C++ with Rcpp on R script [closed]

Question

Someone had this type of error when is using Rcpp lib for decomposition into eigenvalues ​​and eigenvectors. If yes, how could I fix it? Thanks!

This is the code:

cppFunction('
Rcpp::List eigen_decomp_cpp(const arma::mat& A) {
   arma::vec eigval;
   arma::mat eigvec;
   arma::eig_sym(eigval, eigvec, A);
return Rcpp::List::create(Rcpp::Named("values") = eigval,
                          Rcpp::Named("vectors") = eigvec);
}', depends = "RcppArmadillo")    

This is the error:

Error in sourceCpp(code = code, env = env, rebuild = rebuild, 
cacheDir = cacheDir,  : 
Error 1 occurred building shared library.    

Now I'm reading the literature of this lib to understand the correct syntax, because I checked if there are invalid characters, Rtools is installed a restarted the RStudio.