[Rcpp-devel] basic usage help

Vinh Nguyen vinhdizzo at gmail.com
Thu May 27 17:05:19 CEST 2010

On Wed, May 26, 2010 at 11:33 PM, Romain Francois
<romain at r-enthusiasts.com> wrote:
> You don't have to, but it makes your life easier. Now that we use LinkingTo:
> Rcpp, RcppArmadillo it makes our Makevars smaller and more robust. R figures
> out on its own where to find Rcpp and RcppArmadillo include paths.
> If you don't want to use what R and Rcpp provides for you, you can emulate
> this by using this Makevars :
> PKG_LIBS = $(shell $(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()" )
> PKG_CXXFLAGS = $(shell $(R_HOME)/bin/Rscript -e "Rcpp:::CxxFlags()" )
> $(shell Rscript -e "cat( '-I', system.file('include', package =
> 'RcppArmadillo'), sep = '' )" )
> The PKG_LIBS line is the same that the one that gets generated  by
> RcppArmadillo.package.skeleton.
> The PKG_CXXFLAGS line pulls in the include path of Rcpp and RcppArmadillo.
> Just save this as a "Makevars" in the directory where your cpp files are,
> and run:
> R CMD SHLIB *cpp -o mylib.so
> I will add a RcppArmadillo:::CxxFlags() for consistency between Rcpp and
> RcppArmadillo.
> Romain

Thanks Romain.  This is what I'm used to while working with compiled code for R.

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