ld:找不到架构x86_64的符号-错误 [英] ld: symbol(s) not found for architecture x86_64 - Error

问题描述

我正在尝试在Mac OS Catalina 10.15.2上的VSCode上运行代码.

I am trying to run a code on VSCode on Mac OS Catalina 10.15.2.

我在此功能上遇到此错误.

I am getting this Error on this function.

 $ g++ main.cpp
Undefined symbols for architecture x86_64:
 "nalea(int)", referenced from:_main in main-508a59.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see 
 invocation)   

这是我正在使用的主文件-

This is the main file I am using -

#include<iostream>
#include "proba.h"
#include "constantes.h"
#include "affichage.h"

int main(){
int a = nalea(60);
std::cout<<a;
//int a = InitAffichage();
return 0;
}

这是从中调用该函数的proba.cpp文件.

This is the proba.cpp file from where the function is called.

 #include <cstdlib>     // pour rand()
 #include <cstdio>      // pour fprintf()
 #include <cmath>       // pour floor()
 #include "proba.h"     // types et déclaration des fonctions


   int nalea( int max)
  {

       return (int)floor(rand()*((float)max)/RAND_MAX );
   }

这是proba.h头文件

This is proba.h header file

     int nalea(int max);

请帮助我，我是C ++的新手....

Please help me, I am new to C++....

推荐答案

我已经多次遇到这种情况，并且在大多数情况下，这与您的路径中的空格有关.

I have encountered this multiple times, and in most cases it is related to spaces in you path.

您可以做的简单测试是将您的项目放在一个文件夹中，该文件夹的路径中没有空格，例如您的用户主目录.

The simple test you can make is to put your project in a folder without spaces in its path e.g. your user home directory.

要对其进行修复，以便可以将项目放置在任何文件夹中，需要首先制作一个带有构建信息的task.json文件，然后根据vscode

To fix it so you can have the project in any folder, you need to first make a tasks.json file with the build information and compile all *.cpp according to the guide from vscode https://code.visualstudio.com/docs/cpp/config-clang-mac

1. 打开您的main.cpp
2. 转到菜单终端"，选择配置默认构建任务"

3. 选择"C/C ++:clang ++构建活动文件".您应该获得一个具有以下信息的task.json文件

1. Open your main.cpp
2. Go to the menu "Terminal", select "Configure Default Build Task"

3. Select "C/C++: clang++ build active file". You should get a tasks.json file with the following information

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "shell",
            "label": "C/C++: clang++ build active file",
            "command": "/usr/bin/clang++",
            "args": [
                "-g",
                "${file}",
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}"
            ],
            "options": {
                "cwd": "/usr/bin"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}

现在关键的部分是您应该将"$ {file}"，更改为"\" $ {workspaceFolder} \"/*.cpp"，.请注意两个 \"，这将确保处理路径中的任何空格，这在前面链接的vscode指南中未提及

Now the critical part is that you should change "${file}", to "\"${workspaceFolder}\"/*.cpp",. Take note of the two \", which will make sure to handle any spaces in your path, this is not mention in the vscode guide linked earlier

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