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| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | numpy/distutils/misc_util.py | 24 |
2 files changed, 25 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore index a2a1f2b68..d85676249 100644 --- a/.gitignore +++ b/.gitignore @@ -76,6 +76,7 @@ doc/cdoc/build MANIFEST .cache pip-wheel-metadata +.python-version # Paver generated files # ######################### diff --git a/numpy/distutils/misc_util.py b/numpy/distutils/misc_util.py index 60696438f..20cbc855a 100644 --- a/numpy/distutils/misc_util.py +++ b/numpy/distutils/misc_util.py @@ -2362,6 +2362,30 @@ def generate_config_py(target): * ``not found``: dispatched features that are not supported in the system + NumPy BLAS/LAPACK Installation Notes + ------------------------------------ + Installing a numpy wheel (``pip install numpy`` or force it + via ``pip install numpy --only-binary :numpy: numpy``) includes + an OpenBLAS implementation of the BLAS and LAPACK linear algebra + APIs. In this case, ``library_dirs`` reports the original build + time configuration as compiled with gcc/gfortran; at run time + the OpenBLAS library is in + ``site-packages/numpy.libs/`` (linux), or + ``site-packages/numpy/.dylibs/`` (macOS), or + ``site-packages/numpy/.libs/`` (windows). + + Installing numpy from source + (``pip install numpy --no-binary numpy``) searches for BLAS and + LAPACK dynamic link libraries at build time as influenced by + environment variables NPY_BLAS_LIBS, NPY_CBLAS_LIBS, and + NPY_LAPACK_LIBS; or NPY_BLAS_ORDER and NPY_LAPACK_ORDER; + or the optional file ``~/.numpy-site.cfg``. + NumPy remembers those locations and expects to load the same + libraries at run-time. + In NumPy 1.21+ on macOS, 'accelerate' (Apple's Accelerate BLAS + library) is in the default build-time search order after + 'openblas'. + Examples -------- >>> import numpy as np |