Error when multiplying matrices with armadillo library (CodeBlocks)
<p>Am  trying to multiply two small matrices but i cant get the code to compile </p>

<pre><code>#include &lt;iostream&gt;
#include &lt;armadillo&gt;


using namespace std;
using namespace arma;



int main()
{


mat A1(1,2) ;
A1.ones();
mat Theta1(6,1);
Theta1.randn();
mat tool = trans(Theta1);
mat z1= tool*A1;
//cout&lt;&lt;z1&lt;&lt;endl;
cout&lt;&lt;Theta1&lt;&lt;endl;
}
</code></pre>

<p>I get the following errors </p>

<p>||=== Build: Debug in tutorialpp (compiler: GNU GCC Compiler) ===|
obj\Debug\main.o||In function <code>ZN4arma4blas4gemvIdEEvPKcPKiS5_PKT_S8_S5_S8_S5_S8_PS6_S5_':|
D:\Downloads\armadillo-7.200.1b\armadillo-7.200.1b\include\armadillo_bits\wrapper_blas.hpp|36|undefined reference to</code>wrapper_dgemv_'|
obj\Debug\main.o||In function <code>ZN4arma4blas4gemmIdEEvPKcS3_PKiS5_S5_PKT_S8_S5_S8_S5_S8_PS6_S5_':|
D:\Downloads\armadillo-7.200.1b\armadillo-7.200.1b\include\armadillo_bits\wrapper_blas.hpp|71|undefined reference to</code>wrapper_dgemm_'|
||error: ld returned 1 exit status|
||=== Build failed: 3 error(s), 0 warning(s) (0 minute(s), 6 second(s)) ===|</p>

<p>Please guide me so i can fix this , thanks </p>