Re: [gentoo-dev] ROOT variable (was: Creating multiple "installations" on the same host)

[Paul de Vrieze]

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On Wednesday 24 March 2004 10:35, John Nilsson wrote:
> On Wed, 2004-03-24 at 01:39, Chris Gianelloni wrote:
> > > Anyway, I'll continue with this and report problems as I find
> > > them. Is this better discussed on the gentoo-portage-dev list?  Or
> > > should I just file bugs in Gentoo Bugzilla without discussion?
> > > Or...?
> >
> > Well, in this case discussion has saved an unnecessary bug being
> > filed, so I would say that it is a good thing.  I'm pretty
> > interested in what you're doing and saying, and I think quite a few
> > others are judging by the other responses.  Also, while this is
> > mostly portage related, I think it also would be useful for catalyst
> > and even for people doing full-fledged virtual services.  I think it
> > should stay on -dev provided it doesn't get too specific to portage
> > alone.
>
> I just want to throw in my thoughts.
>
> Can we have separate variables for the following?
>
> * Build system portage data
>  - portage overlay
>  - edb
>  - make.conf
> * Build system root
>
> * Host system portage data
>  - portage overlay
>  - edb
>  - make.conf
> * Host system root
>
> Ultimately it should be possible to, with a single installation of
> portage, maintain several systems that lacks a compiler, libraries and
> portage.
>
> Does the separation of depend and rdepend support a gcc-less
> installation?

Yes, there are multiple ways:
- - binary packages
- - transferring files from a ROOT based solution.

The ROOT based solution works conditionally: All static libraries on the 
building system need to be compiled with flags that run on all secondary 
systems. Preferably also the building system contains the same set of 
libraries as the secondary systems. If the library sets are not the same 
all kinds of subtle library related bugs could appear. As DEPEND is 
verified on the building system it should be possible to have such a 
consistent setup. Don't expect wonders though, binary compatibility is 
hard (the only solution is packaged releases that have ensured binary 
compatibility and en-mass updates)

Paul

- -- 
Paul de Vrieze
Gentoo Developer
Mail: pauldv@g.o
Homepage: http://www.devrieze.net
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