Subject: Re: config & endianness
To: Garrett D'Amore <email@example.com>
From: Quentin Garnier <firstname.lastname@example.org>
Date: 03/06/2006 17:55:33
Content-Type: text/plain; charset=us-ascii
On Mon, Mar 06, 2006 at 08:46:03AM -0800, Garrett D'Amore wrote:
> Quentin Garnier wrote:
> > On Mon, Mar 06, 2006 at 08:27:36AM -0800, Garrett D'Amore wrote:
> > =20
> >> Hmm.... we now have some kernel configs in evbmips that do not make
> >> sense for either big or little endian.
> >> * OMSAL and MTX-1 are always little endian
> >> * forthcoming ATHEROS AR531x based systems will always be big endi=
> >> * DBAU1XXX can be either endian (jumper selectable)
> >> * Malta/PB1XXX? probably also jumper selectable
> >> Is there a way to establish stuff in config so that:
> >> 1) an attempt to build a kernel with endianness that doesn't make
> >> sense fails in config(8), AND
> >> =20
> > I don't really understand that. How is config(1) supposed to know what
> > endianness it is supposed to build for? You want to flag it when it is
> > compiled? Currently, config(1) is arch-agnostic, i.e. you can use the
> > same binary for any arch.
> > =20
> I'm not talking about config(1) itself, rather I'm talking about having
> the machinery in the kernel configuration files for this. So if you try
> to build an evbmips-eb kernel using an MTX-1 config, it should fail.=20
> Because this architecture (MTX-1) can *only* run little endian.
But at which point do you know you're building an evbmips-eb kernel?
If you want the information in the configuration files to conflict, it
has to conflict with *something*.
At the moment the user (or build.sh) does:
$ config MYMIPSBOARD
how is it supposed to know whether the rest of the toolchain uses the
Quentin Garnier - email@example.com - cube@NetBSD.org
"When I find the controls, I'll go where I like, I'll know where I want
to be, but maybe for now I'll stay right here on a silent sea."
KT Tunstall, Silent Sea, Eye to the Telescope, 2004.
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