Installing libraries for toolchain's(buildroot) qmake

Hi,

I am using buildroot's qmake to cross compile my applications for ARM based-board. I can successfully compile and run helloworld or other applications not requiring external libraries. However when some applications require libraries like -fftw3 or -ljack, then these are not searched up by the buildroot's qmake. They run fine on my Desktop's qmake where these external libraries can be installed.

So I have libraries for my desktop's tool chain picked up by qmake but I want to get those libraries picked up by buildroot's tool chain as well.

Can any one tell me how can I do it ? How can I compile these libraries for buildroot's qmake.

Thanks,