[Rcpp-devel] Recommended procedure to depend on Rcpp

[Romain Francois]

Dear package maintainers and members of the Rcpp-devel mailing list,

Following the discussion that was trigerred by the (most welcome) 
release of RSNNS, the cran maintainers have advised us about what they 
consider the best way for a package to declare it depends on Rcpp.

The documentation will be updated before the next Rcpp release, but here 
are the main points.

- In the DESCRIPTION file, you need at least these two lines:

Depends: Rcpp
LinkingTo: Rcpp



- In the Makevars file, you need this line:

PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`

So no requirement on GNU make is needed as the use of backticks 
supported to be portable.



- In the Makevars.win (where we can assume GNU make), you need this line:

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


  The documentation will include as usual the alternative version that 
uses configure and configure.win files.



Those advices are from the CRAN maintainers, and we are very thankful.

Please update your packages to implement this, there is no need to wait 
for another release of Rcpp, and it will only take a few minutes. There 
are for example a few packages that are still not using LinkingTo: Rcpp
(bifactorial, cxxPack, mvabund, phylobase, sdcTable, pcaMethods)



Best regards,

Romain


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Romain Francois
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