Migrate from setup.py to pyproject toml

README.md

@@ -36,10 +36,50 @@ Where `<numpy_version>` should be the latest version from https://software.repos
 
 ## Building
 
-Intel(R) C compiler and Intel(R) Math Kernel Library are required to build `mkl_umath` from source:
+Intel(R) C compiler and Intel(R) OneAPI Math Kernel Library (OneMKL) are required to build `mkl_umath` from source.
 
+If these are installed as part of a `oneAPI` installation, the following packages must also be installed into the environment
+- `cmake`
+- `ninja`
+- `cython`
+- `scikit-build`
+- `numpy`
+
+If build dependencies are to be installed with Conda, the following packages must be installed from the Intel(R) channel
+- `mkl-devel`
+- `dpcpp_linux-64` (or `dpcpp_win-64` for Windows)
+- `numpy-base`
+
+then the remaining dependencies
+- `cmake`
+- `ninja`
+- `cython`
+- `scikit-build`
+
+and for `mkl-devel` and `dpcpp_linux-64` in a Conda environment, `MKLROOT` environment variable must be set
+On Linux
 ```sh
-# ensure that MKL is installed into Python prefix, Intel LLVM compiler is activated
 export MKLROOT=$CONDA_PREFIX
-CC=icx pip install --no-build-isolation --no-deps -e .
+```
+
+On Windows
+```sh
+set MKLROOT=%CONDA_PREFIX%
+```
+
+If using `oneAPI`, it must be activated in the environment
+
+On Linux
+```
+source ${ONEAPI_ROOT}/setvars.sh
+```
+
+On Windows
+```
+call "%ONEAPI_ROOT%\setvars.bat"
+```
+
+finally, execute
+```
+CC=icx pip install --no-build-isolation --no-deps .
 ```

pyproject.toml

@@ -0,0 +1,77 @@
+# Copyright (c) 2025, Intel Corporation
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#     * Redistributions of source code must retain the above copyright notice,
+#       this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#     * Neither the name of Intel Corporation nor the names of its contributors
+#       may be used to endorse or promote products derived from this software
+#       without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = [
+    "cmake",
+    "ninja",
+    "scikit-build",
+    "setuptools>=77",
+    "Cython",
+    "numpy"
+]
+
+[project]
+authors = [
+    {name = "Intel Corporation", email = "[email protected]"}
+]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Science/Research",
+    "Intended Audience :: Developers",
+    "Programming Language :: C",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Topic :: Software Development",
+    "Topic :: Scientific/Engineering",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX",
+    "Operating System :: Unix"
+]
+dependencies = ["numpy >=1.26.4", "mkl-service"]
+description = "Intel (R) MKL-based universal functions for NumPy arrays"
+dynamic = ["version"]
+keywords = ["mkl_umath"]
+license = "BSD-3-Clause"
+name = "mkl_umath"
+readme = {file = "README.md", content-type = "text/markdown"}
+requires-python = ">=3.9,<3.13"
+
+
+[project.optional-dependencies]
+test = ["pytest"]
+
+[project.urls]
+Download = "http://github.com/IntelPython/mkl_umath"
+Homepage = "http://github.com/IntelPython/mkl_umath"
+
+[tool.setuptools.dynamic]
+version = {attr = "mkl_umath._version.__version__"}

setup.py

@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# Copyright (c) 2019-2023, Intel Corporation
+# Copyright (c) 2019-2025, Intel Corporation
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -25,51 +24,19 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import importlib.machinery
-import io
-import os
-import re
-from distutils.dep_util import newer
-from _vendored.conv_template import process_file as process_c_file
-from os import (getcwd, environ, makedirs)
-from os.path import join, exists, abspath, dirname
-from setuptools import Extension
+import sys
+from setuptools.modified import newer
+from os import makedirs
+from os.path import join, exists, dirname
 
 import skbuild
-import skbuild.setuptools_wrap
-import skbuild.utils
-from skbuild.command.build_py import build_py as _skbuild_build_py
-from skbuild.command.install import install as _skbuild_install
-
-# import versioneer
-
-with io.open('mkl_umath/_version.py', 'rt', encoding='utf8') as f:
-    version = re.search(r'__version__ = \'(.*?)\'', f.read()).group(1)
-
-with open("README.md", "r", encoding="utf-8") as file:
-    long_description = file.read()
-
-VERSION = version
-
-CLASSIFIERS = """\
-Development Status :: 5 - Production/Stable
-Intended Audience :: Science/Research
-Intended Audience :: Developers
-License :: OSI Approved
-Programming Language :: C
-Programming Language :: Python
-Programming Language :: Python :: 3.6
-Programming Language :: Python :: 3.7
-Programming Language :: Python :: 3.8
-Programming Language :: Python :: Implementation :: CPython
-Topic :: Software Development
-Topic :: Scientific/Engineering
-Operating System :: Microsoft :: Windows
-Operating System :: POSIX
-Operating System :: Unix
-Operating System :: MacOS
-"""
+
+sys.path.insert(0, dirname(__file__))  # Ensures local imports work
+from _vendored.conv_template import process_file as process_c_file
 
 
+# TODO: rewrite generation in CMake, see NumPy meson implementation
+# https://github.com/numpy/numpy/blob/c6fb3357541fd8cf6e4faeaeda3b1a9065da0520/numpy/_core/meson.build#L623
 def load_module(name, fn):
     """
     Credit: numpy.compat.npy_load_module
@@ -127,28 +94,9 @@ def generate_umath_c(build_dir):
 
 
 skbuild.setup(
-    name="mkl_umath",
-    version=VERSION,
-    maintainer = "Intel Corp.",
-    maintainer_email = "[email protected]",
-    description = "MKL-based universal functions for NumPy arrays",
-    long_description = long_description,
-    long_description_content_type="text/markdown",
-    license = 'BSD',
-    author="Intel Corporation",
-    url="http://github.com/IntelPython/mkl_umath",
-    download_url="http://github.com/IntelPython/mkl_umath",
     packages=[
         "mkl_umath",
     ],
     package_data={"mkl_umath": ["tests/*.*"]},
     include_package_data=True,
-    zip_safe=False,
-    setup_requires=["Cython"],
-    install_requires=[
-        "numpy",
-    ],
-    keywords="mkl_umath",
-    classifiers=[_f for _f in CLASSIFIERS.split("\n") if _f],
-    platforms=["Linux", "Windows"]
 )