Re: [gentoo-dev] sys-build

Andreas Schweitzer wrote:

> On Sat, Jan 27, 2001 at 06:07:37PM +0100, Achim Gottinger wrote:
> > drobbins@g.o wrote:
> >
> > > On Sat, Jan 27, 2001 at 04:29:53PM +0100, Achim Gottinger wrote:
> > > > Hi Guys,
> > > >
> > > > Today I build a working sys-build package that includes all the packages
> > > > in sys-build, baselayout and portage.
>
> Sounds very interesting.
> Where can I find it to try it out ?

Not yet uploaded.

>
>
> > > > This means we now have an environment to which we can chroot and build
> > > > everithing else within. (I tested all sys-packages with success, so the
> > > > rest should work too).
> > > > I used exactly the same dir-layout as in the corresponding sys-*
> > > > packages, so nothink statically linked remains
> > > > after the corresponding packages are merged over.
> > > > It is bigger(130MB, 28MB bzipped) than the 50MB I expectend it to be,
> > > > maybe it can be reduced to around 100MB. :-/.
> > > > What can we do now?
> > > >
> > > > 1. This build sytsem can be placed on a bootable cd together with the
> > > > sources and the ebuild-tree. We can then
> > > > unpack the build.tbz2 instead of the sys.tbz2 to our target partition,
> > > > chroot there and build everything.
> > >
> > > OK, I'm very confused, so please explain how this works.  Also, what
>
> me too :-)
>
> > > prevented us from just extracting sys.tbz2 and chrooting to /mnt/gentoo
> > > and building everything?
> >
> > Ok, you can use sys.tbz2 too for that but build.tbz2 contains only the
> > minimum required stuff, we can even
> > place gcc and binutils in separate TARGET dependent packages, so it should be
> > possible to make one cd that
> > gives you the ability to build for all our intel targets.
>
> But /mnt/gentoo will contain the compiler etc. ?

Yes you unpack build.tbz2 to /mnt/gentoo first.

> And it will be overwritten ?

Yes because build.tbz2 contains reduced to a minimum required and statically
linked versions of packages .
I used static linking because I want to be able to build the sys-build packages in
one step without manually
copying shared libraries from the system I build on.
This offers the possibility to build you packages on every linux-system with a
recent enogh kernel.
You just have to unpack build.tbz2 to a temp dir mount the source-cd or a
source-partition, chroot there
and build as described below.

>
> Or at least some of the binaries in /mnt/gentoo ?
>
> > > And I assume that sys-build has nothing extra.  For example, no star, no
> > > iptables, etc?  OK, I'm looking at /usr/portage/sys-build as I should
> > > have done in the first place.  Beautiful :)  But please explain how the
> > > build process is supposed to work (maybe by typing in example command-line
> > > build install).
> >
> > Ok imagine you have a list of required packages that is sorted in order of
> > dependencies
> > and a filestructure on the cd that corresponds to that under /usr/portage
> >
> > ---------------------------------------
> > Mkdir /mnt/gentoo/usr/portage
> > mount /dev/cdrom /mnt/gentoo/usr/portage
> > cp package-list /mnt/gentoo/root
> > vi /mnt/gentoo/etc/make.conf
> > chroot /mnt/gentoo
> > source /etc/profile
> > cd /usr/portage
> > for i in 'cat /root/package-list''
> > do
> >     ebuild $i merge
> > done
> > ---------------------------------------
>
> A bit clearer. But again, this requires binaries in /mnt/gentoo
> that you put there from unpacking build.tbz2 - right ?

Yes

>
>
> And there are no sources in build.tbz2 ?

No

>
> Those should also be on the CDROM ?
> Alternatively, include wget and rsync, and the sources can
> be grabbed from the net (if somebody wants to get them from there).

wget is on the boot-cd image, rsync not yes. All the required binaries and all
kernel-network/nfs modules to
set-up a network enviroment are on the bootcd-image. So it should not be to
difficult to add that option too.

achim~

>
>
> Still a newbie to gentoo - but it looks promising !
>
> Cheers
> Andreas
>
> --
> Department of Physics & Astronomy  and  Center for Simulational Physics
> University of Georgia                          Phone ++1 [phone]
> Athens, GA 30602-2451                            Fax ++1 [phone]
> USA                               http://dilbert.physast.uga.edu/~andy/
>
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