pw_chre: Write our own version.cc

Write a pigweed version.cc instead of using the one
from the shared platform files, as the shared platform
adds a section to the DLL in a way incompatible with mac
compilers.

Bug: b/300633363

Change-Id: I95e2510f1bc36b137a5ec453ef75f9253050b87e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/170790
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: David Gilhooley <dgilhooley@google.com>

third_party/chre/BUILD.bazel

@@ -20,5 +20,6 @@ filegroup(
     name = "chre",
     srcs = [
         "integration_test.cc",
+        "version.cc",
     ],
 )

third_party/chre/BUILD.gn

@@ -104,7 +104,6 @@ if (dir_pw_third_party_chre == "") {
       "$dir_pw_third_party_chre/platform/shared/nanoapp/nanoapp_dso_util.cc",
       "$dir_pw_third_party_chre/platform/shared/pal_system_api.cc",
       "$dir_pw_third_party_chre/platform/shared/system_time.cc",
-      "$dir_pw_third_party_chre/platform/shared/version.cc",
       "$dir_pw_third_party_chre/util/buffer_base.cc",
       "$dir_pw_third_party_chre/util/dynamic_vector_base.cc",
       "$dir_pw_third_party_chre/util/nanoapp/audio.cc",
@@ -114,6 +113,13 @@ if (dir_pw_third_party_chre == "") {
       "$dir_pw_third_party_chre/util/system/debug_dump.cc",
     ]
 
+    # TODO(b/300633363): Use CHRE's version when it compiles on MacOS.
+    if (current_os == "mac") {
+      sources += [ "version.cc" ]
+    } else {
+      sources += [ "$dir_pw_third_party_chre/platform/shared/version.cc" ]
+    }
+
     public_deps = [
       ":chre_headers",
       "$pw_chre_PLATFORM_BACKEND",

third_party/chre/version.cc

@@ -0,0 +1,26 @@
+// Copyright 2023 The Pigweed Authors
+//
+// 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
+//
+//     https://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.
+
+#include "chre/platform/version.h"
+
+#ifndef CHRE_VERSION_STRING
+#define CHRE_VERSION_STRING "undefined"
+#endif  // CHRE_VERSION_STRING
+
+namespace chre {
+
+// TODO(b/300633363): Use CHRE's version when it compiles on MacOS.
+const char* getChreVersionString() { return CHRE_VERSION_STRING; }
+
+}  // namespace chre