While we're talking about RPM dependencies ...

[Richard W.M. Jones]

On Thu, Apr 05, 2012 at 08:21:15PM +0200, drago01 wrote:
> On Thu, Apr 5, 2012 at 8:03 PM, Richard W.M. Jones <rjones at redhat.com> wrote:
> > Today when using F17 Alpha, I ran qemu and got an error which was
> > something like:
> >
> >  qemu-kvm: undefined symbol usbredirhost_foo
> >
> > (I don't recall the precise symbol).  This was just because that
> > version of qemu was compiled against a later version of
> > libusbredirhost.so (but one with the same soname), and updating
> > libusbredirhost.so fixed the problem.
> >
> > The 'qemu' package has a bug, of sorts: the maintainer should have
> > added a specific Requires line:
> >
> >  Requires: usbredir >= <some version>
> >
> > However, instead of pushing this problem on packagers, maybe RPM
> > should resolve this by encoding the (admittedly long) list of symbols
> > used by a binary?
> 
> Well the bug here is that usbredir changed ABI without bumping the soname.

AIUI you don't need to bump the soname when you add a new function,
only if you incompatibly change an existing function or struct.

(Larger questions about the meaning of "ABI" omitted from this message ...)

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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