[Cooker] Building athlon kernel rpm from src.rpm

[Mario R. Pizzolanti]

Hi!
I'm trying to build rpms compiled for athlon using the cooker 
kernel-2.4.20.2mdk-1-1mdk.src.rpm package.

When I give the command:
        rpmbuild --rebuild --target=athlon kernel-2.4.20.2mdk-1-1mdk.src.rpm
the process crashes after a couple of minutes...
Is this the correct command?  I have also tried using
        --target=athlon-gnu-linux 
with the same results :(

Thanx,
Mario