0.12.3

As usual, see

• https://github.com/RcppCore/Rcpp/blob/master/inst/NEWS.Rd
• https://github.com/RcppCore/Rcpp/blob/master/ChangeLog
• http://dirk.eddelbuettel.com/blog/2016/01/10#rcpp_0.12.3

for more details.

You can use the CRAN repo with the R package management tools for installation, and the RcppCore drat repo via drat::addRepo("RcppCore") to access pre-releases.