https://github.com/python/cpython/commit/dc0987080ed66c662e8e0b24cdb8c179817bd697
commit: dc0987080ed66c662e8e0b24cdb8c179817bd697
branch: main
author: Michael Cho <[email protected]>
committer: zware <[email protected]>
date: 2025-11-12T22:16:58Z
summary:
gh-124111: Fix TCL 9 thread detection (GH-128103)
files:
A Misc/NEWS.d/next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst
M Modules/_tkinter.c
diff --git
a/Misc/NEWS.d/next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst
b/Misc/NEWS.d/next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst
new file mode 100644
index 00000000000000..8436cd2415dbd6
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst
@@ -0,0 +1,2 @@
+Updated Tcl threading configuration in :mod:`_tkinter` to assume that
+threads are always available in Tcl 9 and later.
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index c0ed8977d8fd6f..8cea7b59fe730e 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -575,8 +575,12 @@ Tkapp_New(const char *screenName, const char *className,
v->interp = Tcl_CreateInterp();
v->wantobjects = wantobjects;
+#if TCL_MAJOR_VERSION >= 9
+ v->threaded = 1;
+#else
v->threaded = Tcl_GetVar2Ex(v->interp, "tcl_platform", "threaded",
TCL_GLOBAL_ONLY) != NULL;
+#endif
v->thread_id = Tcl_GetCurrentThread();
v->dispatching = 0;
v->trace = NULL;
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