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docs/ask/ask-deepresearch-2.md
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docs/ask/ask-deepresearch-2.md
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# Reproducible Docker Build System for a Tarball-Supplied Upstream Project
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## Executive summary
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The right way to containerize a tarball-supplied upstream build is to make the build **closed over the build context**: put the upstream tarball and every third-party source archive in `packages/`, pass only **paths** as build arguments, verify checksums inside the build, extract archives explicitly, and remove every build-time `git clone`, `wget`, or other network fetch from the Dockerfile and the upstream Makefile. For the final output, use a **multi-stage build** and export only artifacts, not the entire toolchain image. Docker’s official docs support exactly this pattern: build arguments to parameterize builds, multi-stage builds to shrink outputs, `.dockerignore` to keep the context tight, and the local exporter to write build artifacts directly to the host filesystem. citeturn9view6turn9view10turn15view0turn10view1turn9view12
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For the supplied ASK archive specifically, direct inspection of the uploaded tarballs shows a C/C++ and kernel-module build for entity["company","NXP","semiconductor company"] Layerscape hardware, a Debian-oriented cross-build setup, hardcoded network fetches for `fmlib`, `fmc`, `libnfnetlink`, and `libnetfilter_conntrack`, and a separate kernel tree requirement through `KDIR`. The ASK tarball also contains a `.git/` directory, so version generation must be normalized if you want reproducible tarball-based results. The supplied kernel archive expands as `linux-lf-6.12.49-2.2.0/`. Those facts drive the concrete implementation below.
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The Alpine conversion is practical, but only if you treat musl seriously. Alpine uses musl, not glibc, and Alpine’s own docs warn that musl does not implement most glibc locale behavior. The musl docs also call out common failure modes: glibc-specific `#ifdef`s, GNU `getopt` expectations, iconv assumptions, small default thread stacks, and different dynamic-loader behavior. For simple glibc-runtime gaps, Alpine recommends `gcompat`; for harder runtime compatibility issues, Alpine explicitly points you to containers or chroots running a glibc distribution instead of pretending musl is a drop-in replacement. citeturn18view0turn18view1turn18view5turn18view7turn18view8
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## What the supplied tarballs imply
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Direct inspection of the supplied ASK tarball shows all of the following.
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The top-level Makefile includes `build/toolchain.mk` and `build/sources.mk`, sets `HOST := aarch64-linux-gnu`, defaults `KDIR` to `$(HOME)/Mono/linux`, and fetches upstream dependencies in the build itself. `fmlib` and `fmc` are cloned at tag `lf-6.12.49-2.2.0`; `libnfnetlink-1.0.2` and `libnetfilter_conntrack-1.1.0` are downloaded as tarballs and then patched. That is reproducibility-hostile because the build is not closed over the supplied source archive.
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The provided ASK source already contains one musl-aware clue: `cmm/src/cmm.c` gates `execinfo.h`, `backtrace()`, and `backtrace_symbols()` behind `__GLIBC__` checks. That means a pure musl build is plausible, but it does **not** prove the whole userspace is glibc-independent.
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The ASK build is not just userspace. It also builds out-of-tree kernel modules (`cdx`, `fci`, `auto_bridge`), and those require a matching kernel source tree. So the build system needs a **second tarball input** for full module builds. If that kernel tarball is absent, the build should degrade cleanly to `BUILD_TARGET=userspace`.
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There are **no Dockerfiles** in the supplied archive, so the Alpine conversion below is not a line-by-line rewrite of existing container files. It is a concrete replacement build design based on the actual source tree that was provided.
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### Assumptions where the upstream is unspecified
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The concrete code below is tailored to the supplied ASK archive. Where the user’s request is broader than the archive, these are the assumptions:
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- The upstream source enters the build as `packages/ASK.tar.gz`.
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- Every third-party upstream source the build needs is also vendored into `packages/`.
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- Kernel module builds require a matching kernel source tarball, exposed as `KERNEL_TAR`.
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- If the project were not ASK but some other tarball-based upstream, the same pattern would still apply: replace in-build network fetches with tarball extraction; keep a closed build context; use a builder stage plus a minimal final stage.
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- If the language/build system were unspecified, a reasonable default is:
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- C/C++/make/cmake/autotools: Alpine builder with `build-base` and the needed `-dev` packages.
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- Go: Alpine builder with Go toolchain, then copy the compiled binary into a minimal runtime stage.
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- Python: Alpine builder with Python and build dependencies, then wheel install into a slim runtime stage.
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- Node: Alpine builder with Node toolchain, then copy built assets or production-only install into runtime.
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- No CPU/arch was specified in the prompt, but the supplied ASK sources are arm64-oriented, so the examples default to `linux/arm64`.
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That base-image strategy follows Docker’s guidance to use trusted minimal bases and multi-stage builds; the specific image family for Go, Python, or Node is a practical recommendation layered on top of that principle. citeturn15view3turn9view10
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## Recommended design
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The design should be blunt and boring.
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Put `ASK.tar.gz`, the kernel tarball, and every dependency tarball under `packages/`. Add a root `.dockerignore` that excludes everything else. Replace the upstream Makefile’s `git clone` and `wget` logic with extraction from paths passed as build args. Verify `SHA256SUMS` in the builder stage. Remove `.git` after extraction or override the version-generation path so the build does not depend on VCS metadata. Set `SOURCE_DATE_EPOCH`, `LC_ALL=C`, and `TZ=UTC` so timestamps and locale-sensitive outputs stop drifting. Pin the base image by digest in CI, because Docker’s docs are explicit that image tags are mutable; if you still permit BuildKit-managed remote source resolution, Docker also documents `EXPERIMENTAL_BUILDKIT_SOURCE_POLICY` for reproducible builds with pinned dependencies. citeturn15view0turn15view3turn10view4turn14search1turn10view5
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For ASK, the best Alpine port is **native Alpine build per target platform** using `docker buildx build --platform=linux/arm64`, not a Debian-style `crossbuild-essential-arm64` clone. Debian has an official cross meta-package for that workflow; Alpine stable does not give you the same one-shot cross package story, so Buildx plus platform selection is the cleaner solution here. Docker’s buildx docs explicitly layer platform selection onto the whole Dockerfile, and Debian’s own package page makes clear what `crossbuild-essential-arm64` actually is: a convenience list of cross-build essentials for Debian, not a universal pattern you must reproduce on Alpine. citeturn23view0turn23view1turn6view4
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```mermaid
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flowchart TD
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A[packages/ASK.tar.gz] --> B[builder stage]
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A2[packages/linux.tar.gz] --> B
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A3[vendored dependency tarballs] --> B
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B --> C[verify SHA256SUMS]
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C --> D[extract ASK tarball]
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D --> E[replace upstream fetch logic with tarball extraction]
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E --> F[build patched third-party deps]
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F --> G[build ASK userspace]
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G --> H{kernel tarball present?}
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H -->|yes| I[build kernel modules]
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H -->|no| J[skip modules and build userspace only]
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I --> K[stage dist artifacts]
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J --> K
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K --> L[scratch artifacts stage]
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L --> M[buildx local exporter writes out/ask]
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```
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## Concrete implementation
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### Root `.dockerignore`
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```dockerignore
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**
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!Makefile
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!docker/**
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!packages/**
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!scripts/**
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```
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### Host vendoring script
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**`scripts/vendor-sources.sh`**
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```sh
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#!/usr/bin/env sh
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set -eu
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PACKAGES_DIR="${1:-packages}"
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ASK_SRC="${ASK_SRC:-/absolute/path/to/ASK.tar.gz}"
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KERNEL_SRC="${KERNEL_SRC:-/absolute/path/to/lf-6.12.49-2.2.0.tar.gz}"
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NXP_TAG="lf-6.12.49-2.2.0"
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mkdir -p "${PACKAGES_DIR}"
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install -m 0644 "${ASK_SRC}" "${PACKAGES_DIR}/ASK.tar.gz"
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install -m 0644 "${KERNEL_SRC}" "${PACKAGES_DIR}/linux.tar.gz"
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curl -L --fail -o "${PACKAGES_DIR}/fmlib-${NXP_TAG}.tar.gz" \
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"https://github.com/nxp-qoriq/fmlib/archive/refs/tags/${NXP_TAG}.tar.gz"
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curl -L --fail -o "${PACKAGES_DIR}/fmc-${NXP_TAG}.tar.gz" \
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"https://github.com/nxp-qoriq/fmc/archive/refs/tags/${NXP_TAG}.tar.gz"
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curl -L --fail -o "${PACKAGES_DIR}/libnfnetlink-1.0.2.tar.bz2" \
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"https://www.netfilter.org/projects/libnfnetlink/files/libnfnetlink-1.0.2.tar.bz2"
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curl -L --fail -o "${PACKAGES_DIR}/libnetfilter_conntrack-1.1.0.tar.xz" \
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"https://www.netfilter.org/projects/libnetfilter_conntrack/files/libnetfilter_conntrack-1.1.0.tar.xz"
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curl -L --fail -o "${PACKAGES_DIR}/libcli-1.10.7.tar.gz" \
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"https://github.com/dparrish/libcli/archive/refs/tags/V1.10.7.tar.gz"
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(
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cd "${PACKAGES_DIR}"
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find . -maxdepth 1 -type f \
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\( -name '*.tar.gz' -o -name '*.tar.xz' -o -name '*.tar.bz2' \) \
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-print0 | sort -z | xargs -0 sha256sum > SHA256SUMS
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)
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```
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### Host-side extraction and normalization snippet
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```sh
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mkdir -p packages _inspect/ASK
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cp /path/to/ASK.tar.gz packages/ASK.tar.gz
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cp /path/to/lf-6.12.49-2.2.0.tar.gz packages/linux.tar.gz
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tar -xf packages/ASK.tar.gz --strip-components=1 -C _inspect/ASK
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export SOURCE_DATE_EPOCH=1704067200
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tar --sort=name \
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--mtime="@${SOURCE_DATE_EPOCH}" \
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--owner=0 --group=0 --numeric-owner \
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-czf packages/ASK.normalized.tar.gz \
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-C _inspect ASK
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```
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### Root Makefile
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**`Makefile`**
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```make
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.RECIPEPREFIX := >
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DOCKER_PLATFORM ?= linux/arm64
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ALPINE_VERSION ?= 3.22
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BUILD_TARGET ?= dist
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OUT_DIR ?= out/ask
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IMAGE ?= ask-build:local
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ASK_TAR ?= packages/ASK.tar.gz
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KERNEL_TAR ?= packages/linux.tar.gz
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FMLIB_TAR ?= packages/fmlib-lf-6.12.49-2.2.0.tar.gz
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FMC_TAR ?= packages/fmc-lf-6.12.49-2.2.0.tar.gz
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LIBNFNETLINK_TAR ?= packages/libnfnetlink-1.0.2.tar.bz2
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LIBNFCT_TAR ?= packages/libnetfilter_conntrack-1.1.0.tar.xz
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LIBCLI_TAR ?= packages/libcli-1.10.7.tar.gz
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SOURCE_DATE_EPOCH ?= 1704067200
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JOBS ?= 0
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USERSPACE_CFLAGS ?=
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USERSPACE_LDFLAGS ?=
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.PHONY: ASK ASK_IMAGE
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ASK:
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> docker buildx build \
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> --platform="$(DOCKER_PLATFORM)" \
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> --file docker/ask.Dockerfile \
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> --build-arg "ALPINE_VERSION=$(ALPINE_VERSION)" \
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> --build-arg "ASK_TAR=$(ASK_TAR)" \
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> --build-arg "KERNEL_TAR=$(KERNEL_TAR)" \
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> --build-arg "FMLIB_TAR=$(FMLIB_TAR)" \
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> --build-arg "FMC_TAR=$(FMC_TAR)" \
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> --build-arg "LIBNFNETLINK_TAR=$(LIBNFNETLINK_TAR)" \
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> --build-arg "LIBNFCT_TAR=$(LIBNFCT_TAR)" \
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> --build-arg "LIBCLI_TAR=$(LIBCLI_TAR)" \
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> --build-arg "BUILD_TARGET=$(BUILD_TARGET)" \
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> --build-arg "SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH)" \
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> --build-arg "JOBS=$(JOBS)" \
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> --build-arg "USERSPACE_CFLAGS=$(USERSPACE_CFLAGS)" \
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> --build-arg "USERSPACE_LDFLAGS=$(USERSPACE_LDFLAGS)" \
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> --target artifacts \
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> --output "type=local,dest=$(OUT_DIR)" \
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> .
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ASK_IMAGE:
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> docker buildx build \
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> --platform="$(DOCKER_PLATFORM)" \
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> --file docker/ask.Dockerfile \
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> --build-arg "ALPINE_VERSION=$(ALPINE_VERSION)" \
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> --build-arg "ASK_TAR=$(ASK_TAR)" \
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> --build-arg "KERNEL_TAR=$(KERNEL_TAR)" \
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> --build-arg "FMLIB_TAR=$(FMLIB_TAR)" \
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> --build-arg "FMC_TAR=$(FMC_TAR)" \
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> --build-arg "LIBNFNETLINK_TAR=$(LIBNFNETLINK_TAR)" \
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> --build-arg "LIBNFCT_TAR=$(LIBNFCT_TAR)" \
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> --build-arg "LIBCLI_TAR=$(LIBCLI_TAR)" \
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> --build-arg "BUILD_TARGET=$(BUILD_TARGET)" \
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> --build-arg "SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH)" \
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> --build-arg "JOBS=$(JOBS)" \
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> --build-arg "USERSPACE_CFLAGS=$(USERSPACE_CFLAGS)" \
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> --build-arg "USERSPACE_LDFLAGS=$(USERSPACE_LDFLAGS)" \
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> --load \
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> --tag "$(IMAGE)" \
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> .
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# Examples:
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# make ASK
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# make ASK BUILD_TARGET=userspace
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# make ASK DOCKER_PLATFORM=linux/amd64 BUILD_TARGET=userspace
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# make ASK USERSPACE_LDFLAGS="-static-libgcc -static-libstdc++"
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# make ASK ASK_TAR=packages/ASK.tar.gz KERNEL_TAR=packages/linux.tar.gz
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```
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The prompt’s example command is syntactically incomplete. The correct `buildx` form needs a Dockerfile specified with `--file`, one `--build-arg KEY=VALUE` flag per argument, and a final positional build context such as `.`. For artifact builds, `--output type=local,dest=...` is the right default; `--load` is only for a single-platform image result. citeturn9view6turn23view0turn10view0turn10view1
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### Upstream override files
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**`docker/overrides/toolchain.mk`**
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```make
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CROSS_COMPILE ?=
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ARCH ?= arm64
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PLATFORM ?= LS1043A
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CC ?= $(if $(CROSS_COMPILE),$(CROSS_COMPILE)gcc,gcc)
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CXX ?= $(if $(CROSS_COMPILE),$(CROSS_COMPILE)g++,g++)
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AR ?= $(if $(CROSS_COMPILE),$(CROSS_COMPILE)ar,ar)
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STRIP ?= $(if $(CROSS_COMPILE),$(CROSS_COMPILE)strip,strip)
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KDIR ?= /opt/kernel
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```
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**`docker/overrides/Makefile`**
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```make
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.RECIPEPREFIX := >
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include build/toolchain.mk
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include build/sources.mk
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DEFCONFIG := $(CURDIR)/config/kernel/defconfig
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DIST := $(CURDIR)/dist
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SRCDIR := $(CURDIR)/sources
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PATCHES := $(CURDIR)/patches
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HOST ?= $(shell $(CC) -dumpmachine 2>/dev/null || echo aarch64-alpine-linux-musl)
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FMLIB_DIR := $(SRCDIR)/fmlib
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FMC_DIR := $(SRCDIR)/fmc/source
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LIBFCI_DIR := $(CURDIR)/fci/lib
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SYSROOT := $(SRCDIR)/sysroot
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ABM_DIR := $(CURDIR)/auto_bridge
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KBUILD_ARGS := CROSS_COMPILE=$(CROSS_COMPILE) ARCH=$(ARCH)
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CDX_ARGS := $(KBUILD_ARGS) KERNELDIR=$(KDIR) PLATFORM=$(PLATFORM)
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FCI_ARGS := $(KBUILD_ARGS) KERNEL_SOURCE=$(KDIR) BOARD_ARCH=$(ARCH) \
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KBUILD_EXTRA_SYMBOLS=$(CURDIR)/cdx/Module.symvers
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ABM_ARGS := $(KBUILD_ARGS) KERNEL_SOURCE=$(KDIR) PLATFORM=$(PLATFORM)
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ASK_TAR ?=
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FMLIB_TAR ?= /vendor/packages/fmlib-$(NXP_TAG).tar.gz
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FMC_TAR ?= /vendor/packages/fmc-$(NXP_TAG).tar.gz
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LIBNFNETLINK_TAR ?= /vendor/packages/libnfnetlink-$(LIBNFNETLINK_VER).tar.bz2
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LIBNFCT_TAR ?= /vendor/packages/libnetfilter_conntrack-$(LIBNFCT_VER).tar.xz
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S := $(SRCDIR)/.stamps
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$(shell mkdir -p $(S))
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JOBS ?= 1
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USERSPACE_CFLAGS ?=
|
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USERSPACE_LDFLAGS ?=
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.PHONY: all setup sources modules userspace kernel dist clean clean-all help \
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cdx fci auto_bridge fmc cmm dpa_app
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all: modules userspace
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setup:
|
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> @echo "Container build: setup target intentionally disabled."
|
||||
|
||||
sources: $(S)/fmlib $(S)/fmc $(S)/libfci $(S)/libnfnetlink $(S)/libnfct
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|
||||
$(S)/fmlib:
|
||||
> @echo "==> fmlib: extract + patch + build"
|
||||
> rm -rf $(FMLIB_DIR)
|
||||
> mkdir -p $(FMLIB_DIR)
|
||||
> tar -xf "$(FMLIB_TAR)" --strip-components=1 -C $(FMLIB_DIR)
|
||||
> cd $(FMLIB_DIR) && patch -p1 -i "$(PATCHES)/fmlib/01-mono-ask-extensions.patch"
|
||||
> $(MAKE) -C $(FMLIB_DIR) CROSS_COMPILE=$(CROSS_COMPILE) KERNEL_SRC=$(KDIR) libfm-arm.a
|
||||
> ln -sf libfm-arm.a $(FMLIB_DIR)/libfm.a
|
||||
> touch $@
|
||||
|
||||
$(S)/fmc: $(S)/fmlib
|
||||
> @echo "==> fmc: extract + patch + build"
|
||||
> rm -rf $(SRCDIR)/fmc
|
||||
> mkdir -p $(SRCDIR)/fmc
|
||||
> tar -xf "$(FMC_TAR)" --strip-components=1 -C $(SRCDIR)/fmc
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||||
> cd $(SRCDIR)/fmc && patch -p1 -i "$(PATCHES)/fmc/01-mono-ask-extensions.patch"
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||||
> $(MAKE) -C $(FMC_DIR) \
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> CC=$(CC) CXX=$(CXX) AR=$(AR) \
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||||
> MACHINE=ls1046 \
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||||
> FMD_USPACE_HEADER_PATH=$(FMLIB_DIR)/include/fmd \
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||||
> FMD_USPACE_LIB_PATH=$(FMLIB_DIR) \
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> LIBXML2_HEADER_PATH=/usr/include/libxml2 \
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> TCLAP_HEADER_PATH=/usr/include
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||||
> touch $@
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||||
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||||
$(S)/libfci:
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||||
> @echo "==> libfci: build"
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||||
> $(MAKE) -C $(LIBFCI_DIR) CC=$(CC) AR=$(AR)
|
||||
> touch $@
|
||||
|
||||
$(S)/libnfnetlink:
|
||||
> @echo "==> libnfnetlink: extract + patch + build"
|
||||
> rm -rf $(SRCDIR)/libnfnetlink-$(LIBNFNETLINK_VER)
|
||||
> mkdir -p $(SRCDIR) $(SYSROOT)
|
||||
> tar -xf "$(LIBNFNETLINK_TAR)" -C $(SRCDIR)
|
||||
> cd $(SRCDIR)/libnfnetlink-$(LIBNFNETLINK_VER) && \
|
||||
> patch -p1 -i "$(PATCHES)/libnfnetlink/01-nxp-ask-nonblocking-heap-buffer.patch" && \
|
||||
> ./configure --host=$(HOST) --prefix=$(SYSROOT) --enable-static --disable-shared && \
|
||||
> $(MAKE) -j$(JOBS) && \
|
||||
> $(MAKE) install
|
||||
> touch $@
|
||||
|
||||
$(S)/libnfct: $(S)/libnfnetlink
|
||||
> @echo "==> libnetfilter_conntrack: extract + patch + build"
|
||||
> rm -rf $(SRCDIR)/libnetfilter_conntrack-$(LIBNFCT_VER)
|
||||
> mkdir -p $(SRCDIR) $(SYSROOT)
|
||||
> tar -xf "$(LIBNFCT_TAR)" -C $(SRCDIR)
|
||||
> cd $(SRCDIR)/libnetfilter_conntrack-$(LIBNFCT_VER) && \
|
||||
> patch -p1 -i "$(PATCHES)/libnetfilter-conntrack/01-nxp-ask-comcerto-fp-extensions.patch" && \
|
||||
> PKG_CONFIG_PATH=$(SYSROOT)/lib/pkgconfig \
|
||||
> ./configure --host=$(HOST) --prefix=$(SYSROOT) --enable-static --disable-shared \
|
||||
> CFLAGS="-I$(SYSROOT)/include" LDFLAGS="-L$(SYSROOT)/lib" && \
|
||||
> $(MAKE) -j$(JOBS) && \
|
||||
> $(MAKE) install
|
||||
> touch $@
|
||||
|
||||
modules: cdx fci auto_bridge
|
||||
|
||||
cdx:
|
||||
> $(MAKE) -C cdx $(CDX_ARGS) modules
|
||||
|
||||
fci: cdx
|
||||
> $(MAKE) -C fci $(FCI_ARGS) modules
|
||||
|
||||
auto_bridge:
|
||||
> $(MAKE) -C auto_bridge $(ABM_ARGS)
|
||||
|
||||
userspace: fmc cmm dpa_app
|
||||
|
||||
fmc: $(S)/fmc
|
||||
> @true
|
||||
|
||||
cmm: $(S)/libfci $(S)/libnfct
|
||||
> $(MAKE) -C cmm CC=$(CC) \
|
||||
> LIBFCI_DIR=$(LIBFCI_DIR) \
|
||||
> ABM_DIR=$(ABM_DIR) \
|
||||
> SYSROOT=$(SYSROOT) \
|
||||
> CFLAGS="$(USERSPACE_CFLAGS) -I/usr/local/include" \
|
||||
> LDFLAGS="$(USERSPACE_LDFLAGS) -L/usr/local/lib"
|
||||
|
||||
dpa_app: $(S)/fmc
|
||||
> $(MAKE) -C dpa_app CC=$(CC) \
|
||||
> CFLAGS="-DDPAA_DEBUG_ENABLE -DNCSW_LINUX $(USERSPACE_CFLAGS) \
|
||||
> -I/usr/local/include \
|
||||
> -I$(FMC_DIR) -I$(CURDIR)/cdx \
|
||||
> -I$(FMLIB_DIR)/include/fmd \
|
||||
> -I$(FMLIB_DIR)/include/fmd/Peripherals \
|
||||
> -I$(FMLIB_DIR)/include/fmd/integrations" \
|
||||
> LDFLAGS="-L/usr/local/lib -lpthread -lcli \
|
||||
> -L$(FMC_DIR) -lfmc \
|
||||
> -L$(FMLIB_DIR) -lfm \
|
||||
> -lstdc++ -lxml2 -lm $(USERSPACE_LDFLAGS)"
|
||||
|
||||
kernel:
|
||||
> cp $(DEFCONFIG) $(KDIR)/.config
|
||||
> $(MAKE) -C $(KDIR) $(KBUILD_ARGS) olddefconfig
|
||||
> $(MAKE) -C $(KDIR) $(KBUILD_ARGS) -j$(JOBS) Image modules
|
||||
|
||||
dist: all
|
||||
> mkdir -p $(DIST)
|
||||
> cp cdx/cdx.ko $(DIST)/
|
||||
> cp fci/fci.ko $(DIST)/
|
||||
> cp auto_bridge/auto_bridge.ko $(DIST)/
|
||||
> cp $(FMC_DIR)/fmc $(DIST)/
|
||||
> cp cmm/src/cmm $(DIST)/
|
||||
> cp dpa_app/dpa_app $(DIST)/
|
||||
> @echo "Artifacts staged in $(DIST)/"
|
||||
|
||||
clean:
|
||||
> -$(MAKE) -C cdx $(CDX_ARGS) clean
|
||||
> -$(MAKE) -C fci $(FCI_ARGS) clean
|
||||
> -$(MAKE) -C auto_bridge $(ABM_ARGS) clean
|
||||
> -$(MAKE) -C $(LIBFCI_DIR) clean
|
||||
> -$(MAKE) -C cmm clean
|
||||
> -$(MAKE) -C dpa_app clean
|
||||
> rm -f $(S)/*
|
||||
> rm -rf $(DIST)
|
||||
|
||||
clean-all: clean
|
||||
> rm -rf $(SRCDIR)
|
||||
|
||||
help:
|
||||
> @echo "make - build everything from vendored tarballs"
|
||||
> @echo "make userspace - build userspace only"
|
||||
> @echo "make modules - build out-of-tree kernel modules"
|
||||
> @echo "make kernel - build kernel Image + in-tree modules"
|
||||
> @echo "make dist - stage artifacts into dist/"
|
||||
> @echo "make clean - clean local build artifacts"
|
||||
> @echo "make clean-all - clean everything including extracted sources"
|
||||
```
|
||||
|
||||
### Alpine multi-stage Dockerfile
|
||||
|
||||
**`docker/ask.Dockerfile`**
|
||||
|
||||
```dockerfile
|
||||
# syntax=docker/dockerfile:1.7
|
||||
#
|
||||
# In CI, prefer pinning the base image by digest, for example:
|
||||
# FROM alpine:3.22@sha256:<digest> AS base-build
|
||||
|
||||
ARG ALPINE_VERSION=3.22
|
||||
|
||||
FROM alpine:${ALPINE_VERSION} AS base-build
|
||||
ARG ALPINE_VERSION
|
||||
|
||||
WORKDIR /work
|
||||
|
||||
RUN set -eux; \
|
||||
printf '%s\n' \
|
||||
"https://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/main" \
|
||||
"https://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/community" \
|
||||
> /etc/apk/repositories; \
|
||||
apk add --no-cache \
|
||||
bash \
|
||||
bc \
|
||||
bison \
|
||||
build-base \
|
||||
bzip2 \
|
||||
coreutils \
|
||||
file \
|
||||
findutils \
|
||||
flex \
|
||||
gawk \
|
||||
libmnl-dev \
|
||||
libpcap-dev \
|
||||
libxml2-dev \
|
||||
linux-headers \
|
||||
openssl-dev \
|
||||
patch \
|
||||
perl \
|
||||
pkgconf \
|
||||
python3 \
|
||||
tar \
|
||||
tclap-dev \
|
||||
xz \
|
||||
zlib-dev
|
||||
|
||||
COPY packages/ /vendor/packages/
|
||||
COPY docker/overrides/ /docker-overrides/
|
||||
|
||||
RUN set -eux; \
|
||||
if [ -f /vendor/packages/SHA256SUMS ]; then \
|
||||
cd /vendor/packages && sha256sum -c SHA256SUMS; \
|
||||
fi
|
||||
|
||||
FROM base-build AS libcli-builder
|
||||
ARG LIBCLI_TAR=packages/libcli-1.10.7.tar.gz
|
||||
|
||||
RUN set -eux; \
|
||||
mkdir -p /tmp/libcli; \
|
||||
tar -xf "/vendor/${LIBCLI_TAR}" --strip-components=1 -C /tmp/libcli; \
|
||||
make -C /tmp/libcli; \
|
||||
make -C /tmp/libcli install; \
|
||||
rm -rf /tmp/libcli
|
||||
|
||||
FROM base-build AS builder
|
||||
ARG ASK_TAR=packages/ASK.tar.gz
|
||||
ARG KERNEL_TAR=packages/linux.tar.gz
|
||||
ARG FMLIB_TAR=packages/fmlib-lf-6.12.49-2.2.0.tar.gz
|
||||
ARG FMC_TAR=packages/fmc-lf-6.12.49-2.2.0.tar.gz
|
||||
ARG LIBNFNETLINK_TAR=packages/libnfnetlink-1.0.2.tar.bz2
|
||||
ARG LIBNFCT_TAR=packages/libnetfilter_conntrack-1.1.0.tar.xz
|
||||
ARG BUILD_TARGET=dist
|
||||
ARG SOURCE_DATE_EPOCH=1704067200
|
||||
ARG JOBS=0
|
||||
ARG USERSPACE_CFLAGS=
|
||||
ARG USERSPACE_LDFLAGS=
|
||||
|
||||
COPY --from=libcli-builder /usr/local/ /usr/local/
|
||||
|
||||
ENV LC_ALL=C
|
||||
ENV TZ=UTC
|
||||
ENV SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH}
|
||||
|
||||
RUN set -eux; \
|
||||
test -f "/vendor/${ASK_TAR}"; \
|
||||
mkdir -p /work/src; \
|
||||
tar -xf "/vendor/${ASK_TAR}" -C /work/src; \
|
||||
test -d /work/src/ASK; \
|
||||
rm -rf /work/src/ASK/.git; \
|
||||
install -m 0644 /docker-overrides/Makefile /work/src/ASK/Makefile; \
|
||||
install -m 0644 /docker-overrides/toolchain.mk /work/src/ASK/build/toolchain.mk; \
|
||||
if [ ! -f /work/src/ASK/cmm/src/version.h ]; then \
|
||||
printf '/* Auto-generated */\n#ifndef VERSION_H\n#define VERSION_H\n#define CMM_VERSION "%s"\n#endif\n' \
|
||||
"tarball" > /work/src/ASK/cmm/src/version.h; \
|
||||
fi
|
||||
|
||||
RUN set -eux; \
|
||||
case "${BUILD_TARGET}" in \
|
||||
all|modules|kernel|dist) \
|
||||
test -f "/vendor/${KERNEL_TAR}" || { echo "KERNEL_TAR is required for BUILD_TARGET=${BUILD_TARGET}"; exit 2; }; \
|
||||
mkdir -p /opt/kernel; \
|
||||
tar -xf "/vendor/${KERNEL_TAR}" --strip-components=1 -C /opt/kernel; \
|
||||
;; \
|
||||
*) : ;; \
|
||||
esac
|
||||
|
||||
RUN set -eux; \
|
||||
if [ "${JOBS}" = "0" ]; then JOBS="$(getconf _NPROCESSORS_ONLN)"; fi; \
|
||||
make -C /work/src/ASK \
|
||||
FMLIB_TAR="/vendor/${FMLIB_TAR}" \
|
||||
FMC_TAR="/vendor/${FMC_TAR}" \
|
||||
LIBNFNETLINK_TAR="/vendor/${LIBNFNETLINK_TAR}" \
|
||||
LIBNFCT_TAR="/vendor/${LIBNFCT_TAR}" \
|
||||
KDIR=/opt/kernel \
|
||||
JOBS="${JOBS}" \
|
||||
USERSPACE_CFLAGS="${USERSPACE_CFLAGS}" \
|
||||
USERSPACE_LDFLAGS="${USERSPACE_LDFLAGS}" \
|
||||
"${BUILD_TARGET}"
|
||||
|
||||
RUN set -eux; \
|
||||
mkdir -p /out; \
|
||||
if [ -d /work/src/ASK/dist ]; then \
|
||||
cp -a /work/src/ASK/dist/. /out/; \
|
||||
else \
|
||||
[ -f /work/src/ASK/cmm/src/cmm ] && cp /work/src/ASK/cmm/src/cmm /out/ || true; \
|
||||
[ -f /work/src/ASK/dpa_app/dpa_app ] && cp /work/src/ASK/dpa_app/dpa_app /out/ || true; \
|
||||
[ -f /work/src/ASK/sources/fmc/source/fmc ] && cp /work/src/ASK/sources/fmc/source/fmc /out/ || true; \
|
||||
[ -f /work/src/ASK/cdx/cdx.ko ] && cp /work/src/ASK/cdx/cdx.ko /out/ || true; \
|
||||
[ -f /work/src/ASK/fci/fci.ko ] && cp /work/src/ASK/fci/fci.ko /out/ || true; \
|
||||
[ -f /work/src/ASK/auto_bridge/auto_bridge.ko ] && cp /work/src/ASK/auto_bridge/auto_bridge.ko /out/ || true; \
|
||||
fi
|
||||
|
||||
FROM scratch AS artifacts
|
||||
COPY --from=builder /out/ /
|
||||
```
|
||||
|
||||
### Example invocations
|
||||
|
||||
```sh
|
||||
# Full ASK build, including modules, exporting files into out/ask/
|
||||
make ASK
|
||||
|
||||
# Userspace-only build when the kernel tarball is unavailable
|
||||
make ASK BUILD_TARGET=userspace
|
||||
|
||||
# Single-platform image load instead of local artifact export
|
||||
make ASK_IMAGE BUILD_TARGET=userspace IMAGE=ask-build:dev
|
||||
|
||||
# Alpine userspace with selective static GCC/C++ runtime linkage
|
||||
make ASK BUILD_TARGET=userspace \
|
||||
USERSPACE_LDFLAGS="-static-libgcc -static-libstdc++"
|
||||
```
|
||||
|
||||
Sources and notes for the implementation above: `.dockerignore` behavior, Dockerfile-specific ignore precedence, build-context minimization, multi-stage builds, `buildx build` arguments, `--output type=local`, `--load`, `--platform`, and `ADD`/`COPY` semantics all come from Docker’s official docs. The recommendation to use `COPY` for ordinary context files and reserve `ADD` for special cases is also straight from Docker’s best-practices page. The Alpine repository split between `main`, `community`, and `testing` is official Alpine guidance, which matters here because `tclap-dev` lives in `community`. The `libcli` helper stage follows the upstream libcli README, which documents `make` and `make install` into `/usr/local/lib`. citeturn15view0turn15view1turn9view10turn10view0turn10view1turn10view3turn23view0turn23view1turn24view2turn24view1turn18view11turn1search1turn21search0
|
||||
|
||||
## Debian-to-Alpine conversion guide
|
||||
|
||||
The important conversion is not just `apt` to `apk`. It is **glibc-centric Debian cross-build assumptions to musl-centric Alpine native-per-target builds**.
|
||||
|
||||
On Debian Trixie, `build-essential` and `crossbuild-essential-arm64` are official convenience packages. `build-essential` pulls in the default GCC, G++, libc development headers, and `make`. `crossbuild-essential-arm64` is Debian’s official one-shot cross-build convenience package for arm64. Alpine’s nearest equivalent for native builds is `build-base`, which explicitly depends on `gcc`, `g++`, `make`, and `libc-dev`; but Alpine does **not** provide an equivalent stable one-package story matching Debian’s arm64 cross meta-package. That is why the report recommends `docker buildx build --platform=...` rather than rebuilding Debian’s cross-toolchain pattern inside Alpine. citeturn4view0turn6view4turn2view0turn23view1
|
||||
|
||||
Alpine repository selection matters. Alpine’s official repositories are `main`, `community`, and `testing`; stable branches normally use `main` and `community`, while `testing` is edge-only and unsupported as a stable dependency source. That is directly relevant here because `tclap-dev` is in Alpine `community`, while the visible `libcli` package in Alpine’s official package index is in edge/testing rather than a normal stable `-dev` package flow. For a reproducible stable build, vendoring `libcli` as a tarball is cleaner than dragging edge/testing into a stable builder image. citeturn18view11turn1search1turn3view3
|
||||
|
||||
### Debian and Alpine package mapping table
|
||||
|
||||
| Capability | Debian Trixie install command | Alpine 3.22 install command | Practical note |
|
||||
|---|---|---|---|
|
||||
| meta build toolchain | `apt-get update && apt-get install -y build-essential` | `apk add --no-cache build-base` | Rough native-build equivalents |
|
||||
| arm64 cross meta-package | `apt-get install -y crossbuild-essential-arm64` | no stable one-package equivalent | Prefer `buildx --platform=linux/arm64` for Alpine |
|
||||
| GCC C compiler | `apt-get install -y gcc` | `apk add --no-cache gcc` | Alpine `build-base` already brings it in |
|
||||
| GCC C++ compiler | `apt-get install -y g++` | `apk add --no-cache g++` | Alpine `build-base` already brings it in |
|
||||
| make | `apt-get install -y make` | `apk add --no-cache make` | Alpine `build-base` already brings it in |
|
||||
| CMake | `apt-get install -y cmake` | `apk add --no-cache cmake` | Same user-facing package name |
|
||||
| pkg-config tooling | `apt-get install -y pkgconf` | `apk add --no-cache pkgconf` | `pkgconf` is the practical package on both sides |
|
||||
| OpenSSL headers/libs | `apt-get install -y libssl-dev` | `apk add --no-cache openssl-dev` | Direct development-package equivalents |
|
||||
| zlib headers/libs | `apt-get install -y zlib1g-dev` | `apk add --no-cache zlib-dev` | Direct development-package equivalents |
|
||||
| C++ runtime | `apt-get install -y libstdc++6` | `apk add --no-cache libstdc++` | Runtime package names differ |
|
||||
| libc development headers | `apt-get install -y libc6-dev` | `apk add --no-cache musl-dev` | Alpine uses musl, not glibc |
|
||||
| TCLAP headers | `apt-get install -y libtclap-dev` | `apk add --no-cache tclap-dev` | Alpine package is in `community` |
|
||||
| libcli development files | `apt-get install -y libcli-dev` | vendor the libcli tarball and build it | Alpine stable does not give a clean `libcli-dev` replacement path |
|
||||
|
||||
Sources and notes for the table: Debian package naming and dependency roles come from the official Debian package pages for `build-essential`, `crossbuild-essential-arm64`, `pkgconf`, `libssl-dev`, `zlib1g-dev`, `libc6-dev`, `libcli-dev`, `g++`, and the Trixie package index entry showing `libtclap-dev`. Alpine naming and repository placement come from the official Alpine package database pages for `build-base`, `gcc`, `g++`, `make`, `cmake`, `pkgconf`, `openssl-dev`, `zlib-dev`, `libstdc++`, `musl-dev`, `tclap-dev`, `libpcap-dev`, `libmnl-dev`, `libxml2-dev`, and the official `libcli` package page in edge/testing. citeturn4view0turn6view4turn4view1turn6view1turn6view2turn6view3turn6view0turn19view2turn5search0turn2view0turn1search17turn1search5turn2view1turn2view2turn2view3turn3view0turn3view1turn3view2turn1search13turn1search1turn6view6turn6view7turn6view8turn3view3
|
||||
|
||||
## Passing tarballs safely and reproducibly
|
||||
|
||||
There are two different problems here, and they should not be confused.
|
||||
|
||||
If the tarball is **not secret**, the correct pattern is to pass a **path selector** as a build arg and copy the tarball into the build context. Docker’s docs explicitly show `--build-arg` as the right mechanism for build-time parameterization, and the Dockerfile reference explicitly documents that local tar archives added with `ADD` are decompressed and extracted automatically. For normal reproducible CI, the cleaner pattern is still `COPY packages/ ...` plus explicit `tar -xf`, because it gives you better validation and less magic. citeturn9view1turn9view6turn24view2turn9view4turn9view5
|
||||
|
||||
If the tarball **is secret or confidential**, do **not** rely on `ARG`. Docker’s docs warn that build args and environment variables are inappropriate for secrets and point you to secret mounts instead. That is the secure answer. citeturn9view0turn9view3turn16view1turn16view2
|
||||
|
||||
### Non-secret build-arg pattern
|
||||
|
||||
```dockerfile
|
||||
ARG ASK_TAR=packages/ASK.tar.gz
|
||||
COPY packages/ /vendor/packages/
|
||||
RUN test -f "/vendor/${ASK_TAR}" && mkdir -p /src && tar -xf "/vendor/${ASK_TAR}" -C /src
|
||||
```
|
||||
|
||||
```make
|
||||
ASK:
|
||||
> docker buildx build \
|
||||
> --file docker/ask.Dockerfile \
|
||||
> --build-arg "ASK_TAR=$(ASK_TAR)" \
|
||||
> .
|
||||
```
|
||||
|
||||
### Short `ADD` pattern for a local tar archive
|
||||
|
||||
```dockerfile
|
||||
ARG ASK_TAR=packages/ASK.tar.gz
|
||||
ADD ${ASK_TAR} /src/
|
||||
```
|
||||
|
||||
### Secret-mount pattern for confidential tarballs
|
||||
|
||||
```dockerfile
|
||||
# syntax=docker/dockerfile:1.7
|
||||
RUN --mount=type=secret,id=ask,target=/run/secrets/ASK.tar.gz \
|
||||
mkdir -p /src && \
|
||||
tar -xf /run/secrets/ASK.tar.gz -C /src
|
||||
```
|
||||
|
||||
```sh
|
||||
docker buildx build \
|
||||
--secret id=ask,src=packages/ASK.tar.gz \
|
||||
--file docker/ask.Dockerfile \
|
||||
.
|
||||
```
|
||||
|
||||
### Reproducibility controls worth enabling
|
||||
|
||||
Treat these as the minimum serious set:
|
||||
|
||||
- Pin the base image by digest in CI.
|
||||
- Verify `SHA256SUMS` for every vendored tarball.
|
||||
- Set `SOURCE_DATE_EPOCH`.
|
||||
- Set `LC_ALL=C` and `TZ=UTC`.
|
||||
- Remove `.git` after extraction or replace VCS-derived version generation.
|
||||
- If any remote BuildKit source resolution remains, consider Docker’s documented source policy feature.
|
||||
|
||||
The reason is simple: Docker tags are mutable, and `SOURCE_DATE_EPOCH` was created precisely so build systems can share a stable timestamp rather than leaking wall-clock time into artifacts. citeturn10view4turn15view3turn14search0turn14search1turn10view5
|
||||
|
||||
## Musl troubleshooting and decision rules
|
||||
|
||||
Most Alpine ports do not fail because of package names. They fail because the code assumes glibc semantics.
|
||||
|
||||
Alpine’s own musl page says Alpine uses musl as its C standard library and that musl does not implement most locale features that glibc implements. The musl FAQ then gets more specific: common breakage comes from glibc-specific assumptions or wrong `#ifdef`s, GNU `getopt` behavior, iconv BOM and UCS2 assumptions, `off_t` width assumptions, and expectations that `pthread_create` gives you big glibc-sized stacks by default. That is not theory. Those are the actual usual failure modes. citeturn18view0turn18view1turn18view5turn18view6
|
||||
|
||||
For this ASK source tree, one obvious example is already handled: `cmm.c` only includes `execinfo.h` and uses `backtrace()` on glibc. That is the right pattern. If other source files still assume glibc-only headers or symbols, patch them the same way: guard them with `#if defined(__GLIBC__)`, provide a musl-safe fallback, or compile out the diagnostic-only path.
|
||||
|
||||
Threading and loader behavior are the next big traps. The musl docs say the default thread stack is much smaller than glibc’s and can be increased explicitly with `pthread_attr_setstacksize`, or, since newer musl, via `-Wl,-z,stack-size=N`. The musl functional-differences page also says `dlclose()` semantics differ materially: under musl, constructors run only once and destructors run on exit, not on each unload/reload cycle as many glibc-focused programs implicitly assume. If the upstream relies on library unloading or reinitialization as a runtime feature, that is not an Alpine packaging bug; it is a portability bug in the application. citeturn18view3turn18view2
|
||||
|
||||
Some glibc gaps are small enough for compatibility shims. Alpine’s official software-management page says that for simpler binaries you can install `gcompat`, which provides glibc-compatible APIs on musl systems. On aarch64, Alpine’s package contents show that `gcompat` provides the glibc-style loader name and a `libc.so.6` compatibility path. That makes `gcompat` a legitimate option when the problem is a narrow runtime ABI expectation rather than deep glibc dependence. citeturn18view7turn18view8turn13search6
|
||||
|
||||
When `gcompat` is not enough, stop wasting time. Alpine’s own docs explicitly recommend containers or chroots for running glibc programs. If the upstream depends on glibc-only locale behavior, NSS/plugins, loader behavior, or opaque vendor binaries built for glibc, the pragmatic answer is a **glibc builder or runtime stage** for that component, even if the rest of your pipeline uses Alpine. citeturn18view8
|
||||
|
||||
Alpine-specific shell and utility differences also matter. Alpine is built around musl and BusyBox, and Alpine’s docs warn that BusyBox tools tend to implement only standard options and often lack GNU-specific extensions. If the upstream scripts assume GNU `sed`, GNU `find`, `bash`, or other non-POSIX behavior, install the needed packages explicitly or patch the scripts. The Dockerfile above does exactly that by installing `bash`, `coreutils`, `findutils`, `gawk`, and related tools. citeturn18view10
|
||||
|
||||
One more gotcha: musl does not implement `utmp`; Alpine’s docs say those functions are stubbed. If the upstream or its tests use `wall`, `who`, `w`, or similar libc-backed session accounting behavior, expect that to differ on Alpine. citeturn18view9
|
||||
|
||||
### Practical fix list
|
||||
|
||||
Use these fixes in this order:
|
||||
|
||||
- **Wrong `#ifdef`s or missing glibc headers**
|
||||
Patch to feature checks or `__GLIBC__` guards. ASK already does this for `execinfo.h`/`backtrace()` in `cmm.c`.
|
||||
|
||||
- **Tiny musl thread stacks**
|
||||
Patch the app to call `pthread_attr_setstacksize`, or pass a linker stack-size hint with `-Wl,-z,stack-size=N` when appropriate. citeturn18view3
|
||||
|
||||
- **Userspace portability while keeping dynamic linking**
|
||||
Prefer normal musl dynamic linking first.
|
||||
|
||||
- **GCC runtime portability only**
|
||||
Try `-static-libgcc -static-libstdc++` first. This is often enough when the program is otherwise musl-clean but you want to reduce deployment friction around the GCC runtimes.
|
||||
|
||||
- **Simple glibc ABI gaps at runtime**
|
||||
Try `apk add gcompat`. citeturn18view7turn18view8turn13search6
|
||||
|
||||
- **Deep glibc dependencies**
|
||||
Use a glibc runtime image or Alpine-documented container/chroot strategy. citeturn18view8
|
||||
|
||||
- **Full static linking**
|
||||
Use only if every dependency is available static and you have checked licensing and target runtime needs. Do not default to `-static` blindly.
|
||||
|
||||
```mermaid
|
||||
flowchart TD
|
||||
A[Need Alpine runtime?] -->|No| B[Use Alpine builder only and export artifacts]
|
||||
A -->|Yes| C{Does the binary run correctly on musl?}
|
||||
C -->|Yes| D[Use Alpine runtime stage]
|
||||
C -->|Minor glibc ABI loader gap| E[Try gcompat]
|
||||
C -->|glibc-specific behavior or binary blob| F[Use glibc runtime image or chroot/container]
|
||||
```
|
||||
|
||||
## Open questions and limitations
|
||||
|
||||
The supplied archive did not contain any original Dockerfiles, so the Alpine design above is a concrete replacement architecture, not a textual translation of preexisting container files.
|
||||
|
||||
The full module build depends on a matching kernel source tarball. The uploaded kernel archive makes that possible here, but in a generic tarball-only scenario you must state that dependency explicitly rather than silently assuming a host kernel tree exists.
|
||||
|
||||
The final deployment environment for ASK userspace binaries was not specified. That matters. If the target root filesystem is glibc-based and you want drop-in userspace binaries, musl-built artifacts may not be the right end state even if the build itself succeeds.
|
||||
|
||||
The implementation above is intentionally strict: no in-build `git clone`, no `wget`, no unpinned hidden source fetches, no dependence on host package managers inside the source tree, and no ambiguity about whether the tarball or the network is the source of truth. That is the reproducible answer.
|
||||
Reference in New Issue
Block a user