Automatic source rpm compilation? (was: i686 repository)

[nyook]

> See the difference between the -march and -mcpu from the gcc man page:

Thank you. Now it's clear to me.

I know that there's a command line switch to pass to up2date to make it 
fetch only source rpms. However, I've not found an option to 
automatically let up2date compile these source rpms.

Does anyone know if there is such a switch for up2date to let it compile 
the source rpms automagically or do I have to do that manually (using a 
shell script I think).