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gh-76327: freeze_support for non-Windows platforms#104607

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@zetaloopzetaloop commentedMay 18, 2023•
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gh-76327: freeze_support for non-Windows platforms

This is a brief fix for the multiprocessing frozen executable infinite loop issue on non-Windows platform.#76327
And thefreeze_support patch was exactly the same patch fromPyInstaller, which already worked for them.

This patch does not influencePyInstaller.
However, this patch will enablecx_freeze or other similar tools to build multiprocessing apps for Linux and Mac.

📚 Documentation preview 📚:https://cpython-previews--104607.org.readthedocs.build/

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ghost commentedMay 18, 2023•
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All commit authors signed the Contributor License Agreement.
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Backport needed.

@arhadthedevarhadthedev added the needs backport to 3.11only security fixes labelMay 20, 2023
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Tests done.
Windows 11 (Python 3.11.1):PyInstaller✔️cx_freeze✔️py2exe✔️
WSL Ubuntu 22.04 (Python 3.10.6):PyInstaller✔️cx_freeze✔️

Note: if we don't modifymuliprocessing,cx_freeze on Linux will create an app with terrible infinite loop.

import multiprocessingdef worker():    print('Worker')if __name__ == '__main__':    multiprocessing.freeze_support()    multiprocessing.set_start_method('spawn')    p = multiprocessing.Process(target=worker)    p.start()

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The following commit authors need to sign the Contributor License Agreement:

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@serhiy-storchakaserhiy-storchaka added the needs backport to 3.14bugs and security fixes labelMay 8, 2025
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