Dave Roberts wrote: > I have been revising some FORTRAN 77 routines in R packages I have > previously submitted. Since R is now using gfortan I experimented with > some Fortran 90 code (array intrinsics primarily). So far the code is > still in F77 fixed format, in files suffixed .f (not .f90), but > incorporates some F90 constructs. It has worked fine in linux/R. I > tried to follow the thread of previous discussions on this subject, but > as fast as things are changing, it was somewhat dated, and not too > definitive. > > I don't so my own Windows versions of packages, but rather rely on CRAN > to do the conversions, and I don't want to send them code that won't > work on Windows. Does anybody have extensive experience on what > elements of F90 can be used in R packages for Windows? If R CMD SHLIB > is happy with it, is it likely to work? > > Thanks, Dave > The Windows toolkit is also GCC, hence gfortran for new enough R. The thing to worry about is the "other" category of machines. Either oldish/specialized Unixes which ship with their own toolchains and optimized libraries, or commercial compilers like the ones from Intel. Brian Ripley and/or http://cran.r-project.org/doc/manuals/R-exts.html can fill you in on the details. See also Brian's reply to John Fox on December 9 ("I wouldn't let that deter you.").
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