glibc-2.10.1 make check fails

Gilles Espinasse g.esp at free.fr
Tue May 26 08:17:51 PDT 2009


----- Original Message ----- 
From: "Dan Nicholson" <dbn.lists at gmail.com>
To: "LFS Developers Mailinglist" <lfs-dev at linuxfromscratch.org>
Sent: Tuesday, May 26, 2009 3:36 PM
Subject: Re: glibc-2.10.1 make check fails


> On Sun, May 24, 2009 at 10:51 PM, Bryan Kadzban
> <bryan at kadzban.is-a-geek.net> wrote:
> > Bruce Dubbs wrote:
> >> --enable-kernel=VERSION compile for compatibility with kernel not older
than
> >> VERSION
> >
> > Yes: abort any program at startup if the current kernel version is less
> > than VERSION, and also remove any workarounds included in the glibc
> > sources for kernels older than VERSION (if any).
> >
> >> but I found
http://www.mail-archive.com/arch-dev-public@archlinux.org/msg08016.html
> >>
> >> which says: The minimum kernel version required for glibc was bumped
from
> >> 2.6.16 to 2.6.18
> >
> > That's an Arch decision (made by their maintainer), not something that
> > applies to glibc itself. :-) See:
> >
> >
http://repos.archlinux.org/viewvc.cgi/glibc/repos/core-x86_64/PKGBUILD?r1=36985&r2=39100
> >
> > for the actual change in their PKGBUILD script. (The section labeled
> > "line 62".)
>
> A more authoritative measure here would be to follow fedora since they
> are the glibc maintainers. Unfortunately, there's no real rationale,
> but their version is 2.6.18 made with this change:
>
>
http://cvs.fedoraproject.org/viewvc/rpms/glibc/devel/glibc.spec?view=diff&r1=1.376&r2=1.377
>
> Probably would be best to investigate why that is before making a
> change like that.
>
the reason of 2.6.18 is explain there
http://www.redhat.com/archives/rhl-devel-list/2009-January/msg01813.html
that's RHEL-5 kernel related.

The size argument does matter that much, in glibc-2.3 announce with
enable-kernel=2.4.0, the difference was 1%. Speed difference may be bigger.
http://sourceware.org/ml/libc-alpha/2002-10/msg00048.html

Drepper had answered (in an old message that I no more find) from to a
breakage with enable-kernel=2.6.0 that there is no more a reason to stick to
2.6.0.
For this reason, we moved in 2007 to --enable-kernel=2.6.5 since nobody
should still run a kernel that old.


Gilles




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