Thnaks a lot jacek and Uwe.I commented out the QwtDesigner part in qwtconfig.pri file and it compiled fine this time.So thats done.
Now I compiled qwt the examples as well by using
cd examples
qmake
make
But when I check out the example folders I dont find any arm executables there.There are some moc and object files no doubt but my basic idea is to test these examples out on the ARM board.Any idea as to how do I get an ARM executable from these files?

Secondly for running qwt examples on the board do I need to copy any additional libraries on the board?Because I remember having copied Qtopia cross compiled libs on the board to get Qt examples running on the board.

Thanks again for the help