Can't detect MinGW compiler in qt 5.0 in linux machine

Hello,
I am new to QT.
I have developed QT GUI application on linux using QT 5.0 and i want to generate exe for windows using executable in QT 5.0.
How to cross-compile.pro project file which is in linux in qt 5.0.2 for windows environment to work as a exe without any error ?

Is there MinGW compiler do we need to detect it in linux machine using qt 5.0 ?

Can you please guide me it is very urgent.