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Mathieu Benoit 75cff944a8 [FIX] binutils records a usr/lib64 path, and cmake deletes html it did not make
pacman refused the rebuilt binutils:

  binutils: <root>/usr/lib64 exists in filesystem (owned by filesystem)
  binutils: <root>/usr/lib64/libiberty.a exists in filesystem

--libdir=/usr/lib was not enough. libiberty installs into
$(libdir)$(MULTIOSSUBDIR), and gcc reports ../lib64 for
-print-multi-os-directory on s390x. In the installed system that resolves
through the symlink filesystem now provides, so the file lands in /usr/lib --
but pkgdir has no symlink, so make creates a real pkg/usr/lib64/ and makepkg
records the literal path. The two fixes are not alternatives: the symlink is what
keeps meson and cmake choosing lib, and this moves the one file that still writes
through the multi-os subdirectory.

cmake is the eleventh instance of removing a documentation build and leaving its
cleanup: with Sphinx off there is no html, and the PKGBUILD deletes _sources from
it. rm -rf rather than deleted -- on a machine with Sphinx it is real.

The binutils hook also assumed package_binutils(). binutils is not a split
package; its own assertion caught that.

--- FR ---

pacman a refusé le binutils reconstruit :

  binutils: <root>/usr/lib64 exists in filesystem (owned by filesystem)
  binutils: <root>/usr/lib64/libiberty.a exists in filesystem

--libdir=/usr/lib ne suffisait pas. libiberty s'installe dans
$(libdir)$(MULTIOSSUBDIR), et gcc annonce ../lib64 pour
-print-multi-os-directory sur s390x. Dans le système installé cela se résout par
le lien que filesystem fournit désormais, donc le fichier atterrit dans
/usr/lib — mais pkgdir n'a pas de lien : make crée un vrai pkg/usr/lib64/ et
makepkg enregistre le chemin littéral. Les deux correctifs ne sont pas des
alternatives : le lien est ce qui fait choisir lib à meson et cmake, et celui-ci
déplace le seul fichier qui écrive encore par le sous-répertoire multi-os.

cmake est la onzième occurrence du retrait d'une documentation sans son nettoyage :
sans Sphinx il n'y a pas de html, et le PKGBUILD en supprime _sources. rm -rf
plutôt que supprimé — sur une machine dotée de Sphinx, il est réel.

Le hook binutils supposait aussi package_binutils(). binutils n'est pas un paquet
scindé ; sa propre assertion l'a arrêté.

Assisted-by: Claude Opus 5
2026-08-23 22:05:26 -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] binutils records a usr/lib64 path, and cmake deletes html it did not make 2026-08-23 22:05:26 -04:00
scripts [FIX] binutils records a usr/lib64 path, and cmake deletes html it did not make 2026-08-23 22:05:26 -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.