进入调试口，需要本地和远程都装C/C++ estension
下面是在调mpi_enc_test的launch.json
文件自己make生成的 makefile 没改过
args项是输入参数，配置了相机输入，具体参数看他的demo说明，
记录一下，方便以后拷贝方便

{
    // 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) 启动",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/test/mpi_enc_test",
            "args": [ "-i", "/dev/video0", "-f", "8", "-w", "1280", "-h", "720", "-o", "o1.h264", "-t", "7", "-n", "120"],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                {
                    "description": "为 gdb 启用整齐打印",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "将反汇编风格设置为 Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ],
            // "preLaunchTask":"Build",
            "miDebuggerPath": "/usr/local/bin/gdb"
        }
    ]
}