Re: [Rd] Utilizing the internet module

From: Prof Brian Ripley <>
Date: Fri 24 Feb 2006 - 08:49:43 GMT

On Thu, 23 Feb 2006, Prof Brian Ripley wrote:

> On Thu, 23 Feb 2006, Jeffrey Horner wrote:
>> Hello all,
>> I'd like to utilize the R_Sock* functions from R_ext/R-ftp-http.h in my
>> R package. The intent is to use these in conjunction with R_serialize()
>> to store R objects in a remote data store. I'm aware that version
>> 2.2.1 of "Writing R extensions" explains that these may be undocumented
>> and unstable, but I have a couple of questions:
>> 1) are they platform independent? I presume they are...
> Only in sense that they have a common interface.
>> 2) What's the appropriate way to link against them? On Linux x86, I can
>> do this with the Makevars:
> You can, but that is a module and not a library and so it does not work on
> MacOS X and may well not work on Windows (you would be lucky prior to R
> 2.3.0).

It also does not work in R-devel on any system that supports visibility attributes, for example Linux systems with gcc4, and some RedHat systems with gcc 3.4.4. I am removing the declarations from R_exts/R-ftp-http.c for R 2.3.0.

Brian D. Ripley,        
Professor of Applied Statistics,
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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