Hello, We'd like to use the flag -std=c++0x to take advantage of features of the forthcoming C++0x standard that is already partly implemented by the GCC >= 4.3 R CMD check warns about the flag because it is non portable. Is there a way to turn the warning off, considering that we do test that the compiler is indeed GCC >= 4.3 as part of our configure script and we only add the flag in that case. Romain -- Romain Francois Professional R Enthusiast +33(0) 6 28 91 30 30 http://romainfrancois.blog.free.fr |- http://tr.im/KfKn : Rcpp 0.7.2 |- http://tr.im/JOlc : External pointers with Rcpp `- http://tr.im/JFqa : R Journal, Volume 1/2, December 2009