dyn.load a f90 module.

Dear list,

Has there been any success in loading modules written in f90? I tried

% ifort -c myfile.f90
% R CMD SHLIB myfile.o
% R
dyn.load('myfile.so')
.Fortran('myfile')

I used intel (free) fortran compiler under linux. All commands run
successfully except that function myfile is not loaded. (Is there a
function/tool to list symbols in a .so file?)