GHCJS now runs Template Haskell on node.js - Any interest in out of process TH for general cross compilation?

Luite Stegeman stegeman at
Fri Jul 4 11:03:35 UTC 2014

On Thu, Jul 3, 2014 at 6:18 PM, Simon Peyton Jones <simonpj at>

>  Luite
> I lack the bandwidth to respond at any technical depth, but I’d like to
> make encouraging noises.  If you can figure out a way to make GHC do these
> things without making the compiler terribly complicated and making
> maintaining it harder, then I’m open to your proposals.
I think most of the communication code could go into a separate executable
that can be built by the user for the target-specific communication. The
GHC API facing part of the implementation in GHCJS is under 300 lines and
that includes some non-exported code duplicated from GHC, so I'm reasonably
optimistic that it can be done without too much impact.

Unfortunately I won't have much time in the near future, since a GHCJS
release is well overdue (mostly because I keep adding features like
this...) and I want to focus on that first, but getting it ready before
7.10 should be doable (especially if other people want to help!)

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