zstd and Mercurial packaging

[Neal Becker]

I did ask about this on the fedora-devel mail list, it appears that this
should be OK, discussion here:
https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/3D6VGSMAUYDX3PCCE533ZRG233GGLXZX/


On Thu, Dec 1, 2016 at 10:20 AM Augie Fackler <raf at durin42.com> wrote:

> On Dec 1, 2016, at 08:53, Neal Becker <ndbecker2 at gmail.com> wrote:
>
> Fedora guidelines: All packages whose upstreams allow them to be built
> against system libraries must be built against system libraries.
>
> So if zstd could become a standard system library it would have to be
> unbundled.
>
>
> That should be possible some day, but today we're depending on an as-yet
> unstable API that requires static linking against a specific version of the
> library. Is that sufficient to prevent unbundling for now?
>
>
> On Wed, Nov 23, 2016 at 8:01 AM Dirkjan Ochtman <dirkjan at ochtman.nl>
> wrote:
>
> On Tue, Nov 22, 2016 at 9:53 PM, Gregory Szorc <gregory.szorc at gmail.com>
> wrote:
> > I'm sending this email to reach out to packagers so we have time to
> address
> > packaging concerns around zstd. I'm willing to make upstream changes to
> both
> > Mercurial and python-zstandard to ease packaging issues. Please read the
> > aforementioned commit messages to understand the vendoring decision and
> then
> > let me know if there is anything I can do to make your life easier.
>
> Very interesting work!
>
> On Gentoo Linux, we definitely prefer unbundling vendored libraries.
> For autotools build systems, we ideally get a --use-system-zstd or
> similar that will disable usage of the bundled dependencies and use
> the normal header and library path environment variable to find it.
> I'm not really sure how that fits into distutils stuff, though.
>
> Given the static linking requirements between python-zstd and zstd, an
> easy improvement here would be to make the install of the bundled
> python-zstd optional, so that our package manager could just install
> the system python-zstd instead. In that case, it would be important
> that a requirements.txt or similar lists the version of python-zstd
> used, and ideally any changes to that version would also figure
> prominently in future changelogs.
>
> Cheers,
>
> Dirkjan
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