按 align-linuxcnc 约束补 runtime shim 源码依据

core/wasm_shims/linuxcnc_runtime_shim.cc

@@ -7,8 +7,12 @@
 #include <string>
 #include <wordexp.h>
 
+// LinuxCNC source basis: src/emc/rs274ngc/gcodemodule.cc defines _task=0 for
+// preview, while src/emc/task/emctaskmain.cc defines _task=1 for milltask.
 int _task = 0;
 
+// LinuxCNC source basis: src/emc/task/taskclass.cc and
+// src/emc/rs274ngc/gcodemodule.cc register builtin interpreter/emccanon modules.
 extern "C" PyObject *PyInit_interpreter(void) {
     return nullptr;
 }
@@ -29,6 +33,9 @@ struct _inittab builtin_modules[] = {
 };
 }
 
+// LinuxCNC source basis: src/emc/rs274ngc/interp_namedparams.cc fetch_hal_param()
+// uses these HAL entry points; include/hal.h declares them and src/hal/hal_lib.c
+// provides the native backend.
 extern "C" int hal_init(const char *) {
     return 1;
 }
@@ -159,6 +166,8 @@ std::string expand_path_word(const char *words) {
 
 } // namespace
 
+// LinuxCNC source basis: src/emc/rs274ngc/rs274ngc_pre.cc uses wordexp() and
+// wordfree() while resolving program/subroutine paths.
 extern "C" int wordexp(const char *words, wordexp_t *pwordexp, int) {
     if (!words || !pwordexp) {
         return WRDE_BADVAL;