Re: Why does this happen ?
Am Dienstag 26 Juni 2007 schrieb Douglas Allan Tutty:
> On Sat, Jun 23, 2007 at 11:01:05AM +0200, Hans-J. Ullrich wrote:
> > Oh sorry, I did not prezise my question corretly. I know that both
> > conflict. This is clear for me. What I want to know is, WHY such a
> > conflict happens. Why can (in my case) nexuis not access to libcurl4 and
> > the other ones stay access to libcurl3 ? This was my question, as IMO
> > both libs seem independent for me.
> >
> > On the other hand I wondered, why apt does not inhibit the deinstallation
> > of the other programs or the installation of libcurl 4. Is it, because
> > the philosophy says, in linux everything is allowed to be done and
> > controlled by root ?
> >
> > My question aimed less to the technical side, but to the philosophical
> > side.
>
> You want to install libcurl4 which conflicts with your installed
> libcurl3. Lets assume that they both contain identially named files
> that would overwrite each other on installation. They may not be
> destined for eventual coexistance so that is not planned for in their
> namespace.
>
> So apt will remove libcurl3.
>
> However, your packages A, B, and C depend on libcurl3 (which is now
> removed).
>
> So apt will remove A, B, and C.
>
> Sounds like you're running unstable. Things like this should never
> happen in stable.
>
> The maintainers for A, B, and C can't update them to work with libcurl4
> until its available. So the timeline looks like this:
>
> libcurl4 becomes available.
>
> New package D needs libcurl4.
>
> A, B, and C already exist and need libcurl3.
>
> Maintainers for A, B, and C, start to transition their packages to use
> the new libcurl4.
>
> Here's where you're at now.
>
> Eventually, A, B, C, and D will all depend on libcurl4 and libcurl3 will
> be obsolete.
>
> So philosophically, one must be philosophical about problems when
> running unstable.
>
> Doug.
Hi Doug !
Thank you very much for this explanation. This is exactly, what I wanted to
know. Yes, I am running unstable. Now I know, that this could be a normal
behaviour, but mostly in unstable.
Again: Thanks for the help. It explains a lot of things for me.
Regards
Hans
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