Re: [gentoo-user] emerge conflict

["J. Roeleveld" <joost@antarean.org>]

On Friday 13 August 2010 15:36:23 Daniel Wagener wrote:
> 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

Eeerh....
Not sure, guess I stopped reading too soon as I managed to get it to appear to 
be working...

Anyway, am currently doing a " emerge -vae world " as I want to get it all 
compiled using GCC 4.4. Guess that should 'fix' whatever damage that script 
does?

--
Joost