The KDE maintainer in Fedora started an interesting discussion some time ago in Digikam's mailing list. There was input from the very IJG:
It boils down to "jpeg6-2 is the only important thing. Forget about jpeg8 and jpeg9, which bring incompatible changes".
FWIW, Arch and Gentoo also follow the policy that jpeg6-2 (and jpeg-turbo with 6-2 API/ABI) is the real deal.
On Wed, Apr 24, 2013 at 1:48 PM, Mike Gabriel
<mike.gabriel@das-netzwerkteam.de> wrote:
Hi Ondřej,
I have just uploaded libjpeg-turbo to Debian and it still hovers in NEW [1].
On Mi 24 Apr 2013 11:23:04 CEST Ondřej Surý wrote:
Debian has already open ITP[3] #602034 for libjpeg-turbo, which
support libjpeg62 API/ABI and also some important bits of libjpeg8. As
libjpeg is one of the base libraries of the system, I think it might
be a good idea to discuss this project wide. Also although I have an
opinion (as you might have guessed from this email) that we should try
to be aligned with other distributions and the reasoning for not going
for , I will be happy with whatever result will end-up.
In an IRC discussion in #debian-devel several weeks ago the consensus was: the RT team (represented Julien) will probably not want two libjpeg implementations in Debian. My first packaging approach aimed at having the compat mode libraries available [2] and allow the user to install them as a drop-in replacement for libjpeg8.
The IRC discussion lead to the result that the compat packages are not wanted in Debian, only the native TURBOjpeg ABI. I was asked to ping Bill Allombert about his opinion to transition from libjpeg8 fully to libjpeg8-turbo. @Bill: can you repeat your disposition here again? I guess our earlier mailing was a private mail exchange.
A. Add libjpeg-turbo to Debian archive (that's easy)
Done. Waiting in NEW. Only containing libturbojpeg.so.1
B. Add required provides/alternatives for libjpeg62-dev and
libjpeg8-dev (where API/ABI match)
A packaging example can be seen in [1]. If the packages disappears from the NEW queue, you can also obtain a libjpeg-turbo version with compat packages provided here [3].
C. Decide which package should provide default libjpeg-dev library
Last statement from Bill: libjpeg by IJG
Greets,
Mike
[1] http://ftp-master.debian.org/new/libjpeg-turbo_1.2.90-2.html
[2] http://ftp-master.debian.org/new/libjpeg-turbo_1.2.90-1.html
[3] http://packages.x2go.org/debian/pool/main/libj/libjpeg-turbo/
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