Should gdmd be included with gdc?

[kdevel]

On Tuesday, 24 May 2022 at 18:21:40 UTC, max haughton wrote:
[...]
>> I think the best route to go may be to just pick one and run 
>> with it, then push it into a dtools or gdctools directory on 
>> the gcc tree.
>
> One thing I'd like to note about gdmd (the version of it that I 
> have on my machine at least) is that it doesn't pass through 
> arguments it can't recognize (whereas ldmd2 does do this).
>
> Not passing them through is subtly really annoying.

For ldmd I augmented the command line with `-i=-ldc`. dmd accepts 
this -i switch. Into what GDC-option does it translate?