[gentoo-user] Re: KDE 4.2 and 3.5

[Nikos Chantziaras]

Daniel D Jones wrote:
> I have KDE 3.5 and 4.1 installed and am trying to upgrade to 4.2.  I'm getting
> the following:
>
> <=kde-base/kdebase-3.5.9-r4 ("<=kde-base/kdebase-3.5.9-r4" is blocking
> kde-base/kdelibs-4.2.0)
>
> Is there an issue with 3.5 and 4.2 being installed together?  Is the above
> block a known issue that's being worked out as 4.2 is integrated into the
> stable tree?  (I was unable to find a bug filed on it or any other hits on
> Google.)

I recommend that you edit your world file by hand 
(/var/lib/portage/world) and remove everything from in there that you 
wish to unmerge.  Then run "emerge -p --depclean" and take a good look 
at the output.  Put in the world file every package listed that should 
NOT be removed.  When everything looks fine, do the final "emerge -a 
--depclean".

Take care though after that not clutter your world file again.  That 
mainly means that if you emerge some dependency of a package manually 
(for whatever reason) do so with the -1 or --oneshot option of emerge.

Note that you can put slotted packages in the world file.  For example 
if all you have in there is "kde-base/kdelibs" and you remove it, 
depclean will remove both KDE3 and well as KDE4 libs.  Simply put 
"kde-base/kdelibs:3.5" in the world file.  depclean will not remove the 
3.5.x versions that way.  Personally, I keep the 3.5 slots and an 
unslotted version:

   kde-base/kdelibs
   kde-base/kdelibs:3.5

This will provide easy updates to future 4.x versions but will not mess 
with 3.5.

I find that having a clean world file makes package management in Gentoo 
a lot easier :)