每轮只推进合理适量的上下文、禁止顺手扩功能 smoke：源码链接构建约束

test-linuxcnc-wasm-interp-find-link.sh

@@ -5,10 +5,35 @@ cd "$(dirname "$0")"
 
 linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
 cxx=${CXX:-g++}
-build_dir=$(mktemp -d "${TMPDIR:-/tmp}/cnc_sim_linuxcnc_wasm_interp_find_link.XXXXXX")
+if [[ -z ${CXX:-} ]] && command -v ccache >/dev/null 2>&1; then
+    cxx="ccache $cxx"
+fi
+build_jobs=${CNC_SIM_BUILD_JOBS:-8}
+if ! [[ "$build_jobs" =~ ^[1-9][0-9]*$ ]]; then
+    echo "CNC_SIM_BUILD_JOBS must be a positive integer: $build_jobs" >&2
+    exit 1
+fi
+build_dir=${CNC_SIM_WASM_INTERP_FIND_BUILD_DIR-build/wasm-interp-find-link}
+if [[ -z "$build_dir" ]]; then
+    echo "CNC_SIM_WASM_INTERP_FIND_BUILD_DIR must not be empty" >&2
+    exit 1
+fi
+if [[ "$build_dir" =~ [[:space:]] ]]; then
+    echo "CNC_SIM_WASM_INTERP_FIND_BUILD_DIR must not contain whitespace: $build_dir" >&2
+    exit 1
+fi
+mkdir -p "$build_dir"
+build_dir=$(cd "$build_dir" && pwd)
+if [[ "$build_dir" == "/" ]]; then
+    echo "CNC_SIM_WASM_INTERP_FIND_BUILD_DIR must not be the filesystem root" >&2
+    exit 1
+fi
+exec 9>"$build_dir/interp-find.lock"
+flock 9
 
-trap 'rm -rf "$build_dir"' EXIT
-LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh --root-only
+preflight_cache_dir=${CNC_SIM_PREFLIGHT_CACHE_DIR:-"$build_dir/preflight-cache"}
+LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs-cached.sh --cache-dir "$preflight_cache_dir" --root-only
+linuxcnc_root=$(cd "$linuxcnc_root" && pwd)
 
 tooldata_mmap_backend_shim=$(./list-linuxcnc-wasm-safe-shims.sh tooldata_mmap_backend.cc)
 tooldata_runtime_stubs_shim=$(./list-linuxcnc-wasm-safe-shims.sh tooldata_runtime_stubs.cc)
@@ -23,38 +48,71 @@ interp_find_source=${linuxcnc_sources[1]}
 common_flag_output=$(LINUXCNC_ROOT="$linuxcnc_root" ./list-linuxcnc-wasm-common-cxxflags.sh --function-sections --data-sections)
 mapfile -t common_flags <<<"$common_flag_output"
 
-"$cxx" "${common_flags[@]}" \
-    -c "$tooldata_common_source" \
-    -o "$build_dir/tooldata_common.o"
-"$cxx" "${common_flags[@]}" \
-    -c "$tooldata_mmap_backend_shim" \
-    -o "$build_dir/tooldata_mmap_backend.o"
-"$cxx" "${common_flags[@]}" \
-    -c "$tooldata_runtime_stubs_shim" \
-    -o "$build_dir/tooldata_runtime_stubs.o"
-"$cxx" "${common_flags[@]}" \
-    -c "$rtapi_compat_shim" \
-    -o "$build_dir/rtapi_compat.o"
-"$cxx" "${common_flags[@]}" \
-    -c core/wasm_shims/interp_find_probe_stubs.cc \
-    -o "$build_dir/interp_find_probe_stubs.o"
-"$cxx" "${common_flags[@]}" \
-    -c "$interp_find_source" \
-    -o "$build_dir/interp_find.o"
-"$cxx" "${common_flags[@]}" \
-    -c core/wasm_shims/interp_find_probe_main.cc \
-    -o "$build_dir/interp_find_probe_main.o"
+sources=(
+    "$tooldata_common_source"
+    "$tooldata_mmap_backend_shim"
+    "$tooldata_runtime_stubs_shim"
+    "$rtapi_compat_shim"
+    core/wasm_shims/interp_find_probe_stubs.cc
+    "$interp_find_source"
+    core/wasm_shims/interp_find_probe_main.cc
+)
+objects=(
+    "$build_dir/tooldata_common.o"
+    "$build_dir/tooldata_mmap_backend.o"
+    "$build_dir/tooldata_runtime_stubs.o"
+    "$build_dir/rtapi_compat.o"
+    "$build_dir/interp_find_probe_stubs.o"
+    "$build_dir/interp_find.o"
+    "$build_dir/interp_find_probe_main.o"
+)
 
-"$cxx" \
-    "$build_dir/tooldata_common.o" \
-    "$build_dir/tooldata_mmap_backend.o" \
-    "$build_dir/tooldata_runtime_stubs.o" \
-    "$build_dir/rtapi_compat.o" \
-    "$build_dir/interp_find_probe_stubs.o" \
-    "$build_dir/interp_find.o" \
-    "$build_dir/interp_find_probe_main.o" \
-    -Wl,--gc-sections \
-    -o "$build_dir/interp_find_probe"
+signature="$build_dir/interp-find.signature"
+next_signature="$build_dir/interp-find.signature.next"
+{
+    printf 'CXX=%s\n' "$cxx"
+    printf 'PWD=%s\n' "$PWD"
+    printf 'LINUXCNC_ROOT=%s\n' "$linuxcnc_root"
+    printf 'BUILD_RULE_VERSION=1\n'
+    printf 'COMMON_FLAGS='
+    printf ' %s' "${common_flags[@]}"
+    printf '\n'
+    printf 'SOURCES:\n'
+    printf '%s\n' "${sources[@]}"
+} > "$next_signature"
+if [[ ! -f "$signature" ]] || ! cmp -s "$signature" "$next_signature"; then
+    rm -f "$build_dir"/*.o "$build_dir"/*.d "$build_dir/interp_find_probe"
+fi
+mv "$next_signature" "$signature"
+
+makefile="$build_dir/interp-find.mk"
+{
+    printf 'CXX := %s\n' "$cxx"
+    printf 'COMMON_FLAGS :='
+    printf ' %s' "${common_flags[@]}"
+    printf '\n\n'
+    printf 'OBJECTS :='
+    printf ' %s' "${objects[@]}"
+    printf '\n\n'
+    printf 'DEP_FILES :=\n'
+    for object in "${objects[@]}"; do
+        printf 'DEP_FILES += %s.d\n' "$object"
+    done
+    printf '\n.PHONY: all\n'
+    printf 'all: %s/interp_find_probe\n\n' "$build_dir"
+
+    object_index=0
+    for source in "${sources[@]}"; do
+        printf '%s: %s\n' "${objects[$object_index]}" "$source"
+        printf '\t@$(CXX) $(COMMON_FLAGS) -MMD -MP -MF %s.d -c %s -o %s\n\n' "${objects[$object_index]}" "$source" "${objects[$object_index]}"
+        object_index=$((object_index + 1))
+    done
+
+    printf '%s/interp_find_probe: $(OBJECTS)\n' "$build_dir"
+    printf '\t@$(CXX) $(OBJECTS) -Wl,--gc-sections -o %s/interp_find_probe\n\n' "$build_dir"
+    printf '\n-include $(DEP_FILES)\n'
+} > "$makefile"
+make --output-sync=target -j"$build_jobs" -f "$makefile" >/dev/null
 
 "$build_dir/interp_find_probe"