create and use shared library in qt

Hi everyone,
I tried to create and use a shared library in qt.I used the c++ library project to create this.

code used to create a shared library:

.pro file:

Code:

---

QT       -= gui
 
TARGET = myLIB
TEMPLATE = lib
 
DEFINES += MYLIB_LIBRARY
 
SOURCES += mylib.cpp
 
HEADERS += mylib.h\
        myLIB_global.h

---

.h file

Code:

---

class MYLIBSHARED_EXPORT MyLIB {
public:
    MyLIB();
    int add(int x,int y);
};
 
extern "C"
{
    int sub(int x,int y);
}

---

.cpp file :

Code:

---

MyLIB::MyLIB()
{
}
int MyLIB::add(int x, int y)
{
    return x+y;
}
 
int sub(int x, int y)
{
    return x-y;
}

---

In my test application i am able to use sub function.code is

Code:

---

typedef int (*pf)(int,int);
    pf fun=(pf)QLibrary::resolve("./libmyLIB.so","sub");
    int x=fun(20,10);

---

It is working.
But when i am trying to use isLoaded function it is returning false.

Code:

---

QLibrary myLib("./libmyLIB.so");
ok=myLib.isLoaded();

---

My problem is i want to use the function directly without using QLibrary.(only adding in .pro file)
How i will use add function in my application ?

See in the qmake documentation for LIBS, include the header file of your library and use your library classes as usual.

thanks for reply.Can you tell me what should be written in .h file.One prototype or any thing extra.

In your case you probably only have to use

Code:

---

#include "mylib.h"

---

thanks it is working.