Errors compiling code with armadillo and GNU emacs

/tmp/ccALHjhs.o: En la función `TLS wrapper function for arma::arma_rng_cxx11_instance':
inversa.cpp:(.text._ZTWN4arma23arma_rng_cxx11_instanceE[_ZTWN4arma23arma_rng_cxx11_instanceE]+0x21): referencia a `arma::arma_rng_cxx11_instance' sin definir
collect2: error: ld returned 1 exit status

I install armadillo with all requeriments but it don't work.

Help. I have a error when I compile this code:

#include <iostream>
#include <armadillo>
using namespace std;
using namespace arma;
int main(int argc, char** argv)
{
mat A(4, 5, fill::randu);
mat B(4, 5, fill::randu);
cout << A * B.t() << endl;
return 0;
}

I don know how fixed it. Help please.