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, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel