Christian Werner
231fdba93d
Log the current working directory in `build-in-docker.sh` to improve the debugging process during kernel module compilation. This update helps track the build context path passed to the Docker container.
50 lines
2.1 KiB
Bash
Executable File
50 lines
2.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Build the IEC listener kernel module in an emulated arm64 container, so it can
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# be compiled on a non-Pi (x86) host. The resulting iec_listener.ko is written
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# back into this kernel/ directory on the host.
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#
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# Usage:
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# ./build-in-docker.sh # build the module
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# ./build-in-docker.sh clean # clean build artifacts
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#
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# Configurable via environment variables:
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# HEADERS_PKG headers package (default: linux-headers-rpi-v8, 64-bit Zero 2 W)
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# e.g. linux-headers-rpi-v7 / -v6 for 32-bit, raspberrypi-kernel-headers
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# KERNEL_VERSION exact version to pin, e.g. 1:6.6.51-1+rpt3 (default: latest in repo)
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# IMAGE builder image tag (default: iec-kbuild)
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#
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# NOTE: the raspberrypi apt archive generally serves only the *latest* kernel in
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# its pool, so pinning KERNEL_VERSION to an old release may fail to download. The
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# reliable match strategy is to keep the Pi current (`sudo apt full-upgrade`) and
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# build with the default (latest). See docs/kernel-notes.md.
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set -euo pipefail
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cd "$(dirname "$0")"
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IMAGE="${IMAGE:-iec-kbuild}"
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HEADERS_PKG="${HEADERS_PKG:-linux-headers-rpi-v8}"
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KERNEL_VERSION="${KERNEL_VERSION:-}"
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# 1. Make sure the host can run arm64 binaries under qemu (one-time, privileged).
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if [ ! -e /proc/sys/fs/binfmt_misc/qemu-aarch64 ]; then
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echo "==> registering qemu arm64 binfmt (one-time, needs a privileged container)"
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docker run --privileged --rm tonistiigi/binfmt --install arm64
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fi
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# 2. Build the builder image (installs toolchain + matching kernel headers).
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echo "==> building image '$IMAGE' (HEADERS_PKG=$HEADERS_PKG KERNEL_VERSION=${KERNEL_VERSION:-latest})"
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docker build --platform linux/arm64 \
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--build-arg HEADERS_PKG="$HEADERS_PKG" \
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--build-arg KERNEL_VERSION="$KERNEL_VERSION" \
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-t "$IMAGE" .
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# 3. Compile; mount this dir so the .ko lands on the host, owned by the caller.
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echo "==> compiling module"
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echo "working directory: $PWD"
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docker run --rm --platform linux/arm64 \
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-u "$(id -u):$(id -g)" -e HOME=/tmp \
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-v "$PWD:/build" "$IMAGE" "$@"
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echo "==> done"
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ls -l iec_listener.ko 2>/dev/null || echo "(no iec_listener.ko produced — see output above)"
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