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  • From: Eric Sandall <eric AT sandall.us>
  • To: sm-discuss AT lists.ibiblio.org
  • Subject: Re: [SM-Discuss] i386 ISO
  • Date: Thu, 6 Jan 2005 09:09:23 -0800

Quoting Benoit PAPILLAULT <benoit.papillault AT sourcemage.org>:
> 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.

The glibc in devel does exactly that, but has a few problems currently. See
the
WIP if you'd like to help.

-sandalle

--
Eric Sandall | Source Mage GNU/Linux Developer
eric AT sandall.us PGP: 0xA8EFDD61 | http://www.sourcemage.org/
http://eric.sandall.us/ | SysAdmin @ Inst. Shock Physics @ WSU
http://counter.li.org/ #196285 | http://www.shock.wsu.edu/

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