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6 changes: 3 additions & 3 deletions doc/source/building/blas_lapack.rst
Original file line number Diff line number Diff line change
Expand Up @@ -16,20 +16,20 @@ plain ``libblas``/``liblapack``. This may vary per platform or over releases.
That order, and which libraries are tried, can be changed through the
``blas-order`` and ``lapack-order`` build options, for example::

$ python -m pip install . -C-Dblas-order=openblas,mkl,blis -C-Dlapack-order=openblas,mkl,lapack
$ python -m pip install . -Csetup-args=-Dblas-order=openblas,mkl,blis -Csetup-args=-Dlapack-order=openblas,mkl,lapack

The first suitable library that is found will be used. In case no suitable
library is found, the NumPy build will print a warning and then use (slow!)
NumPy-internal fallback routines. In order to disallow use of those slow routines,
the ``allow-noblas`` build option can be used::

$ python -m pip install . -C-Dallow-noblas=false
$ python -m pip install . -Csetup-args=-Dallow-noblas=false

By default the LP64 (32-bit integer) interface to BLAS and LAPACK will be used.
For building against the ILP64 (64-bit integer) interface, one must use the
``use-ilp64`` build option::

$ python -m pip install . -C-Duse-ilp64=true
$ python -m pip install . -Csetup-args=-Duse-ilp64=true


.. _accelerated-blas-lapack-libraries:
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