[gentoo-user] Different install prefix - howto ?

[gentoo-user] Different install prefix - howto ?

[Helmut Jarausch]

Hi,

I'd like to install an experimental package with a different prefix, say
/usr/local/test
What should I write into the ebuild file?

Many thanks for a hint,

Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

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Re: [gentoo-user] Different install prefix - howto ?

[Hans-Werner Hilse]

Hi,

On Fri, 06 Oct 2006 10:21:05 +0200 (CEST) Helmut Jarausch
<jarausch@igpm.rwth-aachen.de> wrote:

> I'd like to install an experimental package with a different prefix,
> say /usr/local/test
> What should I write into the ebuild file?

I don't think the ROOT environment variable when emerging is what you
want. I think you can just append "--prefix=/usr/local/test" to the
call to "econf". All of this assumes usage of autoconf, of course.
Another common approach is to set DESTDIR to ${D}/usr/local/test for
"make install".

See http://www.gentoo.org/proj/en/devrel/handbook/handbook.xml?part=2&chap=1

-hwh
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Re: [gentoo-user] Different install prefix - howto ?

[Bo Ørsted Andresen]

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On Friday 06 October 2006 13:08, Hans-Werner Hilse wrote:
> > I'd like to install an experimental package with a different prefix,
> > say /usr/local/test
> > What should I write into the ebuild file?
>
> I don't think the ROOT environment variable when emerging is what you
> want. I think you can just append "--prefix=/usr/local/test" to the
> call to "econf". All of this assumes usage of autoconf, of course.
> Another common approach is to set DESTDIR to ${D}/usr/local/test for
> "make install".
>
> See
> http://www.gentoo.org/proj/en/devrel/handbook/handbook.xml?part=2&chap=1

Probably a better a reference is [1]. I'm not sure why you don't think he 
wants the ROOT var. Also ${D} isn't where it's going to be installed to (in 
the ebuild qmerge sense - see `man ebuild'). It's where the image is going to 
be installed (the ebuild install sense - again see `man ebuild`). Also it's a 
var to be used internally in the ebuild only (which I assume you know). If I 
am correct about what he wants then the point is that there is no need to 
edit the ebuild file (otherwise it's a bug).

[1] http://dev.gentoo.org/~plasmaroo/devmanual//ebuild-writing/variables/

-- 
Bo Andresen

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Re: [gentoo-user] Different install prefix - howto ?

[Hans-Werner Hilse]

Hi,

On Fri, 6 Oct 2006 14:25:47 +0200 Bo Ørsted Andresen
<bo.andresen@zlin.dk> wrote:

> On Friday 06 October 2006 13:08, Hans-Werner Hilse wrote:
> > > I'd like to install an experimental package with a different
> > > prefix, say /usr/local/test
> > > What should I write into the ebuild file?
> >
> > I don't think the ROOT environment variable when emerging is what
> > you want. I think you can just append "--prefix=/usr/local/test" to
> > the call to "econf". All of this assumes usage of autoconf, of
> > course. Another common approach is to set DESTDIR to
> > ${D}/usr/local/test for "make install".
> 
> Probably a better a reference is [1]. I'm not sure why you don't
> think he wants the ROOT var.

Because it didn't sound like he was trying to set up a chroot
environment just for that package but rather make shure its installed
files don't cludder /usr. If ROOT is set, that will also emerge all
RDEPENDs into that.

> Also ${D} isn't where it's going to be
> installed to (in the ebuild qmerge sense - see `man ebuild'). It's
> where the image is going to be installed (the ebuild install sense -
> again see `man ebuild`).

Well, I'm not an English master, but I find your statement irritating.
The image gets installed into the real ROOT as set when emerging, i.e.
"/" in most cases (that's what qmerge does). The ebuild itself installs
what it has to install _into_ the image. So in terms of ebuild writing,
${D} is where you should install to. portage will care (ebuild qmerge)
for moving that over to the real ROOT.

> Also it's a var to be used internally in the
> ebuild only (which I assume you know). If I am correct about what he
> wants then the point is that there is no need to edit the ebuild file
> (otherwise it's a bug).

That's probably where our understanding differs: I think the question
was about ebuild writing or modification.

-hwh

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Re: [gentoo-user] Different install prefix - howto ?

[Bo Ørsted Andresen]

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On Friday 06 October 2006 14:50, Hans-Werner Hilse wrote:
[SNIP]
> > I'm not sure why you don't
> > think he wants the ROOT var.
>
> Because it didn't sound like he was trying to set up a chroot
> environment just for that package but rather make shure its installed
> files don't cludder /usr. If ROOT is set, that will also emerge all
> RDEPENDs into that.

Hmm... By reading the thread again seems you're right. I blame lack of sleep.

> > Also ${D} isn't where it's going to be
> > installed to (in the ebuild qmerge sense - see `man ebuild'). It's
> > where the image is going to be installed (the ebuild install sense -
> > again see `man ebuild`).
>
> Well, I'm not an English master, but I find your statement irritating.
[SNIP]

It was because I managed to overlook the important part. I just read: "set 
DESTDIR to ${D}". Sorry.. Thanks for clearing this. :)

[SNIP]

At least we agree now... And just for the OP: The ROOT var changes the 
location of the vdb (/var/db/pkg) too. It contains info about what packages 
are installed etc... So the main system (when the ROOT var isn't set - it 
defaults to '/') won't even know that a package installed with the ROOT var 
set to something else than '/' is installed...

-- 
Bo Andresen

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