[R] Fortran level mismatch between package and R

Hesen Peng hesen.peng at gmail.com
Fri Jan 18 23:57:02 CET 2008


I recompiled R using gfortran in my personal laptop. But I think it
may help if you build an agent C program which calls the FORTRAN
program, and then call the C program from R.

I'm also curious on how to solve this problem without too much work.
Please let me know if you find a good solution.

On Jan 19, 2008 12:58 AM, Steve Simmons <scs at umich.edu> wrote:
> We have a user here who is attempting to compile a package which
> requires f90 (gfortran will do). Our version of R was built with f77
> (g77). When the user attempts to build the package, f77 is always
> invoked and fails due to the presence of f90 features.
> Is there a simple method or some documentation on how to force a
> package build to use a different compiler than the one used in
> building R? If so, are opening ourselves up to any problems? In
> particular, we're concerned about API mismatches and fortran library
> mismatches, but there may be other problems we've not considered.
> We're using R 2.4.1, linux 2.6/x64, gcc/gfortran 4.0.
> To pre-answer some possible questions/suggestions -
> Doing a full conversion of our R installation is almost certainly not
> feasible; we also have legacy packages in place which don't build
> with f90/f95.
> Yes, we've thought of installing R built with gfortran and retaining
> the old with f77; that's probably our first fallback. Unfortunately
> that shuts legac package users from R improvements and will shut them
> out from packages which start require R2.6 and up features. We do
> *not* wish to run a f77 version of R2.6 and a f95 version of R2.6.
> That's probably our last fallback.
> Neither Suleman nor I are on the r-help mailing lists; please try to
> cc us on responses. We'll use the maillist archives to try and catch
> the responses which don't do that.
> Advance thanks,
> Steve Simmons
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Hesen Peng

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