Using Serial Port in Qt 4.8.4 with VS2008

Hello! I want to use serial port in Qt 4.8.4. For the purpose, i am following this article. I have cloned the qt library for Qt4 with git, but when i try to execute the statement

qmake ../qtserialport/

i am getting make error

D:\Docs\Prsys\Qt Projects\qtserialport-build>D:\System\Installations\Qt\4.8.4\bin\qmake../qtserialport/
QMAKESPEC has not been set, so configuration cannot be deduced.
Error processing project file: ../qtserialport/

Kindly suggest a suitable way to use uart library with Qt.

Thank you

@Eshwar ,

Thank you for contacting support.

Did you try this one?. We are not QT expert. Pleae wait for few days, we are looking into it and get back soon.

@KDAB, If you have any comments regarding this, please help the customer.