Merge pull request #24409 from charris/prepare-1.26.0b1-release

REL: Prepare for the NumPy 1.26.0b1 release.

doc/changelog/1.26.0-changelog.rst

@@ -0,0 +1,41 @@
+
+Contributors
+============
+
+A total of 11 people contributed to this release.  People with a "+" by their
+names contributed a patch for the first time.
+
+* Bas van Beek
+* Charles Harris
+* Matti Picus
+* Melissa Weber Mendonça
+* Ralf Gommers
+* Sayed Adel
+* Sebastian Berg
+* Stefan van der Walt
+* Tyler Reddy
+* Warren Weckesser
+
+Pull requests merged
+====================
+
+A total of 18 pull requests were merged for this release.
+
+* `#24305 <https://github.com/numpy/numpy/pull/24305>`__: MAINT: Prepare 1.26.x branch for development
+* `#24308 <https://github.com/numpy/numpy/pull/24308>`__: MAINT: Massive update of files from main for numpy 1.26
+* `#24322 <https://github.com/numpy/numpy/pull/24322>`__: CI: fix wheel builds on the 1.26.x branch
+* `#24326 <https://github.com/numpy/numpy/pull/24326>`__: BLD: update openblas to newer version
+* `#24327 <https://github.com/numpy/numpy/pull/24327>`__: TYP: Trim down the ``_NestedSequence.__getitem__`` signature
+* `#24328 <https://github.com/numpy/numpy/pull/24328>`__: BUG: fix choose refcount leak
+* `#24337 <https://github.com/numpy/numpy/pull/24337>`__: TST: fix running the test suite in builds without BLAS/LAPACK
+* `#24338 <https://github.com/numpy/numpy/pull/24338>`__: BUG: random: Fix generation of nan by dirichlet.
+* `#24340 <https://github.com/numpy/numpy/pull/24340>`__: MAINT: Dependabot updates from main
+* `#24342 <https://github.com/numpy/numpy/pull/24342>`__: MAINT: Add back NPY_RUN_MYPY_IN_TESTSUITE=1
+* `#24353 <https://github.com/numpy/numpy/pull/24353>`__: MAINT: Update ``extbuild.py`` from main.
+* `#24356 <https://github.com/numpy/numpy/pull/24356>`__: TST: fix distutils tests for deprecations in recent setuptools...
+* `#24375 <https://github.com/numpy/numpy/pull/24375>`__: MAINT: Update cibuildwheel to version 2.15.0
+* `#24381 <https://github.com/numpy/numpy/pull/24381>`__: MAINT: Fix codespaces setup.sh script
+* `#24403 <https://github.com/numpy/numpy/pull/24403>`__: ENH: Vendor meson for multi-target build support
+* `#24404 <https://github.com/numpy/numpy/pull/24404>`__: BLD: vendor meson-python to make the Windows builds with SIMD...
+* `#24405 <https://github.com/numpy/numpy/pull/24405>`__: BLD, SIMD: The meson CPU dispatcher implementation
+* `#24406 <https://github.com/numpy/numpy/pull/24406>`__: MAINT: Remove versioneer

doc/source/release/1.26.0-notes.rst

@@ -4,9 +4,114 @@
 NumPy 1.26.0 Release Notes
 ==========================
 
-The NumPy 1.26.0 release is a continuation of the 1.25.x release cycle, but
-with the distutils based build replaced by meson in order to work with Python
-3.12.
+The NumPy 1.26.0 release is a continuation of the 1.25.x release cycle with the
+addition of Python 3.12.0 support. Python 3.12 dropped distutils, consequently
+supporting it required finding a replacement for the setup.py/distutils based
+build system NumPy was using. We have chosen to use the Meson build system
+instead, and this is the first NumPy release supporting it. This is also the
+first release that supports Cython 3.0 in addition to retaining 0.29.X
+compatibility. Supporting those two upgrades was a large project, over 100
+files have been touched in this release. The changelog doesn't capture the full
+extent of the work, special thanks to Ralf Gommers, Sayed Adel, Stéfan van der
+Walt, and Matti Picus who did much of the work in the main development branch.
+
+The highlights of this release are:
+
+- Python 3.12.0 support.
+- Cython 3.0.0 compatibility.
+- Use of the Meson build system
+- Updated SIMD support
 
 The Python versions supported in this release are 3.9-3.12.
 
+Build system changes
+====================
+
+In this release, NumPy has switched to Meson as the build system and
+meson-python as the build backend. Installing NumPy or building a wheel can be
+done with standard tools like ``pip`` and ``pypa/build``. The following are
+supported:
+
+- Regular installs: ``pip install numpy`` or (in a cloned repo)
+  ``pip install .``
+- Building a wheel: ``python -m build`` (preferred), or ``pip wheel .``
+- Editable installs: ``pip install -e . --no-build-isolation``
+- Development builds through the custom CLI implemented with
+  `spin <https://github.com/scientific-python/spin>`__: ``spin build``.
+
+All the regular ``pip`` and ``pypa/build`` flags (e.g.,
+``--no-build-isolation``) should work as expected.
+
+NumPy-specific build customization
+----------------------------------
+
+Many of the NumPy-specific ways of customizing builds have changed.
+The ``NPY_*`` environment variables which control BLAS/LAPACK, SIMD, threading,
+and other such options are no longer supported, nor is a ``site.cfg`` file to
+select BLAS and LAPACK. Instead, there are command-line flags that can be
+passed to the build via ``pip``/``build``'s config-settings interface. These
+flags are all listed in the ``meson_options.txt`` file in the root of the repo.
+Detailed documented will be available before the final 1.26.0 release; for now
+please see `the SciPy "building from source" docs
+<http://scipy.github.io/devdocs/building/index.html>`__ since most build
+customization works in an almost identical way in SciPy as it does in NumPy.
+
+Build dependencies
+------------------
+
+While the runtime dependencies of NumPy have not changed, the build
+dependencies have. Because we temporarily vendor Meson and meson-python,
+there are several new dependencies - please see the ``[build-system]`` section
+of ``pyproject.toml`` for details.
+
+Troubleshooting
+---------------
+
+This build system change is quite large. In case of unexpected issues, it is
+still possible to use a ``setup.py``-based build as a temporary workaround (on
+Python 3.9-3.11, not 3.12), by copying ``pyproject.toml.setuppy`` to
+``pyproject.toml``. However, please open an issue with details on the NumPy
+issue tracker. We aim to phase out ``setup.py`` builds as soon as possible, and
+therefore would like to see all potential blockers surfaced early on in the
+1.26.0 release cycle.
+
+Contributors
+============
+
+A total of 11 people contributed to this release.  People with a "+" by their
+names contributed a patch for the first time.
+
+* Bas van Beek
+* Charles Harris
+* Matti Picus
+* Melissa Weber Mendonça
+* Ralf Gommers
+* Sayed Adel
+* Sebastian Berg
+* Stefan van der Walt
+* Tyler Reddy
+* Warren Weckesser
+
+Pull requests merged
+====================
+
+A total of 18 pull requests were merged for this release.
+
+* `#24305 <https://github.com/numpy/numpy/pull/24305>`__: MAINT: Prepare 1.26.x branch for development
+* `#24308 <https://github.com/numpy/numpy/pull/24308>`__: MAINT: Massive update of files from main for numpy 1.26
+* `#24322 <https://github.com/numpy/numpy/pull/24322>`__: CI: fix wheel builds on the 1.26.x branch
+* `#24326 <https://github.com/numpy/numpy/pull/24326>`__: BLD: update openblas to newer version
+* `#24327 <https://github.com/numpy/numpy/pull/24327>`__: TYP: Trim down the ``_NestedSequence.__getitem__`` signature
+* `#24328 <https://github.com/numpy/numpy/pull/24328>`__: BUG: fix choose refcount leak
+* `#24337 <https://github.com/numpy/numpy/pull/24337>`__: TST: fix running the test suite in builds without BLAS/LAPACK
+* `#24338 <https://github.com/numpy/numpy/pull/24338>`__: BUG: random: Fix generation of nan by dirichlet.
+* `#24340 <https://github.com/numpy/numpy/pull/24340>`__: MAINT: Dependabot updates from main
+* `#24342 <https://github.com/numpy/numpy/pull/24342>`__: MAINT: Add back NPY_RUN_MYPY_IN_TESTSUITE=1
+* `#24353 <https://github.com/numpy/numpy/pull/24353>`__: MAINT: Update ``extbuild.py`` from main.
+* `#24356 <https://github.com/numpy/numpy/pull/24356>`__: TST: fix distutils tests for deprecations in recent setuptools...
+* `#24375 <https://github.com/numpy/numpy/pull/24375>`__: MAINT: Update cibuildwheel to version 2.15.0
+* `#24381 <https://github.com/numpy/numpy/pull/24381>`__: MAINT: Fix codespaces setup.sh script
+* `#24403 <https://github.com/numpy/numpy/pull/24403>`__: ENH: Vendor meson for multi-target build support
+* `#24404 <https://github.com/numpy/numpy/pull/24404>`__: BLD: vendor meson-python to make the Windows builds with SIMD...
+* `#24405 <https://github.com/numpy/numpy/pull/24405>`__: BLD, SIMD: The meson CPU dispatcher implementation
+* `#24406 <https://github.com/numpy/numpy/pull/24406>`__: MAINT: Remove versioneer

numpy/tests/test_ctypeslib.py

@@ -213,6 +213,10 @@ def test_pointer(self):
         # shape argument is required
         assert_raises(TypeError, as_array, p)
 
+    @pytest.mark.skipif(
+        sys.version_info == (3, 12, 0, "candidate", 1),
+        reason="Broken in 3.12.0rc1, see gh-24399",
+    )
     def test_struct_array_pointer(self):
         from ctypes import c_int16, Structure, pointer
 

pyproject.toml

@@ -2,7 +2,7 @@
 build-backend = "mesonpy"
 backend-path = ['./vendored-meson/meson-python']
 requires = [
-    "Cython>=3.0",
+    "Cython>=0.29.34,<3.1",
     # All dependencies of the vendored meson-python (except for meson, because
     # we've got that vendored too - that's the point of this exercise).
     'pyproject-metadata >= 0.7.1',
@@ -17,7 +17,7 @@ requires = [
 
 [project]
 name = "numpy"
-version = "2.0.0.dev0"
+version = "1.26.0b1"
 # TODO: add `license-files` once PEP 639 is accepted (see meson-python#88)
 license = {file = "LICENSE.txt"}
 
@@ -26,7 +26,7 @@ authors = [{name = "Travis E. Oliphant et al."}]
 maintainers = [
     {name = "NumPy Developers", email="numpy-discussion@python.org"},
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.9,<3.13"
 readme = "README.md"
 classifiers = [
     'Development Status :: 5 - Production/Stable',

pyproject.toml.setuppy

@@ -3,7 +3,7 @@
 # to avoid building with Meson (e.g., in the Emscripten/Pyodide CI job)
 [project]
 name = "numpy"
-version = "2.0.0.dev0"
+version = "1.26.0b1"
 
 [build-system]
 requires = [