Re: [PATCH] builddeb: remove unneeded explicit Architecture

From: Tzafrir Cohen
Date: Sun Sep 09 2012 - 07:55:44 EST

On Fri, Sep 07, 2012 at 02:02:09AM +0200, maximilian attems wrote:
> On Thu, 06 Sep 2012, Tzafrir Cohen wrote:
> >
> > Works for the case I presented.
> Michal please care to queue previous v2 patch with
> Tested-by: Tzafrir Cohen <tzafrir.cohen@xxxxxxxxxx>
> to kope with that cross building regression since
> the linux headers got added to deb-pkg target.
> > Now I remove the explicit setting of KBUILD_DEBRCH:
> and here lies the error.
> > $ rm -rf debian
> > $ make ARCH=arm KBUILD_IMAGE=uImage deb-pkg
> >
> > ...
> >
> > dpkg-gencontrol: error: current host architecture 'armhf' does not
> > appear in package's architecture list (armel)
> >
> > My host architecture is amd64. This is actually the build architecture.
> > dpkg-gencontrol uses Dpkg::Arch::get_host_arch().
> >
> > $ perl -MDpkg::Arch -e 'print Dpkg::Arch::get_host_arch()."\n"'
> > amd64
> >
> > $ CC=/usr/bi/narm-linux-gnueabi-gcc perl -MDpkg::Arch -e 'print Dpkg::Arch::get_host_arch()."\n"'
> > armel
> >
> > $ CC=/usr/bin/arm-linux-gnueabihf-gcc perl -MDpkg::Arch -e 'print Dpkg::Arch::get_host_arch()."\n"'
> > armhf
> >
> > $ DEB_HOST_ARCH=whatever perl -MDpkg::Arch -e 'print Dpkg::Arch::get_host_arch()."\n"'
> > whatever
> >
> > Is it OK to use that perl one-liner as the default instead of the
> > architecture guessing case?
> In any case that would be a follow up, but I'm not fond of that perl/dpkg
> magic plus supporting DEB_ variables.

This magic is lifted from current dpkg-gencontrol. Is there any better
way to get it?

> I think for linux it is preferable
> to have it based on UTS_MACHINE. Thus I think your testcases aren't valid,

Well, my current build script is:

# YOu need to have one of the following unremmed to avoid a
# dpkg-gencontrol error:
export KBUILD_DEBARCH=armhf # Unrem this for armhf
#export DEB_HOST_ARCH=armel # Or this for armel
exec make ARCH=arm KBUILD_IMAGE=uImage deb-pkg "$@"

Clearly on my build toolchain I must set DEB_HOST_ARCH in some cases. So
DEB_ variables are already in there. Without it it will give me an error
for trying to build

> and also you neglected the following one:
> make KBUILD_DEBARCH=i386 deb-pkg # i386 userland with amd64 linux

I'm not sure I follow. If the packagees are to be installed on a i386
system, they are all to be considered i386, right? The linux-image
package as well. The same as (the i386 variant).

Setting KBUILD_DEBARCH does not change the building of the files in any
way. It only changes the package's metadata.

Maybe set DEB_HOST_ARCH from KBUILD_DEBARCH if the latter was set?

Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen@xxxxxxxxxx
+972-50-7952406 mailto:tzafrir.cohen@xxxxxxxxxx iax:guest@xxxxxxxxxxxxxxxx/tzafrir
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