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Here is My scenario. I have a project which contains 30 subprojects. In one of the projects I have used CLR (common language runtime) so I modified its runtime with /mdd (multi threaded debug DLL).
Individually all the projects are built successfully. But when I try to compile the main project I am getting the following linker errors:
LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
LIBCMTD.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(invarg.obj) : error LNK2005: __invalid_parameter already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(invarg.obj) : error LNK2005: __invoke_watson already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(crt0.obj) : error LNK2005: _mainCRTStartup already defined in MSVCRTD.lib(crtexe.obj)
LIBCMTD.lib(fclose.obj) : error LNK2005: _fclose already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(printf.obj) : error LNK2005: _printf already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(mbstowcs.obj) : error LNK2005: _mbstowcs already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(dbgrptw.obj) : error LNK2005: __CrtDbgReportW already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(wcstombs.obj) : error LNK2005: _wcstombs already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(tzset.obj) : error LNK2005: __tzset already defined in MSVCRTD.lib(MSVCR80D.dll)
LIBCMTD.lib(stricmp.obj) : error LNK2005: __stricmp already defined in MSVCRTD.lib(MSVCR80D.dll)
How to resolve these all?
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The object file or library that contains the definition of the symbol isn't linked. In Visual Studio, make sure the object file or library that contains the symbol definition is linked as part of your project. On the command line, make sure the list of files to link includes the object file or library.
To fix this issue, add a reference to the required library or object file to your project. For more information, see lib Files as linker input. When the project has a reference to a library (. LIB) or object (.
This error can occur when the Visual Studio path to the Windows SDK is out of date. It may happen if you install a newer Windows SDK independently of the Visual Studio installer. To fix it in the IDE, update the paths specified in the VC++ Directories property page. Set the version in the path to match the new SDK.
Linker errors occur when g++ tries to combine all of your .o files into an executable file. Linker errors CANNOT be fixed by guarding header files or by changing which header files are included in your . cpp file. non-aggregate type -- classes and structs are generically called "aggregate" types.
LIBCMTD is the debug version of the static multi-threaded C runtime library. MSVCR80D is a debug version of the DLL-based multi-threaded C runtime library. Some of your sub-projects are calling for one, some the other. It's a Microsoft mess, but you have to deal with it. Pick one, say, Multi-threaded debug DLL, and use it exclusively for the Debug version of your project and all sub-projects. The Microsoft license (I am told) requires that you use a non-debug version for released software.
See the following for more info: CLICK.
138
Seems like some of your projects use static runtime library. (And you have chosen dynamic for one of your projects) This combination is unsupported.
Reminds me of: Linker errors between multiple projects in Visual C++
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