[Haskell-cafe] hsffig and duplicate typedef declarations

Dean Herington heringtonlacey at mindspring.com
Thu May 14 01:10:40 EDT 2009

At 9:59 PM -0700 5/13/09, Don Stewart wrote:
>>  I have a large body of C/C++ code at work that I'd like to be able to 
>>  access from Haskell via FFI.  Because the interface to this code is 
>>  broad, hsffig would seem to be ideal for the task.
>>  I've run across one serious hitch, though.  The existing #include file
>>  graph is complicated and ends up declaring some typedefs multiple times
>>  (albeit in consistent ways).  While gcc (for example) rejects such
>>  practice, the Windows C compiler we're using accepts it. Does anyone know
>>  how feasible it would be to get hsffig to accept such practice as well? 
>>  I've started looking at the hsffig code (and discovered that the C
>>  grammar hsffig uses seems to get confused by duplicate typedefs), but
>>  thought I'd ask the list in parallel with my further study.
>Have you looked at c2hs? (I'm not sure how familiar people are with
>hsffig, but Dimitry Golubovsky can probably comment)
>-- Don

Yes, I started this journey with c2hs.  Then I moved to hsc2hs, which 
appeared to be a "standardized" version of the same approach.  But my 
interface consists of hundreds (maybe thousands) of #defines, 
structs, typedefs, etc., so I quickly tired of the boilerplate 
wrapping code, modest as it is.


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