[Haskell-cafe] compilation succeeds -- execution fails

Stefan O'Rear stefanor at cox.net
Sat Mar 29 12:41:58 EDT 2008

On Fri, Mar 28, 2008 at 11:33:52AM -0700, Jason Dusek wrote:
> Thomas Schilling <nominolo at googlemail.com> wrote:
> > Did you try removing all .hi and .o files?
>   Yes. I tried it again this morning, and I've got the same
>   error -- same unknown symbol, &c.
>   I don't have trouble with most Haskell programs on my Mac, so
>   I assume it's the way I'm connecting to C that is the problem.
>   I've pasted in the relevant code below my signature -- it
>   seems plain enough to me, but I've not done much with foreign
>   declarations.
>   The `Ptr Char` declarations, for example, point to things
>   which are actually C ints -- they are all valid Unicode code
>   points, so I figure there's no harm done.

The only type that you are allowed to assume corresponds to a C int is
CInt, in the Foreign.C.Types module.  This probably isn't the problem,
but it could make problems of its own on a 64-bit or otherwise weird

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