[gentoo-user] switching to non-NPTL profile

[gentoo-user] switching to non-NPTL profile

[Pawel K]

Hello

I would like to install User-Mode Linux. It requires
non-NPTL profile.
Are below steps sufficient to switch to non-NPTL
profile ?

1. Remove nptl and nptlonly flags from USE variable in
/etc/make.conf file:
USE="-nptl -nptlonly"

2. Which of the following commands should I perform
now?

emerge --newuse world
or
emerge -e world

There is a bit contradictionary information about that
at:

http://www.gentoo.org/doc/en/uml.xml
and
http://gentoo-wiki.com/NPTL

thanks for any help


 
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Re: [gentoo-user] switching to non-NPTL profile

[Patrice Bouvard]

Le Sun, 11 Feb 2007 07:23:23 -0800 (PST),
Pawel K <pawlaczus@yahoo.com> a écrit :

> Hello
> 
> I would like to install User-Mode Linux. It requires
> non-NPTL profile.

Hi !

There is a no-nptl profile there : 
/usr/portage/profiles/default-linux/x86/no-nptl

I think this is what you're looking for.
The next step is to recompile all your system.
Maybe something like `emerge -e system && emerge -e world` would suffice, but I am not sure.
A safe method is to reinstall your gentoo from scratch using a no-nptl stage-x image (i386 ?)



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Re: [gentoo-user] switching to non-NPTL profile

[Bo Ørsted Andresen]

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On Sunday 11 February 2007 16:23:23 Pawel K wrote:
> There is a bit contradictionary information about that
> at:
>
> http://www.gentoo.org/doc/en/uml.xml
> and
> http://gentoo-wiki.com/NPTL

You should of course follow the instructions at the official gentoo.org hosted 
uml doc rather than a random wiki which can be edited by anyone..

-- 
Bo Andresen

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Re: [gentoo-user] switching to non-NPTL profile

[Hans-Werner Hilse]

Hi,

On Sun, 11 Feb 2007 21:17:40 +0100
Bo Ørsted Andresen <bo.andresen@zlin.dk> wrote:

> On Sunday 11 February 2007 16:23:23 Pawel K wrote:
> > There is a bit contradictionary information about that
> > at:
> >
> > http://www.gentoo.org/doc/en/uml.xml
> > and
> > http://gentoo-wiki.com/NPTL
> 
> You should of course follow the instructions at the official gentoo.org hosted 
> uml doc rather than a random wiki which can be edited by anyone..

agreed, but I'm not quite sure if those are really sensible. Is it
really the case that a UML kernel does not run in an NPTL environmen? I
don't think so, AFAIK the UML kernel just isn't able to provide
everything to run NPTL enabled application under its hood. So when
there's a new Gentoo compiled for the UML's root file system, why
bother with recompiling the hosting environment? (Except, of course, if
one wants to use the host as a BINHOST for portage, too. But the guide
doesn't specifically suggest this.)

-hwh
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Re: [gentoo-user] switching to non-NPTL profile

[Alan McKinnon]

On Sunday 11 February 2007, Pawel K wrote:
> Hello
>
> I would like to install User-Mode Linux. It requires
> non-NPTL profile.
> Are below steps sufficient to switch to non-NPTL
> profile ?
>
> 1. Remove nptl and nptlonly flags from USE variable in
> /etc/make.conf file:
> USE="-nptl -nptlonly"
>
> 2. Which of the following commands should I perform
> now?
>
> emerge --newuse world
> or
> emerge -e world

You might get away with an 'emerge -uND world", but consider what you 
are trying to accomplish. You want to update and make a deep change to 
the most basic library on the system - glibc - and at the same time 
change the system's threading model. When done, every library that 
previously used nptl will still want to, but it won't be there. So you 
will need to do a revdep-rebuild and wait for the humunguous emerge 
that triggers to complete.

All things considered, you might as well just 'emerge -e world' anyway. 
It's likely to take not much longer and will be a mostly uneventful 
task that takes about a day or so.


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Pessimists say the glass is half empty,
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Alan McKinnon
alan at linuxholdings dot co dot za
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