TST, MAINT: expand OpenBLAS version checking

* add a function to tools/openblas_support.py
that may be used to test OpenBLAS version
available through NumPy in a manner agnostic
to any specific CI service

* expand OpenBLAS version checking to include
ppc64le and POWER8 CI runs; a separate PR will
be provided to bump these versions to 0.3.7.dev

* OpenBLAS install was broken on ppc64le
Travis CI after migration to tools/openblas_support.py;
fixed that

* Azure CI config no longer uses a single-line
280-character Python "program" assigned to an
environment variable to check OpenBLAS version;
instead, it now leverages tools/openblas_support.py
to perform the same operation using a conventional
Python function

1 files changed, 21 insertions, 1 deletions

diff --git a/tools/openblas_support.py b/tools/openblas_support.py
index 460f36de5..297dc6436 100644
--- a/tools/openblas_support.py
+++ b/tools/openblas_support.py
@@ -192,6 +192,22 @@ def test_setup(arches):
             raise RuntimeError('Could not setup %s' % arch)
         print(target)
 
+def test_version(expected_version):
+    """
+    Assert that expected OpenBLAS version is
+    actually available via NumPy
+    """
+    import numpy
+    import ctypes
+
+    dll = ctypes.CDLL(numpy.core._multiarray_umath.__file__)
+    get_config = dll.openblas_get_config
+    get_config.restype=ctypes.c_char_p
+    res = get_config()
+    print('OpenBLAS get_config returned', str(res))
+    check_str = b'OpenBLAS %s' % expected_version[0].encode()
+    assert check_str in res
+
 if __name__ == '__main__':
     import argparse
     parser = argparse.ArgumentParser(
@@ -199,8 +215,12 @@ if __name__ == '__main__':
                     'architecture')
     parser.add_argument('--test', nargs='*', default=None,
         help='Test different architectures. "all", or any of %s' % ARCHITECTURES)
+    parser.add_argument('--check_version', nargs=1, default=None,
+        help='Check provided OpenBLAS version string against available OpenBLAS')
     args = parser.parse_args()
-    if args.test is None:
+    if args.check_version is not None:
+        test_version(args.check_version)
+    elif args.test is None:
         print(setup_openblas())
     else:
         if len(args.test) == 0 or 'all' in args.test: