chess-engine | free chess engine library built to run | Game Engine library

I'm trying to make a chess engine.

My Problem: I am writing a chess engine in C++. Part of writing a chess engine is dealing with very large numbers (conceivably up to 2^63). I have a file that is running unit tests for my project, and when I try to run the build task to compile it to an executable, I am getting the following error:

I have a c++ console app project in visual studio 2019. Compiled, it gives a command line engine.exe that sends output after user input and command execution and waits for another user input etc.

In fact engine.exe is a chess engine that complies to the UCI interface standard, which among others forces the engine to be a command line executable and which allows to use the engine in the Arena Chess GUI, hence the chess tag. (The c++ is because I coded the engine in c++ inside visual studio and because I guess that the answer will depend on visual studio c++ project settings.)

I can perfectely debug Engine.exe from the command prompt by inputing a first move, waiting for engines's response etc. You can do as you would debug the standard console hello world in visual studio, no problem.

Now I am much more interested to debug Engine.exe while using it from a chess GUI, namely Arena Chess GUI. But this does not work :

• In the properties of the project used to compile my engine I put (the path to) arena.exe in the command to execute when the debug is launched, and then, when debug is triggered and arena opened, I load in Arena a new engine corresponding to my engine, I put breakpoints in my code but each has a "no symbols loaded".

• I launch Arena, I load a new engine in it, the engine being the compiled debug version of my engine, and then in visual studio I make an "attach to process" and add Arena as process to attach to. Then the breakpoints in my code in visual studio have also "no symbols loaded".

I guess that the problem is that debugging a command line is impossible with visual studio outside of the windows cmd prompt, whereas you can debug a dll from any exe using it.

What is the standard way to proceed ?

Remark. I already posted my question on CSE here https://chess.stackexchange.com/questions/27911/debugging-my-chess-engine-through-the-arena-gui but finally think that it is more appropriate for SE as it formally does not depend on chess at all.