Debug multiple C++ files "undefined reference" 路 Issue #6546 路 microsoft/vscode

The problem you have is that your tasks.json is not configured to build file.cpp.

I suggest that you use make in order to build multiple file projects.

For instance, in your case, I would suggest to have a tasks.json thus:

{ "label": "command": "make", "args": [ "CONF=Debug", "-C", "./.vscode" ] ...other stuff. }

What the above does is that it looks for Makefile in directory ./vscode and executes it. Your actual Makefile is going to have commands like g++ -g -o and such.

There are many tutorials on how to create makefiles. I would suggest that on linux, take the help of an ide (such as Netbeans) to create and compile this project. Then, within Netbeans project folder, you will be able to find sample Makefile-Debug.mk and Makefile-Release.mk files.

Then, what you need to do is to simply copy over those makefiles into your ./.vscode/ folder. That way, your build task in tasks.json will simply call make.