error: undefined reference to `createDevice'

QT       += core

QT       -= gui

TARGET = Game
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

LIBS += -Lirrlicht/lib/Linux -Irrlicht -opengl
INCLUDEPATH += irrlicht/include

#include <irrlicht.h>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

int main()
{
      IrrlichtDevice *device =
          createDevice( video::EDT_SOFTWARE, dimension2d<u32>(640, 480), 16,
              false, false, false, 0);

      if (!device)
          return 1;
      device->setWindowCaption(L"Hello World! - Irrlicht Engine Demo");

      IVideoDriver* driver = device->getVideoDriver();
      ISceneManager* smgr = device->getSceneManager();
      IGUIEnvironment* guienv = device->getGUIEnvironment();

      guienv->addStaticText(L"Hello World! This is the Irrlicht Software renderer!",
          rect<s32>(10,10,260,22), true);

      smgr->addCameraSceneNode(0, vector3df(0,30,-40), vector3df(0,5,0));
      while(device->run())
{
          driver->beginScene(true, true, SColor(255,100,101,140));

          smgr->drawAll();
          guienv->drawAll();

          driver->endScene();
      }

      device->drop();
      return 0;
}

LIBS += -L/home/masb8ly/Projects/Game/Irrlicht/lib/Linux -lIrrlicht -lGL -lX11 -lXxf86vm
INCLUDEPATH += /home/masb8ly/Projects/Game/Irrlicht/include

void MainWindow::on_VideoAutoB_clicked()
{
     qreal a;
     QString tmps;
     QList<qreal> AutoReal;

     QSqlQuery Auto1("SELECT Bench,Brend FROM Proc WHERE Name='"+ui->ProcNameCB->currentText()+"'");
     Auto1.first();

     if (Auto1.value(1).toString()=="Intel")
     {
     QSqlQuery query("SELECT Name,Bench FROM Video WHERE Chipset='nVidia'");
     while (query.next())
     {
         QString name = query.value(0).toString();
         a = (Auto1.value(0).toDouble()/query.value(1).toDouble());
         if ((Auto1.value(0).toDouble()<=4500) && (a>=1.8) && (a<=6)) {AutoVideo.append(name); AutoReal.append(a);}
         if ((Auto1.value(0).toDouble()>4500) && (Auto1.value(0).toDouble()<=8000) && (a>=1.5) && (a<=4.5)) {AutoVideo.append(name); AutoReal.append(a);}
         if ((Auto1.value(0).toDouble()>8000) && (a>=1.2) && (a<=2.5)) {AutoVideo.append(name); AutoReal.append(a);}
     }
     }
     if (Auto1.value(1).toString()=="AMD")
     {
     QSqlQuery query("SELECT Name,Bench FROM Video WHERE Chipset='AMD Radeon'");
     while (query.next())
     {
         QString name = query.value(0).toString();
         a = (Auto1.value(0).toDouble()/query.value(1).toDouble());
         if ((Auto1.value(0).toDouble()<=4500) && (a>=1.8) && (a<=6)) {AutoVideo.append(name); AutoReal.append(a);}
         if ((Auto1.value(0).toDouble()>4500) && (Auto1.value(0).toDouble()<=8000) && (a>=1.5) && (a<=4.5)) {AutoVideo.append(name); AutoReal.append(a);}
         if ((Auto1.value(0).toDouble()>8000) && (a>=1.2) && (a<=2.5)) {AutoVideo.append(name); AutoReal.append(a);}
     }
     }
     for (int i=AutoReal.length()-1;i>=0;i--)
     {
         for (int j=AutoReal.length()-2;j>=0;j--)
         {
             if(AutoReal[j]<AutoReal[j+1])
             {
                 qreal tmp=AutoReal[j];
                 AutoReal[j]=AutoReal[j+1];
                 AutoReal[j+1]=tmp;
                 tmps = AutoVideo[j];
                 AutoVideo[j]=AutoVideo[j+1];
                 AutoVideo[j+1]=tmps;
             }
         }
     }
     ui->VideoNameCB->setCurrentText(AutoVideo[(AutoVideo.length()/2)]);
     qDebug() << AutoVideo[AutoVideo.length()/2];
}