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Re: [Haskell-cafe] FFI, C/C++ and undefined references

Subject: Re: [Haskell-cafe] FFI, C/C++ and undefined references
From: DNM
Date: Thu, 14 Jan 2010 12:39:57 -0800 PST
Nope. Ubuntu Linux (Intrepid Ibex).  I wish it were that simple.

--D.N.


Daniel Fischer-4 wrote:
> 
> Am Donnerstag 14 Januar 2010 20:42:42 schrieb DNM:
>> Which is weird, because 'srilm.o'/'srilm.h' are the files that define
>> the mysterious "undefined references".  I'll keep plugging away and
>> report back when (or whether) I make some progress.  In the meanwhile,
>> if anyone has a clue, I'm all ears.
>>
>> Best,
>> D.N.
> 
> Just an idea. Are you on windows?
> If so, then your foreign calls would probably have to be
> 
> foreign import stdcall "srilm.h whatever" ...
> 
> instead of 
> 
> foreign import ccall "..."
> 
>>
>> Malcolm Wallace wrote:
>> > However, if you are unsure of which Haskell packages are needed, it is
>> > wise to let ghc work out the dependencies for you, e.g. with
>> >      ghc --make Main.hs slirm.o
>> >
>> > It cannot work out the C/C++ dependencies though, so every time you
>> > get "undefined reference" linking errors, you must discover which C
>> > code provides those symbols, and add its object file to the
>> > commandline by hand.
> 
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