Binary compatiblity for liboxygenstyle.so

[Pino Toscano]

Alle venerdì 24 febbraio 2012, Hugo Pereira Da Costa ha scritto:
> On 02/24/2012 12:01 PM, Pino Toscano wrote:
> > Alle venerdì 24 febbraio 2012, Hugo Pereira Da Costa ha scritto:
> >> On 02/24/2012 11:43 AM, Pino Toscano wrote:
> >>> Alle venerdì 24 febbraio 2012, Hugo Pereira Da Costa ha scritto:
> >>>> no there is no guarantee for liboxygenstyle.so.4, and I don't
> >>>> plan to guarantee it.
> >>>> It is all internal to kde-workspace, and has no public api.
> >>> 
> >>> Then please correctly bump its SONAME, instead of using the same
> >>> SONAME (liboxygenstyle.so.4) for API-/ABI- incompatible new
> >>> versions of it.
> >> 
> >> Hi Pino,
> >> 
> >> I think the real issue here is:
> >> 
> >> despite the fact that you have a local kde build, the pluggins
> >> that gets loaded by Qt when running a KDE or Qt application are
> >> not the ones you compiled. An old one is used instead, that is
> >> inconsistent with the libraries it links to.
> >> The new, compiled one, should get loaded.
> >> No change of so name will fix that.
> >> Correct ?
> > 
> > No, because the old plugin would link to the liboxygenstyle with
> > the old SONAME, which would not get overwritten/overridden by a
> > newer version coming from the local KDE build.
> > Except for the unversioned .so symlink, two versions of the same
> > library with different SONAME (properly compliled) are
> > co-installable.
> 
> Hi Pino,
> 
> I understand that. The point I was trying to make, is that you would
> still get the "old" pluggin, admittingly without crashing, but which
> would nonetheless be not correct.

In that case, the problem is, like also Thiago said, a simple issue with 
the environment of the locally built KDE.

But even if so, if a non-KDE application would get the old plugin it's a 
much better situation than crashing straight away because of a library 
not correctly handling ABI breaks with proper SONAME bump.

-- 
Pino Toscano
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