Added compile support for NuttX system

This is a basic version of compile support and only x86 simulator
lightning-app is supported now

The compilation method is shown below:
./scripts/build/build_examples.py --target nuttx-x64-light build
and compiled binaries are in the out/nuttx-x64-light directory.

Detailed introduction about NuttX system can refer to this link:
https://github.com/apache/nuttx

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>

Author: zhhyu7

.github/.wordlist.txt

@@ -965,6 +965,7 @@ NTP
 nullable
 nullptr
 NUM
+NuttX
 NVM
 NVS
 nwdiag

.github/workflows/examples-nuttx.yaml

@@ -0,0 +1,60 @@
+# Copyright (c) 2024 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.
+
+name: Build example - NuttX
+
+on:
+  push:
+  pull_request:
+  merge_group:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}-${{ (github.event_name == 'pull_request' && github.event.number) || (github.event_name == 'workflow_dispatch' && github.run_number) || github.sha }}
+  cancel-in-progress: true
+
+env:
+  CHIP_NO_LOG_TIMESTAMPS: true
+
+jobs:
+  nuttx:
+    name: NuttX
+
+    runs-on: ubuntu-latest
+    if: github.actor != 'restyled-io[bot]'
+
+    container:
+      image: ghcr.io/project-chip/chip-build-nuttx:51
+      volumes:
+        - "/tmp/bloat_reports:/tmp/bloat_reports"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Checkout submodules & Bootstrap
+        uses: ./.github/actions/checkout-submodules-and-bootstrap
+        with:
+          platform: nuttx
+          extra-submodule-parameters: " --recursive"
+      - name: Set up environment for size reports
+        uses: ./.github/actions/setup-size-reports
+        if: ${{ !env.ACT }}
+        with:
+          gh-context: ${{ toJson(github) }}
+      - name: Build example simulator NuttX Lighting App
+        run: |
+          ./scripts/run_in_build_env.sh \
+            "./scripts/build/build_examples.py \
+              --target nuttx-x64-light \
+              build \
+            "

.github/workflows/lint.yml

@@ -90,6 +90,7 @@ jobs:
                      --skip-dir platform/webos \
                      --skip-dir platform/Zephyr \
                      --skip-dir test_driver \
+                     --skip-dir platform/NuttX \
                      --known-failure app/app-platform/ContentApp.cpp \
                      --known-failure app/app-platform/ContentApp.h \
                      --known-failure app/app-platform/ContentAppPlatform.cpp \
@@ -205,7 +206,7 @@ jobs:
                   # TODO: TLVDebug should ideally not be excluded here.
                   # TODO: protocol_decoder.cpp should ideally not be excluded here.
                   # TODO: PersistentStorageMacros.h should ideally not be excluded here.
-                  git grep -I -n "PRI.64" -- './*' ':(exclude).github/workflows/lint.yml' ':(exclude)examples/chip-tool' ':(exclude)examples/tv-casting-app' ':(exclude)src/app/MessageDef/MessageDefHelper.cpp' ':(exclude)src/app/tests/integration/chip_im_initiator.cpp' ':(exclude)src/lib/core/TLVDebug.cpp' ':(exclude)src/lib/dnssd/tests/TestTxtFields.cpp' ':(exclude)src/lib/format/protocol_decoder.cpp' ':(exclude)src/lib/support/PersistentStorageMacros.h' ':(exclude)src/messaging/tests/echo/echo_requester.cpp' ':(exclude)src/platform/Linux' ':(exclude)src/platform/Ameba' ':(exclude)src/platform/ESP32' ':(exclude)src/platform/Darwin' ':(exclude)src/darwin' ':(exclude)src/platform/webos' ':(exclude)zzz_generated/chip-tool' ':(exclude)src/tools/chip-cert/Cmd_PrintCert.cpp' && exit 1 || exit 0
+                  git grep -I -n "PRI.64" -- './*' ':(exclude).github/workflows/lint.yml' ':(exclude)examples/chip-tool' ':(exclude)examples/tv-casting-app' ':(exclude)src/app/MessageDef/MessageDefHelper.cpp' ':(exclude)src/app/tests/integration/chip_im_initiator.cpp' ':(exclude)src/lib/core/TLVDebug.cpp' ':(exclude)src/lib/dnssd/tests/TestTxtFields.cpp' ':(exclude)src/lib/format/protocol_decoder.cpp' ':(exclude)src/lib/support/PersistentStorageMacros.h' ':(exclude)src/messaging/tests/echo/echo_requester.cpp' ':(exclude)src/platform/Linux' ':(exclude)src/platform/Ameba' ':(exclude)src/platform/ESP32' ':(exclude)src/platform/Darwin' ':(exclude)src/darwin' ':(exclude)src/platform/webos' ':(exclude)zzz_generated/chip-tool' ':(exclude)src/tools/chip-cert/Cmd_PrintCert.cpp' ':(exclude)src/platform/NuttX' && exit 1 || exit 0
 
             # git grep exits with 0 if it finds a match, but we want
             # to fail (exit nonzero) on match.  And we want to exclude this file,

build/config/compiler/BUILD.gn

@@ -271,6 +271,11 @@ config("strict_warnings") {
 
   cflags_cc = [ "-Wnon-virtual-dtor" ]
 
+  if (current_os == "nuttx") {
+    cflags -= [ "-Wshadow" ]
+    cflags_cc -= [ "-Wnon-virtual-dtor" ]
+  }
+
   configs = []
   ldflags = []
 

config/nuttx/chip-gn/.gn

@@ -0,0 +1,29 @@
+# Copyright (c) 2024 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")
+
+# The location of the build configuration file.
+buildconfig = "${build_root}/config/BUILDCONFIG.gn"
+
+# CHIP uses angle bracket includes.
+check_system_includes = true
+
+default_args = {
+  target_cpu = ""
+  target_os = "nuttx"
+
+  import("${chip_root}/config/nuttx/chip-gn/args.gni")
+}

config/nuttx/chip-gn/BUILD.gn

@@ -0,0 +1,57 @@
+# Copyright (c) 2024 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("${chip_root}/build/chip/tests.gni")
+
+assert(current_os == "nuttx")
+
+declare_args() {
+  chip_build_example_providers = false
+  chip_example_lighting = false
+}
+
+static_library("nuttx") {
+  output_name = "libchipnuttx"
+
+  public_deps = [
+    "${chip_root}/examples/platform/linux:app-main",
+    "${chip_root}/src/lib",
+  ]
+
+  if (chip_build_tests) {
+    public_deps += [ "${chip_root}/src:tests" ]
+  }
+
+  if (chip_build_example_providers) {
+    public_deps += [ "${chip_root}/examples/providers:device_info_provider" ]
+  }
+
+  if (chip_example_lighting) {
+    public_deps += [
+      "${chip_root}/examples/lighting-app/lighting-common",
+      "${chip_root}/examples/lighting-app/lighting-common:lighting-manager",
+    ]
+  }
+
+  output_dir = "${root_out_dir}/lib"
+
+  complete_static_lib = true
+}
+
+group("default") {
+  deps = [ ":nuttx" ]
+}

config/nuttx/chip-gn/args.gni

@@ -0,0 +1,32 @@
+# Copyright (c) 2024 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("${chip_root}/src/crypto/crypto.gni")
+
+chip_device_platform = "nuttx"
+
+chip_build_tests = false
+
+chip_project_config_include = ""
+chip_system_project_config_include = ""
+chip_ble_project_config_include = ""
+
+chip_crypto = "mbedtls"
+chip_external_mbedtls = true
+
+custom_toolchain = "${chip_root}/config/nuttx/chip-gn/toolchain:nuttx"
+
+pw_build_PIP_CONSTRAINTS = [ "${chip_root}/scripts/setup/constraints.txt" ]

config/nuttx/chip-gn/toolchain/BUILD.gn

@@ -0,0 +1,33 @@
+# Copyright (c) 2024 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/toolchain/gcc_toolchain.gni")
+import("//build_overrides/build.gni")
+
+declare_args() {
+  nuttx_ar = ""
+  nuttx_cc = ""
+  nuttx_cxx = ""
+}
+
+gcc_toolchain("nuttx") {
+  ar = nuttx_ar
+  cc = nuttx_cc
+  cxx = nuttx_cxx
+
+  toolchain_args = {
+    current_os = "nuttx"
+    is_clang = false
+  }
+}

examples/lighting-app/linux/main.cpp

@@ -95,7 +95,7 @@ void ApplicationShutdown()
     }
 }
 
-int main(int argc, char * argv[])
+extern "C" int main(int argc, char * argv[])
 {
     if (ChipLinuxAppInit(argc, argv) != 0)
     {

scripts/build/build/targets.py

@@ -27,6 +27,7 @@
 from builders.mbed import MbedApp, MbedBoard, MbedBuilder, MbedProfile
 from builders.mw320 import MW320App, MW320Builder
 from builders.nrf import NrfApp, NrfBoard, NrfConnectBuilder
+from builders.nuttx import NuttXApp, NuttXBoard, NuttXBuilder
 from builders.nxp import NxpApp, NxpBoard, NxpBuilder
 from builders.openiotsdk import OpenIotSdkApp, OpenIotSdkBuilder, OpenIotSdkCryptoBackend
 from builders.qpg import QpgApp, QpgBoard, QpgBuilder
@@ -320,6 +321,22 @@ def BuildNrfTarget():
     return target
 
 
+def BuildNuttXTarget():
+    target = BuildTarget('nuttx', NuttXBuilder)
+
+    # Boards
+    target.AppendFixedTargets([
+        TargetPart('x64', board=NuttXBoard.SIM),
+    ])
+
+    # Apps
+    target.AppendFixedTargets([
+        TargetPart('light', app=NuttXApp.LIGHT),
+    ])
+
+    return target
+
+
 def BuildAndroidTarget():
     target = BuildTarget('android', AndroidBuilder)
 
@@ -790,6 +807,7 @@ def BuildOpenIotSdkTargets():
     BuildMW320Target(),
     BuildNrfTarget(),
     BuildNrfNativeTarget(),
+    BuildNuttXTarget(),
     BuildQorvoTarget(),
     BuildStm32Target(),
     BuildTizenTarget(),