Preparing portal / portal2

The default compilers on portal and portal2 are GCC 11. These are quite old, and don’t support all of the language features we need. The GCC 15 compilers are available however, so we can use those instead. To activate them, we need to do:

scl enable gcc-toolset-15 bash

This will create a new Bash shell with the environment variables set to point to this version of the compilers.

It is not recommended to add this command directly to our .bashrc, but we can instead create a shortcut, by adding:

gcc15() {
   scl enable gcc-toolset-15 bash
}

To the end of our .bashrc. Then we can just type:

gcc15

To setup the compilers (we need to do this each time we log into the machines).

Tip

You can check which version of the compilers are active by doing:

g++ --version