Need help deciphering posix.mak

[Dicebot via Digitalmars-d]

On Friday, 5 December 2014 at 10:48:15 UTC, Daniel Murphy wrote:
> As much as I dislike digital mars make, requiring GNU make on 
> windows would be worse.  One of these days I'm going to rewrite 
> the dmd test suite to not require make at all, but I'm going to 
> have to figure out how it works first.

How is it really different? Both require external tool, both are 
available via prebuilt windows binary. At least you can build GNU 
one yourself.