zephyr: add linker section for version.cc

This change adds the linker section .unstable_id to the Zephyr build
and avoids an "orphaned" section warning.

Signed-off-by: Yuval Peress <[email protected]>
Change-Id: I439cb5b67d2e9fea99ab1939d4c78e438caa15b1

Author: yperess

platform/zephyr/CMakeLists.txt

@@ -55,6 +55,7 @@ if(CONFIG_CHRE)
       "${CHRE_DIR}/platform/shared/system_time.cc"
       "${CHRE_DIR}/util/dynamic_vector_base.cc"
   )
+  zephyr_linker_sources(SECTIONS linker_chre.ld)
 
   # Optional audio support
   if(CONFIG_CHRE_AUDIO_SUPPORT_ENABLED)

platform/zephyr/linker_chre.ld

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+SECTION_DATA_PROLOGUE(_CHRE_SECTION,,)
+{
+	KEEP(*(".unstable_id"));
+} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
+