dyn.load(libname)
dyn.load links the specified shared library
to the executing R image. Calls to .C and .Fortran
can then be used to execute C functions or Fortran subroutines
contained in the library.
The creation of shared libraries the runtime linking
of them into executing programs is very platform
dependent. In recent years there has been some
simplification in the process because the C subroutine
call dlopen has become the standard for doing this
under Unix.
dyn.load uses the dlopen mechanism and
should work on all platforms which support it.