No description
Mathieu Benoit
dd202a3a54
Stage 2 could rebuild one named package. It could not rebuild a hundred and thirty-three, for reasons that were all about the driver. The order is not re-derived: it is the closure stage 1 arrived at over four rounds of resolver output and then confirmed by 179 builds, so it moves to packages.sh and both stages read it. make_rootfs wipes the chroot every run, which is what makes it reproducible and what made stage 2 unresumable -- stage2.state outlived the packages it named. Its output is now put back. The stall guard is shared rather than copied: stage 2 needs it more, since a test suite is the likeliest thing in a build to wait forever. Build trees are removed after a package installs, never after it fails. --- FR --- L'étage 2 savait rebâtir un paquet nommé. Il ne savait pas en rebâtir cent trente-trois, pour des raisons qui tenaient toutes au pilote. L'ordre n'est pas réinventé : c'est la fermeture obtenue à l'étage 1 en quatre tours de sortie du résolveur, puis confirmée par 179 constructions. Il passe donc dans packages.sh, que les deux étages lisent. make_rootfs efface le chroot à chaque passage — ce qui le rend reproductible et rendait l'étage 2 irreprenable, stage2.state survivant aux paquets qu'il nommait. Sa production y est désormais réinstallée. La garde d'immobilité est partagée plutôt que recopiée : l'étage 2 en a plus besoin, une suite de tests étant ce qui attend le plus volontiers pour toujours. Les arbres de compilation sont effacés après installation, jamais après un échec. Assisted-by: Claude Opus 5 |
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| .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.