Mass-enabling D => License question

[via Digitalmars-d]

On Wednesday, 21 May 2014 at 07:50:33 UTC, Joakim wrote:
> I don't think John was talking about linking against dmd, merely
> having the user download and run it standalone, which the GPL
> doesn't prohibit.

You can modify a GPL'ed compiler to work as a stand alone server 
with shared memory interface. You are allowed to distribute it as 
a binary with other kinds of software. You don't have to make 
source available unless the receiver of the binary explicitly 
requests it, and only for the GPL'ed server.

GPL is based on copyright law (WIPO) in order to work under 
different jurisdictions, so it is fairly permissive.