No description
Mathieu Benoit
9936d8f873
The PGO fix broke the build it was meant to repair: /build/binutils/PKGBUILD: line 107: --enable-plugins: command not found The line it commented out ended in a backslash. A comment inside a backslash-continued command does not comment out an option -- it breaks the continuation, and the next option becomes a command of its own. This port had already documented the mirror image, where commenting the FIRST line of a multi-line assignment leaves the continuations live; same fact, other side. The line is deleted now, and nothing is put in its place: any comment inside the ./configure invocation would break it again. The explanation belongs in the hook. Also removed from that hook: a check ending in `|| true`, which passes always. A guard that cannot fail is worse than no guard, because it reads like verification. --- FR --- Le correctif PGO a cassé la construction qu'il devait réparer : /build/binutils/PKGBUILD: line 107: --enable-plugins: command not found La ligne commentée finissait par une contre-oblique. Un commentaire dans une commande continuée ne supprime pas une option — il brise la continuation, et l'option suivante devient une commande. Ce portage avait déjà documenté l'image inverse, où commenter la PREMIÈRE ligne d'une affectation multiligne laisse les continuations actives ; même fait, autre face. La ligne est désormais supprimée, et rien ne la remplace : tout commentaire dans l'appel à ./configure le briserait de nouveau. L'explication appartient au hook. Retiré aussi de ce hook : un contrôle finissant par `|| true`, donc toujours satisfait. Une garde incapable d'échouer est pire qu'aucune garde, car elle se lit comme une vérification. Assisted-by: Claude Opus 5 |
||
|---|---|---|
| .github/workflows | ||
| arch-kernel | ||
| boot | ||
| patches | ||
| scripts | ||
| .env.example | ||
| .gitignore | ||
| CODEOWNERS | ||
| Containerfile | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
| TODO.md | ||
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.