When compiling on a Windows XP : Cygwin installation ,so far I'm
getting 3 errors using Konstruct to do the job:

1) qt_windows.h not found
So I had to go to the internet and find the file.

2) qapplication.cpp: line 2893: error qt_winver not defined

#if defined(Q_OS_CYGWIN)
Qt::WindowsVersion QApplication::winVersion()
return qt_winver;

So I chaged the return type to:
return Qt::WV_XP; // Qt::WindowsVersion enum for Windows XP

3)network/qdns.cpp: line 2298: error DWORD does not name a type

I am presently going on to fix this error... hope this is the last one.