满庭芳·源流归一

结论：LinuxCNC rs274ngc 源码移植边界继续收拢。已将 rs274ngc 头文件纳入 manifest 跟踪，core 编译组仍只包含可编译源文件；启用 CNC_SIM_ENABLE_LINUXCNC_RS274_BACKEND 时 API 默认使用 LinuxCNC rs274 后端；M428/M429/M430 与 5axis/TRT/TDR/RTCP 相关路径继续保持来自 LinuxCNC 源码或 remap 配置的薄桥接。

验证：./test-linuxcnc-source-syntax.sh；./test-linuxcnc-api-native.sh；./test-native.sh；./test-linuxcnc-source-link.sh。

list-linuxcnc-source-common-cxxflags.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
+include_python=0
+include_core_include=0
+include_core_src=0
+syntax_only=0
+emit_ulapi=1
+
+while [[ "$#" -gt 0 ]]; do
+    case "$1" in
+        --python)
+            include_python=1
+            shift
+            ;;
+        --core-include)
+            include_core_include=1
+            shift
+            ;;
+        --core-src)
+            include_core_src=1
+            shift
+            ;;
+        --syntax-only)
+            syntax_only=1
+            shift
+            ;;
+        --no-ulapi)
+            emit_ulapi=0
+            shift
+            ;;
+        --)
+            shift
+            break
+            ;;
+        *)
+            echo "unknown source cxxflag option: $1" >&2
+            exit 1
+            ;;
+    esac
+done
+
+LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh --root-only
+
+python_includes=()
+if [[ "$include_python" -eq 1 ]]; then
+    python_include_output=$(python3.13-config --includes 2>/dev/null || python3-config --includes)
+    read -r -a python_includes <<<"$python_include_output"
+fi
+
+printf '%s\n' \
+    -std=c++17 \
+    $([[ "$emit_ulapi" -eq 1 ]] && printf '%s\n' -DULAPI) \
+    $([[ "$syntax_only" -eq 1 ]] && printf '%s\n' -fsyntax-only) \
+    "${python_includes[@]}" \
+    $([[ "$include_core_include" -eq 1 ]] && printf '%s\n' -I core/include) \
+    $([[ "$include_core_src" -eq 1 ]] && printf '%s\n' -I core/src) \
+    -I "$linuxcnc_root/src" \
+    -I "$linuxcnc_root/src/emc" \
+    -I "$linuxcnc_root/src/emc/nml_intf" \
+    -I "$linuxcnc_root/src/emc/rs274ngc" \
+    -I "$linuxcnc_root/src/emc/motion" \
+    -I "$linuxcnc_root/src/emc/pythonplugin" \
+    -I "$linuxcnc_root/include"