Openwrt、x86Linux及交叉编译Azure IoT Hub SDK

雨点打透心脏的1/2处 2023-07-09 07:24 25阅读 0赞

### 下载azure及其子项目： ###

git clone --recursive  https://github.com/Azure/azure-iot-sdk-c.git

或者

git clone  https://github.com/Azure/azure-iot-sdk-c.git
    cd azure-iot-sdk-c
    git submodule update --init

#### 在x86 Linux中本机构建Azure IoT Hub SDK： ####

可以参考[https://github.com/Azure/azure-iot-sdk-c/blob/master/doc/devbox\_setup.md][https_github.com_Azure_azure-iot-sdk-c_blob_master_doc_devbox_setup.md]

cd ~/azure-iot-sdk-c/build_all/linux
    #安装依赖
    #./setup.sh
    #修改build.sh文件 选择是否编译各个子项目以及修改生成SDK路径
    #如 build_folder=$build_root"/linux_sdk"
    ./build.sh

#### 交叉编译 Azure IoT Hub SDK ####

可以参考[https://github.com/Azure/azure-iot-sdk-c/blob/master/doc/SDK\_cross\_compile\_example.md][https_github.com_Azure_azure-iot-sdk-c_blob_master_doc_SDK_cross_compile_example.md]

cd ~/azure-iot-sdk-c/build_all/linux

**创建工具链文件**

#vi cross.cmake
    
    INCLUDE(CMakeForceCompiler)
     
    SET(CMAKE_SYSTEM_NAME Linux)     # this one is important
    SET(CMAKE_SYSTEM_VERSION 1)     # this one not so much
     
    # this is the location of the cross toolchain targeting your device
    SET(CMAKE_C_COMPILER /home/hzlarm/openwrt/gateway_openwrt_19.07_g1/staging_dir/toolchain-mipsel_24kc_gcc-7.4.0_musl/bin/mipsel-openwrt-linux-musl-gcc)
    
    # this is the file system root of the target
    SET(CMAKE_FIND_ROOT_PATH /home/hzlarm/openwrt/gateway_openwrt_19.07_g1/staging_dir/target-mipsel_24kc_musl)
    
    # search for programs in the build host directories
    SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
    
    # for libraries and headers in the target directories
    SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
    
    # system location of target device
    SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

**修改build.sh文件** 选择是否编译各个子项目以及修改生成SDK路径 如：`build_folder=$build_root"/cross_sdk"`

cd ~/Source/azure-iot-sdk-c/build_all/linux
    ./build.sh --toolchain-file cross.cmake -cl  --sysroot=/home/hzlarm/openwrt/gateway_openwrt_19.07_g1/staging_dir/target-mipsel_24kc_musl

#出现警告 mipsel-openwrt-linux-musl-gcc: warning: environment variable 'STAGING_DIR' not defined
    export STAGING_DIR=/home/hzlarm/openwrt/gateway_openwrt_19.07_g1/staging_dir

#### 在Openwrt中编译 Azure IoT Hub SDK ####

官方提供的openwrt编译方法在`azure-iot-sdk-c/build_all/arduino`路径

如下几个脚本：

`setup.sh` 设置下载openwrt\_sdk的目录，默认为 `$HOME`

`setup_sdk.sh` 由setup.sh调用来下载openwrt的脚本

`build.sh` 编译脚本核心内容如下

#vi build.sh
    
    #设置openwrt的路径
    sdk_root="$HOME"
    openwrt_folder="openwrt"
    openwrt_sdk_folder="gateway_openwrt_19.07_g1"
    working_dir=$PWD
    iot_dir="azure-iot-sdk-c"
    ....
    
    build_iot()
    { 
        echo "Building IoT"
        rm -d -f -r $sdk_root/$openwrt_folder/$openwrt_sdk_folder/package/$iot_dir
        mkdir $sdk_root/$openwrt_folder/$openwrt_sdk_folder/package/$iot_dir
        mkdir $sdk_root/$openwrt_folder/$openwrt_sdk_folder/package/$iot_dir/src
        cp -f "$working_dir/Makefile.iot" "$sdk_root/$openwrt_folder/$openwrt_sdk_folder/package/$iot_dir/Makefile"
        cd "$working_dir/../../.."
        cp -R -f . "$sdk_root/$openwrt_folder/$openwrt_sdk_folder/package/$iot_dir/src"
        cd "$sdk_root/$openwrt_folder/$openwrt_sdk_folder"
        #可以先注释，修改根据需要修改Makefile后再编译
        #make V=s "package/$iot_dir/compile"
    }

在Makefile文件：可以[参考][Link 1]

#define Build/Configure中可以选择需要编译的模块
    cmake -DCMAKE_FIND_ROOT_PATH="$(TOOLCHAIN_DIR)" $(PKG_BUILD_DIR)/CMakeLists.txt -DIN_OPENWRT=1 -Duse_amqp:bool=ON -Duse_http:bool=ON     -Duse_mqtt:bool=on -Duse_floats:bool=OFF -Duse_condition:bool=OFF

如果没有openwrt包先执行`setup.sh`下载，有则执行`./build.sh`

[https_github.com_Azure_azure-iot-sdk-c_blob_master_doc_devbox_setup.md]: https://github.com/Azure/azure-iot-sdk-c/blob/master/doc/devbox_setup.md
[https_github.com_Azure_azure-iot-sdk-c_blob_master_doc_SDK_cross_compile_example.md]: https://github.com/Azure/azure-iot-sdk-c/blob/master/doc/SDK_cross_compile_example.md
[Link 1]: https://blog.csdn.net/hzlarm/article/details/102970236