On 25 August 2015 at 17:39, Avraham Adler wrote: | I've been testing a GCC 4.9.2-based toolchain for Windows for the last | week or so, and today fell afoul of the error uncovered here | <https://stat.ethz.ch/pipermail/r-devel/2015-March/070814.html>. I've | been passing different optimization flags, and Rcpp compiled properly | under every one EXCEPT when a -march (ivybridge) flag was passed | without an optimization flag. In that case, I received the | "collect2.exe: error: ld returned 5 exit status" error as discussed on | R-devel. Passing a -mtune flag without an -O flag did not cause an | error. | | Downloading the Rcpp source code and manually adding -O2 to Rcpp's | Makevars.win, re-tar/gzipping it and installing the local version | allowed Rcpp to compile properly. | | I don't know if it is better to tell people to change their local | Makevars under HOME/.R to pass -O2 or -O3 (that would probably be a | call by you, Dirk, as you would know best if O3 would help or hinder), | or if it is better to have Rcpp enforce it, but it should be noted | somewhere once a 4.9.2-based Windows is eventually released.
CRAN disallows non-portable flags such as -march. So yes, ~/.R/Makevars it is. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
