[Qt] Kompilacja linux-windows

#include"mainwindow.h"

MainWindow::MainWindow()
{
    QTextCodec::setCodecForTr( QTextCodec::codecForName( "UTF-8" ) );
   
    createMenus();
    createStatutsBar();
   
    label = new QLabel( tr( "Label ety" ), this );
    label->setGeometry( 5, 5, 100, 30 );
   
    button = new QPushButton( tr( "&Enter..;)" ), this );
    button->setGeometry( 75, 15, 150, 75 );
   
    butlab = new QPushButton( tr( "&Zmiana" ), this );
    butlab->setGeometry( 5, 64, 100, 30 );
   
    connect( button, SIGNAL( clicked() ), qApp, SLOT( quit() ) );
    connect( butlab, SIGNAL( clicked() ), this, SLOT( foo() ) );
   
    setMinimumSize( 200, 200 );
    resize( 480, 320 );
}

void MainWindow::foo()
{
    label->setText( tr( "Heppy :)" ) );
}

void MainWindow::createMenus()
{
    menu = menuBar()->addMenu( tr( "&Plik" ) );
   
    Action = new QAction( tr( "&Exit" ), this );
    Action->setStatusTip( tr( "Wyjdz" ) );
    connect( Action, SIGNAL( triggered() ), qApp, SLOT( quit() ) );
    menu->addAction( Action );
}

void MainWindow::createStatutsBar()
{
    statusBar()->showMessage( tr( "Ready" ) );
}

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include<QMainWindow>
#include<QPushButton>
#include<QTextCodec>
#include<QtGui>

class MainWindow
    : public QMainWindow
{
    Q_OBJECT
   
private:
    QPushButton * button;
    QPushButton * butlab;
    QLabel * label;
   
    QMenu * menu;
    QAction * Action;
   
    void createMenus();
    void createStatutsBar();
public:
    MainWindow();
   
private slots:
    void foo();
};

#endif // MAINWINDOW_H

#include<QApplication>

#include"mainwindow.h"

int main( int argc, char * argv[] )
{
    QApplication app( argc, argv );
    MainWindow okno;
   
    okno.show();
   
    return app.exec();
}