libinit_host: clean up dependencies

libinit_host doesn't need HIDL stuff. host_init_verifier does HIDL
interface checks.

Bug: 326827772
Test: mmma system/core
Change-Id: I59c1444649a62202abb54a2e0cceee38522c1259

init/Android.bp

@@ -84,11 +84,6 @@ init_device_sources = [
     "ueventd.cpp",
     "ueventd_parser.cpp",
 ]
-init_host_sources = [
-    "check_builtins.cpp",
-    "host_import_parser.cpp",
-    "interface_utils.cpp",
-]
 
 soong_config_module_type {
     name: "libinit_cc_defaults",
@@ -606,8 +601,6 @@ cc_defaults {
     whole_static_libs: ["libcap"],
     shared_libs: [
         "libcutils",
-        "libhidl-gen-utils",
-        "libhidlmetadata",
         "liblog",
         "libprocessgroup",
         "libprotobuf-cpp-lite",
@@ -615,9 +608,6 @@ cc_defaults {
     proto: {
         type: "lite",
     },
-    generated_headers: [
-        "generated_stub_builtin_function_map",
-    ],
     target: {
         android: {
             enabled: false,
@@ -636,17 +626,43 @@ cc_defaults {
 cc_binary {
     name: "host_init_verifier",
     defaults: ["init_host_defaults"],
-    srcs: ["host_init_verifier.cpp"] + init_common_sources + init_host_sources,
+    srcs: [
+        "check_builtins.cpp",
+        "host_import_parser.cpp",
+        "host_init_verifier.cpp",
+        "interface_utils.cpp",
+    ] + init_common_sources,
     generated_headers: [
         "generated_android_ids",
+        "generated_stub_builtin_function_map",
     ],
+    shared_libs: [
+        "libhidl-gen-utils",
+        "libhidlmetadata",
+    ],
+}
+
+genrule {
+    name: "noop_builtin_function_map",
+    tool_files: ["host_builtin_map.py"],
+    out: ["noop_builtin_function_map.h"],
+    srcs: [
+        "builtins.cpp",
+        "noop_builtins.cpp",
+    ],
+    cmd: "$(location host_builtin_map.py) --builtins $(location builtins.cpp) --check_builtins $(location noop_builtins.cpp) > $(out)",
 }
 
 cc_library_host_static {
     name: "libinit_host",
     defaults: ["init_host_defaults"],
-    srcs: init_common_sources + init_host_sources,
+    srcs: [
+        "noop_builtins.cpp",
+    ] + init_common_sources,
     export_include_dirs: ["."],
+    generated_headers: [
+        "noop_builtin_function_map",
+    ],
     proto: {
         export_proto_headers: true,
     },

init/noop_builtins.cpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Note that parser will perform arity checks only.
+
+#include <android-base/result.h>
+
+#include "builtin_arguments.h"
+#include "builtins.h"
+
+namespace android::init {
+
+static base::Result<void> check_stub(const BuiltinArguments&) {
+    return {};
+}
+
+#include "noop_builtin_function_map.h"
+
+}  // namespace android::init