[R] Problem with Fortran 95 code in R

[Zhu Wang]

Dear helpers:

I am trying to call some Fortran 95 code with R-2.3.0 but had problem as 
below. Any pointers would be appreciated. Thanks, Zhu Wang

On Linux,
R CMD SHLIB rfh.f
R
> dyn.load("rfh.so")
Error in dyn.load(x, as.logical(local), as.logical(now)) :
       unable to load shared library '/home/zwang/rf/rfh.so':
 /home/zwang/rf/rfh.so: undefined symbol: _gfortran_allocate

On Unix,
R CMD SHLIB rfh.f
R
> dyn.load("rfh.so")
Error in dyn.load(x, as.logical(local), as.logical(now)) :
       unable to load shared library '/home/zwang/rf/rfh.so':
 ld.so.1: /usr/local/R-2.3.0/lib/R/bin/exec/R: fatal: relocation error: 
file /home/zwang/rf/rfh.so: symbol __f90_allocate2: referenced symbol 
not found