Minimum OS required to build GCC

[tom <tompotts@xxxxxxxxxxxxxxxxxxxxxx>]

This may be a bit of a daft question but I'm wondering what the minimum 
requirements for an OS to run GCC:
I'm getting a parallella board and it seems sort of logical to try and 
use it to do compiles as well. I used to run GCC on a 4MByte 386 so it 
seems feasible.
Tom