Configuration tips for building Linux smart city applications using CMake

Configuration tips for using CMake to build Linux smart city applications

Abstract: This article will introduce the configuration tips for using CMake to build Linux smart city applications. Using CMake simplifies the build process and provides flexibility and maintainability. This article details how to configure CMake to build a smart city application and provides corresponding code examples.

Introduction: Linux, as an open and customizable operating system, has been widely used in smart city applications. To be able to efficiently build smart city applications, developers need a powerful and flexible build tool. CMake, as a cross-platform build automation tool, provides convenience for building Linux applications. This article will take a smart city application as an example to introduce the configuration skills of CMake and how to use it to build Linux smart city applications.

1. Installing CMake

First, we need to install CMake on the Linux system. You can execute the following command on the command line to install CMake:

$ sudo apt-get install cmake

2. Create a CMakeLists.txt file

Create a file named CMakeLists.txt in the root directory of the project file that will be used to describe the project's build rules. In this file, we can set the project name, version number, link library, source files, etc.

The following is an example CMakeLists.txt file:

# CMake 最低版本要求
cmake_minimum_required(VERSION 3.10.0)

# 项目名称
project(SmartCityApp)

# 设置C++标准
set(CMAKE_CXX_STANDARD 11)

# 添加链接库
find_library(MYSQL_LIBRARY mysqlclient REQUIRED)

# 添加头文件
include_directories(include)

# 添加可执行文件
add_executable(SmartCityApp src/main.cpp src/sensor.cpp)

# 链接库
target_link_libraries(SmartCityApp ${MYSQL_LIBRARY})

In the above code example, we first specified that the minimum version requirement of CMake is 3.10.0. Then, we defined the project name as SmartCityApp. Next, we set the C standard to C 11. Then, we use the find_library instruction to find the link library named mysqlclient and assign it to the MYSQL_LIBRARY variable. We use the include_directories directive to add header file directories to find the location of header files. Then, we use the add_executable directive to add an executable file SmartCityApp and specify the location of the source file. Finally, we use the target_link_libraries directive to specify the libraries that need to be linked. In this example, we link the mysqlclient library to the SmartCityApp executable.

3. Build the project

Before using CMake to build the project, we need to create a folder named build in the root directory of the project and under this folder Execute the following command:

$ cd build
$ cmake ..
$ make

Through the above steps, CMake will generate a Makefile based on the configuration rules in the CMakeLists.txt file. Then execute the Makefile through the make command to complete the construction of the project.

4. Run the application

After the build is successful, the generated executable file SmartCityApp can be found under the build folder. The application can be run by executing the following command at the command line:

$ ./SmartCityApp

With the above steps, we can successfully build a Linux smart city application using CMake.

Conclusion: This article explains how to use CMake to build smart city applications. With CMake, we can simplify the build process and provide flexibility and maintainability. In this article, we show a configuration example for building a Linux smart city application using CMake and provide corresponding code examples. I hope this article will be helpful to developers who plan to use CMake to build Linux smart city applications.

References:
[1] https://cmake.org/
[2] https://cmake.org/cmake/help/latest/
[3] https ://www.cyberciti.biz/faq/install-apt-get-ubuntu-16-04/
[4] https://linuxize.com/post/how-to-use-cmake-to-build -c-projects/

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