[R] registration of C routines

[Setzer.Woodrow@epamail.epa.gov]

Almost at the end of the News for R-1.3.0 is the following section:

o   New mechanism for explicitly registering native routines in a
     DLL/shared library accessible via .C(), .Call(), .Fortran() and
     .External().  This is potentially more robust than the existing
     dynamic lookup, since it checks the number of arguments, type of
     the routine.

How do I learn how to use this mechanism?  Also, is there a sanctioned way
to find and use, in C-code loaded via dyn.load and executed using one of
the calls .C(), etc., functions defined in a separate DLL/shared library
and also loaded with dyn.load?

R. Woodrow Setzer, Jr.                                            Phone:
(919) 541-0128
Experimental Toxicology Division                       Fax:  (919) 541-5394
Pharmacokinetics Branch
NHEERL MD-74; US EPA; RTP, NC 27711

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