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Re: Need Help building glibc with NPTL support for ARM Linux 2.4.20
- From: "Carlos O'Donell" <carlos at systemhalted dot org>
- To: "Andrew Chalmers" <achalmers at ellex dot com>
- Cc: "Mike Frysinger" <vapier at gentoo dot org>, libc-help at sourceware dot org
- Date: Tue, 3 Jun 2008 08:50:54 -0400
- Subject: Re: Need Help building glibc with NPTL support for ARM Linux 2.4.20
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On Tue, Jun 3, 2008 at 3:43 AM, Andrew Chalmers <firstname.lastname@example.org> wrote:
> Are you sure NPTL requires linux-2.6? I've seem numerous reference on the
> net to NPTL under linux 2.4. My understanding is that 2.4.18 or 2.4.20
> onwards includes the necessary features to support NPTL. But I cannot find
> any confirmation of this anywhere.
You need 2.6.16 at a minimum.
CodeSourcery has documented the key requirements here:
"ARM Linux Kernel Versions for Sourcery G++ 4.1/4.2"
> Will I have any more luck building the tool chain with 2.6 headers anyway?
> Which versions should I use?
As high a version of kernel headers as possible. This allows glibc to
make use of newer features at run-time.
> I've seen it written that you can build glibc against a newer version of the
> kernel headers than the target kernel. Would that work if you build against
> 2.6 headers and run 2.4.20 on the target? (My gut feel is that something is
> bound to break.)
The 2.4 kernel is still not new enough to provide all the support
required for NPTL.
> Is there a NPTL support page that works? The link form the various copies of
> the original NPTL announcement on the net, all give me a unresponsive Redhat
What do you mean by "support page?" NPTL is part of glbic. This is the
authoritative mailing list :-) You need a new kernel.