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Fix: Add [global] to pybind11 in dev requirements for Windows compati… #30124

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@fmargall fmargall commented May 30, 2025

PR summary

When installing matplotlib in editable mode on Windows, the build fails with the error:

fatal error C1083: Cannot open include file: 'pybind11/pybind11.h': No such file or directory

This issue arises because the standard pybind11 installation does not place headers in a globally accessible location. By specifying pybind11[global], the headers are installed in a location where build tools like Meson can find them, resolving the compilation error.

Summary of changes:

  • Update requirements/dev.txt to require pybind11[global] instead of just pybind11.

References:
See pybind11 documentation on global installation.

PR checklist

  • [N/A] "closes #0000" is in the body of the PR description to link the related issue
  • [N/A] new and changed code is tested
  • [N/A] Plotting related features are demonstrated in an example
  • [N/A] New Features and API Changes are noted with a directive and release note
  • [N/A] Documentation complies with general and docstring guidelines

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