Rt linux and qt programming

Hi
I am a novice programmer on rt linux.
My requirement is, I have a front end ui developed in Qt3 on fedora 2 which has rt linux running. I am supposed to invoke a button which would make some rt calls to write data to devices.
The entire scheme looks like greek latin to me.
To use rt linux calls, i am supposed to include rtl.mk file into the makefile generated by qmake command.(using kdevelop ide for writing qt applications).
My question is how to interface these rt calls or threads within a qt program to fulfill my requirement
Please help.
Regards
capricornus78