Release D 2.078.1

[Martin Nowak]

On 02/01/2018 05:16 PM, Atila Neves wrote:
> It'd probably be easier to `executeShell("vcvarsall.bat")` than trying
> to replicate the logic in dmd itself. It's bound to get it wrong (as it
> has) and we don't have Microsoft's resources to test backwards
> compatibility.

That was my first suggestion as well, it's just to darn slow to call
though. Executing vcvarsall.bat takes 2+ seconds just to setup the env
variables, so we have to replicate what it does ourselves.

Maybe it's worth revisiting to figure out what takes so much time.

-Martin