ENH: distutils: add support for ILP64 OpenBLAS (generic symbol suffix)

Generalize the ILP64 BLAS/LAPACK symbol name handling to deal with
arbitrary prefix/suffix.

The build-time behavior is changed so that HAVE_BLAS_ILP64 and
BLAS_SYMBOL_SUFFIX/PREFIX defines are added to compile options
as appropriate.

Mainly to make autodetection of BLAS/LAPACK easier for downstream
numpy.distutils users, add get_info aliases 'blas_ilp64_opt',
'blas_ilp64_plain_opt', and 'blas64__opt' for any/no/""&"64_"
prefix&suffix, and the same for lapack. (Due to the way system_info
works, each also gets a separate class.)

In addition to openblas64_ which has a fixed suffix, add the (by default
suffixless) openblas_ilp64, which correspond to the most likely cases to
be present.

1 files changed, 4 insertions, 7 deletions

diff --git a/numpy/core/setup.py b/numpy/core/setup.py
index 5bbb1c622..974ec4628 100644
--- a/numpy/core/setup.py
+++ b/numpy/core/setup.py
@@ -91,9 +91,6 @@ def is_npy_no_smp():
     #  block.
     return 'NPY_NOSMP' in os.environ
 
-def is_npy_use_blas64_():
-    return (os.environ.get('NPY_USE_BLAS64_', "0") != "0")
-
 def win32_checks(deflist):
     from numpy.distutils.misc_util import get_build_architecture
     a = get_build_architecture()
@@ -756,12 +753,12 @@ def configuration(parent_package='',top_path=None):
             join('src', 'common', 'numpyos.c'),
             ]
 
-    if is_npy_use_blas64_():
-        blas_info = get_info('blas64__opt', 2)
-        have_blas = blas_info and ('HAVE_CBLAS64_', None) in blas_info.get('define_macros', [])
+    if os.environ.get('NPY_USE_BLAS_ILP64', "0") != "0":
+        blas_info = get_info('blas_ilp64_opt', 2)
     else:
         blas_info = get_info('blas_opt', 0)
-        have_blas = blas_info and ('HAVE_CBLAS', None) in blas_info.get('define_macros', [])
+
+    have_blas = blas_info and ('HAVE_CBLAS', None) in blas_info.get('define_macros', [])
 
     if have_blas:
         extra_info = blas_info