LAPACK provides routines for solving systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalue problems, and singular value problems. xblas is an optional dependency. To build a static library in addition to the shared library, pass STATIC=yes to the script. Note: If you want good performance, then use the BLAS libraries provided by your CPU vendor, or OpenBLAS or atlas provided by SlackBuilds.org.