Rcpp and default C++ compiler

Question

I have some strange troubles with Rcpp - it uses unpredictable C++ compiler. This question is somewhat similar to this question.
I\'m on OSX, I have 2 complilers - defau

Answer 1

I only read one line of your question and stopped there:

I have some strange troubles with Rcpp - it uses unpredictable C++ compiler

That is both wrong and also inflammatory. Please read the R documentation included with your version of R and learn how R sets these things.

Rcpp does nothing extra. All this is default R behaviour:

• As a user you can set this in ~/.R/Makevars

• As a package author aiming for portable and CRAN-compatible packages you cannot but have to use, say, configure at package built-time.

This is all documented and has been discussed before.

Answer 2

Thanks, to @Dirk hint, I finaly got an answer. Hope, this will save a little bit of time for somebody. Following two lines in ~/.R/Makevars solved my problem:

CXX1X=clang-omp++

See details in this Writing R Extensions section.