如何使用Visual Studio代码编译多cpp文件? [英] How to use visual studio code to compile multi-cpp file?

问题描述

我已经按照一些说明来构建Visual Studio代码C/C ++编译和调试环境.但是g ++编译器只能编译所选的cpp文件，因此无法编译与cpp文件关联的.h文件.然后终端显示体系结构x86_64的未定义符号"错误.代码如下:

I have followed some instructions to construct Visual studio code C/C++ compile and debug environment.But g++ compiler can only compile the selected cpp file, so the included .h file associated the cpp file can not compiled. then the terminal shows 'Undefined symbols for architecture x86_64' error. the code as below:

    int func();

a.cpp文件

    include <iostream>
    include "a.h"
    using namespace std;
    int func(){
        return 111;
    }

main.cpp文件

    include "a.h"
    using namespace std;
    int main()
    {
        int b = func();
        cout << b << endl;
    }

Visual Studio代码将使用以下命令

Visual studio code will use the command as below

     g++ directory/main.cpp -o directory/main.out -g -Wall -fcolor-        diagnostics -std=c++11

此命令将引发体系结构x86_64的未定义符号"错误 我可以使用此新命令来修复它

this command will raise 'Undefined symbols for architecture x86_64' error I can fix it with this new command

    g++ main.cpp a.cpp -o main.out.

所以问题是如何配置这些json文件来解决g ++编译问题.而且，当我想使用FFMpeg之类的库时，如何正确链接FFMpeg .h文件.

So the problem is how to config these json files to fix the g++ compile issue. And when I want to use some libraries such as FFMpeg, how can I link the FFMpeg .h file correctly.

推荐答案

对于非常简单的项目，您可以简单地通过单个命令将多个cpp文件传递给编译器，例如:

For very simple projects you can simply pass multiple cpp files to the compiler in a single command, e.g:

g++ main.cpp a.cpp -o main.out

您可以简单地将task.json中的编译命令更改为该值.

You can simply change your compile command in tasks.json to this value.

但是随着项目的发展，您会发现这种方法会给您带来越来越多的问题.我建议您研究一个合适的构建系统，其中包括很多选择:

However as your project grows you will find this approach causes you more and more problems. I'd recommend you look into a proper build system, there are many to choose from including:

• Make-Linux上的主要标准构建系统，但学习和学习都很困难
• CMake-Visual Studio代码对cmake有所支持
• Gyp-可以生成制作文件
• Scons-类似python的构建脚本

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