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  • From: Arwed von Merkatz <v.merkatz AT gmx.net>
  • To: sm-discuss AT lists.ibiblio.org
  • Subject: Re: [SM-Discuss] i386 ISO
  • Date: Thu, 6 Jan 2005 16:22:36 +0100

On Thu, Jan 06, 2005 at 03:52:44PM +0100, Benoit PAPILLAULT wrote:
> Arwed von Merkatz a écrit :
> >I agree with that. It's no problem switching a linuxthreads system to
> >NPTL, but it is almost impossible to switch from NPTL back, as binaries
> >compiled with NPTL won't work anymore, so the ISO shouldn't use NPTL.
>
> The current glibc spell use a different glibc source code based on
> whether NPTL support is selected or not.
>
> Without NPTL support : glibc-2.3.2 is selected.
> With NPTL support : glibc-20040628 is selected (which claims to be
> 2.3.3 when installed).
>
> Since glibc use symbol versioning a lot, both versions are incompatible,
> except that 2.3.3 is backward compatible with 2.3.2. For this reason,
> upgrading from a system without NPTL to a system with NPTL is possible,
> whereas the opposite is impossible.
>
> If we used the same snapshot for both, I /think/ it would be possible to
> change from NPTL support to no support.

No, binaries compiled with NPTL glibc can't be used on a non-NPTL
system, whether it's the same glibc snapshot or not.

--
Arwed v. Merkatz Source Mage GNU/Linux developer
http://www.sourcemage.org




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