How to set QMAKESPEC ??

[Shuchi Agrawal]

hi all,
i am new to Linux ( i have installed federo core 5 and Qt frm qt-x11-opensource-src-4.2.2).
now when i m trying to compile n execute the t1 sample given with Qt, its giving the following error :
[root@localhost t1]# qmake -project
[root@localhost t1]# qmake
/root/qt-x11-opensource-src-4.2.2/.qmake.cache:2: Unknown replace function: quote
/root/qt-x11-opensource-src-4.2.2/.qmake.cache:3: Unknown replace function: quote
Failure to read QMAKESPEC conf file /mkspecs/linux-g++/qmake.conf.
Error processing project file: /root/qt-x11-opensource-src-4.2.2/examples/tutorial/t1/t1.pro
Please help me, and tell me the commands to do it. i have logged in the "root" login.
please tell me tht do i need to install any compiler (like mingw) to use with it?
thanks