What decides that a package is multilib?

[Bill Nottingham]

Rex Dieter (rdieter at math.unl.edu) said: 
> Mary Ellen Foster wrote:
> 
> > Someone has just filed a bug that pl.i586 conflicts with pl.x86_64:
> >      https://bugzilla.redhat.com/show_bug.cgi?id=508515
> > 
> > This is indeed true (I just verified it), but what I don't know is why
> > pl.i586 is in the multilib repository in the first place. How do
> > packages become multilib?
> 
> Several general rules apply:
> 1.  all -devel pkgs (and dependencies)
> 2.  any pkg containing shlibs (basically matching %_libdir/lib*.so.*
> 
> plus a whole bunch of other exceptions, but hopefully, that gives the
> general idea.

Yup. If you want to see the specific algorithm used:

http://git.fedorahosted.org/git/?p=mash;a=blob_plain;f=mash/multilib.py;hb=HEAD

Bill