How to compile example OS code

[James Read]

Hi,

https://www.gnu.org/software/grub/manual/multiboot2/multiboot.html#Example-OS-code
contains example source code for an example OS that is multiboot compliant.
However, it lacks compilation instructions.

I'm guessing perhaps some form of cross compiler will be needed and some
special compilation flags to generate stand alone code.

Does anyone know how to compile this code?

James Read