Wheels containing OpenBLAS

The primary purposes of the scipy-openblas32 and scipy-openblas64 wheels are:
- (a) to use them as build and runtime dependencies in CI and local development for NumPy and SciPy
- (b) to be vendored into NumPy and SciPy wheels
- (c) possibly, in the future, being used as runtime dependencies for NumPy and/or SciPy.
Other Python projects are also welcome to use these wheels for 1(a) and 1(b).
- Please note that there is no strong guarantee of backwards compatibility for the symbol names nor the small Python API shipped in the wheels to enable linking against the shared library. If you want to use them, you should probably use == pins in the relevant CI/lock files, like NumPy and SciPy also do.

[!WARNING] Please do not add a runtime dependency on these wheels if you're not NumPy or SciPy. This is not supported and likely to lead to breakage or symbol conflicts due to either changes in this repository or due to NumPy or SciPy starting to depend on a particular version of this package.

OpenBLAS library build process

First, OpenBLAS is built using build_lib in tools/build_steps.sh (on posix in a docker and drectly on macos) or tools/build_steps_windows.sh on windows.

Then the shared object and header files are used to build the wheel via tools/build_prepare_wheel.sh and pip build wheel.

If the build is on the main branch, the wheels are uploaded to https://anaconda.org/scientific=python-nightly-wheels/scipy_openblas32 and https://anaconda.org/scientific=python-nightly-wheels/scipy_openblas64 via tools/upload_to_anaconda_staging.sh.

There are workflow triggers for repo admins. They can trigger a testpypi build or a pypi build with the publish workflow, which will upload the wheels using trusted publishing. In order to publish to PyPI, there must be a tag at the HEAD of the branch used to publish. After merging a PR, be sure to update to main and use annotated tags:

git checkout main; git pull
git tag -a v0.3.31.126.4 -m"fixed something"

The wheel is self-contained, it includes all needed gfortran support libraries. On windows, this is a single DLL.

Buildtime

get_include_dir(), get_lib_dir() and get_library() for use in compiler or project arguments
get_pkg_config() will return a multi-line text that can be saved into a file and used with pkg-config for build systems like meson. This works around the problem of relocatable pkg-config files since the windows build uses pkgconfiglite v0.28 which does not support --define-prefix.

Runtime

importing will load openblas into the executable and provide the openblas symbols to the exectuable.

Development Status
- 5 - Production/Stable
License
- OSI Approved :: BSD License
Programming Language
- C++

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scipy_openblas32-0.3.34.106.0-py3-none-win_arm64.whl (5.2 MB view details)

Uploaded Aug 9, 2026 Python 3Windows ARM64

scipy_openblas32-0.3.34.106.0-py3-none-win_amd64.whl (7.2 MB view details)

Uploaded Aug 9, 2026 Python 3Windows x86-64

scipy_openblas32-0.3.34.106.0-py3-none-win32.whl (5.6 MB view details)

Uploaded Aug 9, 2026 Python 3Windows x86

scipy_openblas32-0.3.34.106.0-py3-none-musllinux_1_2_x86_64.whl (9.4 MB view details)

Uploaded Aug 9, 2026 Python 3musllinux: musl 1.2+ x86-64

scipy_openblas32-0.3.34.106.0-py3-none-musllinux_1_2_aarch64.whl (9.6 MB view details)

Uploaded Aug 9, 2026 Python 3musllinux: musl 1.2+ ARM64

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_38_riscv64.manylinux_2_39_riscv64.whl (6.1 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.38+ riscv64manylinux: glibc 2.39+ riscv64

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_28_i686.whl (7.0 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.28+ i686

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl (8.8 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.27+ x86-64manylinux: glibc 2.28+ x86-64

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_27_s390x.manylinux_2_28_s390x.whl (7.0 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.27+ s390xmanylinux: glibc 2.28+ s390x

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_27_ppc64le.manylinux_2_28_ppc64le.whl (9.2 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.27+ ppc64lemanylinux: glibc 2.28+ ppc64le

scipy_openblas32-0.3.34.106.0-py3-none-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl (9.3 MB view details)

Uploaded Aug 9, 2026 Python 3manylinux: glibc 2.27+ ARM64manylinux: glibc 2.28+ ARM64

scipy_openblas32-0.3.34.106.0-py3-none-macosx_11_0_arm64.whl (6.9 MB view details)

Uploaded Aug 9, 2026 Python 3macOS 11.0+ ARM64

scipy_openblas32-0.3.34.106.0-py3-none-macosx_10_9_x86_64.whl (10.4 MB view details)

Uploaded Aug 9, 2026 Python 3macOS 10.9+ x86-64

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Release history Release notifications | RSS feed

This release

0.3.34.106.0

Aug 9, 2026

0.3.34.0.0

Jul 19, 2026

0.3.33.201.0

Jul 5, 2026

0.3.33.112.0

Jun 15, 2026

0.3.33.0.0

May 4, 2026

0.3.31.188.0

Mar 21, 2026

0.3.31.159.0

Mar 18, 2026

0.3.31.126.5

Mar 12, 2026

0.3.31.126.4

Mar 12, 2026

0.3.31.126.1

Mar 8, 2026

0.3.31.126.0 yanked

Mar 8, 2026

Reason this release was yanked:

Bad zip file, see https://github.com/MacPython/openblas-libs/pull/257

0.3.31.22.1

Feb 1, 2026

0.3.31.22.0

Jan 20, 2026

0.3.30.443.1

Jan 14, 2026

0.3.30.443.0

Jan 12, 2026

0.3.30.359.2

Dec 22, 2025

0.3.30.0.8

Nov 20, 2025

0.3.30.0.7

Nov 3, 2025

0.3.30.0.6

Oct 30, 2025

0.3.30.0.4

Oct 22, 2025

0.3.30.0.3

Oct 22, 2025

0.3.30.0.2

Jul 20, 2025

0.3.30.0.1

Jul 3, 2025

0.3.30.0.0

Jun 26, 2025

0.3.29.265.1

Jun 6, 2025

0.3.29.265.0

May 22, 2025

0.3.29.0.0

Jan 21, 2025

0.3.28.0.2

Aug 12, 2024

0.3.28.0.1

Aug 11, 2024

0.3.27.63.1

May 14, 2024

0.3.27.63.0

May 8, 2024

0.3.27.44.6

Aug 12, 2024

0.3.27.44.5

Aug 8, 2024

0.3.27.44.4

Aug 8, 2024

0.3.27.44.3

Apr 18, 2024

0.3.27.44.2

Apr 17, 2024

0.3.27.0.1

Apr 11, 2024

0.3.27.0.0

Apr 10, 2024

0.3.26.0.4

Feb 7, 2024

0.3.26.0.2

Feb 1, 2024

0.3.26.0.1

Feb 1, 2024

0.3.26.0

Jan 31, 2024

0.3.24.95.1

Dec 31, 2023

0.3.24.95.0

Nov 15, 2023

0.3.23.293.2

Sep 28, 2023

0.3.23.293.1

Sep 27, 2023

0.3.23.293

Sep 19, 2023

scipy-openblas32 0.3.34.106.0

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