-----Original Message-----
From: r-devel-bounces at r-project.org
[mailto:r-devel-bounces at r-project.org] On Behalf Of Prof Brian Ripley
Sent: Sunday, December 09, 2007 1:05 PM
To: John Fox
Cc: r-devel at 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
packages? The Writing R Extensions manual still says that
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, ripley at stats.ox.ac.uk
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, UK Fax: +44 1865 272595