multilib fun - devel packages

[Bill Nottingham]

Bill Nottingham (notting at redhat.com) said: 
> Jakub Jelinek (jakub at redhat.com) said: 
> > But that's just rpm bug, it shouldn't always prefer 64bit rpms over 32bit
> > ones, instead decide based on how it was configured.
> > For x86_64, it should be obviously defined to prefer 64bit, I think
> > on s390x similarly (there 64-bit code can do direct calls rather than
> > go through the literal pool all the time etc.).  On ppc and sparc
> > it should on the other side prefer 32bit rpms over 64bit.
> 
> This runs into problems on ppc64 installs when the ioctl/etc
> compatiblity layer is either a) missing b) broken.

Also, just changing the %prefer64 setting requires changing more
than that, as there are ordering implications in upper-level tools
that need conditionalized if this changes.

Bill