Mailinglist Archive: opensuse-factory (648 mails)

[Cristian Morales Vega <cmorve69@xxxxxxxx>]

2010/11/7 Pavol Rusnak <prusnak@xxxxxxxxxxxx>:
> On 07/11/10 16:40, Cristian Rodríguez wrote:
> > El 07/11/10 12:09, Cristian Morales Vega escribió:
> >
> > > > > That "libjpeg62 obsoletes and provides libjpeg8" is probably wrong?
> > > > > Shouldn't it obsolete/provide libjpeg6?
> >
> > libjpeg-turbo has a different SONAME, so it SHOULD NOT not conflict, nor
> > obsolete libjpeg8 in anyway.
> >
> > jpeg8 must remain installed on the user system on upgrade in case it is
> > needed by other packages.
>
> Ah, I get it now. Fixed Obsoletes/Provides in my repo, please check if it's
> OK :-)

It's OK with me. So:
- An update is/will be available for 11.3 for bnc#620175. Meaning
libjpeg v6 uses versioned symbols.
- A libjpeg-turbo package is available. Next upstream version will
version symbols. Since they have a history of releasing a new version
every two months I would not bother to patch 1.0.1.
- libjpeg-turbo has a "Colorspace Extensions" that apps could rely on,
and it seems there will be apps linked against libjpeg.so.6 for a long
time and libjpeg-turbo is the only v6 still supported... I don't think
anybody is going to argue about dropping libjpeg6 for 11.4 and use
libjpeg62 (libjpeg-turbo) instead.

What must be still decided is what to do with libjpeg.so.8, knowing that
- It seems libjpeg-turbo will be libjpeg.so.6, by default, for a long time.
- libjpeg-turbo supports the v8 "ABI", but with some features missing
- libjpeg-turbo is a young project (registered in SF on 2010-02-05),
but IJG neither has an history as an active project
- libjpeg.so.6 is what LSB mandates and Fedora uses

Ideally, I would
- Compile against libjpeg62. Fedora and LSB perhaps are not great
causes, but I can't think of even a bad cause to compile against
libjpeg8
- Provide a libjpeg8-devel package from the http://www.ijg.org/ source.
- Provide a libjpeg8 from IJG source and a libjpeg8-turbo*,
conflicting between them. Since IJG will be version "8.x" and
libjpeg-turbo version "1.x" I expect ZYpp to install the IJG version
by default, that would ensure maximum compatibility. If a dev is using
v8 IMHO he is accepting the reduced speed. But if an user wants the
extra speed he could manually install libjpeg8-turbo.

* Not possible until the next upstream release of libjpeg-turbo
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