nannanziyu

@mingmeng
https://twitter.com/MSEdgeDev/status/1289025615442534400
上午 10:30 就修复了
我觉得应该是 google 的 API 在未通知的情况下变化了，但是微软没有正确处理异常，直接崩了

MacOS 平台上的应用程序还是比较齐全的，像有些 Linux 软件不提供 Windows 包、有些 Windows 软件不提供 Linux 包，但基本都会提供 MacOS 的包。
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???

@xiaoming1992

绿框的是 posix thread 的 MinGW，编译 opencv 成功
红框的是用 win32 thread 的 MinGW，报错 std::recursive_mutex 不存在

@xiaoming1992
1. 不是的，opencv 版本不对，只会导致 link 失败，编译是会通过的
2. 你用的是 win32 thread 的 MinGW-64，所以会提示不存在 std::recursive_mutex

task.json
{
// See https://go.microsoft.com/fwlink/?LinkId=733558
// for the documentation about the tasks.json format
"version": "2.0.0",
"tasks": [
{
"label": "build",
"type": "shell",
"command": "g++",
"args": [
"${file}",
"-g",
"-std=c++17",
"-Wall",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe",
"-I",
"F:/Download/OpenCV-MinGW-Build-OpenCV-4.1.1-x64/include",
"-LF:/Download/OpenCV-MinGW-Build-OpenCV-4.1.1-x64/x64/mingw/lib",
"-llibopencv_core411",
"-llibopencv_imgcodecs411",
"-llibopencv_highgui411"
]
}
]
}

launch.json
{
// 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": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/${fileBasenameNoExtension}.exe",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"miDebuggerPath": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "build"
}
]
}

1. recursive_mutex 属于 posix thread，所以你的 gcc 要下载 posix thread 的
比如用 MinGW-64
https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/
下载这个页面中的 x86_64-posix-seh
2. opencv 也要下载对应的 build
https://github.com/huihut/OpenCV-MinGW-Build，不然可以编译，但无法 link
3. vs2019 很小，最小安装只要 800M 。大是因为你把 msvc 和 sdk 都装上了

@xiaoming1992
c_cpp_properties.json 里的 inlucdePath 只用于 Code Intelligence
你要在 tasks.json 里用 -I 参数来对 build 命令行增加 Include Path
比如

"command": "g++",
"args": [
"${file}",
"-g",
"-std=c++17",
"-Wall",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe",
"-I",
"C:/cpp-libs/opencv/build/include",
]

能帮我写个 office 吗？只要比 ms office 好用就可以

然后还有 4 楼说的，你的 k 不能传引用，要传值
改成
std::thread t1([&,k]() {
});