No description
Mathieu Benoit
f87502622a
Three more upstream PKGBUILDs assume x86_64, each in a different way, and each is dropped rather than repaired because the thing being dropped is architecture-specific by nature. gcc: Ada and D are written in themselves and need an existing compiler of the same language. Ubuntu ships gnat, but not one GCC 15 accepts, and there is no D bootstrap compiler here at all. Modula-2 and COBOL have the same shape. Front ends reduced to c, c++, fortran, lto, objc and obj-c++, which is everything this port and ERPLibre compile. binutils: gold is x86-centric, deprecated upstream since 2.44, and built by no distribution that ships s390x. ld.bfd is the linker on Z. binutils builds once gold is disabled -- measured. libtool: the lib32-libltdl split package is i686-on-x86_64 multilib. Its build step is already guarded by CARCH, but prepare() copies the tree to src/libtool32 unconditionally and the package function then packages a tree nobody built. Two host-layout bridges were also needed. Ubuntu multiarch puts asm/, bits/, gnu/ and sys/sdt.h under /usr/include/s390x-linux-gnu, while glibc builds with -nostdinc and expects the classic layout: fatal error: asm/errno.h: No such file or directory fatal error: sys/sdt.h: No such file or directory Symlinks make the host look like Arch for those paths. sys/ needed the files linked, not the directory, since /usr/include/sys already exists. --- FR --- Trois PKGBUILD amont de plus supposent x86_64, chacun a sa maniere, et chacun est retire plutot que repare : ce qu on retire est par nature propre a une architecture. gcc : Ada et D sont ecrits en eux-memes et reclament un compilateur existant du meme langage. Ubuntu livre gnat, mais pas une version que GCC 15 accepte, et il n y a ici aucun compilateur D d amorcage. Modula-2 et COBOL posent le meme probleme. Les frontaux se reduisent a c, c++, fortran, lto, objc et obj-c++, ce qui couvre tout ce que ce portage et ERPLibre compilent. binutils : gold est centre sur x86, abandonne en amont depuis 2.44, et construit par aucune distribution livrant s390x. Sur Z, l editeur de liens est ld.bfd. binutils se construit des que gold est desactive -- mesure. libtool : le paquet scinde lib32-libltdl est du multilib i686 sur x86_64. Son etape de compilation est deja gardee par CARCH, mais prepare() copie l arbre vers src/libtool32 sans condition, et la fonction de paquet empaquette ensuite un arbre que personne n a bati. Deux ponts de disposition d hote etaient aussi necessaires. Le multiarch d Ubuntu place asm/, bits/, gnu/ et sys/sdt.h sous /usr/include/s390x-linux-gnu, quand glibc compile avec -nostdinc et attend la disposition classique : fatal error: asm/errno.h: No such file or directory fatal error: sys/sdt.h: No such file or directory Des liens symboliques donnent a l hote l allure d Arch pour ces chemins. Pour sys/ il faut lier les fichiers et non le repertoire, puisque /usr/include/sys existe deja. Assisted-by: Claude Opus 5 |
||
|---|---|---|
| .github/workflows | ||
| arch-kernel | ||
| boot | ||
| patches | ||
| scripts | ||
| .env.example | ||
| .gitignore | ||
| CODEOWNERS | ||
| Containerfile | ||
| LICENSE | ||
| Makefile | ||
| README.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.