I figured out a better forum would be the org mode mailing list, so I sent
the patch there and got merged.

https://orgmode.org/list/877dx0cwhz.fsf@nicolasgoaziou.fr/

On Wed, Sep 30, 2020 at 5:35 AM Lars Ingebrigtsen <larsi@gnus.org> wrote:

> Roland Coeurjoly <rolandcoeurjoly@gmail.com> writes:
>
> > Haskell code can be both compiled (for example with ghc), or interpreted
> (with
> > ghci).
> >
> > Until now, org babel had only support for interpretation.
> >
> > Haskell is weird in that some code for the interpreter cannot be
> > compiled and viceversa.  For example, in ghci (the interpreter) you
> > are required to use let to declare functions.
> >
> > In this patch I add support for compilation with the header argument
> > :compile yes.  The function to compile haskell is almost a copy paste
> > of the C funcion in ob-C.el.
> >
> > By default I retain the original behavior, i.e. interpreting the block.
> >
> > I have tested this patch in emacs-27.0.91.
> >
> > It is my first patch to GNU Emacs and I am a newbie with both elisp
> > and haskell.
>
> There was unfortunately no response to this patch at the time (in April
> this year), because, I guess, not that many people have knowledge of
> both Org and Haskell.  :-/  Me included.
>
> The code looks reasonable to me, but I have no way of testing.
>
> I'm not quite sure who I should direct attention to this patch -- Eric
> Schulte, who wrote ob-haskell, doesn't seem to have contributed in a
> decade...
>
> --
> (domestic pets only, the antidote for overdose, milk.)
>    bloggy blog: http://lars.ingebrigtsen.no
>