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-rs274-native.sh

@@ -5,10 +5,33 @@ cd "$(dirname "$0")"
 
 linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
 cxx=${CXX:-g++}
-build_dir=$(mktemp -d "${TMPDIR:-/tmp}/cnc_sim_native.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_RS274_NATIVE_BUILD_DIR-build/rs274-native-test}
+if [[ -z "$build_dir" ]]; then
+    echo "CNC_SIM_RS274_NATIVE_BUILD_DIR must not be empty" >&2
+    exit 1
+fi
+if [[ "$build_dir" =~ [[:space:]] ]]; then
+    echo "CNC_SIM_RS274_NATIVE_BUILD_DIR must not contain whitespace: $build_dir" >&2
+    exit 1
+fi
 
-trap 'rm -rf "$build_dir"' EXIT
-LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh --root-only
+mkdir -p "$build_dir"
+build_dir=$(cd "$build_dir" && pwd)
+if [[ "$build_dir" == "/" ]]; then
+    echo "CNC_SIM_RS274_NATIVE_BUILD_DIR must not be the filesystem root" >&2
+    exit 1
+fi
+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 "$linuxcnc_root" && pwd)
 # The LinuxCNC rs274 backend path can bus-error when two dumps run concurrently.
 exec 9>"${TMPDIR:-/tmp}/cnc_sim_linuxcnc_rs274_native.lock"
 flock 9
@@ -36,13 +59,68 @@ mapfile -t common_flags <<<"$common_flag_output"
 link_flag_output=$(LINUXCNC_ROOT="$linuxcnc_root" ./list-linuxcnc-native-linkflags.sh)
 mapfile -t link_flags <<<"$link_flag_output"
 
-"$cxx" "${common_flags[@]}" \
-    "${project_sources[@]}" \
-    "${link_flags[@]}" \
-    -lrs274 \
-    -ltooldata \
-    -lpython3.13 \
-    -o "$build_dir/linuxcnc_rs274_dump"
+project_objects=()
+project_index=0
+for source in "${project_sources[@]}"; do
+    project_objects+=("$build_dir/project_${project_index}.o")
+    project_index=$((project_index + 1))
+done
+
+rs274_native_signature="$build_dir/rs274-native.signature"
+rs274_native_next_signature="$build_dir/rs274-native.signature.next"
+{
+    printf 'CXX=%s\n' "$cxx"
+    printf 'PWD=%s\n' "$PWD"
+    printf 'LINUXCNC_ROOT=%s\n' "$linuxcnc_root"
+    printf 'BUILD_RULE_VERSION=1\n'
+    printf 'COMMON_FLAGS='
+    printf ' %s' "${common_flags[@]}"
+    printf '\n'
+    printf 'LINK_FLAGS='
+    printf ' %s' "${link_flags[@]}"
+    printf '\n'
+    printf 'PROJECT_SOURCES:\n'
+    printf '%s\n' "${project_sources[@]}"
+} > "$rs274_native_next_signature"
+if [[ ! -f "$rs274_native_signature" ]] || ! cmp -s "$rs274_native_signature" "$rs274_native_next_signature"; then
+    rm -f "$build_dir"/project_*.o \
+        "$build_dir"/project_*.o.d \
+        "$build_dir/linuxcnc_rs274_dump"
+fi
+mv "$rs274_native_next_signature" "$rs274_native_signature"
+
+rs274_native_makefile="$build_dir/rs274-native.mk"
+{
+    printf 'CXX := %s\n' "$cxx"
+    printf 'COMMON_FLAGS :='
+    printf ' %s' "${common_flags[@]}"
+    printf '\n'
+    printf 'LINK_FLAGS :='
+    printf ' %s' "${link_flags[@]}"
+    printf '\n\n'
+    printf 'PROJECT_OBJECTS :='
+    printf ' %s' "${project_objects[@]}"
+    printf '\n\n'
+    printf 'DEP_FILES :=\n'
+    for object in "${project_objects[@]}"; do
+        printf 'DEP_FILES += %s.d\n' "$object"
+    done
+    printf '\n.PHONY: all\n'
+    printf 'all: %s\n\n' "$build_dir/linuxcnc_rs274_dump"
+
+    project_index=0
+    for source in "${project_sources[@]}"; do
+        printf '%s: %s\n' "${project_objects[$project_index]}" "$source"
+        printf '\t@$(CXX) $(COMMON_FLAGS) -MMD -MP -MF %s.d -c %s -o %s\n\n' \
+            "${project_objects[$project_index]}" "$source" "${project_objects[$project_index]}"
+        project_index=$((project_index + 1))
+    done
+
+    printf '%s: $(PROJECT_OBJECTS)\n' "$build_dir/linuxcnc_rs274_dump"
+    printf '\t@$(CXX) $(PROJECT_OBJECTS) $(LINK_FLAGS) -lrs274 -ltooldata -lpython3.13 -o %s\n' "$build_dir/linuxcnc_rs274_dump"
+    printf '\n-include $(DEP_FILES)\n'
+} > "$rs274_native_makefile"
+make --output-sync=target -j"$build_jobs" -f "$rs274_native_makefile"
 
 CNC_SIM_RS274_VAR="$var_file" "$build_dir/linuxcnc_rs274_dump" tests/gcode/linuxcnc_basic_motion.ngc >"$output_dir/cnc_sim_linuxcnc_basic_motion.json"
 CNC_SIM_RS274_VAR="$var_file" "$build_dir/linuxcnc_rs274_dump" tests/gcode/basic_mill.ngc >"$output_dir/cnc_sim_linuxcnc_basic_mill.json"