Re: [gentoo-user] emerge conflict

[Daniel Wagener <stelf@gmx.net>]

On Fri, 13 Aug 2010 15:17:50 +0200
"J. Roeleveld" <joost@antarean.org> wrote:

> On Friday 13 August 2010 14:15:59 Alan McKinnon wrote:
> > On Friday 13 August 2010 16:04:53 Frank Schwidom wrote:
> > > Hi
> > > 
> > > i get the error:
> > > 
> > > {
> > > !!! Multiple package instances within a single package slot have
> > > been pulled
> > > !!! into the dependency graph, resulting in a slot conflict:
> > > 
> > > media-libs/libpng:0
> > > 
> > >   ('ebuild', '/', 'media-libs/libpng-1.4.3', 'merge') pulled in by
> > >   
> > >     >=media-libs/libpng-1.2.43-r2:0 required by ('ebuild', '/',
> > >     >'x11-libs/cairo-1.8.10', 'merge')
> > >     >=media-libs/libpng-1.4 required by ('ebuild', '/',
> > >     >'x11-libs/gtk+-2.20.1-r1', 'merge')
> > >     
> > >     (and 27 more)
> > > 
> > > }
> > > 
> > > And i wonder that it seems not to be possible to install both libs
> > > (libpng-1.2.43-r2:0, libpng-1.4) in the same time. Linux is
> > > actually able to manage this by the lib-version and links.
> > 
> > You have misread the portage output. It does not say it wants those
> > versions.
> > 
> > It says this:
> >   >=media-libs/libpng-1.2.43-r2:0
> >   >=media-libs/libpng-1.4
> > 
> > Note the greater than or equal to.
> > 
> > The limiting factor to multiple versions is not Linux, it is
> > portage. Portage will not co-install two versions in the same SLOT.
> > 
> > > Did i have overseen any gentoo switch that makes is possible? Or
> > > is there any other option?
> > 
> > This whole libpng mess was a right royal fuck up several months
> > ago. I forget the specifics but IIRC a decent solution was
> > 
> > emerge -C libpng
> > emerge libpng
> > revdep-rebuild
> > 
> > The last step takes some time to complete, there is a lot of
> > fall-out to deal with.
> > 
> > As you are only hitting this now, I assume you have a stable system
> > and are not using the masked versions of portage.
> > @preserved-rebuild would save you lots of pain, but that feature is
> > not available in stable versions of portage.
> > 
> > For more info, check the archives. There is more mail there about
> > this than you could ever possibly want to read.
> 
> I actually hit this myself yesterday.
> When emerging "libpng", it mentions a script that needs to be run. I
> would suggest running that script.
> 
> I think the following commands were the ones that led to a properly
> upgraded system. It is now working for me, but it did take quite a
> while. **
> emerge -vauD --newuse world
> lafilefixer --justfixit
> /usr/sbin/libpng-1.4.x-update.sh 
> emerge -vauD --newuse world
> revdep-rebuild -- -va
> emerge -vauD --newuse world
> **
> 
> Alternatively, you could always try to one that should always work:
> 
> emerge -vae world
> (NOTE: This will rebuild _everything_)
> 
> Btw, if you are using KDE, you might, like me, also hit issues with
> akonadi not starting (I couldn't not use it anymore)
> Post on the list if you hit it, I still have these fresh in my mind :)
> 
> --
> Joost
> 

This script is hopefully not the hack, that is said to be a problem in
the future?

http://blog.flameeyes.eu/2010/06/29/stable-users-libpng-update

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