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Question

I am currently trying to get my head around library linking with Qt in order to split up some existing code into logically structured modular parts that can be called by different applications.

I keep getting a problem where no obj files are being created... so I have created a smaller sample project and replicated my problem below.

It seems, to me, the problem lies in the library ...so I will start there.

If I have code like this, the obj file is created (and can therefore be linked to by my test application):

mylib.h

#ifndef MYLIB_H
#define MYLIB_H

#include "mylib_global.h"

class MYLIB_EXPORT MyLib
{
public:
    MyLib();
    ~MyLib();

private:

};

#endif // MYLIB_H

mylib.cpp

#include "mylib.h"

MyLib::MyLib()
{

}

MyLib::~MyLib()
{

}

But if I remove the cpp file and just have the header file with function bodys included (as is the structure of my actual codes library as the code consists ONLY of templates), nothing is created:

mylib.h

// .......
public:
    MyLib(){}
    ~MyLib(){}
// .......

How can I get Qt to build my code please?

Answer 1

如果您的库只是一个头文件，您不需要编译它，在其他项目中包含您的头文件，它们将被编译到其中。