设置 Vscode 以调试 Eigen

问题描述

我正在使用 Eigen 库 (https://eigen.tuxfamily.org/dox/GettingStarted.html) 进行一些计算。

我正在运行的程序是：

#include <iostream>
#include <Eigen/Dense>
 
using Eigen::MatrixXd;
 
int main()
{
  MatrixXd m(2,2);
  m(0,0) = 3;
  m(1,0) = 2.5;
  m(0,1) = -1;
  m(1,1) = m(1,0) + m(0,1);
  std::cout << m << std::endl;
}

在他们的文档中推荐编译：

g++ -I /path/to/eigen/ my_program.cpp -o my_program

如果我运行它，它会编译并运行......但现在我希望能够通过代码进行调试。

我正在使用的 .json 文件是：

tasks.json

{
    "tasks": [
        {
            "type": "cppbuild","label": "C/C++: g++ build active file","command": "/usr/bin/g++","args": [
                "-I","${eigen}","${file}","-o","${fileDirname}/${fileBasenameNoExtension}"
            ],"options": {
                "cwd": "${fileDirname}"
            },"problemmatcher": [
                "$gcc"
            ],"group": {
                "kind": "build","isDefault": true
            },"detail": "Task generated by Debugger."
        }
    ],"version": "2.0.0"
}

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": "g++ - Build and debug active file","type": "cppdbg","request": "launch","program": "${fileDirname}/${fileBasenameNoExtension}","args": [],"stopAtEntry": false,"cwd": "${fileDirname}","environment": [],"externalConsole": false,"MIMode": "gdb","setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb","text": "-enable-pretty-printing","ignoreFailures": true
                }
            ],"prelaunchTask": "C/C++: g++ build active file","miDebuggerPath": "/usr/bin/gdb"
        }
    ]
}

和

c_cpp_properties.json

{
    "configurations": [
        {
            "name": "Linux","includePath": [
                "${workspaceFolder}/**","/home/pc/eigen/" 
            ],"defines": [],"compilerPath": "/usr/bin/gcc","cStandard": "c11","cppStandard": "c++11","intelliSenseMode": "clang-x64"
        }
    ],"version": 4
}

此配置仅运行代码，但不会将调试器粘贴到代码中。

非常感谢您的帮助！

解决方法

好的，所以这对我有用：

1º 下载特征：

https://eigen.tuxfamily.org/index.php?title=Main_Page

2º 创建指向本征文件夹的符号链接

sudo ln -s location/of/Eigen/Folder  /usr/local/include/

3º 可以编译代码：

g++ my_program.cpp -o my_program

4º 为了“更好地调试”Eigen 使用 gdb 的自定义 python 打印机

https://gitlab.com/libeigen/eigen/-/blob/master/debug/gdb/printers.py

a) Create a hidden file called gdbinit 
    touch ~/.gdbinit
b) Place the following code in it:
    python
    import sys
    sys.path.insert(0,'/path/to/eigen/printer/directory')  #In my case it was /home/pc/eigen/debug/gdb
    from printers import register_eigen_printers
    register_eigen_printers (None)
    end

注意：VScode 开箱即用（F5 和调试模式已开启！）

eigen3 visual-studio-code vscode-debugger