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Force UTF-8 standard I/O for children #87

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Force UTF-8 standard I/O for children #87

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8 changes: 8 additions & 0 deletions compile_all.py
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Original file line number Diff line number Diff line change
Expand Up @@ -982,6 +982,14 @@ def _run_pip_install(
env = os.environ.copy()
env["DISTUTILS_USE_SDK"] = "1"
env["MSSdk"] = "1"
# Force UTF-8 standard I/O for every child process pip spawns. When the parent
# environment sets PYTHONIOENCODING to a UTF-16 codec (PyCharm run configurations
# can do this), meson-python's build backend launches "meson --version", which
# emits its version as UTF-16, then decodes the captured bytes with the locale
# codepage. The result is NUL-interleaved text that meson-python's version parser
# silently treats as version 0, aborting the scipy source build with a misleading
# "Could not find meson version 0.63.3 or newer, found 1.11.1" error.
env["PYTHONIOENCODING"] = "utf-8"
# kiwisolver's pyproject.toml declares dynamic version via setuptools_scm,
# which falls back to "0.0.0" outside a git checkout. Pip's metadata
# consistency check then rejects the sdist (requested 1.5.0, got 0.0.0).
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