G++ on MacOS

How to access <bits/stdc++.h> and <ext/pb_ds> easily

2025/05/08 , tutorialc++

The problem

MacOS have a special compiler for C/C++ which is clang, you would like to use G++.

The problem is when you run:

g++ --version

You will see it’s Clang.

Fixing

You need to put a g++ program in a path earlier than /usr/bin, you can check it by:

echo $PATH

Usually /usr/local/bin should be earlier than /usr/bin, so you can copy g++-14 from homebrew to it like this:

brew install gcc
mkdir /usr/local/bin
sudo ln -s /opt/homebrew/bin/g++-14 /usr/local/bin/g++