Re: RXLisp

There is a new version of the package (0.3-1) on the Omegahat web site
(http://www.omegahat.org/RXLisp) and it allows R to be embedded in an
an XLisp-Stat session.  So now you have the XLisp syntax, etc.  and
the R functionality hidden beneath it.

This also allows R to call back into XLisp. For that reason, the
approach of including the .o's from the xlispstat directory directly
into the shared library that R loads will probably lead to some
complications.  Specifically, you will probably have two copies of the
variables in the C code and only one of them will be initialized.  And
potentially, routines in one set of code may access the uninitialized
variables!

I think we need to find the correct linker flags to get all this
working on the Mac. I am pretty certain that the OS X linker and
loader are up to the job at hand. We just need to coax the necessary
information from deep in the documentation.

 D.


Jan de Leeuw wrote:
> As you know, I wrap the foo.o files from the XLISP-STAT compile
> in an archive libxlisp.a and use that in the link of RXLisp.so.
> Seems to work. I guess it produces a bigger RXLisp.so, but
> are there other problems with it ?
> 
> Also, in the other direction, will you use the usual XLISP-STAT
> foreign code interface to load a comparable bundle R.so into
> XLISP-STAT ? Which then may have to use a comparable static
> libR.a.
> 
> Finally, the duplicate symbols. Both R.bin, which is used as the
> bundle-loader, and libxlisp.a have a _main, for instance. I force
> the linker to use the first one, whichever one that is. Could this
> give problems down the road ?
> ===
> Jan de Leeuw; Professor and Chair, UCLA Department of Statistics;
> US mail: 9432 Boelter Hall, Box 951554, Los Angeles, CA 90095-1554
> phone (310)-825-9550;  fax (310)-206-5658;  email: [email protected]
> homepage: http://gifi.stat.ucla.edu
>    
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