[Rcpp-devel] pass an arma::mat& to a exported function in a package

riadh zaatour zaatour_riadh at yahoo.fr
Wed Dec 11 19:53:34 CET 2013

I have a code looking like this :

#include <RcppArmadillo.h>
// [[Rcpp::depends(RcppArmadillo)]]
using namespace Rcpp;

// [[Rcpp::export]]
void func1(arma::mat& a) {
this compiles and executes fine when used with sourceCpp().

Then I include this code in a package, I call compileAttributes(), then I build and install my package and all that works fine.
Then, in R :
does not work and I receive the message
Error in .Call("pkgname_func1", PACKAGE = "pkgname", a,  :  "pkgname_func1" not available for .Call() for package "pkgname"

If I put SEXP instead of arma::mat& as a parameter type in the exported function, all work fine.

Have I missed something for that to work with sourceCpp() and fail when within a package?

Thanks a lot
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