Heads up: Mesa/LLVM rebase and OpenGTL retirement in F20

[drago01]

On Fri, Mar 28, 2014 at 1:54 AM, Paulo César Pereira de Andrade
<paulo.cesar.pereira.de.andrade at gmail.com> wrote:
> 2014-03-27 17:40 GMT-03:00 Adam Williamson <awilliam at redhat.com>:
>> On Thu, 2014-03-27 at 16:02 -0400, Adam Jackson wrote:
>>> We'd like to update to Mesa 10.1 in Fedora 20, since the cycle is so
>>> long before F21 and (among other goodies) it enables OpenGL 3.3 on some
>>> newer Radeons.  This implies rebasing LLVM 3.4, and that's where it gets
>>> a little awkward: the OpenGTL package only works up to LLVM 3.3.
>>>
>>> However, OpenGTL is dead upstream, and the only thing requiring it in
>>> F20 gold - calligra-krita, by way of libQtGTL - has already been updated
>>> to Obsolete OpenGTL.  As far as I know OpenGTL is the only such package
>>> we have requiring LLVM 3.3, so the rest of the rebase should just be a
>>> matter of updating to match F21.
>>>
>>> The following source packages will also be updated for the llvm rebase:
>>>
>>> dragonegg
>>> gambas3
>>> pocl
>>> pure
>>> python-llvmpy
>>>
>>> If there are no serious objections I'll try to get this all into testing
>>> early next week.  If you _do_ happen to be using OpenGTL for something
>>> in F20, now would be an excellent time for you to start working on
>>> porting it to current LLVM.
>>
>> I can absolutely see the reasons for doing this, but...can it at least
>> go through a fesco rubber stamp? Let's face it, entirely deprecating a
>> library we shipped as part of the gold release seems to be a pretty
>> flagrant violation of the update policy, and really ought to be granted
>> a formal exception at the very least if it's going to go ahead.
>>
>> "As a result, we should avoid major updates of packages within a stable
>> release. Updates should aim to fix bugs, and not introduce features,
>> particularly when those features would materially affect the user or
>> developer experience."
>> "ABI changes in general are very strongly discouraged"
>>
>> https://fedoraproject.org/wiki/Updates_Policy#Stable_Releases
>>
>> Fedora *is* a platform, not just a set of packages, however half-assedly
>> we conform to that vision, so I guess I just feel a bit uncomfortable
>> not at least putting up a few hoops for this to jump through. :)
>
>   This patch may be useful:
> https://abf.rosalinux.ru/openmandriva/opengtl/blob/master/opengtl-0.9.18-llvm-3.4.patch

If that works we should probably use it for F20 to avoid retiring a
package mid release.