[Rcpp-devel] Using Rcpp in a package only as an option?
In most cases your package is going to be distributed as binary anyway, so CRAN compiled it, and CRAN compiled Rcpp, so there should be nothing to worry.
And even if you're not distributing from source, telling (windows) users to install rtools and then use install_github is not a big barrier. Hadley
Chief Scientist, RStudio http://had.co.nz/