[R] Fortran DLL

[Roger Bivand]

On Fri, 23 May 2003, Alex Randriamiharisoa wrote:

> Dear R-users,
> After the reading of "Writing R extensions", "readme.packages", "Using 
> external compilers with
> R", ...,  I have tried to create a DLL for my Fortran file using the command:
> 
> g77 --shared -o robeth.dll robeth.f
> 
> and failed with several messages as :
> c:\temp/ccU8N5fb.o: ...  undefined reference to 'realpr_'
> c:\temp/ccU8N5fb.o: ...  undefined reference to 'dblepr_'
> c:\temp/ccU8N5fb.o: ...  undefined reference to 'intpr_'
> c:\temp/ccU8N5fb.o: ...  undefined reference to 'rexit_'
> 
> What I have missed. If I insert #include <R.h> at the top of the file, the 
> MinGW
> g77 compiler exits immediately =>  "undefined or invalid # directives"
> 

These are references to R.dll, which is not linked.

Perhaps try 

Rcmd SHLIB robeth.f

to use the build train that will link correctly. 

> I've tested on  R Version 1.5.1 and 1.7.0, for windows. If a special 
> library is needed,
> someone could send it to me by mail.
> Thanks for your help.
> Alex R.
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no