VSCode调试多个C++文件时出现prelaunch任务错误如何解决？

核心错误原因 #

tasks.json中配置的编译工作目录错误：你当前将编译任务的options.cwd设置为C:\\MinGW\\bin，编译器执行时会在该目录下匹配*.cpp规则，无法找到你项目文件夹内的C++源文件，导致编译失败触发prelaunch任务报错。

次要待修复项 #

launch.json中的miDebuggerPath路径存在转义错误，C:\\MinGW\bin\\gdb.exe中\bin的反斜杠未完成转义，可能导致gdb调试器无法正常识别。 #

修复后的配置文件 #

tasks.json #

{
    "version": "2.0.0",
    "tasks": [
      {
        "type": "shell",
        "label": "g++.exe build active file",
        "command": "C:\\MinGW\\bin\\g++.exe",
        "args": [
          "-g",
          "*.cpp",
          "-o",
          "${fileDirname}\\${fileBasenameNoExtension}.exe"
        ],
        "options": {
          "cwd": "${fileDirname}"
        }
      },
      {
        "type": "shell",
        "label": "g++ build & run active file",
        "command": "C:\\MinGW\\bin\\g++.exe",
        "args": [
          "*.cpp",
          "-o",
          "${fileDirname}\\${fileBasenameNoExtension}.exe"
        ],
        "options": {
          "cwd": "${fileDirname}"
        }
      }
    ]
}

launch.json #

{
    "version": "0.2.0",
        "configurations": [
            {
                "name": "g++.exe build and debug active file",
                "type": "cppdbg",
                "request": "launch",
                "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
                "args": [],
                "stopAtEntry": false,
                "cwd": "${fileDirname}",
                "environment": [],
                "externalConsole": false,
                "MIMode": "gdb",
                "miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
                "setupCommands": [
                    {
                        "description": "Enable pretty-printing for gdb",
                        "text": "-enable-pretty-printing",
                        "ignoreFailures": true
                    }
                ],
                "preLaunchTask": "g++.exe build active file"
            },
            {
                "name": "g++ build & run active file",
                "type": "cppdbg",
                "request": "launch",
                "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
                "args": [],
                "stopAtEntry": false,
                "cwd": "${fileDirname}",
                "environment": [],
                "externalConsole": false,
                "MIMode": "gdb",
                "miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
                "setupCommands": [
                    {
                        "description": "Enable pretty-printing for gdb",
                        "text": "-enable-pretty-printing",
                        "ignoreFailures": true
                    }
                ],
                "preLaunchTask": "g++ build & run active file"
            }
        ]
}

注意事项 #

• 所有C++源文件需要和当前调试打开的文件在同一目录下，*.cpp规则才能正常匹配所有源文件
• 配置修改完成后重启VSCode再执行调试，避免旧配置缓存导致异常

内容的提问来源于stack exchange，提问作者Ken Za