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Bug#717076: tech-ctte: Decide what jpeg library the Debian project will use

On Wed, 24 Jul 2013, Ondřej Surý wrote:
> > Finally, it doesn't currently look like the libjpeg-turbo packages are
> > at all in a state to replace the libjpeg8 or libjpeg6b packages. I'm not
> > sure why the CTTE should rule to replace the IJG packages when the work
> > and testing necessary to make the LJT packages ready hasn't been done.
> Mike has explained why:


> Anyway Ubuntu is using LJT packages since Ubuntu precise (e.g. 2011)
> as a drop-in replacement for libjpeg8 and I think we can adapt their
> work quite easily.

Ok; I sort of gathered this from reading the LJT ITP, but I wasn't
totally certain.

> You (as tech-ctte) has also an option to allow compat libjpeg8
> packages built from LJT, but this won't solve anything, since Bill
> plans to move to libjpeg9 ABI and LJT does not plan to support v9 ABI.

Well, we can address this by requiring libjpeg-dev to be the 8 ABI, and
libjpeg9-dev to be the 9 API, but that's probably not desirable.

> Thus I think this needs a decision from tech-ctte before we make the
> switch to different implementation of libjpeg.

I'm personally concerned about switching from IJG to an as-of-yet
untested in Debian LJT package. The actual uploading to Debian might
require a CTTE decision, but the packages with the desired transition
plan should be ready and tested before the CTTE makes its final
decision. [I recognize that this is going to put a fair bit of work on
the LJT maintenance team with the possibility that the work is just
going to be junked if the CTTE decides Debian should stay with IJG.[1]]

1: It is of course possible that other committee members would be wiling
to make a decision without already having the packages ready, but I'd
personally have a far easier time deciding knowing that they were tested
and known to be working.

Don Armstrong                      http://www.donarmstrong.com

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