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Mathieu Benoit f26a6a7115 [FIX] stage 2 could not clone, its pacman had no user, and it installed conflicts
Three gaps in the driver, all found by packages advancing to their next obstacle.

  no checkout for python-jinja

Stage 2 could only rebuild what stage 1 had cloned -- wrong for every package
stage 2 builds and stage 1 cannot. libxslt was the first (Ubuntu's libxml2 is too
old to configure it), the Python set followed. They are named in
CHROOT_STAGE2_PKGS because only this stage can produce them, and this stage would
not fetch them. It clones now, pinned to upstream.lock.

  error: problem setting DownloadUser 'alpm' (user does not exist)

The rebuilt pacman drops privileges for downloads to a user created by
sysusers.d, which `pacman --root` does not run -- the same reason the CA bundle
was never generated. Nothing in the chroot downloads anything.

  :: zlib-ng-compat and zlib are in conflict

zlib-ng produces zlib-ng-compat, correct and belonging in repo2, uninstallable
beside the zlib this chroot uses. CHROOT_EXCLUDE already said so for populate;
the same list now applies to the per-package install.

--- FR ---

Trois lacunes du pilote, toutes révélées par des paquets parvenus à leur obstacle
suivant.

  no checkout for python-jinja

L'étage 2 ne savait reconstruire que ce que l'étage 1 avait cloné — faux pour
tout paquet que l'étage 2 bâtit et que l'étage 1 ne peut pas. libxslt fut le
premier (le libxml2 d'Ubuntu est trop ancien), l'ensemble Python a suivi. Ils
figurent dans CHROOT_STAGE2_PKGS parce que seul cet étage les produit, et cet
étage refusait de les chercher. Il clone désormais, épinglé sur upstream.lock.

  error: problem setting DownloadUser 'alpm' (user does not exist)

Le pacman reconstruit abaisse ses privilèges vers un utilisateur créé par
sysusers.d, que `pacman --root` n'exécute pas — la raison même pour laquelle le
faisceau de certificats n'était jamais généré. Rien ne télécharge dans ce chroot.

  :: zlib-ng-compat et zlib sont en conflit

zlib-ng produit zlib-ng-compat, juste et à sa place dans repo2, ininstallable à
côté du zlib de ce chroot. CHROOT_EXCLUDE le disait déjà pour le peuplement ; la
même liste vaut maintenant pour l'installation par paquet.

Assisted-by: Claude Opus 5
2026-08-23 18:38:46 -04:00
.github/workflows making the house a home 2026-01-27 23:26:31 +01:00
arch-kernel making the house a home 2026-01-27 23:26:31 +01:00
boot making the house a home 2026-01-27 23:26:31 +01:00
patches [FIX] stage 2 could not clone, its pacman had no user, and it installed conflicts 2026-08-23 18:38:46 -04:00
scripts [FIX] stage 2 could not clone, its pacman had no user, and it installed conflicts 2026-08-23 18:38:46 -04:00
.env.example [ADD] upstream.lock, and keep the machine out of the repository 2026-08-22 22:52:04 -04:00
.gitignore making the house a home 2026-01-27 23:26:31 +01:00
CODEOWNERS making the house a home 2026-01-27 23:26:31 +01:00
Containerfile making the house a home 2026-01-27 23:26:31 +01:00
LICENSE use arch kernel patches 2025-06-02 21:53:33 +02:00
Makefile making the house a home 2026-01-27 23:26:31 +01:00
README.md making the house a home 2026-01-27 23:26:31 +01:00
RELAIS.md [ADD] upstream.lock, and keep the machine out of the repository 2026-08-22 22:52:04 -04:00
TODO.md [FIX] help2man was uninstallable, which stopped the whole pass 2026-08-21 00:33:07 -04:00

Arch Linux s390x

A port of Arch Linux to IBM s390x mainframe architecture with systemd support.

Boots a full Arch Linux system on IBM mainframes (or QEMU s390x emulation) using a hybrid build: cross-compilation for the kernel, native s390x compilation on z/VM for userspace.

Quick Start

make container        # build dev container (first time)
cp .env.example .env  # configure z/VM access
make all              # build kernel + initramfs + systemd
make test-systemd     # boot it

What Works

  • Arch Linux kernel 6.18.6-arch1 with Arch patches, cross-compiled
  • Initramfs via modified mkinitcpio
  • Static busybox built natively on z/VM, 2.3MB
  • Root filesystem with ext4, switch_root to real rootfs
  • Systemd as PID 1

Pacman, bash, and GNU coreutils are not yet ported.

Build System

The build uses two tiers:

Cross-compilation (x86_64 host): Kernel is built in a Fedora 43 container with s390x-linux-gnu-gcc. Initramfs is generated with a patched mkinitcpio that handles cross-architecture binary injection.

Native compilation (s390x z/VM): Busybox and systemd must be built on real s390x hardware. The z/VM system runs RHEL 9.6 with GCC 11.5.0. Scripts handle SSH deployment and retrieval automatically via .env configuration.