ATLAS (Automatically Tuned Linear Algebra Software) is an  ongoing
research effort focusing on applying empirical techniques in order to
provide portable performance. At present, it provides C and Fortran77
interfaces to a portably efficient BLAS implementation, as well as a few
routines from LAPACK.

This requires blas, and it conflicts with cblas (only one of atlas 
and cblas may be installed at any given time).  Take care with LAPACK 
(see notes 3 & 4 in README.SLACKWARE).

You need to read over README.SLACKWARE *before* building this.