[R] I/O fortran instructions and dyn.load

[Prof Brian Ripley]

Try

R CMD SHLIB test.f

If SHLIB know it has to deal with Fortran code, it adds the appropriate 
libraries.

On Wed, 26 May 2004, Gilles GUILLOT wrote:

> I have the following Fortran code
> 
> subroutine sub(path)
> character*100 path
> open(10,file=path)
> end
> 
> saved as test.f
> 
> which I compile with
> g77 -c test.f
> 
> then I make the shared libary in R (Version 1.9.0) with
> system("R CMD SHLIB test.o")
> 
> so far, everything OK.
> 
> But
> dyn.load("test.so")
> returns the following error message:
> Error in dyn.load(x, as.logical(local), as.logical(now)) :
>         unable to load shared library "test.so":
>   test.so: undefined symbol: f_open
> 
> I get similar error messages with r/w Fortran instructions like 
> write(*,*) , read(*,*)
> 
> I used to use such programs on my computer under mandrake linux 10.
> The problem reported occurs on a new server operating under 
> another linux distrib (debian).
> 
> Thanks in advance for any help, 
> Gilles 
> 

-- 
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