[Qt-interest] Can we use non qt-library created using QT in VC++?

[Marco Borm]

The problem is the incompatible name mangling of c++ symbols between 
WinGW and the MS compiler. You can find more informations here:
http://www.mingw.org/wiki/MixingCompilers

Chakresh Sharma wrote:
> Hi,
>
> I tried to created a non-static library using Qt Creator. First of all 
> it creates libProjName.a instead of .lib extention? Does extention 
> really matters?
>
> Also if i try to add this library in project in vc++ it gives 
> following linking errors:
>
> testHello error LNK2019: unresolved external symbol "public: void 
> __thiscall Hello::sayHello(void)" (?sayHello at Hello@@QAEXXZ) referenced 
> in function _main
> testHello error LNK2019: unresolved external symbol "public: 
> __thiscall Hello::Hello(void)" (??0Hello@@QAE at XZ) referenced in 
> function _main
> testHello fatal error LNK1120: 2 unresolved externals
>
>
> My .Pro file is :
>
> #-------------------------------------------------
>
> #
>
> # Project created by QtCreator 2009-10-10T17:16:33
>
> #
>
> #-------------------------------------------------
>
> QT -= gui
>
> TARGET = Hello
>
> TEMPLATE = lib
>
> CONFIG += staticlib
>
> SOURCES += hello.cpp
>
> HEADERS += hello.h
>
>
> The cpp file is :
>
>
> #include "hello.h"
>
> Hello::Hello()
>
> {
>
> }
>
> void Hello::sayHello()
>
> {
>
> int i = 0;
>
> }
>
>
> and header is
>
>
> #ifndef HELLO_H
>
> #define HELLO_H
>
> class Hello {
>
> public:
>
> Hello();
>
> void sayHello ();
>
> };
>
> #endif // HELLO_H
>
>
>
> I use above three files to create a library. it creates libHello.a
>
>
> My vc++ project contains following code :
>
>
> // testHello.cpp : Defines the entry point for the console application.
> //
>
> #include "stdafx.h"
> #include <Hello.h>
> int _tmain(int argc, _TCHAR* argv[])
> {
> Hello obj;
> obj.sayHello ();
>     return 0;
> }
>
>
> Can any one suggest any hint why it is happening?
>
>
> Regards,
>
> Chakresh
>
>
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