QApplication not found using qmake win64

[A Former User]

I am using the 64 bit version of Qt 4.8.6 (Qt-x64) under Windows 8.1 64 bit.
I am using GCC-TDM 4.8 x86_64 as compiler.
QMAKESPEC is set to C:\qt-4.8.6-x64-mingw-sjlj\mkspecs\win32-g++

I get following error in the process:
!http://i.imgur.com/JLIM1Ce.png(Process)!

MSYS gives similar errors.... Possible reason?

[SGaist]

Hi and welcome to devnet,

Did you build Qt yourself ?

[A Former User]

[quote author="SGaist" date="1413930987"]Hi and welcome to devnet,

Did you build Qt yourself ?[/quote]

No... I downloaded from here- http://sourceforge.net/projects/qtx64/files/qt-x64/4.8.6/mingw/sjlj/

'qt-4.8.6-x64-mingw482r3-sjlj.7z' file, the one which don't include compiler by default.

[SGaist]

Silly idea but what happens if you just use

@#include <QApplication>@

?