linux-kernel - Re: [PATCH 1/1] deb-pkg: fix cross-compile build

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Date:	Thu, 5 May 2011 10:10:31 -0700
From:	Nuno Subtil <subtil@...il.com>
To:	Robert Gordon <robert@...enroomsoftware.com>
Cc:	maximilian attems <max@...o.at>, Michal Marek <mmarek@...e.cz>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] deb-pkg: fix cross-compile build

This patch is not meant to fix that case, only the case where
KBUILD_DEBARCH is used.

KBUILD_DEBARCH seems to be meant to be used as an override for what
Debian wants to see as the target architecture. Arguably, the right
thing to do here might be to do the same arch detection sequence
that's done in create_package(), which looks at UTS_MACHINE first and
the KBUILD_DEBARCH override after that (though I'm not entirely sure).

This patch only adds the KBUILD_DEBARCH override, but that is still
better than the current situation. I can easily get the rest in later
if needed.

Nuno

On Thu, May 5, 2011 at 08:42, Robert Gordon
<robert@...enroomsoftware.com> wrote:
> On 05/05/2011 02:07 AM, maximilian attems wrote:
>> On Wed, May 04, 2011 at 10:48:07PM +0200, Michal Marek wrote:
>>> Adding Maks to CC.
>> thanks, this one looks, good please disguard the other patch.
>>
>>> On Tue, May 03, 2011 at 10:59:10PM -0700, Nuno Subtil wrote:
>>>> When generating the header package, scripts/package/builddeb was inferring the
>>>> target architecture by looking at the output of dpkg --print-architecture. This
>>>> allows KBUILD_DEBARCH to override that.
>>>>
>>>> Signed-off-by: Nuno Subtil <subtil@...il.com>
>> Acked-by: maximilian attems <max@...o.at>
>> --
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> Greetings,
>
> Compile breaks when using the following command:
>    fakeroot make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- deb-pkg
>
> With 'set -x' in scripts/package/builddeb, the relevant output is:
>    + '[' -n '' ']'
>    ++ dpkg --print-architecture
>    + arch=i386
> This indicates that KBUILD_DEBARCH is not set.
>
> The debian/control file is written with the following section:
>    Package: linux-headers-2.6.39-rc5+
>    Provides: linux-headers, linux-headers-2.6
>    Architecture: i386
>    Description: Linux kernel headers for 2.6.39-rc5+ on i386
>     This package provides kernel header files for 2.6.39-rc5+ on i386
>
> This produces the following error output:
>    + forcearch=-DArchitecture=armel
>    + dpkg-gencontrol -isp -DArchitecture=armel
> -plinux-headers-2.6.39-rc5+ -P/opt/kernel-linus/linux-2.6/debian/hdrtmp
>    dpkg-gencontrol: error: current host architecture 'armel' does not
> appear in package's architecture list (i386)
>
> Regards,
> Robert
>
>
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