按推荐建议，继续执行

结论：为 vendored LinuxCNC 的 inifile.cc 增加直接源码编译探针，使 source-manifest 中所有 .c/.cc 文件都有 standalone native 源码级编译检查。

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

@@ -479,6 +479,10 @@ Current verified progress:
   compiled as C with `gcc` so its LinuxCNC C linkage is preserved. The
   standalone `rtapi.h` shim was made C/C++ compatible for this C-source
   boundary without changing vendored LinuxCNC files.
+- `inifile.cc` now has its own direct source compile probe in addition to the
+  existing INI parser harness. With this probe, every `.c` and `.cc` file
+  listed in `tools/source-manifest.txt` has a native source-level compile
+  check under the standalone build boundary.
 
 ## Phase 4: Port INI Parsing Without Editing Upstream