Mathieu Benoit
f81d2dc315
Arch Linux runs on s390x. Installing the repository into a rootfs and entering it: bash : 5.3.15(1)-release uname -m : s390x glibc : ldd (GNU libc) 2.44 Two things the test taught that sixty-eight successful builds had not. bash would not start at all: "chroot: No such file or directory" on a binary that was plainly there. That is the dynamic linker being absent -- bash asks for /lib/ld64.so.1, and that path exists only through the usr-merge symlinks the filesystem package installs. Without it an Arch rootfs starts nothing. coreutils then failed on libselinux.so.1. Not a port defect: a genuine dependency that was never built. pacman had in fact listed all of them before I passed --nodeps -- brotli, libxml2, pam, systemd, pacman-mirrorlist, libmakepkg-dropins. The resolver works; the repository was incomplete. They are added to stage 1 by name, with the reason recorded. A build that succeeds proves the compiler accepted the source. Only running the binary proves the package. --- FR --- Arch Linux tourne sur s390x. Le depot installe dans un rootfs, puis on y entre : bash : 5.3.15(1)-release uname -m : s390x glibc : ldd (GNU libc) 2.44 Deux enseignements que soixante-huit compilations reussies n avaient pas donnes. bash ne demarrait pas du tout : « chroot: No such file or directory » sur un binaire pourtant present. C est l interpreteur dynamique qui manque -- bash reclame /lib/ld64.so.1, chemin qui n existe que par les liens usr-merge du paquet filesystem. Sans lui, un rootfs Arch ne lance rien. coreutils echouait ensuite sur libselinux.so.1. Non pas un defaut du portage : une dependance reelle jamais batie. pacman les avait d ailleurs toutes nommees avant que je passe --nodeps -- brotli, libxml2, pam, systemd, pacman-mirrorlist, libmakepkg-dropins. Le resolveur fonctionne ; c est le depot qui etait incomplet. Elles rejoignent l etage 1, avec la raison consignee. Une compilation reussie prouve que le compilateur a accepte la source. Seul le binaire qui s execute prouve le paquet. Assisted-by: Claude Opus 5
88 lines
3.6 KiB
Bash
Executable file
88 lines
3.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Stage 1 of the port: build a self-hosting Arch `core` for s390x.
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#
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# THE THREE-STAGE DISCIPLINE, AND WHY IT IS NOT OPTIONAL
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#
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# Stage 1 builds with the HOST toolchain (Ubuntu gcc/glibc). Every package it
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# produces is therefore linked against the host's glibc, not Arch's. That is
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# acceptable -- and unavoidable, since Arch's glibc needs an Arch gcc which
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# needs an Arch glibc -- but it is not a port yet.
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#
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# Stage 2 chroots into the stage-1 result and rebuilds everything with the
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# stage-1 toolchain. Stage 3 repeats it, and a port is self-hosting once
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# stage 3 reproduces stage 2. Skipping this leaves host artefacts baked into
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# packages that will fail months later, far from their cause.
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#
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# This script is stage 1 only.
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set -uo pipefail
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HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$HERE/bootstrap-pacman.sh"
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WORK="${WORK:-$HOME/work/arch-s390x}"
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REPO="${REPO:-$WORK/repo/s390x}"
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STATE="$WORK/stage1.state"
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# Build order. It follows link-time dependencies, not pacman metadata:
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# --nodeps means pacman never checks, so anything a compiler actually needs
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# must already exist. Within a group the order is free.
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STAGE1_PACKAGES=(
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# Foundation: headers, then the C library, then the compiler chain.
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linux-api-headers glibc binutils gcc
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# Compression and crypto, needed by libarchive and curl further down.
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zlib bzip2 xz zstd lz4 openssl
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# Terminal handling: bash links against readline, readline against ncurses.
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ncurses readline
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# The shell, and the coreutils prerequisites Arch declares.
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attr acl gmp mpfr libcap bash coreutils
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# Text and file tools the build systems themselves call.
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sed grep gawk findutils diffutils file which patch
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# Archivers, then the library pacman reads packages with.
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tar gzip expat libarchive
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# Build systems.
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m4 autoconf automake libtool make pkgconf
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# pacman's network and signature stack.
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libnghttp2 libpsl curl libgpg-error libassuan gnupg gpgme
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# System skeleton: without these a rootfs has no /etc/passwd, no zones,
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# no /etc/services -- and nothing boots to a usable shell.
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filesystem iana-etc tzdata licenses shadow util-linux
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# Named by the chroot test, not guessed. Installing the repo into a
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# rootfs and entering it turned "does it work?" into a precise list:
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# - coreutils links against libselinux, and would not start without it
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# - libcap needs pam; openssl needs brotli; libarchive needs libxml2
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# - pacman itself asks for systemd, pacman-mirrorlist and
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# libmakepkg-dropins
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# Sixty-eight successful builds proved none of this. One chroot did.
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libselinux pam brotli libxml2 systemd pacman-mirrorlist libmakepkg-dropins
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# And finally the package manager itself, built as an Arch package.
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pacman
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)
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built() { grep -qxF "$1" "$STATE" 2>/dev/null; }
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mark() { echo "$1" >> "$STATE"; }
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main() {
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mkdir -p "$WORK/pkg" "$REPO"
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touch "$STATE"
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local ok=0 fail=0 failed=()
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for p in "${STAGE1_PACKAGES[@]}"; do
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if built "$p"; then
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echo "== $p already built, skipping =="
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continue
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fi
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# A failure must not stop the run: one missing package should not hide
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# the state of the forty that follow. They are collected and reported.
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if build_package "$p" > "$WORK/log-$p.txt" 2>&1; then
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mark "$p"; ok=$((ok + 1))
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echo "OK $p"
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else
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fail=$((fail + 1)); failed+=("$p")
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echo "FAIL $p (see $WORK/log-$p.txt)"
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fi
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done
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echo
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echo "== stage 1: $ok built, $fail failed =="
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[ "$fail" -eq 0 ] || printf ' failed: %s\n' "${failed[*]}"
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}
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main "$@"
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