libjpeg-turbo API/ABI bump in F19 (transition from jpeg6 to jpeg8 API/ABI)

Adam Williamson awilliam at
Thu Oct 18 21:51:01 UTC 2012

On Thu, 2012-10-18 at 16:43 +0200, Adam Tkac wrote:
> On Thu, Oct 18, 2012 at 10:35:56AM -0400, Bill Nottingham wrote:
> > Adam Tkac (atkac at said: 
> > > I've just created
> > > page which
> > > contains plan how to successfully move from current jpeg6 API/ABI to more recent
> > > jpeg8 API/ABI for Fedora 19.
> > > 
> > > All packages which depends on will have to be rebuilt. Since I have
> > > provenpackager privileges, I will cook some script which will rebuild all
> > > pkgs automatically so no action will be required from maintainers.
> > > 
> > > If there are no objections against this approach, I will start with this task
> > > next week.
> > 
> > Ouch. I can see a need for a compat library for some period of time here -
> > the jpeg6 API has certainly been around for quite a long while.
> Hm, you are probably right. Since libjpeg is widely used, there might be some proprietary
> apps which require it.

Yeah, I'm with Bill. I note you listed this as the 'contingency plan'
for the feature:

 Contingency Plan

Create libjpeg-turbo-compat and libjpeg-turbo-compat-devel libraries
with jpeg6 API/ABI and ship them in distro. 

I'd suggest you should just make it a plan from the start to have the
-compat library available as part of the feature (so, really, just drop
step 4 of 'scope'), and have the 'contingency plan' be 'abandon ship and
go back to building with the jpeg6 API'.
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | adamwfedora

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