chore: import upstream snapshot with attribution

setup.py

@@ -0,0 +1,121 @@
+#!/usr/bin/env python3
+###################################################################
+#  NumExpr - Fast numerical array expression evaluator for NumPy.
+#
+#      License: MIT
+#      Author:  See AUTHORS.txt
+#
+#  See LICENSE.txt and LICENSES/*.txt for details about copyright and
+#  rights to use.
+####################################################################
+
+import configparser
+import os
+import os.path as op
+import platform
+
+import numpy as np
+from setuptools import Extension, setup
+
+with open('requirements.txt') as f:
+    requirements = f.read().splitlines()
+
+version = open("VERSION").read().strip()
+with open('numexpr/version.py', 'w') as fh:
+    # Create the version.py file
+    fh.write("# THIS FILE IS GENERATED BY `setup.py`\n")
+    fh.write(f"__version__ = '{version}'\n")
+    fh.write(f"version = '{version}'\n")
+    try:
+        fh.write("numpy_build_version = '%s'\n" % np.__version__)
+    except ImportError:
+        pass
+    fh.write("platform_machine = '%s'\n" % platform.machine())
+
+# Read the contents of your README file
+with open('README.rst', encoding='utf-8') as f:
+    long_description = f.read()
+
+lib_dirs = []
+inc_dirs = [np.get_include()]
+libs = []  # Pre-built libraries ONLY, like python36.so
+clibs = []
+def_macros = [
+    # keep in sync with minimal runtime requirement (requirements.txt)
+    ('NPY_TARGET_VERSION', 'NPY_1_23_API_VERSION')
+]
+sources = ['numexpr/interpreter.cpp',
+           'numexpr/module.cpp',
+           'numexpr/numexpr_object.cpp']
+extra_cflags = []
+extra_link_args = []
+
+if platform.uname().system == 'Windows':
+    # For MSVC only
+    if "MSC" in platform.python_compiler():
+        extra_cflags = ['/O2']
+    extra_link_args = []
+    sources.append('numexpr/win32/pthread.c')
+else:
+    extra_cflags = []
+    extra_link_args = []
+
+
+def parse_site_cfg():
+    """
+    Parses `site.cfg`, if it exists, to determine the location of Intel oneAPI MKL.
+
+    To compile NumExpr with MKL (VML) support, typically you need to copy the
+    provided `site.cfg.example` to `site.cfg` and then edit the paths in the
+    configuration lines for `include_dirs` and `library_dirs` paths to point
+    to the appropriate directories on your machine.
+    """
+    site = configparser.ConfigParser()
+    if not op.isfile('site.cfg'):
+        return
+
+    site.read('site.cfg')
+
+    if 'mkl' in site.sections():
+        inc_dirs.extend(
+            site['mkl']['include_dirs'].split(os.pathsep))
+        lib_dirs.extend(
+            site['mkl']['library_dirs'].split(os.pathsep))
+        # numpy's site.cfg splits libraries by comma, but numexpr historically split by os.pathsep.
+        # For compatibility, we split by both.
+        libs.extend(
+            site['mkl']['libraries'].replace(os.pathsep, ',').split(','))
+        def_macros.append(('USE_VML', None))
+        print(f'FOUND MKL IMPORT')
+
+
+def setup_package():
+
+    parse_site_cfg()
+
+    numexpr_extension = Extension(
+        'numexpr.interpreter',
+        include_dirs=inc_dirs,
+        define_macros=def_macros,
+        sources=sources,
+        library_dirs=lib_dirs,
+        libraries=libs,
+        extra_compile_args=extra_cflags,
+        extra_link_args=extra_link_args,
+    )
+
+    metadata = dict(
+        version=version,
+        long_description=long_description,
+        long_description_content_type='text/x-rst',
+        install_requires=requirements,
+        libraries=clibs,
+        ext_modules=[
+            numexpr_extension
+        ],
+    )
+    setup(**metadata)
+
+
+if __name__ == '__main__':
+    setup_package()