linux平台用c++如何连接亚马逊平台的aws iot core，与设备进行交互，如何编写Ｃmakelists.txt

连接AWS IoT Core需要使用AWS IoT Device SDK for C++，该SDK提供了C++ API和MQTT协议支持。下面是一个简单的示例代码：

#include <aws/iot/MqttClient.h>
#include <aws/iot/Shadow.h>

using namespace Aws::Iot::MqttClient;
using namespace Aws::Iot::Shadow;

// 设置连接参数
MqttClientConnectionConfig config;
config.hostName = "xxxxxxxxxxxxxx-ats.iot.xx-xxxx-x.amazonaws.com";
config.port = 8883;
config.caFile = "rootCA.pem";
config.certFile = "cert.pem.crt";
config.privateKeyFile = "private.pem.key";

// 创建MQTT客户端
MqttClient mqttClient(config);

// 连接MQTT服务器
mqttClient.Connect();

// 创建设备影子客户端
ShadowClient shadowClient(mqttClient);

// 获取设备影子状态
ShadowGetRequest getRequest("myThingName");
ShadowGetResponse getResponse = shadowClient.Get(getRequest);

// 更新设备影子状态
ShadowUpdateRequest updateRequest("myThingName");
updateRequest.SetState("{\"state\":{\"reported\":{\"temperature\":25}}}");
ShadowUpdateResponse updateResponse = shadowClient.Update(updateRequest);

对于CMakeLists.txt文件，需要添加AWS IoT Device SDK for C++的依赖库和头文件路径：

cmake_minimum_required(VERSION 3.5)

project(my_project)

# 添加AWS IoT Device SDK for C++的依赖库和头文件路径
find_package(aws-sdk-cpp REQUIRED COMPONENTS iot mqtt shadow)
include_directories(${AWSSDK_INCLUDE_DIR})

# 添加可执行文件
add_executable(my_executable main.cpp)

# 链接AWS IoT Device SDK for C++的库
target_link_libraries(my_executable ${AWSSDK_LINK_LIBRARIES})

以上只是一个简单的示例代码和CMakeLists.txt文件，具体还需要根据实际情况进行调整。