[Rcpp-devel] Question on 5.6 Interfacing C++ code

[Sean Robert McGuffee]

I don't know!
I'm trying to learn how to set something like a package up to allow others
to access my C++ code inside of R. I'm dense about how to do this and about
what emails list names are.
Sean


On 4/20/11 10:18 AM, "Dirk Eddelbuettel" <edd at debian.org> wrote:

> 
> Hi Sean,
> 
> Steve had the right hunch:  Is this a question for
> 
>     r-devel,        ie R in general, or for
> 
>     rcpp-devel,  ie R with Rcpp  ?
> 
> 
> On 20 April 2011 at 09:49, Sean Robert McGuffee wrote:
> | Hi, I have a quick couple of questions about some of the documentation on
> the
> | web page:
> | http://cran.r-project.org/doc/manuals/R-exts.html#
> | Linking-GUIs-and-other-front_002dends-to-R
> | under the heading:
> | 5.6 Interfacing C++ code
> | 
> | Question 1:
> | If I?m at a terminal, I can type the instructions they suggest:
> | R CMD SHLIB X.cc X_main.cc
> | If I wanted a package to do this, how would I tell the package to do that
> same
> | thing?
> 
> Place the source files into the top-level directory src/ of the package.
> 
> | Would I use the same command and just include it in a file somewhere in the
> | package?
> | If so, which file?
> 
> 'R CMD build' and 'R CMD INSTALL' and ... all take care of it.
>  
> | Question 2:
> | dyn.load(paste("X", .Platform$dynlib.ext, sep = ""))
> | 
> | Where does .Platform$dynlib.ext come from?
> | What does it mean?
> 
> R knows that that Windoze uses .dll and .a, Linux uses .so and .a, OS X uses
> .dynlib.  It swaps the correct extension based on the OS it is being run on.
> 
> | What do it?s components .Platform and $dynlib and .ext mean?
> 
> Maybe the help file for .Platform is of interest?
> 
> I think you are being somewhat off-topic here and abusing the high
> signal-to-noise ration of this list.  The r-devel is list of very high
> quality too and has a wider readership, so maybe you should post non-Rcpp
> questions there?
> 
> I also find learning by example instructive. There are 2946 packages on
> CRAN, of which 980 contain a src/ directory.  That makes for 980 examples you
> could look at---some are small, some are big, some use C, some use C++, ...
> You should be able to find a few close to what you currently attempt to do.
> 
> And we would be happy to take actual Rcpp questions here.
> 
> Cheers, Dirk