Instructions for setting up a cross complier on Mac?

Can anyone point me at some good instructions for setting up a cross compiler / drobo dev env on my Mac? Or will I need a Linux box?

I would also appreciate details on this.

Running a Drobo FS distrib on a vmware fusion image could be a solution? Any advise and preparing the setup?

Hoping to get a answer to help me getting started,
warm regards,

For anyone else looking for a guide, Ricardo has posted a good series here about using virtualbox (free on Mac/Windows/Linux):


By the time you read this, he probably has more.