Linking statically to CRT is not supported for WinRT components or Windows 8 projects

Question

I am moving Project from Desktop to Metro. So there are many old codes with CRT.

I want to use a WinRT componet in which my old code can be loading.

but after succeed compiling, i got many link errors as below:

error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Lockit::_Lockit(int)" (__imp_??0_Lockit@std@@QAE@H@Z)

 error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl std::_Debug_message(wchar_t const *,wchar_t const *,unsigned int)" (__imp_?_Debug_message@std@@YAXPB_W0I@Z) referenced in

error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base12::_Container_base12(void)"

 error LNK2019: unresolved external symbol "__declspec(dllimport) public: struct std::_Iterator_base12 * * __thiscall std::_Container_base12::_Getpfirst(void)const 

 error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl std::_Xbad_function_call(void)" (__imp_?_Xbad_function_call@std@@YAXXZ)

how can i use the old code? i am so appreciated if anyone tell me what's the problem and how can i use CRT in metro apps.

Answer 1

Hi Alex,

Windows store app can use only a subset of CRT.

for porting a desktop app to windows8 store app please refer the following link.

http://ecn.channel9.msdn.com/events/Win8CppEvent/PortingToMetro.pptx

Check the CRT section too.. Hope it will help you to port.

thanks,

Bhash

Answer 2

For a Windows Store app, you need to build all your code using VS 2012 and the current CRT. Secondly, static linking of the CRT is not supported for Windows Store apps.

Answer 3

This MSDN topic provides a bit more info: http://msdnstage/en-us/library/windows/apps/hh700130.aspx

Answer 4

Little more info.

CRT usage guidelines - http://msdn.microsoft.com/en-us/library/hh972425.aspx

Unsuspported CRT functions - http://msdn.microsoft.com/en-us/library/hh674596.aspx

thanks,

Bhash

Answer 5

thank Bhash, Chuck and Michael:

  but maybe the above answer can't solve my problem.

my project passed the compile and got no error.

but there were many linking errors.

i checked my code and found there are not unsuspported CRT functions.

i used the compiler option /MDt and it is said "That is, a debug, multithread, and DLL-specific version of the CRT. Such an app is not supported on the Windows Store."

i thought it was a CRT library problem. but after checking my code, i was puzzled.  what is the problem indeed?

why there were no compiling error but so many linking errors?

thanks advanced. 

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Alex FrontWall

Answer 6

i found there are some sentences in my old codes:

   #pragma comment(linker, "/NODEFAULTLIB:LIBCMTD")  

   #pragma comment(linker, "/NODEFAULTLIB:MSVCPRTD")

    #pragma comment(lib, "LIBCPMTD")

maybe this is the reason.

thanks guys

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Alex FrontWall