Re: Cross-building for older releases on trixie broken?

[Uladzimir Bely <ubely@ilbers.de>]

On Thu, 2025-09-18 at 07:49 +0200, 'Jan Kiszka' via isar-users wrote:
> Hi,
> 
> for some days, I'm playing with a trixie-based kas container
> (currently
> available via kas-isar:next from upstream), and I it seems I ran into
> an
> issue that might be isar-related: Building e.g. qemu-arm64:bookworm
> with
> that container fails:
> 
> > Setup apt archive
> > -----------------
> > 
> > Merged Build-Depends: debhelper-compat (= 13), build-
> > essential:amd64,
> crossbuild-essential-arm64:amd64, apt-utils:amd64, libc-dev:arm64,
> libstdc++-dev:arm64
> > Filtered Build-Depends: debhelper-compat (= 13),
> build-essential:amd64, crossbuild-essential-arm64:amd64,
> apt-utils:amd64, libc-dev:arm64, libstdc++-dev:arm64
> > dpkg-deb: building package 'sbuild-build-depends-main-dummy' in
> '/build/sshd-regen-keys-QAjoa6/resolver-ruuPrM/apt_archive/sbuild-
> build-depends-main-dummy.deb'.
> > Ign:1 copy:/build/sshd-regen-keys-QAjoa6/resolver-
> > ruuPrM/apt_archive
> ./ InRelease
> > Get:2 copy:/build/sshd-regen-keys-QAjoa6/resolver-
> > ruuPrM/apt_archive
> ./ Release [609 B]
> > Ign:3 copy:/build/sshd-regen-keys-QAjoa6/resolver-
> > ruuPrM/apt_archive
> ./ Release.gpg
> > Get:4 copy:/build/sshd-regen-keys-QAjoa6/resolver-
> > ruuPrM/apt_archive
> ./ Sources [690 B]
> > Get:5 copy:/build/sshd-regen-keys-QAjoa6/resolver-
> > ruuPrM/apt_archive
> ./ Packages [733 B]
> > Fetched 2032 B in 0s (0 B/s)
> > Reading package lists...
> > Reading package lists...
> > 
> > Install main build dependencies (apt-based resolver)
> > ----------------------------------------------------
> > 
> > Installing build dependencies
> > Reading package lists...
> > Building dependency tree...
> > Reading state information...
> > E: Unable to locate package sbuild-build-depends-main-dummy
> > apt-get failed.
> > E: Package installation failed
> > Not removing build depends: cloned chroot in use
> > Reading package lists...
> > Building dependency tree...
> > Reading state information...
> > E: Unable to locate package sbuild-build-depends-main-dummy
> > apt-get failed.
> > 
> 
> That was part of the sshd-regen-keys package build, but all package
> seem
> to fail this way.
> 
> I suspect we are improperly using the host dpkg tooling here, rather
> than that from the target distro (see other recent discussions we had
> here)...
> 
> Jan
> 
> -- 
> Siemens AG, Foundational Technologies
> Linux Expert Center

Hello, Jan.

I took a quick look at this. It seems cross-building is broken for
trixie host only for bookworm target. Buster, bullseye and trixie
targets looks OK.

The reason is still not clear for me - some failure happens with
apt/dependencies, even before dpkg-buildpackage is called.

Will try to debug.


-- 
Best regards,
Uladzimir.

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