From a2019e226e4650cef35ebfde7ecd7ce044a4a670 Mon Sep 17 00:00:00 2001
From: Michael Cho <michael@michaelcho.dev>
Date: Thu, 19 Dec 2024 16:14:59 -0500
Subject: [PATCH 1/2] gh-124111: Fix TCL 9 threaded detection

---
 Modules/_tkinter.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 45897817a56051..31f744aaf6e9e2 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -583,8 +583,12 @@ 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;

From ee2bc67beba661de7e3c85e396558bd443734695 Mon Sep 17 00:00:00 2001
From: Zachary Ware <zach@python.org>
Date: Wed, 12 Nov 2025 15:43:00 -0600
Subject: [PATCH 2/2] Add blurb

---
 .../next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2025-11-12-15-42-47.gh-issue-124111.hTw4OE.rst

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.