command line compile qt program

1) linux version: 1. create cpp file, ex: test.cpp   #include <QtGui>
  int main(int argc, char *argv[])
  {
      QApplication app(argc, argv);
      QLabel *label = new QLabel("Linux is wonderful", 0);
      app.setMainWidget(label);   
      label->show();
     return app.exec();
  } 2. use qmake: qmake -project   3. use make make   4. run programe ./test