FFI: calling Haskell from C++?
rich.neswold at gmail.com
Wed Sep 14 12:00:20 EDT 2005
On 9/14/05, Simon Peyton-Jones <simonpj at microsoft.com> wrote:
> There's been a bit of traffic about calling Haskell from C++ recently,
> and I know that calling C++ from Haskell is a frequently asked question.
> Would someone like to write up a description of how
> to successfully call out from Haskell to C++ and vice versa,
> using GHC?
> If you did, we'd gladly include the result in the user manual, and save
> others a lot of head scratching. Maybe there are simple things we could do
> to GHC to make the process simpler. But what it needs is someone who knows
> C++ well to write a coherent story. Please!
I'm flattered that you quoted my message, but I'm not familiar with the
foreign language interface; I started looking at Haskell only a few weeks
I was able to fix the first problem, since the name-mangler is always a
problem when mixing other languages with C++. The second error I may or may
not have got right. The other solution recommended that the C++ library be
linked which fixes the undefined exception handling symbols. I'm curious
what would happen if Haskell called down into C++ code and then an exception
Anyways, I think your suggestion is a good one and I would be willing to
answer any C++ questions that anyone has when writing such a document.
AIM : rnezzy
ICQ : 174908475
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