Dear Brian,
Thank you for this.
John
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Prof Brian Ripley
> Sent: Sunday, December 09, 2007 1:05 PM
> To: John Fox
> Cc: r-devel@r-project.org
> Subject: Re: [Rd] Using Fortran 95 in an R package?
>
> On Sun, 9 Dec 2007, John Fox wrote:
>
> > Dear R-devel list members,
> >
> > What's the best current advice about writing Fortran code
> for use in R
> > packages? The Writing R Extensions manual still says that
> the .Fortran
> > interface is primarily intended for FORTRAN 77 code. In particular,
> > are there portability issues if I use Fortran 95 in a package? For
> > example, I see that Rtools for Windows now include the
> gfortran compiler.
>
> Yes, there are still portability issues. We do still see
> quite a few people using gcc3/g77 (especially on older Linux
> and commercial Unices) and there are further issues if you
> make use of subprogram names containing underlines. We don't
> distribute a cross-building solution for Windows using
> gfortran (although one can be built, it will not be mature
> until gcc 4.3.x is out).
>
> However, I would not let that deter you: just use .f95
> extensions on the Fortran 95 files and avoid underlines. For
> Windows users you are effectively requiring R >= 2.6.0.
>
> Brian
>
> --
> Brian D. Ripley, [EMAIL PROTECTED]
> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
> University of Oxford, Tel: +44 1865 272861 (self)
> 1 South Parks Road, +44 1865 272866 (PA)
> Oxford OX1 3TG, UKFax: +44 1865 272595
>
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