libjpeg

[Michael Stahl]

On 14.10.2014 15:46, Stephan Bergmann wrote:
> On 10/14/2014 12:06 PM, Bjoern Michaelsen wrote:
>> I havent bibisected with that repo myself yet, just saw that e.g.:
>>
>>   https://bugs.freedesktop.org/show_bug.cgi?id=84733#c1
>>
>> has a lot of skipped commits.
> 
> (Looks like I at least cannot easily reproduce that on my Fedora 
> machine, as that bibisect repo is apparently build --with-system-jpeg so 
> requires a libjpeg.so.8 I don't have.)
> 

yes, that's an endemic problem with all bibisect repos, except the very
latest from Bjoern, they're all missing --without-system-jpeg and thus
require that particular libjpeg.so.8 on the system.  i've worked around
that by just building it from source and LD_PRELOADing it.

on a related note, why are we bundling IJG libjpeg-8 [1] ... even
libjpeg-9 on master with LO, instead of libjpeg-turbo [2] like most
linux distros do nowadays?  apparently the prevailing opinion is that
libjpeg > 6 just adds questionable new features that, when used, cause
interop problems with older software that supports only the ISO
standard, i.e., what's implemented in libjpeg-6, whereas libjpeg-turbo
is standard JPEG and is quite optimized on x86 CPUs.

this seems to be a good summary of the situation:
https://lists.debian.org/debian-devel-announce/2014/08/msg00000.html

[1] http://ijg.org/
[2] http://www.libjpeg-turbo.org/