Build the service in a container, and fix what the target compiler found
The openlgtv NDK is a Linux toolchain with no macOS or Windows build, so
tools/build.sh could not produce a binary anywhere else. docker-build.sh
bakes the SDK into an image and compiles there; packaging and deploy stay
on the host, where the TV is reachable. The SDK ships aarch64 as well as
x86_64, so the image picks the one matching the daemon and Apple Silicon
builds natively rather than under emulation.
Cross-compiling for real turned up three things the host compiler did
not:
sink_hyperhdr_viz.c read p->width and p->height to format the error
message after free(p)
sink_hyperhdr.c an SDP connection line of 128 bytes cannot hold
"IN IP4 " plus a 127-byte host plus "/255", so a
long hostname would silently lose its TTL suffix
common/log.c the log body was sized to the whole ring line,
leaving nothing for the prefix; budget for it so
the bound is provable rather than left to
snprintf
A clean cross-compile is now warning-free, and readelf confirms the
design rule holds: luna-service2, glib, PmLogLib and libc, with no
libpulse or libasound.
Also: @webosose/ares-cli was pinned to ^3.0.0, which does not exist
(latest is 2.4.0), so npm install failed outright. build.sh now puts
node_modules/.bin on PATH so a local install is enough.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Rene Kievits
co-authored by
Claude Opus 5
Claude Opus 5
parent
7529a60650
commit
3e4d0e17bc
Executable
+109
@@ -0,0 +1,109 @@
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#!/usr/bin/env bash
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# Cross-compiles the service inside a container, for hosts that cannot run the
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# NDK directly. The openlgtv buildroot SDK is a Linux toolchain, so on macOS or
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# Windows this is the only way to build the native part.
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#
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# ./tools/docker-build.sh # build the service into build/native/
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# ./tools/docker-build.sh shell # a prompt inside the SDK, for poking about
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# ./tools/docker-build.sh clean # drop the image
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#
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# The SDK is baked into an image, so it is downloaded once (~350 MB) and every
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# build after the first starts instantly. There are aarch64 and x86_64 builds
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# of the SDK and the image picks the one matching the container, so this runs
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# natively on Apple Silicon rather than under emulation.
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#
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# NDK_RELEASE pins the SDK release; DOCKER is podman if you prefer.
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set -euo pipefail
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ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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cd "$ROOT"
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DOCKER="${DOCKER:-docker}"
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NDK_RELEASE="${NDK_RELEASE:-webos-a38c582}"
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IMAGE="${IMAGE:-lgtv-audiocap-sdk:$NDK_RELEASE}"
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SDK=/opt/webos-sdk
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TOOLCHAIN="$SDK/share/buildroot/toolchainfile.cmake"
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BUILD_DIR=build/native
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say() { printf '%s\n' "$*"; }
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step() { printf '\n== %s\n' "$*"; }
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die() { printf 'error: %s\n' "$*" >&2; exit 1; }
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command -v "$DOCKER" >/dev/null 2>&1 || die "$DOCKER is not installed"
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build_image() {
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if "$DOCKER" image inspect "$IMAGE" >/dev/null 2>&1; then
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return
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fi
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step "Building the SDK image (once, ~350 MB download)"
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# The arch is resolved inside the build so the image is right for whatever
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# the daemon runs, without the caller having to know.
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"$DOCKER" build --tag "$IMAGE" - <<EOF
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FROM debian:bookworm-slim
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RUN apt-get update \\
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&& apt-get install -y --no-install-recommends \\
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ca-certificates curl cmake make file python3 \\
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&& rm -rf /var/lib/apt/lists/*
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RUN case "\$(uname -m)" in \\
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aarch64|arm64) arch=aarch64 ;; \\
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x86_64|amd64) arch=x86_64 ;; \\
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*) echo "no webOS SDK for \$(uname -m)" >&2; exit 1 ;; \\
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esac \\
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&& mkdir -p $SDK \\
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&& curl -fL "https://github.com/openlgtv/buildroot-nc4/releases/download/$NDK_RELEASE/arm-webos-linux-gnueabi_sdk-buildroot-\$arch.tar.gz" \\
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| tar xz -C $SDK --strip-components=1 \\
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&& $SDK/relocate-sdk.sh
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EOF
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}
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# --user keeps build/ owned by the caller instead of root. HOME has to point
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# somewhere writable or cmake complains about its package registry.
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run() {
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"$DOCKER" run --rm \
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--volume "$ROOT:/src" \
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--workdir /src \
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--user "$(id -u):$(id -g)" \
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--env HOME=/tmp \
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"$@"
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}
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compile() {
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build_image
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# A cache from a differently placed toolchain cannot be reused.
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if [ -f "$BUILD_DIR/CMakeCache.txt" ] \
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&& ! grep -q "CMAKE_TOOLCHAIN_FILE:.*=$TOOLCHAIN" "$BUILD_DIR/CMakeCache.txt"; then
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say "discarding a cmake cache from a different toolchain"
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rm -rf "$BUILD_DIR"
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fi
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step "Cross-compiling the service"
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run --interactive=false "$IMAGE" sh -c "
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set -e
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cmake -S native -B $BUILD_DIR \
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-DCMAKE_TOOLCHAIN_FILE=$TOOLCHAIN \
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-DCMAKE_BUILD_TYPE=Release
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cmake --build $BUILD_DIR --parallel
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file $BUILD_DIR/audiocap-service
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"
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[ -f "$BUILD_DIR/audiocap-service" ] || die "the build produced no binary"
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say ""
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say "built $BUILD_DIR/audiocap-service"
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say "now: ./tools/build.sh package"
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}
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case "${1:-build}" in
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build) compile ;;
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shell)
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build_image
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step "A shell in the SDK image; the toolchain is at $SDK"
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run --interactive --tty "$IMAGE" bash
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;;
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clean)
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"$DOCKER" image rm "$IMAGE" 2>/dev/null && say "removed $IMAGE" || say "no image to remove"
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;;
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-h|--help)
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awk 'NR == 1 { next } /^#/ { sub(/^# ?/, ""); print; next } { exit }' "$0" ;;
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*) die "unknown command '$1' (try --help)" ;;
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esac
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