1 CMakeLists.txt编写

cmake_minimum_required(VERSION 3.12)

project(djl_plm)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -g")

add_executable(simple simple.cpp)
add_executable(main main.cpp)


include_directories(include)

相当于如下gcc命令：

g++ simple.cpp -std=c++17 -Iinclude -o simple -g

2 Cmake构建方法

根目录下创建build目录

mkdir build

进入build目录

cd build

执行cmake构建命令

cmake ..

执行make编译命令

make

注意：一旦代码被修改了，就需要重新构建

3 VScode 调试方法

task.json配置

{   
    "version": "2.0.0",
    "options": {
        "cwd": "${workspaceFolder}/build"
    },
    "tasks": [
        {
            "type": "shell",
            "label": "cmake",
            "command": "cmake",
            "args": [
                ".."
            ]
        },
        {
            "label": "make",
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "command": "make",
            "args": [

            ]
        },
        {
            "label": "Build",
			"dependsOrder": "sequence", // 按列出的顺序执行任务依赖项
            "dependsOn":[
                "cmake",
                "make"
            ]
        }
    ]

}

launch.json配置

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "C/C++: g++ build and debug active file",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/build/main",  //main：被调试的程序文件
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "/usr/bin/gdb",
            "setupCommands": [
              {
                "description": "Enable pretty-printing for gdb",
                "text": "-enable-pretty-printing",
                "ignoreFailures": true
              }
            ],
            "preLaunchTask": "Build"
          }

    ]
}

优点：按下F5即可调试，并且每次修改代码后不再需要手动cmake编译构建。

项目目录结构如下：