Re: KDE-4.14.0 doesn't work

On 09/11/2014 01:27 PM, Duncan wrote:
> James Tyrer posted on Thu, 11 Sep 2014 12:26:15 -0700 as excerpted:
>
>> I mentioned problems with KDE-4.14.0.  At start up, Plasma-Desktop
>> immediately crashes and will not restart.  KATE/KWrite do the same for
>> apparently the same reason.
>>
>> Some research indicates that Qt-4.8.6 will not run on AMD-64 bit
>> processors.  Going back to 4.8.4, which I still had on the system,
>> fixed  the problem.  I have not tried 4.8.5 yet.  Has anyone used it to
>> know if it works or not?
>>
>> Does anyone know if this had been fixed and if there is a repository
>> that I could download an updated version from?
>
> While I'm running kde4-live, here's what plasma-desktop --version reports:
>
> Qt: 4.8.6
> KDE Development Platform: 4.14.0
> Plasma Desktop Shell: 4.11.11
>
> ... and uname -m:
>
> x86_64
>
> So kde-4.14.x and qt-4.8.6 is running fine on amd64, here. =:^)
>
>
> Do you have any more information on that qt-4.8.6 not running on amd64
> claim?  Was it qt-4.8.6 in general or only with kde?  What part of qt4
> (qtcore, qtwebkit, qtgui, etc) was it?
>
> With a bit of additional information perhaps I can track down any patches
> that gentoo has applied that might have fixed it for me here.  But
> without knowing more about what in particular I'm looking for, a quick
> look at qtcore and qtgui's patches at least, says most of them were from
> qt-4.8.5, tho still applied in 4.8.6.  So if you jumped from 4.8.4 to
> 4.8.6 and found the latter didn't work, based on my patch-quick-look,
> 4.8.5 is likely not to work either.  I didn't check in detail enough to
> see if any of them were amd64 specific, however.
>
Which GCC did you use?  IF you recall, there was a problem with 4.8.4:

https://bugs.gentoo.org/show_bug.cgi?id=450818 which was fixed.  But, 
something appears to have gone wrong with the new version of the 
compiler: GCC-4.9.0

> (FWIW, my qt-4.8.6 is from the gentoo/qt overlay as it hasn't made it
> into the main gentoo tree yet.  Neither has qt-5.  They're reworking
> 4.8.6 and qt-5 both to cooperate better while trying to build qt-based
> packages on the same system, and to use qt-chooser to select one or the
> other at runtime.  But that work isn't ready for the main tree yet, so
> 4.8.6 and 5.x both remain in the qt overlay, which I have activated and
> installed them from.  However, other than the occasional build
> complication from generally qt4-based packages getting confused by qt5,
> I've not seen any problems from it, and definitely haven't seen any
> problems with 4.8.6 on amd64 -- this is the first I've read of that at
> all.)
>
>
> Anyway, qt-4.8.6 is definitely runnable on amd64 as I'm doing it, but
> that's not saying whether there's patches applied that are allowing it,
> or that it would or wouldn't break without them.

Before with 4.8.4 it was an issue of optimization so it was a compiler 
issue.  So, it is going to make a difference which compiler you are 
using and which compiler options you use.

-- 
James Tyrer

Linux (mostly) From Scratch
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