[Lapack] A Problem in working with LAPACK

[Tohid Alizadeh]

Dear committee,

I'm using code blocks for C++ programing. I've made use of Armadillo library 
and LAPACK in my program, and I think the installation of the libraries are Ok. 
But every time I use matrix operations like "inv()" or "det", I face with 
errors like "undefined reference to "dgetrf_" or "dgetri_" ".
Could you please help me on this?

Regards
Tohid