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@mdehoon mdehoon commented Nov 8, 2025

This PR modifies _tkinter.c to require that Tcl is built with thread support. It also modifies the documentation file Doc/library/tkinter.rst accordingly.

Note that this only affects Tcl 8.x, as Tcl 9.x no longer has the --disable-threads build option and is always thread-enabled.


📚 Documentation preview 📚: https://cpython-previews--141241.org.readthedocs.build/

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mdehoon commented Nov 8, 2025

Note: The compile-time test for TCL_MAJOR_VERSION < 9 is needed because the macOS tests use Tcl from homebrew, which provides Tcl 9.0.2.

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