[Rcpp-devel] recommended way to use Rcpp in packages

[Romain Francois]

Dear package maintainers,

Some of your package fail to compile on windows 64 with the current 
versions of R and Rcpp.

It appears to be related to the Makevars.win. What to write in the 
Makevars.win file has changed over time as new advice have been given, 
etc ... so I wanted to send an email to advise what is the currently 
best way to do it.

We need two things :

- Rcpp headers : this is really easy, you just need to add the following 
line in your DESCRIPTION

LinkingTo: Rcpp

if you do this, you don't need the PKG_CPPFLAGS line in the Makevars and 
Makevars.win anymore. This is recommended as there appears to be 
problems with both backticks and the use of $shell


- linking against the library : on windows, you need to follow Brian 
Ripley's advice : http://article.gmane.org/gmane.comp.lang.r.devel/24449

and use this in your Makevars.win:

PKG_LIBS = $(shell "${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" -e 
"Rcpp:::LdFlags()")

(this might change again in the future and we will advise again)

Please consider registering to the Rcpp-devel mailing list if you wish 
to reply to this email. 
http://lists.r-forge.r-project.org/mailman/listinfo/rcpp-devel

Please read rhe "Rcpp-package" vignette for a more complete description 
of this.

Best Regards,

Romain

-- 
Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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