按推荐建议，继续执行

结论：新增 interp_read.cc、interp_check.cc、interp_execute.cc 的 vendored LinuxCNC 源码直接编译探针，并纳入 native 验证，继续约束迁移工作来源于 LinuxCNC 源程序。

wasm-port/docs/porting-steps-standalone.md

@@ -445,6 +445,11 @@ Current verified progress:
   `interp_convert.cc`. The required `emcStatus` shim is limited to the native
   status boundary used by `tag_arc()` for machine units; it is not a
   project-authored CNC behavior implementation.
+- `tools/build_native_probes.sh` now also includes direct source compile
+  probes for vendored `interp_read.cc`, `interp_check.cc`, and
+  `interp_execute.cc`. These probes keep the next interpreter-core migration
+  work focused on LinuxCNC source entry points and expose missing standalone
+  runtime shims before wrapper behavior is expanded.
 
 ## Phase 4: Port INI Parsing Without Editing Upstream