Support building CHIP with GN

.gitignore

@@ -20,6 +20,9 @@ configure
 src/include/BuildConfig.h.in
 src/include/BuildConfig.h.in~
 
+# GN build system
+out/
+
 # Repos stuff
 .repos-warning-stamp
 

.gn

@@ -0,0 +1,28 @@
+# 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.
+
+# The location of the build configuration file.
+buildconfig = "//build/config/BUILDCONFIG.gn"
+
+# CHIP uses angle bracket includes.
+check_system_includes = true
+
+# Allow loading paths relative to //gn.
+secondary_source = "//gn/"
+
+import("//gn/build_overrides/pigweed.gni")
+
+default_args = {
+  pw_unit_test_AUTOMATIC_RUNNER = "$dir_pigweed/targets/host/run_test"
+}

BUILD.gn

@@ -0,0 +1,163 @@
+# 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/chip.gni")
+import("//build_overrides/mbedtls.gni")
+import("//build_overrides/nlassert.gni")
+import("//build_overrides/nlio.gni")
+import("//build_overrides/nlunit_test.gni")
+import("//build_overrides/pigweed.gni")
+
+# This build file should not be used in superproject builds.
+assert(chip_root == "//")
+
+import("//build/tests.gni")
+import("//build/tools.gni")
+
+if (current_toolchain != "${dir_pw_toolchain}/dummy:dummy") {
+  # This is a real toolchain. Build CHIP.
+  group("default") {
+    deps = [ ":all" ]
+  }
+
+  group("all") {
+    deps = [
+      "${chip_root}/src/app",
+      "${chip_root}/src/ble",
+      "${chip_root}/src/controller",
+      "${chip_root}/src/crypto",
+      "${chip_root}/src/inet",
+      "${chip_root}/src/lib",
+      "${chip_root}/src/lib/core",
+      "${chip_root}/src/lib/support",
+      "${chip_root}/src/lwip:all",
+      "${chip_root}/src/system",
+      "${chip_root}/src/transport",
+      "${mbedtls_root}:mbedtls",
+      "${nlassert_root}:nlassert",
+      "${nlio_root}:nlio",
+      "${nlunit_test_root}:nlunit-test",
+    ]
+
+    if (chip_build_tests) {
+      deps += [ ":tests" ]
+    }
+
+    if (chip_build_tools) {
+      deps += [
+        "${chip_root}/examples/chip-tool",
+        "${chip_root}/examples/shell",
+        "${chip_root}/src/lib/shell",
+        "${chip_root}/src/qrcodetool",
+        "${chip_root}/src/setup_payload",
+      ]
+    }
+  }
+
+  if (chip_build_tests) {
+    import("//build/chip_test_group.gni")
+
+    chip_test_group("tests") {
+      deps = [
+        "${chip_root}/src/app/plugin/tests",
+        "${chip_root}/src/ble/tests",
+        "${chip_root}/src/crypto/tests",
+        "${chip_root}/src/inet/tests",
+        "${chip_root}/src/lib/core/tests",
+        "${chip_root}/src/lib/support/tests",
+        "${chip_root}/src/lwip/tests",
+        "${chip_root}/src/setup_payload/tests",
+        "${chip_root}/src/system/tests",
+        "${chip_root}/src/transport/tests",
+      ]
+    }
+
+    group("check") {
+      deps = [ ":tests_run" ]
+    }
+  }
+} else {
+  # This is the dummy toolchain. Configure various real toolchains.
+  import("//build/chip_build.gni")
+  declare_args() {
+    # Set this to false to disable all builds by default.
+    enable_default_builds = true
+  }
+
+  declare_args() {
+    # Enable building chip with clang.
+    enable_host_clang_build = enable_default_builds
+
+    # Enable building chip with gcc.
+    enable_host_gcc_build = enable_default_builds
+
+    # Build building chip with gcc & mbedtls.
+    enable_host_gcc_mbdtls_build = enable_default_builds
+
+    # Build the nRF5 lock app example.
+    enable_nrf5_lock_app_build = false
+  }
+
+  if (enable_nrf5_lock_app_build) {
+    import("//build_overrides/nrf5_lock_app.gni")
+  }
+
+  import("//build/toolchain/host_clang/toolchains.gni")
+  import("//build/toolchain/host_gcc/toolchains.gni")
+  chip_build("host_clang") {
+    toolchain = "//build/toolchain/host_clang:${host_os}_${host_cpu}_clang"
+  }
+
+  chip_build("host_gcc") {
+    toolchain = "//build/toolchain/host_gcc:${host_os}_${host_cpu}_gcc"
+  }
+
+  chip_build("host_gcc_mbedtls") {
+    toolchain = "//build/toolchain/host_gcc:${host_os}_${host_cpu}_gcc_mbedtls"
+  }
+
+  group("default") {
+    deps = []
+    if (enable_host_clang_build) {
+      deps += [ ":all_host_clang" ]
+    }
+    if (enable_host_gcc_build) {
+      deps += [ ":all_host_gcc" ]
+    }
+    if (enable_host_gcc_mbdtls_build) {
+      deps += [ ":all_host_gcc_mbedtls" ]
+    }
+    if (enable_nrf5_lock_app_build) {
+      deps += [ "${nrf5_lock_app_root}:nrf5(${nrf5_lock_app_root}/toolchain:nrf5_lock_app)" ]
+    }
+  }
+
+  if (chip_build_tests) {
+    group("check") {
+      deps = []
+      if (enable_host_clang_build) {
+        deps += [ ":check_host_clang" ]
+      }
+      if (enable_host_gcc_build) {
+        deps += [ ":check_host_gcc" ]
+      }
+      if (enable_host_gcc_mbdtls_build) {
+        deps += [ ":check_host_gcc_mbedtls" ]
+      }
+      if (enable_nrf5_lock_app_build) {
+        deps += [ ":default" ]
+      }
+    }
+  }
+}

examples/chip-tool/BUILD.gn

@@ -0,0 +1,31 @@
+# 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/chip.gni")
+
+import("//build/tools.gni")
+
+assert(chip_build_tools)
+
+executable("chip-standalone-demo") {
+  sources = [ "main.cpp" ]
+
+  public_deps = [ "${chip_root}/src/lib" ]
+
+  output_dir = "${root_out_dir}/bin"
+}
+
+group("chip-tool") {
+  deps = [ ":chip-standalone-demo" ]
+}

examples/lock-app/nrf5/.gn

@@ -0,0 +1,26 @@
+# 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.
+
+# The location of the build configuration file.
+buildconfig = "//build/config/BUILDCONFIG.gn"
+
+# CHIP uses angle bracket includes.
+check_system_includes = true
+
+# Allow loading paths relative to //gn.
+secondary_source = "//third_party/connectedhomeip/gn/"
+
+default_args = {
+  import("//args.gni")
+}

examples/lock-app/nrf5/BUILD.gn

@@ -0,0 +1,88 @@
+# 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/chip.gni")
+import("//build_overrides/nrf5_sdk.gni")
+
+import("${nrf5_sdk_build_root}/nrf5_sdk.gni")
+
+assert(current_os == "freertos")
+
+nrf5_platform_dir = "${chip_root}/examples/platform/nrf528xx"
+
+nrf5_sdk("sdk") {
+  include_dirs = [
+    "main/include",
+    "main",
+    "${chip_root}/src/include",
+    "${nrf5_platform_dir}/app/project_include",
+    "${nrf5_platform_dir}/util/include",
+    "${nrf5_platform_dir}/app/include",
+  ]
+
+  sources = [
+    "${nrf5_platform_dir}/app/project_include/CHIPProjectConfig.h",
+    "${nrf5_platform_dir}/app/project_include/FreeRTOSConfig.h",
+    "${nrf5_platform_dir}/app/project_include/OpenThreadConfig.h",
+    "${nrf5_platform_dir}/app/project_include/freertos_tasks_c_additions.h",
+    "${nrf5_platform_dir}/app/project_include/nrf_log_ctrl_internal.h",
+    "main/include/app_config.h",
+  ]
+
+  defines = []
+  if (is_debug) {
+    defines += [ "BUILD_RELEASE=0" ]
+  } else {
+    defines += [ "BUILD_RELEASE=1" ]
+  }
+
+  defines += [ "USE_APP_CONFIG" ]
+}
+
+executable("lock_app") {
+  public_deps = [
+    ":sdk",
+    "${chip_root}/src/lib",
+  ]
+
+  sources = [
+    "${nrf5_platform_dir}/app/Server.cpp",
+    "${nrf5_platform_dir}/app/chipinit.cpp",
+    "${nrf5_platform_dir}/app/include/Server.h",
+    "${nrf5_platform_dir}/app/include/chipinit.h",
+    "${nrf5_platform_dir}/app/support/CXXExceptionStubs.cpp",
+    "${nrf5_platform_dir}/app/support/FreeRTOSNewlibLockSupport.c",
+    "${nrf5_platform_dir}/app/support/nRF5Sbrk.c",
+    "${nrf5_platform_dir}/util/LEDWidget.cpp",
+    "${nrf5_platform_dir}/util/include/LEDWidget.h",
+    "main/AppTask.cpp",
+    "main/BoltLockManager.cpp",
+    "main/DataModelHandler.cpp",
+    "main/include/AppEvent.h",
+    "main/include/AppTask.h",
+    "main/include/BoltLockManager.h",
+    "main/include/DataModelHandler.h",
+    "main/main.cpp",
+  ]
+
+  output_dir = root_out_dir
+
+  ldscript = "${nrf5_platform_dir}/app/ldscripts/chip-nrf52840-example.ld"
+
+  ldflags = [ "-T" + rebase_path(ldscript, root_build_dir) ]
+}
+
+group("nrf5") {
+  deps = [ ":lock_app" ]
+}

examples/lock-app/nrf5/args.gni

@@ -0,0 +1,24 @@
+# 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/nrf5_lock_app.gni")
+import("${nrf5_lock_app_root}/common_args.gni")
+
+# These values help set up the default toolchain in standalone sample app
+# builds. They must be in a separate file to avoid namespace conflicts in
+# multi target builds.
+custom_toolchain = "${nrf5_lock_app_root}/toolchain:nrf5_lock_app"
+target_cpu = "arm"
+target_os = "freertos"
+# Don't add more args here, add them to common_args.gni.

examples/lock-app/nrf5/build

@@ -0,0 +1 @@
+../../../build

examples/lock-app/nrf5/build_overrides/chip.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 CHIP.
+  chip_root = "//third_party/connectedhomeip"
+}