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BLD: change file extension for libnpymath on win-arm64 from .a to .lib #29840

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Merged
charris merged 2 commits into from
Sep 30, 2025
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BLD: change file extension for libnpymath on win-arm64 from .a to .lib #29840

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BLD: change file extension for libnpymath on win-arm64 from .a to .lib
rgommers Sep 12, 2025
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rgommers Sep 14, 2025
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5 changes: 5 additions & 0 deletions doc/release/upcoming_changes/29750.change.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
The ``npymath`` and ``npyrandom`` libraries now have a ``.lib`` rather than a
``.a`` file extension on win-arm64, for compatibility for building with MSVC and
``setuptools``. Please note that using these static libraries is discouraged
and for existing projects using it, it's best to use it with a matching
compiler toolchain, which is ``clang-cl`` on Windows on Arm.
2 changes: 1 addition & 1 deletion numpy/meson.build
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Expand Up @@ -32,7 +32,7 @@ endif
# than a `.a` file extension in order not to break including them in a
# distutils-based build (see gh-23981 and
# https://mesonbuild.com/FAQ.html#why-does-building-my-project-with-msvc-output-static-libraries-called-libfooa)
if is_windows and cc.get_id() == 'msvc'
if is_windows and cc.get_id() in ['msvc', 'clang-cl']
name_prefix_staticlib = ''
name_suffix_staticlib = 'lib'
else
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