Basic Linear Algebra Subroutines 3, shared library This package is a binary incompatible upgrade to the blas package. Several minor changes to the C interface have been incorporated. One can maintain both versions on a system simultaneously to aid in the transition. BLAS (Basic Linear Algebra Subroutines) is a set of efficient routines for most of the basic vector and matrix operations. They are widely used as the basis for other high quality linear algebra software, for example lapack and linpack. This implementation is the Fortran 77 reference implementation found at netlib. This package contains a shared version of the library.