项目场景：

利用msys2和vscode配置opencv环境

---

过程

1.下载msys2
进入清华源 https://mirrors.tuna.tsinghua.edu.cn/msys2/distrib/x86_64/,选择对应版本，注意系统架构。
下载后缀为.exe的

2.中断网络开始安装msys2，否则会卡在50%。
好像是签名校验要访问外网获取公钥，但国内访问不了，所以断网让本地公钥验证就行
3.改镜像源
打开自己喜欢的终端（推荐的ucrt64 ），输入命令

sed -i "s#https\?://mirror.msys2.org/#https://mirrors.tuna.tsinghua.edu.cn/msys2/#g" /etc/pacman.d/mirrorlist*

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4.配置环境变量
详情请看这位博主，写得非常好
https://www.cnblogs.com/x420520/p/18489367
一是msys2的，二是ucrt64的

5.更新索引和软件，下载需要的东西（注意：不同终端对应软件名不一样，自行修改）

pacman -Syu
pacman -S mingw-w64-ucrt-x86_64-toolchain
pacman -S mingw-w64-x86_64-opencv
pacman -S mingw-w64-x86_64-qt6-base

6.配置vscode
在项目目录下新建.vscode,建立三个配置文件

展开查看代码

{
    "configurations": [
        {
            "name": "UCRT64",
            "includePath": [
                "${workspaceFolder}/**",
                "E:/msys64/ucrt64/include/**",
                "E:/msys64/ucrt64/include/opencv4/opencv2/**"
            ],
            "defines": [
                "_DEBUG",
                "UNICODE",
                "_UNICODE"
            ],
            "compilerPath": "E:/msys64/ucrt64/bin/g++.exe",
            "cStandard": "c17",
            "cppStandard": "c++17",
            "intelliSenseMode": "windows-gcc-x64"
        }
    ],
    "version": 4
}
    

展开查看代码

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug OpenCV Project",
            "type": "cppdbg",
            "request": "launch",
            "program": "${fileDirname}/${fileBasenameNoExtension}.exe",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${fileDirname}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "E:/msys64/ucrt64/bin/gdb.exe",
            "setupCommands": [
                {
                    "description",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ],
            "preLaunchTask": "Build OpenCV Project"
        }
    ]
}
    

展开查看代码

{
  "tasks": [
    {
      "type": "cppbuild",
      "label": "C/C++: g++.exe 生成活动文件 (UCRT64)",
      "command": "E:/msys64/ucrt64/bin/g++.exe",
      "args": [
        "-fdiagnostics-color=always",
        "-g",
        "${file}",
        "-o",
        "${fileDirname}\\${fileBasenameNoExtension}.exe",
        "-I",
        "E:/msys64/ucrt64/include/opencv4",
        "-L",
        "E:/msys64/ucrt64/lib",
        "-l",
        "opencv_core",
        "-l",
        "opencv_imgcodecs",
        "-l",
        "opencv_highgui",
        "-l",
        "opencv_imgproc"
      ],
      "options": {
        "cwd": "${fileDirname}"
      },
      "problemMatcher": [
        "$gcc"
      ],
      "group": {
        "kind": "build",
        "isDefault": true
      },
      "detail": "使用 UCRT64 编译 OpenCV 程序"
    }
  ],
  "version": "2.0.0"
}
    

结束。