Please Help!! Symbol(s) not found for architecture x86_64 issue

[dboostudio]

Hi, i'm having a problem with building my application.
I try to build my project after adding below files.

To write this code, I refer to the following link.
code Ref : https://github.com/Skycoder42/QHotkey

watch.h

#ifndef WATCH_H
#define WATCH_H

#include <QDebug>
#include<QObject>
#include <QThread>
#include <QApplication>
#include <Carbon/Carbon.h>

class Watch : public QObject
{
    Q_OBJECT
public:
    Watch(){};
    ~Watch(){};
public:
    static OSStatus MyHotKeyHandler(EventHandlerCallRef nextHandler,EventRef theEvent, void *userData);
    void registerHotkeyMac();
    void unregisterHotkeyMac();
private:
    EventHotKeyID gMyHotKeyID;
    EventHotKeyRef gMyHotKeyRef;
    EventTypeSpec eventType;
    QHash<int,EventHotKeyRef>hotkeyArray;

public slots:
    void watchSlot(QString data);
signals:
    void signalWatch();
};

#endif // WATCH_H

watch.cpp

#include "watch.h"

OSStatus Watch::MyHotKeyHandler(EventHandlerCallRef nextHandler,EventRef theEvent,
                         void *userData)
{
    Q_UNUSED(userData);
    Q_UNUSED(nextHandler);
    EventHotKeyID hkCom;
    GetEventParameter(theEvent,kEventParamDirectObject,typeEventHotKeyID,NULL,
                      sizeof(hkCom),NULL,&hkCom);
    int l = hkCom.id;
    qDebug()<<"hotkey pressed!!!!!!!!!"<<l;
    return noErr;
}

void Watch::registerHotkeyMac(){
    //Register All Keyboard to hotkey
    eventType.eventClass=kEventClassKeyboard;
    eventType.eventKind=kEventHotKeyPressed;
    InstallApplicationEventHandler(&Watch::MyHotKeyHandler,1,&eventType,NULL,NULL);

    gMyHotKeyID.id = 0;
    RegisterEventHotKey( kVK_ANSI_Q, cmdKey, gMyHotKeyID, GetApplicationEventTarget(), 0, &gMyHotKeyRef);
    hotkeyArray.insert(gMyHotKeyID.id, gMyHotKeyRef);

    gMyHotKeyID.id = 1;
    RegisterEventHotKey( kVK_ANSI_0, NULL, gMyHotKeyID, GetApplicationEventTarget(), 0, &gMyHotKeyRef);
    hotkeyArray.insert(gMyHotKeyID.id, gMyHotKeyRef);

    gMyHotKeyID.id = 2;
    RegisterEventHotKey( kVK_ANSI_1, NULL, gMyHotKeyID, GetApplicationEventTarget(), 0, &gMyHotKeyRef);
    hotkeyArray.insert(gMyHotKeyID.id, gMyHotKeyRef);
    //....
}

void Watch::unregisterHotkeyMac() {
    for(int i=124;i>=0;i--){
        UnregisterEventHotKey(hotkeyArray.value(i));
    }
}

void Watch::watchSlot(QString data){
    if(data == "1") {
        qDebug() << "watchCheck = true";
        registerHotkeyMac();
    } else {
        qDebug() << "watchCheck = false";
        unregisterHotkeyMac();
    }
}

main.cpp

#include "watch.h"
int main(int argc, char *argv[])
{
//
    Watch watch;
    QObject *pageMainObject = engine.rootObjects()[0];
    //connect signal from qml to watchslot
    QObject::connect(pageMainObject, SIGNAL(watchSignal(QString)),&watch, SLOT(watchSlot(QString)));
//
}

Compile Output

yesterday, this code build fine. but today i faced with it....
please help....

[Bonnie]

Have you linked Carbon? As in the qhotkey.prc.

[dboostudio]

@Bonnie Oh, thank you! I didn't check that part! After add .prc file, it build successfully!