cx-git-agent
81 lines
2.4 KiB
Bash
Executable File
81 lines
2.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# cxos/vendor/linux/build.sh — build the pinned Linux kernel for CxOS.
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#
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# Prerequisites:
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# * `cxos/vendor/linux/fetch.sh` already ran (source extracted)
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# * Host has gcc, make, bc, bison, flex, libssl-dev, libelf-dev
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#
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# Usage:
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# build.sh # x86_64
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# build.sh --arch aarch64
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# build.sh --dry # print plan, don't compile
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#
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# Outputs (relative to repo root):
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# dist/cxos/vmlinuz (x86_64 bzImage / aarch64 Image)
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# dist/cxos/System.map
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set -euo pipefail
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ARCH="x86_64"
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DRY=0
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for ((i=1; i<=$#; i++)); do
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case "${!i}" in
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--arch) ((i++)); ARCH="${!i}" ;;
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--dry) DRY=1 ;;
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-h|--help)
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sed -n '2,15p' "$0" | sed 's/^# \{0,1\}//'
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exit 0 ;;
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*) echo "build.sh: unknown arg: ${!i}" >&2; exit 2 ;;
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esac
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done
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HERE="$(cd "$(dirname "$0")" && pwd)"
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REPO_ROOT="$(cd "$HERE/../../.." && pwd)"
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PINNED="$HERE/PINNED.json"
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FRAGMENT="$HERE/cxos.config.fragment"
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VERSION="$(python3 -c 'import json,sys;print(json.load(open(sys.argv[1]))["version"])' "$PINNED")"
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EXTRACTED_DIR="$(python3 -c 'import json,sys;print(json.load(open(sys.argv[1]))["extracted_dir"])' "$PINNED")"
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SRC="$HERE/src/$EXTRACTED_DIR"
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case "$ARCH" in
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x86_64) KARCH="x86_64"; IMAGE_REL="arch/x86/boot/bzImage" ;;
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aarch64) KARCH="arm64"; IMAGE_REL="arch/arm64/boot/Image" ;;
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*) echo "build.sh: unsupported arch: $ARCH" >&2; exit 2 ;;
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esac
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OUT_DIR="$REPO_ROOT/dist/cxos"
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JOBS="${JOBS:-$(nproc 2>/dev/null || echo 2)}"
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echo "==> linux ${VERSION} (${KARCH}) -> ${OUT_DIR}/vmlinuz"
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echo " src : ${SRC}"
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echo " fragment: ${FRAGMENT}"
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echo " jobs : ${JOBS}"
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if [[ "$DRY" == "1" ]]; then
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echo "==> dry-run; not compiling"
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exit 0
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fi
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if [[ ! -d "$SRC" ]]; then
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echo "build.sh: source not extracted; run fetch.sh first" >&2
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exit 1
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fi
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mkdir -p "$OUT_DIR"
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# Honor SOURCE_DATE_EPOCH for reproducibility.
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KBUILD_BUILD_TIMESTAMP="$(date -u -d "@${SOURCE_DATE_EPOCH:-1700000000}" '+%Y-%m-%d %H:%M:%S UTC')"
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export KBUILD_BUILD_TIMESTAMP
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export KBUILD_BUILD_USER="cxos"
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export KBUILD_BUILD_HOST="cxos-build"
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cd "$SRC"
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make ARCH="$KARCH" defconfig
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"$SRC/scripts/kconfig/merge_config.sh" -O . .config "$FRAGMENT"
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make ARCH="$KARCH" olddefconfig
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make ARCH="$KARCH" -j"$JOBS"
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cp -f "$IMAGE_REL" "$OUT_DIR/vmlinuz"
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cp -f "System.map" "$OUT_DIR/System.map"
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echo "==> wrote ${OUT_DIR}/vmlinuz ($(stat -c%s "$OUT_DIR/vmlinuz") bytes)"
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