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Re: [PATCH] PowerPC64 ELFv2 ABI 6/6: Bump soname version number

On Wed, Nov 13, 2013 at 07:32:32PM +0100, Ulrich Weigand wrote:
> > > Joseph Myers wrote:
> > The version there is wrong - it should be GLIBC_2.19, not GLIBC_2.18, 
> > since the 2.18 release did not in fact support little-endian.
> Alan, any comments on that?

I quite strongly disagree with Joseph here.  The libc world consists
of more than just official FSF glibc releases.

We are very likely going to have a distro release off the 2.18 branch,
or at least based on source prior to the FSF 2.19 release.  Correct me
if I'm wrong here, but I believe that distro glibc ought to be marked
as 2.18.  (So as to differentiate it from the FSF 2.19 release.  If
the distro release is marked 2.19, and the FSF 2.19 makes changes to
function interfaces then we'll be in trouble when upgrading glibc.)

Assuming I'm correct about that, then mainline glibc needs to have
2.18 as the base symbol version even though no official 2.18 release
has occurred.  If the base is changed to 2.19 then there is no way to
upgrade a system using the distro 2.18, you'll get complaints about
missing GLIBC_2.18 versions from every file dynamically linked against
the distro 2.18..

Alan Modra
Australia Development Lab, IBM

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