Add cc13x2_26x2 build to unified build (project-chip#4572)

* Add cc13x2_26x2 build to unified build

There are some missing files in build_overrides to build TI in the
unified build, as well as some missing dependencies diagnosed by
gn --check --fail-on-unused-args.

Fix those issues so that cc13x2_26x2 can be built together with the
other examples. Also despam the sysconfig generator so we don't
drown out important diagnostics.

Tested via

  ./gn_build.sh enable_cc13x2_26x2_builds=true ti_simplelink_sdk_root=\"$HOME/ti/simplelink_cc13x2_26x2_sdk_4_40_00_44\" ti_sysconfig_root=\"$HOME/ti/sysconfig_1.7.0\"

* Use braces in substitution

Co-authored-by: Justin Wood <woody@apple.com>

Author: mspang

build_overrides/freertos.gni

@@ -0,0 +1,18 @@
+# Copyright (c) 2020 Project CHIP 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
+#
+# 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.
+
+declare_args() {
+  # Root directory for FreeRTOS
+  freertos_root = "//third_party/freertos"
+}

build_overrides/ti_simplelink_sdk.gni

@@ -0,0 +1,18 @@
+# Copyright (c) 2020 Project CHIP 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
+#
+# 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.
+
+declare_args() {
+  # Root directory for TI SimpleLink SDK build helpers.
+  ti_simplelink_sdk_build_root = "//third_party/ti_simplelink_sdk"
+}

config/cc13x2_26x2/toolchain/BUILD.gn

@@ -0,0 +1,25 @@
+# Copyright (c) 2020 Project CHIP 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
+#
+# 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.
+
+import("//build_overrides/build.gni")
+import("//build_overrides/chip.gni")
+
+import("${build_root}/toolchain/arm_gcc/arm_toolchain.gni")
+
+arm_toolchain("cc13x2_26x2_lock_app") {
+  toolchain_args = {
+    current_os = "freertos"
+    import("${chip_root}/examples/lock-app/cc13x2_26x2/args.gni")
+  }
+}

src/platform/cc13x2_26x2/args.gni

@@ -21,8 +21,6 @@ arm_platform_config =
 
 chip_device_platform = "cc13x2_26x2"
 
-freertos_target = "${chip_root}/third_party/ti_simplelink_sdk:freertos"
-
 mbedtls_target = "${chip_root}/third_party/ti_simplelink_sdk:mbedtls"
 openthread_external_mbedtls = mbedtls_target
 openthread_external_platform =

third_party/ti_simplelink_sdk/ti_simplelink_sdk.gni

@@ -16,8 +16,11 @@ import("//build_overrides/build.gni")
 import("//build_overrides/chip.gni")
 import("//build_overrides/freertos.gni")
 import("//build_overrides/mbedtls.gni")
+import("//build_overrides/openthread.gni")
+import("//build_overrides/pigweed.gni")
 import("//build_overrides/ti_simplelink_sdk.gni")
 
+import("${dir_pw_build}/python.gni")
 import("${freertos_root}/freertos.gni")
 import("${mbedtls_root}/mbedtls.gni")
 import("ti_simplelink_board.gni")
@@ -63,7 +66,7 @@ template("ti_sysconfig") {
     }
   }
 
-  action("${target_name}_gen") {
+  pw_python_action("${target_name}_gen") {
     script = "${ti_simplelink_sdk_build_root}/run_sysconfig.py"
     sources = invoker.sources
     outputs = gen_outputs
@@ -227,6 +230,7 @@ template("ti_simplelink_sdk") {
       "${chip_root}/third_party/ti_simplelink_sdk:freertos",
       "${chip_root}/third_party/ti_simplelink_sdk:mbedtls",
       "${chip_root}/third_party/ti_simplelink_sdk:ti_simplelink_sysconfig",
+      "${openthread_root}/src/core:libopenthread_core_headers",
     ]
 
     configs -= [ "${build_root}/config/compiler:std_default" ]