interfacing FORTRAN/OCAML??

interfacing FORTRAN/OCAML??

[karine CHEVALIER-JABET]

Hello,

I would like to know if interfacing FORTRAN with OCAML is possible(OCAML
calling FORTRAN) ; I read it for C, but didn t see for Fortran. Does it
mean I shoud call fortran with C then C with OCAML?

I guess this is a FAQ...
Thank you

Karine Chevalier-Jabet

Re: interfacing FORTRAN/OCAML??

[Xavier Leroy]

> I would like to know if interfacing FORTRAN with OCAML is possible(OCAML
> calling FORTRAN) ; I read it for C, but didn t see for Fortran. Does it
> mean I shoud call fortran with C then C with OCAML?

Yes, that's the basic idea.  Most Fortran compilers (except perhaps
some Fortran 9x stuff) have a pretty straightforward interface with C,
so it's not as bad as it sounds.

Several of your colleagues at CEA have significant experience on
interfacing Fortran libraries with Caml code.  You can look on the
archives of the Caml mailing list
(http://caml.inria.fr/bin/msearch/caml-list) for previous discussions
on this topic.

All the best,

- Xavier Leroy

Re: interfacing FORTRAN/OCAML??

[Patrick Goldbronn - SYSCO]

 karine CHEVALIER-JABET wrote:
 >
 > Hello,
 >
 > I would like to know if interfacing FORTRAN with OCAML is
possible(OCAML
 > calling FORTRAN) ; I read it for C, but didn t see for Fortran. Does
it
 > mean I shoud call fortran with C then C with OCAML?
 >
 > I guess this is a FAQ...
 > Thank you
 >
 > Karine Chevalier-Jabet
 
 In fact it is quite the same : you must interfacing C and fortran (it
 compiler dependent, for the name of function). You should read the
 compiler user guide (SUN is good for interfacing C and fortran)
 
 You can go in http://caml.inria.fr/hump.html#ffi (ocaml fortran
 interface)
 
 I know INRIA works on an libraries which allow facilities to use big
 array outside the heap (if you have such trouble).
 
 For instance I have wrote a litle interface between C and fortran
array.
 If you are interested, I can send it to you.
 
 
 Bests Regards
 
 --
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interfacing FORTRAN/OCAML??

[William Chesters]

karine CHEVALIER-JABET writes:
 > Hello,
 > 
 > I would like to know if interfacing FORTRAN with OCAML is possible(OCAML
 > calling FORTRAN)

One issue that comes up if you are running on a 32-bit RISC machine is
alignment of doubles (8-byte floats): if you link against code which
has been compiled to assume that they are all 8-byte aligned, and use
it directly on ocaml float arrays, you get bus errors because ocaml
(on 32-bit machines) only aligns to 4-byte boundaries.  I have a patch
for ocaml which makes it align doubles on 8-byte boundaries.