BLD: added libflame as a useable lapack library

Now libflame may be used as a LAPACK back-end.
libflame requires an external BLAS so one has to
also have this enabled.
Also added release notes for NPY_*_ORDER and libFLAME.

1 files changed, 32 insertions, 0 deletions

diff --git a/doc/release/1.17.0-notes.rst b/doc/release/1.17.0-notes.rst
index 71ad17673..c1972c805 100644
--- a/doc/release/1.17.0-notes.rst
+++ b/doc/release/1.17.0-notes.rst
@@ -90,6 +90,38 @@ C API changes
 New Features
 ============
 
+libFLAME
+--------
+Support for building NumPy with the libFLAME linear algebra package as the LAPACK,
+implementation, see
+`libFLAME <https://www.cs.utexas.edu/~flame/web/libFLAME.html>`_ for details.
+
+User-defined BLAS detection order
+---------------------------------
+``numpy.distutils`` now uses an environment variable, comma-separated and case
+insensitive, to determine the detection order for BLAS libraries.
+By default ``NPY_BLAS_ORDER=mkl,blis,openblas,atlas,accelerate,blas``.
+However, to force the use of OpenBLAS simply do::
+
+   NPY_BLAS_ORDER=openblas python setup.py build
+
+which forces the use of OpenBLAS.
+This may be helpful for users which have a MKL installation but wishes to try
+out different implementations.
+
+User-defined LAPACK detection order
+-----------------------------------
+``numpy.distutils`` now uses an environment variable, comma-separated and case
+insensitive, to determine the detection order for LAPAK libraries.
+By default ``NPY_BLAS_ORDER=mkl,openblas,flame,atlas,accelerate,lapack``.
+However, to force the use of OpenBLAS simply do::
+
+   NPY_LAPACK_ORDER=openblas python setup.py build
+
+which forces the use of OpenBLAS.
+This may be helpful for users which have a MKL installation but wishes to try
+out different implementations.
+
 ``np.ufunc.reduce`` and related functions now accept a ``where`` mask
 ---------------------------------------------------------------------
 ``np.ufunc.reduce``, ``np.sum``, ``np.prod``, ``np.min``, ``np.max`` all