[R] Creating shared libraries for dyn.load() in R

[Peter Bouman]

Dear R-users,

I am working to install Chong Gu's new gss library on my Linux system
(Redhat 5.1/i386), and have run into the following roadblock:  Dr. Gu's R
code is a front end for a package of Fortran routines called RKPACK.  While
I have no trouble compiling
the individual bits of Fortran code with fort77 in Linux, I don't know how
to link the resulting *.o files into a shared library that R
will read with dyn.load() (I am following the procedure recommended by V&R
in their R Complements to MASS).

I suspect, of course, that the problem is that I don't really understand how
to use ld to produce the shared libraries correctly.  Could anyone indulge a
newbie and offer some advice?  Even a pointer to documentation on how to
build shared libraries would be great.

(Alternatively:  Dr. Gu's Makefile for GKPACK uses "ranlib" to put the
object code into a *.a file.  Can R be persuaded to use this kind of file?)

Thanks,

Peter Bouman
Senior Analyst 
Sachs Group
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