitMFC<char,class ATL::ChTraitsCRT<char> > > __thiscall petMove::toString(void)" (?toString@petMove@@QAE?AV?$CStringT@DV?$StrTraitMFC@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@XZ) C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureView.obj    Power Network Capture
Error   23  error LNK2019: unresolved external symbol "protected: __thiscall CZoomView::CZoomView(void)" (??0CZoomView@@IAE@XZ) referenced in function "protected: __thiscall CPowerNetworkCaptureView::CPowerNetworkCaptureView(void)" (??0CPowerNetworkCaptureView@@IAE@XZ)   C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureView.obj    Power Network Capture
Error   24  error LNK2019: unresolved external symbol "protected: virtual __thiscall CZoomView::~CZoomView(void)" (??1CZoomView@@MAE@XZ) referenced in function "public: virtual __thiscall CPowerNetworkCaptureView::~CPowerNetworkCaptureView(void)" (??1CPowerNetworkCaptureView@@UAE@XZ)    C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureView.obj    Power Network Capture
Error   7   error LNK2019: unresolved external symbol "public: __thiscall CDialogCurrentPhasor::CDialogCurrentPhasor(class CWnd *)" (??0CDialogCurrentPhasor@@QAE@PAVCWnd@@@Z) referenced in function "public: void __thiscall CCurrentPhasor::SEDialogHandler(void)" (?SEDialogHandler@CCurrentPhasor@@QAEXXZ) C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureDoc.obj Power Network Capture
Error   5   error LNK2019: unresolved external symbol "public: class ATL::CStringT<char,class StrTraitMFC<char,class ATL::ChTraitsCRT<char> > > __thiscall petMove::toString(void)" (?toString@petMove@@QAE?AV?$CStringT@DV?$StrTraitMFC@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@XZ) referenced in function "public: int __thiscall CPowerNetworkCaptureDoc::PushMove(class petMove *)" (?PushMove@CPowerNetworkCaptureDoc@@QAEHPAVpetMove@@@Z)  C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureDoc.obj Power Network Capture
Error   22  error LNK2019: unresolved external symbol "public: unsigned int __thiscall petMove::getPartType(void)" (?getPartType@petMove@@QAEIXZ) referenced in function "protected: void __thiscall CPowerNetworkCaptureView::OnChar(unsigned int,unsigned int,unsigned int)" (?OnChar@CPowerNetworkCaptureView@@IAEXIII@Z)    C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureView.obj    Power Network Capture
Error   14  error LNK2019: unresolved external symbol "public: virtual __thiscall CDialogRunAnalysisFromFilePF::~CDialogRunAnalysisFromFilePF(void)" (??1CDialogRunAnalysisFromFilePF@@UAE@XZ) referenced in function "protected: void __thiscall CPowerNetworkCaptureDoc::OnAnalysisRunFromFilePF(void)" (?OnAnalysisRunFromFilePF@CPowerNetworkCaptureDoc@@IAEXXZ)    C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\Power Network CaptureDoc.obj Power Network Capture
Error   3   error LNK2019: unresolved external symbol _HtmlHelpW@16 referenced in function "protected: void __thiscall CMainFrame::OnHtmlHelp(void)" (?OnHtmlHelp@CMainFrame@@IAEXXZ)   C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Pet_Gavin\pet_neda\MainFrm.obj  Power Network Capture

I have tried to rebuild the solution. The fortran library compiles without any errors but the C++ project does not. I am new to working with Visual Studio and linking libraries so I do not know if this is an issue with a missing library that has replaced DFOR.lib or if the C++ project should generate the links automatically. I also noticed that for my fortran static library Configuration Properties< Fortran < External Procedures < Calling Convention was set to CVF (/iface:cvf). I tried setting this to default but I saw no immediate results.

Also I have tried to rebuild the solution from the source code but I am inexperienced with that and the solution is quite large. One issue I am having is that the fortran files are now compiling with errors when they did not previously.

Error	2	 error #6633: The type of the actual argument differs from the type of the dummy argument.   [WS]	C:\Users\Gavin\Desktop\College stuff\1st year (Fresher)\Ali Abur Code\pet_neda\fortranfiles\optimpl\IPENUM.f	295

How can I replace all of the references and ties to Compaq Visual Fortran? Or how can I solve these unresolved external symbol errors? Are there any similar libraries I can use to resolve some of the externals?

Thank you for the help in advance,

Gavin

IanH · ‎06-01-2018

I couldn't see an implied or explicit way that the Fortran project was being linked into the C++ project. There are a few ways this could be done (and perhaps I've missed what is being used), but as an example I would expect the name of the Fortran static library to be listed in the properties for the C++ project under Linker > Input > Additional Dependencies, and the output directory that holds that static library to be listed under Link > General > Additional Library Directories.

But this doesn't explain your C++ errors.

The C++ code that you show looks like a definition. If the procedure that code defines is referenced elsewhere in source code that is compiled in the C++ project, then that would explain the unresolved references. Is that code in a cpp file or a header file? If it is in a cpp file, I would expect it to be explicitly listed in the C++ source files.

Other observations, which don't necessarily require you to do anything:

- The Debug configuration for the C++ project has hard references to ifort 17 folders, while the Release configuration has references to version 13.

- The fortran library has "link library dependencies" selected. The only dependencies of that library are Fortran runtime libraries - which are better left out.

For giggles, I created a simple Fortran static library project that had a single procedure. I then created a MFC executable with default wizard settings in VS2015, and referenced the Fortran procedure via the OnAppAbout method in the MFC code. Changes I needed to make to get things to link correctly were all in the C++ project properties, and were:

- reference the Fortran static library under Linker > Input > Additional Dependencies, as described above.

- add the output directory for the Fortran static library under Link > General > Additional Library Directories, as described above.

- add the library directory for the Fortran compiler, also under Link > General > Additional Library Directories (in your case this is as you have set - $(IFORT_COMPILER17)\compiler\lib\ia32).

- Right click on the C++ project and via Build Dependencies > Project Dependencies, select the Fortran static library as a dependency of the C++ project (I think with mixed Fortran/C++ projects these days all this does is ensure that the projects are built in the right order, but in other situations it can help by automatically populating library and include file search paths).

Your list of unresolved references in your stack overflow post is slightly different, and list HTMLHelp. That library is still provided with the Windows SDK, but may need to be explicitly listed in the library dependencies for the C++ project (can't remember details - it has been too long).

View solution in original post

IanH · ‎05-31-2018

It is a bit ambiguous at times about which project within your Visual Studio solution you are referring to.

The errors indicate that the linker doesn't know where to find C++ code that should have been compiled previously. A Fortran project isn't likely to influence this and I doubt whether DFOR.lib is referenced or not is relevant for those list errors.

Do you have the source that has the definitions of the C++ functions listed - petMove::toString and the like? Is that source being compiled within the same project that is giving the errors? Is it compiled in a different project?

In terms of properties required for your Fortran code - do you know how the Fortran and C++ interface? Can you provide examples of a C++ function prototype that corresponds to a Fortran procedure? Are you passing strings between the languages?

If you recompile all Fortran source code, and don't bring any pre-compiled Fortran code in via static libraries, then I'd expect that the references to DFOR.lib should not be required.

You have posted this question in multiple places, with about the same amount of information each time. Project configurations can be complex, which can mean that lots of information is required. Consider posting the actual project configuration files (vfproj, vcxproj, etc). At some point it just becomes easier to give people trying to help you access to your whole solution.

Chandler__Gavin · ‎05-31-2018

Hello,

Sorry for the lack of information, I will try to be better with it but it has mainly been due to the fact that I am very new to this and am unsure what is necessary to understand the issue. In the future, if you continue to help me, please feel free to ask for any more files you need but I am not the creator or owner of these files so I can not just begin sending the whole project to everyone.

Bellow I have attached the configuration files. Also I think you are correct saying the error does not have much to do with dfor.lib or the sort but I am still unfamiliar with linking. Also do you know a way to figure out if I have the source code that defines the C++ functions listed, when I search for them using agent ransack, I find one code contains,

CString petMove::toString(){
CString discription;
discription.Format ("petMove - moveType: %d  partType: %d \n", 
moveType, partType);
return discription;
}

So would that be the code that defines it? Also it seems that this files is in the project directory (file), but not in the Visual Studio solution explorer window, and am not sure if it is being compiled at all.

Also, as far as I am aware, the fortran creates the majority of the objects for the project, and the both the Visual C++ project as well as the Fortran static library are in one solution where the VC++ is dependent on the fortran. As for how they interface, I am not entirely sure but I can search the files or send a few over.

If answering this question will require more information and files from me, just say so. In the meantime, thank you so much for the help and sorry for the multiple post, I realized I had not posted in the correct forum and realized my previous questions were not very well formed (neither is this one but I thought I may had gotten closer to informed question). Also I made a few changes to what project or solution I was talking about in the original question.

IanH · ‎06-01-2018