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From: Phil Blundell <pb@pbcl.net>
To: Khem Raj <raj.khem@gmail.com>
Date: Mon, 16 Sep 2013 21:52:36 +0100
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Subject: Re: [PATCH] linux-libc-headers: Add big warning about antisocial behaviour
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On Mon, 2013-09-16 at 09:24 -0700, Khem Raj wrote:
> On Sat, Sep 14, 2013 at 12:19 AM, Phil Blundell <pb@pbcl.net> wrote:
> > On Fri, 2013-09-13 at 21:24 -0700, Khem Raj wrote:
> >> There are cases where we have bsps with 2.6.3x kernels and libc
> >> compiled against 3.10 assumes syscalls
> >
> > That is a bug in glibc.  It should not be doing that unless configured
> > --enable-kernel=3.10.x (and this is the whole point of the
> > --enable-kernel option).  If it's assuming 3.10.x syscalls under
> > --enable-kernel=2.6.x then it is broken and should be fixed.
> >
> 
> we have OLDEST_KERNEL = "2.6.16" and thats not a problem. However one
> case where it showed up was when building udev > 164 with kernels
> where accept4 call was not wired for arm e.g. since udev looked up
> definition of SOCK_CLOEXEC which it found but that 2.6.32 kernel
> really did not support it.

That sounds slightly different to the problem you were originally
describing ("libc compiled against 3.10") but I think the answer is
basically still the same: it is a bug in udev, and udev ought to be
fixed.

p.