按推荐建议，继续执行

结论：补齐 interp_base.cc 与 gomath.c 的 vendored LinuxCNC 直接源码编译探针，增加 C 编译边界，并让 rtapi shim 支持 C/C++，继续确保核心功能来源于 LinuxCNC 源程序。

wasm-port/tools/build_native_probes.sh

@@ -10,6 +10,7 @@ INCLUDE_DIR="$ROOT_DIR/runtime/core/include"
 MINIMAL_GCODE_FIXTURE="$ROOT_DIR/tests/fixtures/gcode/minimal_linear.ngc"
 NAMEDPARAM_INI_FIXTURE="$ROOT_DIR/tests/fixtures/ini/namedparams.ini"
 CXX="${CXX:-g++}"
+CC="${CC:-gcc}"
 
 mkdir -p "$BUILD_DIR"
 
@@ -45,6 +46,11 @@ MINIMAL_FLAGS=(
   -DLINUXCNC_STANDALONE_USE_RS274_PRE_STATE
 )
 
+INTERP_BASE_FLAGS=(
+  "${MINIMAL_FLAGS[@]}"
+  -DEMC2_HOME=\"/standalone\"
+)
+
 MINIMAL_LINK_FLAGS=(
   -Wl,--gc-sections
 )
@@ -54,6 +60,24 @@ TP_FLAGS=(
   -fpermissive
 )
 
+C_FLAGS=(
+  -std=gnu11
+  -O2
+  -D_GNU_SOURCE
+  -DM_PI=3.14159265358979323846
+  -I"$WRAP_DIR"
+  -I"$SHIM_DIR"
+  -I"$INCLUDE_DIR"
+  -I"$VENDOR_DIR/src"
+  -I"$VENDOR_DIR/src/rtapi"
+  -I"$VENDOR_DIR/src/emc"
+  -I"$VENDOR_DIR/src/emc/nml_intf"
+  -I"$VENDOR_DIR/src/emc/motion"
+  -I"$VENDOR_DIR/src/emc/tp"
+  -I"$VENDOR_DIR/src/emc/kinematics"
+  -I"$VENDOR_DIR/src/libnml/posemath"
+)
+
 write_command_file() {
   local file="$1"
   shift
@@ -129,6 +153,32 @@ compile_object() {
   return 1
 }
 
+compile_c_object() {
+  local target="$1"
+  local source="$2"
+  local obj="$3"
+  shift 3
+
+  local stdout_log="$BUILD_DIR/$target.stdout.log"
+  local stderr_log="$BUILD_DIR/$target.stderr.log"
+  local depfile="$obj.d"
+  local cmdfile="$obj.cmd"
+  local cmd=("$CC" "$@" -MMD -MP -MF "$depfile" -c "$source" -o "$obj")
+
+  mkdir -p "$(dirname "$obj")"
+  if ! object_needs_rebuild "$obj" "$depfile" "$cmdfile" "${cmd[@]}"; then
+    printf 'up to date: %s\n' "$source" >> "$stdout_log"
+    return 0
+  fi
+
+  printf 'compile-c: %s\n' "$source" >> "$stdout_log"
+  if "${cmd[@]}" >> "$stdout_log" 2>> "$stderr_log"; then
+    write_command_file "$cmdfile" "${cmd[@]}"
+    return 0
+  fi
+  return 1
+}
+
 link_needs_rebuild() {
   local output="$1"
   local cmdfile="$2"
@@ -247,6 +297,27 @@ build_object_target() {
   return "$status"
 }
 
+build_c_object_target() {
+  local target="$1"
+  local output="$2"
+  local source="$3"
+  local flags_name="$4"
+
+  local stdout_log="$BUILD_DIR/$target.stdout.log"
+  local stderr_log="$BUILD_DIR/$target.stderr.log"
+  : > "$stdout_log"
+  : > "$stderr_log"
+
+  local -n flags="$flags_name"
+  local status=0
+  if ! compile_c_object "$target" "$source" "$output" "${flags[@]}"; then
+    status=1
+  fi
+
+  echo "$status" > "$BUILD_DIR/$target.exitcode"
+  return "$status"
+}
+
 NO_LINK_FLAGS=()
 
 INI_PROBE_SOURCES=(
@@ -629,4 +700,16 @@ build_object_target \
   "$VENDOR_DIR/src/emc/rs274ngc/rs274ngc_pre.cc" \
   MINIMAL_FLAGS
 
+build_object_target \
+  linuxcnc_interp_base_source_probe \
+  "$BUILD_DIR/linuxcnc_interp_base_source_probe.o" \
+  "$VENDOR_DIR/src/emc/rs274ngc/interp_base.cc" \
+  INTERP_BASE_FLAGS
+
+build_c_object_target \
+  linuxcnc_gomath_source_probe \
+  "$BUILD_DIR/linuxcnc_gomath_source_probe.o" \
+  "$VENDOR_DIR/src/libnml/posemath/gomath.c" \
+  C_FLAGS
+
 echo "native probes complete"