VSCode C++ compile with own header files

Question

How do I convince VSCode to compile my C++ program with my own header files? I just can't figure it out.

Minimal example with the following directory structure:

workdir/main.cpp
workdir/test.h
workdir/test.cpp

Content of the main.cpp :

#include <iostream>
#include "test.h"

int main()
{
    std::cout << "Hello world!" << std::endl;
    print_stuff();
}

Content of test.h :

#pragma once

void print_stuff(void);

Content of test.cpp :

#include <iostream>

void print_stuff()
{
    std::cout << "Stuff" << std::endl;
}

From the command line, compiling with g++ -o main.exe main.cpp --std=gnu++17 test.cpp works. Even VSCode's intellisense correctly finds the functions, but still can't compile.

I've tried modifying the includePath in the configurations.json , but so far without any success:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [],
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "gnu17",
            "cppStandard": "gnu++14",
            "intelliSenseMode": "linux-gcc-x64"
        }
    ],
    "version": 4
}

Answer 1

I found a solution, but the problem was twofold. This post helped: Why is Visual Studio Code ignoring my tasks.json file?

As @drescherjm pointed out, I had to modify my tasks.json to include all *.cpp files:

            "args": [
                "-O3",
                "${workspaceFolder}/backend/*.cpp",
                "-o",
                "${workspaceFolder}/backend/main.exe",
                "-std=gnu++17",
                "-fopenmp"
            ],

But there seems to be a bug in VSC that changes to the ´task.json´ are not considered right away. Everytime I changed something in the file, I had to restart VSC to take effect.