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ci(pi-gen): apt qemu-user-static instead of tonistiigi (chroot needs static binary)

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tonistiigi/binfmt registers /usr/bin/qemu-aarch64 (dynamic). Even with F-flag
preload, qemu still dlopen's its libs at exec time — fails inside pi-gen's
chroot. Debian's qemu-user-static ships /usr/bin/qemu-aarch64-static and
post-install sets F flag automatically. Pi-gen's dependencies_check needs
the static path.
This commit is contained in:
Mitchell R 2026-05-20 01:32:05 +02:00
parent 39fac39bf2
commit 5e1f8f80bc
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1 changed files with 14 additions and 7 deletions
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21
.github/workflows/build.yml vendored
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@ -175,17 +175,24 @@ jobs:
# docker/setup-qemu-action wraps, called directly here so we control
# the flags + can sanity-check after.
- name: Register QEMU binfmt for arm64
# tonistiigi/binfmt --install arm64 sets the F (fix-binary) flag,
# so the kernel preloads qemu-aarch64-static into kernel memory at
# registration time. The qemu emulation then works inside pi-gen's
# nested container without needing /usr/bin/qemu-aarch64-static to
# be present in the chroot.
# Host-install qemu-user-static (Debian/Ubuntu package). It auto-
# registers binfmt_misc entries pointing at
# /usr/bin/qemu-aarch64-static. The Debian post-install also sets
# the F (fix-binary) flag so the kernel preloads the static binary
# bytes — meaning the chroot inside pi-gen doesn't need a copy.
# tonistiigi/binfmt only ships /usr/bin/qemu-aarch64 (dynamic),
# which fails inside a chroot at exec time when ld.so + libs are
# missing. Pi-gen specifically wants the -static path.
run: |
docker run --rm --privileged tonistiigi/binfmt --install arm64
sudo apt-get update
sudo apt-get install -y --no-install-recommends \
qemu-user-static binfmt-support
sudo update-binfmts --enable qemu-aarch64
echo "--- binfmt_misc registrations ---"
ls -la /proc/sys/fs/binfmt_misc/ || true
echo "--- qemu-aarch64 detail (look for 'flags: F') ---"
echo "--- qemu-aarch64 detail (interpreter should be -static) ---"
cat /proc/sys/fs/binfmt_misc/qemu-aarch64 || true
file /usr/bin/qemu-aarch64-static || true
- name: Build Pi image (pi-gen)
uses: usimd/pi-gen-action@v1