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Relax the build dependency on NumPy #1121

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Relax the build dependency on NumPy #1121

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Relax the build dependency on NumPy 
Do not pin NumPy build dependencies to specific versions.  It is
no longer necessary since NumPy 1.25, as it automatically exposes
"an API that is backwards compatible with the oldest NumPy version that
supports the currently oldest compatible Python version" -- effectively
removing the need to maintain downstream compatibility matrices.

See: https://numpy.org/devdocs/dev/depending_on_numpy.html#adding-a-dependency-on-numpy
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@mgorny
mgorny committed Jul 7, 2025
commit 4a11e5a46c593e7f6074731c6349b45acea4d173
5 changes: 3 additions & 2 deletions pyproject.toml
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@@ -1,8 +1,9 @@
[build-system]
requires = [
"numpy<2.0; python_version<'3.9'",
"numpy==2.0.2; python_version>='3.9' and python_version<'3.13'",
"numpy==2.1.3; python_version=='3.13'",
# NumPy >=1.25 defaults to exposing "an API that is backwards compatible with the oldest NumPy version that supports the currently oldest compatible Python version"
# https://numpy.org/devdocs/dev/depending_on_numpy.html#adding-a-dependency-on-numpy
"numpy>=2.0; python_version>='3.9'",
"packaging",
"pip",
"scikit-build>=0.14.0",
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