bpo-46996: Remove support of Tcl/Tk < 8.5.12 (GH-31839)

10 files changed, 90 insertions, 216 deletions

diff --git a/Doc/library/tkinter.ttk.rst b/Doc/library/tkinter.ttk.rst
index 2db4c0f..d50ea99 100644
--- a/Doc/library/tkinter.ttk.rst
+++ b/Doc/library/tkinter.ttk.rst
@@ -13,9 +13,7 @@
 --------------
 
 The :mod:`tkinter.ttk` module provides access to the Tk themed widget set,
-introduced in Tk 8.5. If Python has not been compiled against Tk 8.5, this
-module can still be accessed if *Tile* has been installed.  The former
-method using Tk 8.5 provides additional benefits including anti-aliased font
+introduced in Tk 8.5. It provides additional benefits including anti-aliased font
 rendering under X11 and window transparency (requiring a composition
 window manager on X11).
 
diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
index 9fbf467..3914234 100644
--- a/Doc/whatsnew/3.11.rst
+++ b/Doc/whatsnew/3.11.rst
@@ -712,6 +712,9 @@ Build Changes
   be removed at some point in the future. (Contributed by Mark Dickinson in
   :issue:`45569`.)
 
+* The :mod:`tkinter` package now requires Tcl/Tk version 8.5.12 or newer.
+  (Contributed by Serhiy Storchaka in :issue:`46996`.)
+
 
 C API Changes
 =============
diff --git a/Lib/test/test_tcl.py b/Lib/test/test_tcl.py
index 581c31c..e73ad59 100644
--- a/Lib/test/test_tcl.py
+++ b/Lib/test/test_tcl.py
@@ -143,27 +143,18 @@ class TclTest(unittest.TestCase):
         self.assertRaises(TclError,tcl.unsetvar,'a')
 
     def get_integers(self):
-        integers = (0, 1, -1, 2**31-1, -2**31, 2**31, -2**31-1, 2**63-1, -2**63)
-        # bignum was added in Tcl 8.5, but its support is able only since 8.5.8.
-        # Actually it is determined at compile time, so using get_tk_patchlevel()
-        # is not reliable.
-        # TODO: expose full static version.
-        if tcl_version >= (8, 5):
-            v = get_tk_patchlevel()
-            if v >= (8, 6, 0, 'final') or (8, 5, 8) <= v < (8, 6):
-                integers += (2**63, -2**63-1, 2**1000, -2**1000)
-        return integers
+        return (0, 1, -1,
+                2**31-1, -2**31, 2**31, -2**31-1,
+                2**63-1, -2**63, 2**63, -2**63-1,
+                2**1000, -2**1000)
 
     def test_getint(self):
         tcl = self.interp.tk
         for i in self.get_integers():
             self.assertEqual(tcl.getint(' %d ' % i), i)
-            if tcl_version >= (8, 5):
-                self.assertEqual(tcl.getint(' %#o ' % i), i)
+            self.assertEqual(tcl.getint(' %#o ' % i), i)
             self.assertEqual(tcl.getint((' %#o ' % i).replace('o', '')), i)
             self.assertEqual(tcl.getint(' %#x ' % i), i)
-        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
-            self.assertRaises(TclError, tcl.getint, str(2**1000))
         self.assertEqual(tcl.getint(42), 42)
         self.assertRaises(TypeError, tcl.getint)
         self.assertRaises(TypeError, tcl.getint, '42', '10')
@@ -317,8 +308,7 @@ class TclTest(unittest.TestCase):
         check('"a\xbd\u20ac"', 'a\xbd\u20ac')
         check(r'"a\xbd\u20ac"', 'a\xbd\u20ac')
         check(r'"a\0b"', 'a\x00b')
-        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
-            check('2**64', str(2**64))
+        check('2**64', str(2**64))
 
     def test_exprdouble(self):
         tcl = self.interp
@@ -349,8 +339,7 @@ class TclTest(unittest.TestCase):
         check('[string length "a\xbd\u20ac"]', 3.0)
         check(r'[string length "a\xbd\u20ac"]', 3.0)
         self.assertRaises(TclError, tcl.exprdouble, '"abc"')
-        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
-            check('2**64', float(2**64))
+        check('2**64', float(2**64))
 
     def test_exprlong(self):
         tcl = self.interp
@@ -381,8 +370,7 @@ class TclTest(unittest.TestCase):
         check('[string length "a\xbd\u20ac"]', 3)
         check(r'[string length "a\xbd\u20ac"]', 3)
         self.assertRaises(TclError, tcl.exprlong, '"abc"')
-        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
-            self.assertRaises(TclError, tcl.exprlong, '2**64')
+        self.assertRaises(TclError, tcl.exprlong, '2**64')
 
     def test_exprboolean(self):
         tcl = self.interp
@@ -422,10 +410,8 @@ class TclTest(unittest.TestCase):
         check('[string length "a\xbd\u20ac"]', True)
         check(r'[string length "a\xbd\u20ac"]', True)
         self.assertRaises(TclError, tcl.exprboolean, '"abc"')
-        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
-            check('2**64', True)
+        check('2**64', True)
 
-    @unittest.skipUnless(tcl_version >= (8, 5), 'requires Tcl version >= 8.5')
     def test_booleans(self):
         tcl = self.interp
         def check(expr, expected):
@@ -455,8 +441,6 @@ class TclTest(unittest.TestCase):
             else:
                 self.assertEqual(result, str(i))
                 self.assertIsInstance(result, str)
-        if get_tk_patchlevel() < (8, 5):  # bignum was added in Tcl 8.5
-            self.assertRaises(TclError, tcl.call, 'expr', str(2**1000))
 
     def test_passing_values(self):
         def passValue(value):
@@ -485,8 +469,6 @@ class TclTest(unittest.TestCase):
                          b'str\xbding' if self.wantobjects else 'str\xbding')
         for i in self.get_integers():
             self.assertEqual(passValue(i), i if self.wantobjects else str(i))
-        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
-            self.assertEqual(passValue(2**1000), str(2**1000))
         for f in (0.0, 1.0, -1.0, 1/3,
                   sys.float_info.min, sys.float_info.max,
                   -sys.float_info.min, -sys.float_info.max):
@@ -552,8 +534,6 @@ class TclTest(unittest.TestCase):
         check(b'str\xc0\x80ing\xe2\x82\xac', 'str\xc0\x80ing\xe2\x82\xac')
         for i in self.get_integers():
             check(i, str(i))
-        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
-            check(2**1000, str(2**1000))
         for f in (0.0, 1.0, -1.0):
             check(f, repr(f))
         for f in (1/3.0, sys.float_info.min, sys.float_info.max,
@@ -600,16 +580,14 @@ class TclTest(unittest.TestCase):
                 ('1', '2', '3.4')),
         ]
         tk_patchlevel = get_tk_patchlevel()
-        if tcl_version >= (8, 5):
-            if not self.wantobjects or tk_patchlevel < (8, 5, 5):
-                # Before 8.5.5 dicts were converted to lists through string
-                expected = ('12', '\u20ac', '\xe2\x82\xac', '3.4')
-            else:
-                expected = (12, '\u20ac', b'\xe2\x82\xac', (3.4,))
-            testcases += [
-                (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
-                    expected),
-            ]
+        if not self.wantobjects:
+            expected = ('12', '\u20ac', '\xe2\x82\xac', '3.4')
+        else:
+            expected = (12, '\u20ac', b'\xe2\x82\xac', (3.4,))
+        testcases += [
+            (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
+                expected),
+        ]
         dbg_info = ('want objects? %s, Tcl version: %s, Tk patchlevel: %s'
                     % (self.wantobjects, tcl_version, tk_patchlevel))
         for arg, res in testcases:
@@ -642,15 +620,13 @@ class TclTest(unittest.TestCase):
             {'a': (1, 2, 3) if self.wantobjects else '1 2 3',
              'something': 'foo', 'status': ''})
 
-        if tcl_version >= (8, 5):
-            arg = tcl.call('dict', 'create',
-                           '-a', (1, 2, 3), '-something', 'foo', 'status', ())
-            if not self.wantobjects or get_tk_patchlevel() < (8, 5, 5):
-                # Before 8.5.5 dicts were converted to lists through string
-                expected = {'a': '1 2 3', 'something': 'foo', 'status': ''}
-            else:
-                expected = {'a': (1, 2, 3), 'something': 'foo', 'status': ''}
-            self.assertEqual(splitdict(tcl, arg), expected)
+        arg = tcl.call('dict', 'create',
+                       '-a', (1, 2, 3), '-something', 'foo', 'status', ())
+        if not self.wantobjects:
+            expected = {'a': '1 2 3', 'something': 'foo', 'status': ''}
+        else:
+            expected = {'a': (1, 2, 3), 'something': 'foo', 'status': ''}
+        self.assertEqual(splitdict(tcl, arg), expected)
 
     def test_join(self):
         join = tkinter._join
diff --git a/Lib/tkinter/test/test_tkinter/test_geometry_managers.py b/Lib/tkinter/test/test_tkinter/test_geometry_managers.py
index c645d43..c89bc8d 100644
--- a/Lib/tkinter/test/test_tkinter/test_geometry_managers.py
+++ b/Lib/tkinter/test/test_tkinter/test_geometry_managers.py
@@ -4,7 +4,7 @@ import tkinter
 from tkinter import TclError
 from test.support import requires
 
-from tkinter.test.support import pixels_conv, tcl_version, requires_tcl
+from tkinter.test.support import pixels_conv
 from tkinter.test.widget_tests import AbstractWidgetTest
 
 requires('gui')
@@ -295,8 +295,7 @@ class PlaceTest(AbstractWidgetTest, unittest.TestCase):
         with self.assertRaisesRegex(TclError, "can't place %s relative to "
                                     "itself" % re.escape(str(f2))):
             f2.place_configure(in_=f2)
-        if tcl_version >= (8, 5):
-            self.assertEqual(f2.winfo_manager(), '')
+        self.assertEqual(f2.winfo_manager(), '')
         with self.assertRaisesRegex(TclError, 'bad window path name'):
             f2.place_configure(in_='spam')
         f2.place_configure(in_=f)
@@ -491,8 +490,7 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
         for i in range(rows + 1):
             self.root.grid_rowconfigure(i, weight=0, minsize=0, pad=0, uniform='')
         self.root.grid_propagate(1)
-        if tcl_version >= (8, 5):
-            self.root.grid_anchor('nw')
+        self.root.grid_anchor('nw')
         super().tearDown()
 
     def test_grid_configure(self):
@@ -619,16 +617,14 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
             self.root.grid_columnconfigure((0, 3))
         b = tkinter.Button(self.root)
         b.grid_configure(column=0, row=0)
-        if tcl_version >= (8, 5):
-            self.root.grid_columnconfigure('all', weight=3)
-            with self.assertRaisesRegex(TclError, 'expected integer but got "all"'):
-                self.root.grid_columnconfigure('all')
-            self.assertEqual(self.root.grid_columnconfigure(0, 'weight'), 3)
+        self.root.grid_columnconfigure('all', weight=3)
+        with self.assertRaisesRegex(TclError, 'expected integer but got "all"'):
+            self.root.grid_columnconfigure('all')
+        self.assertEqual(self.root.grid_columnconfigure(0, 'weight'), 3)
         self.assertEqual(self.root.grid_columnconfigure(3, 'weight'), 2)
         self.assertEqual(self.root.grid_columnconfigure(265, 'weight'), 0)
-        if tcl_version >= (8, 5):
-            self.root.grid_columnconfigure(b, weight=4)
-            self.assertEqual(self.root.grid_columnconfigure(0, 'weight'), 4)
+        self.root.grid_columnconfigure(b, weight=4)
+        self.assertEqual(self.root.grid_columnconfigure(0, 'weight'), 4)
 
     def test_grid_columnconfigure_minsize(self):
         with self.assertRaisesRegex(TclError, 'bad screen distance "foo"'):
@@ -675,16 +671,14 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
             self.root.grid_rowconfigure((0, 3))
         b = tkinter.Button(self.root)
         b.grid_configure(column=0, row=0)
-        if tcl_version >= (8, 5):
-            self.root.grid_rowconfigure('all', weight=3)
-            with self.assertRaisesRegex(TclError, 'expected integer but got "all"'):
-                self.root.grid_rowconfigure('all')
-            self.assertEqual(self.root.grid_rowconfigure(0, 'weight'), 3)
+        self.root.grid_rowconfigure('all', weight=3)
+        with self.assertRaisesRegex(TclError, 'expected integer but got "all"'):
+            self.root.grid_rowconfigure('all')
+        self.assertEqual(self.root.grid_rowconfigure(0, 'weight'), 3)
         self.assertEqual(self.root.grid_rowconfigure(3, 'weight'), 2)
         self.assertEqual(self.root.grid_rowconfigure(265, 'weight'), 0)
-        if tcl_version >= (8, 5):
-            self.root.grid_rowconfigure(b, weight=4)
-            self.assertEqual(self.root.grid_rowconfigure(0, 'weight'), 4)
+        self.root.grid_rowconfigure(b, weight=4)
+        self.assertEqual(self.root.grid_rowconfigure(0, 'weight'), 4)
 
     def test_grid_rowconfigure_minsize(self):
         with self.assertRaisesRegex(TclError, 'bad screen distance "foo"'):
@@ -774,7 +768,6 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
         self.assertEqual(info['pady'], self._str(4))
         self.assertEqual(info['sticky'], 'ns')
 
-    @requires_tcl(8, 5)
     def test_grid_anchor(self):
         with self.assertRaisesRegex(TclError, 'bad anchor "x"'):
             self.root.grid_anchor('x')
diff --git a/Lib/tkinter/test/test_tkinter/test_widgets.py b/Lib/tkinter/test/test_tkinter/test_widgets.py
index c0b92bf..fe8ecfe 100644
--- a/Lib/tkinter/test/test_tkinter/test_widgets.py
+++ b/Lib/tkinter/test/test_tkinter/test_widgets.py
@@ -4,11 +4,11 @@ from tkinter import TclError
 import os
 from test.support import requires
 
-from tkinter.test.support import (tcl_version, requires_tcl,
+from tkinter.test.support import (requires_tcl,
                                   get_tk_patchlevel, widget_eq,
                                   AbstractDefaultRootTest)
 from tkinter.test.widget_tests import (
-    add_standard_options, noconv, pixels_round,
+    add_standard_options,
     AbstractWidgetTest, StandardOptionsTests, IntegerSizeTests, PixelSizeTests,
     setUpModule)
 
@@ -20,7 +20,7 @@ def float_round(x):
 
 
 class AbstractToplevelTest(AbstractWidgetTest, PixelSizeTests):
-    _conv_pad_pixels = noconv
+    _conv_pad_pixels = False
 
     def test_configure_class(self):
         widget = self.create()
@@ -139,7 +139,7 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
 
 
 class AbstractLabelTest(AbstractWidgetTest, IntegerSizeTests):
-    _conv_pixels = noconv
+    _conv_pixels = False
 
     def test_configure_highlightthickness(self):
         widget = self.create()
@@ -249,7 +249,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
         'takefocus', 'text', 'textvariable',
         'underline', 'width', 'wraplength',
     )
-    _conv_pixels = staticmethod(pixels_round)
+    _conv_pixels = round
 
     def create(self, **kwargs):
         return tkinter.Menubutton(self.root, **kwargs)
@@ -345,10 +345,7 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
         self.checkPixelsParam(widget, 'insertwidth', 1.3, 3.6, '10p')
         self.checkParam(widget, 'insertwidth', 0.1, expected=2)
         self.checkParam(widget, 'insertwidth', -2, expected=2)
-        if pixels_round(0.9) <= 0:
-            self.checkParam(widget, 'insertwidth', 0.9, expected=2)
-        else:
-            self.checkParam(widget, 'insertwidth', 0.9, expected=1)
+        self.checkParam(widget, 'insertwidth', 0.9, expected=1)
 
     def test_configure_invalidcommand(self):
         widget = self.create()
@@ -550,8 +547,6 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
         'tabs', 'tabstyle', 'takefocus', 'undo', 'width', 'wrap',
         'xscrollcommand', 'yscrollcommand',
     )
-    if tcl_version < (8, 5):
-        _stringify = True
 
     def create(self, **kwargs):
         return tkinter.Text(self.root, **kwargs)
@@ -560,12 +555,10 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
         widget = self.create()
         self.checkBooleanParam(widget, 'autoseparators')
 
-    @requires_tcl(8, 5)
     def test_configure_blockcursor(self):
         widget = self.create()
         self.checkBooleanParam(widget, 'blockcursor')
 
-    @requires_tcl(8, 5)
     def test_configure_endline(self):
         widget = self.create()
         text = '\n'.join('Line %d' for i in range(100))
@@ -589,7 +582,6 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
         widget = self.create()
         self.checkIntegerParam(widget, 'maxundo', 0, 5, -1)
 
-    @requires_tcl(8, 5)
     def test_configure_inactiveselectbackground(self):
         widget = self.create()
         self.checkColorParam(widget, 'inactiveselectbackground')
@@ -603,8 +595,7 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
     def test_configure_selectborderwidth(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'selectborderwidth',
-                              1.3, 2.6, -2, '10p', conv=noconv,
-                              keep_orig=tcl_version >= (8, 5))
+                              1.3, 2.6, -2, '10p', conv=False)
 
     def test_configure_spacing1(self):
         widget = self.create()
@@ -621,7 +612,6 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
         self.checkPixelsParam(widget, 'spacing3', 20, 21.4, 22.6, '0.5c')
         self.checkParam(widget, 'spacing3', -10, expected=0)
 
-    @requires_tcl(8, 5)
     def test_configure_startline(self):
         widget = self.create()
         text = '\n'.join('Line %d' for i in range(100))
@@ -637,27 +627,18 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_configure_state(self):
         widget = self.create()
-        if tcl_version < (8, 5):
-            self.checkParams(widget, 'state', 'disabled', 'normal')
-        else:
-            self.checkEnumParam(widget, 'state', 'disabled', 'normal')
+        self.checkEnumParam(widget, 'state', 'disabled', 'normal')
 
     def test_configure_tabs(self):
         widget = self.create()
-        if get_tk_patchlevel() < (8, 5, 11):
-            self.checkParam(widget, 'tabs', (10.2, 20.7, '1i', '2i'),
-                            expected=('10.2', '20.7', '1i', '2i'))
-        else:
-            self.checkParam(widget, 'tabs', (10.2, 20.7, '1i', '2i'))
+        self.checkParam(widget, 'tabs', (10.2, 20.7, '1i', '2i'))
         self.checkParam(widget, 'tabs', '10.2 20.7 1i 2i',
                         expected=('10.2', '20.7', '1i', '2i'))
         self.checkParam(widget, 'tabs', '2c left 4c 6c center',
                         expected=('2c', 'left', '4c', '6c', 'center'))
         self.checkInvalidParam(widget, 'tabs', 'spam',
-                               errmsg='bad screen distance "spam"',
-                               keep_orig=tcl_version >= (8, 5))
+                               errmsg='bad screen distance "spam"')
 
-    @requires_tcl(8, 5)
     def test_configure_tabstyle(self):
         widget = self.create()
         self.checkEnumParam(widget, 'tabstyle', 'tabular', 'wordprocessor')
@@ -674,10 +655,7 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_configure_wrap(self):
         widget = self.create()
-        if tcl_version < (8, 5):
-            self.checkParams(widget, 'wrap', 'char', 'none', 'word')
-        else:
-            self.checkEnumParam(widget, 'wrap', 'char', 'none', 'word')
+        self.checkEnumParam(widget, 'wrap', 'char', 'none', 'word')
 
     def test_bbox(self):
         widget = self.create()
@@ -1055,12 +1033,12 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
     def test_configure_handlesize(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'handlesize', 8, 9.4, 10.6, -3, '2m',
-                              conv=noconv)
+                              conv=False)
 
     def test_configure_height(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'height', 100, 101.2, 102.6, -100, 0, '1i',
-                              conv=noconv)
+                              conv=False)
 
     def test_configure_opaqueresize(self):
         widget = self.create()
@@ -1076,7 +1054,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
         widget = self.create()
         self.checkPixelsParam(widget, 'proxyborderwidth',
                               0, 1.3, 2.9, 6, -2, '10p',
-                              conv=noconv)
+                              conv=False)
 
     @requires_tcl(8, 6, 5)
     def test_configure_proxyrelief(self):
@@ -1098,7 +1076,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
     def test_configure_sashwidth(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'sashwidth', 10, 11.1, 15.6, -3, '1m',
-                              conv=noconv)
+                              conv=False)
 
     def test_configure_showhandle(self):
         widget = self.create()
@@ -1107,7 +1085,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
     def test_configure_width(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'width', 402, 403.4, 404.6, -402, 0, '5i',
-                              conv=noconv)
+                              conv=False)
 
     def create2(self):
         p = self.create()
@@ -1127,15 +1105,12 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
             self.assertEqual(v, p.paneconfigure(b, k))
             self.assertEqual(v[4], p.panecget(b, k))
 
-    def check_paneconfigure(self, p, b, name, value, expected, stringify=False):
-        conv = lambda x: x
-        if not self.wantobjects or stringify:
+    def check_paneconfigure(self, p, b, name, value, expected):
+        if not self.wantobjects:
             expected = str(expected)
-        if self.wantobjects and stringify:
-            conv = str
         p.paneconfigure(b, **{name: value})
-        self.assertEqual(conv(p.paneconfigure(b, name)[4]), expected)
-        self.assertEqual(conv(p.panecget(b, name)), expected)
+        self.assertEqual(p.paneconfigure(b, name)[4], expected)
+        self.assertEqual(p.panecget(b, name), expected)
 
     def check_paneconfigure_bad(self, p, b, name, msg):
         with self.assertRaisesRegex(TclError, msg):
@@ -1155,12 +1130,10 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_paneconfigure_height(self):
         p, b, c = self.create2()
-        self.check_paneconfigure(p, b, 'height', 10, 10,
-                                 stringify=get_tk_patchlevel() < (8, 5, 11))
+        self.check_paneconfigure(p, b, 'height', 10, 10)
         self.check_paneconfigure_bad(p, b, 'height',
                                      'bad screen distance "badValue"')
 
-    @requires_tcl(8, 5)
     def test_paneconfigure_hide(self):
         p, b, c = self.create2()
         self.check_paneconfigure(p, b, 'hide', False, 0)
@@ -1193,7 +1166,6 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
                                      'be a string containing zero or more of '
                                      'n, e, s, and w')
 
-    @requires_tcl(8, 5)
     def test_paneconfigure_stretch(self):
         p, b, c = self.create2()
         self.check_paneconfigure(p, b, 'stretch', 'alw', 'always')
@@ -1203,8 +1175,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_paneconfigure_width(self):
         p, b, c = self.create2()
-        self.check_paneconfigure(p, b, 'width', 10, 10,
-                                 stringify=get_tk_patchlevel() < (8, 5, 11))
+        self.check_paneconfigure(p, b, 'width', 10, 10)
         self.check_paneconfigure_bad(p, b, 'width',
                                      'bad screen distance "badValue"')
 
@@ -1218,7 +1189,7 @@ class MenuTest(AbstractWidgetTest, unittest.TestCase):
         'postcommand', 'relief', 'selectcolor', 'takefocus',
         'tearoff', 'tearoffcommand', 'title', 'type',
     )
-    _conv_pixels = noconv
+    _conv_pixels = False
 
     def create(self, **kwargs):
         return tkinter.Menu(self.root, **kwargs)
@@ -1290,7 +1261,7 @@ class MessageTest(AbstractWidgetTest, unittest.TestCase):
         'justify', 'padx', 'pady', 'relief',
         'takefocus', 'text', 'textvariable', 'width',
     )
-    _conv_pad_pixels = noconv
+    _conv_pad_pixels = False
 
     def create(self, **kwargs):
         return tkinter.Message(self.root, **kwargs)
diff --git a/Lib/tkinter/test/test_ttk/test_widgets.py b/Lib/tkinter/test/test_ttk/test_widgets.py
index 1cb7e74..c14c321 100644
--- a/Lib/tkinter/test/test_ttk/test_widgets.py
+++ b/Lib/tkinter/test/test_ttk/test_widgets.py
@@ -7,7 +7,7 @@ import sys
 from test.test_ttk_textonly import MockTclObj
 from tkinter.test.support import (AbstractTkTest, tcl_version, get_tk_patchlevel,
                                   simulate_mouse_click, AbstractDefaultRootTest)
-from tkinter.test.widget_tests import (add_standard_options, noconv,
+from tkinter.test.widget_tests import (add_standard_options,
     AbstractWidgetTest, StandardOptionsTests, IntegerSizeTests, PixelSizeTests,
     setUpModule)
 
@@ -110,7 +110,7 @@ class WidgetTest(AbstractTkTest, unittest.TestCase):
 
 
 class AbstractToplevelTest(AbstractWidgetTest, PixelSizeTests):
-    _conv_pixels = noconv
+    _conv_pixels = False
 
 
 @add_standard_options(StandardTtkOptionsTests)
@@ -193,7 +193,7 @@ class LabelTest(AbstractLabelTest, unittest.TestCase):
         'takefocus', 'text', 'textvariable',
         'underline', 'width', 'wraplength',
     )
-    _conv_pixels = noconv
+    _conv_pixels = False
 
     def create(self, **kwargs):
         return ttk.Label(self.root, **kwargs)
@@ -473,8 +473,7 @@ class ComboboxTest(EntryTest, unittest.TestCase):
             self.assertEqual(self.combo.get(), getval)
             self.assertEqual(self.combo.current(), currval)
 
-        self.assertEqual(self.combo['values'],
-                         () if tcl_version < (8, 5) else '')
+        self.assertEqual(self.combo['values'], '')
         check_get_current('', -1)
 
         self.checkParam(self.combo, 'values', 'mon tue wed thur',
@@ -741,7 +740,7 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
         'class', 'command', 'cursor', 'from', 'length',
         'orient', 'style', 'takefocus', 'to', 'value', 'variable',
     )
-    _conv_pixels = noconv
+    _conv_pixels = False
     default_orient = 'horizontal'
 
     def setUp(self):
@@ -848,7 +847,7 @@ class ProgressbarTest(AbstractWidgetTest, unittest.TestCase):
         'mode', 'maximum', 'phase',
         'style', 'takefocus', 'value', 'variable',
     )
-    _conv_pixels = noconv
+    _conv_pixels = False
     default_orient = 'horizontal'
 
     def create(self, **kwargs):
@@ -1231,8 +1230,7 @@ class SpinboxTest(EntryTest, unittest.TestCase):
         self.assertEqual(self.spin.get(), '1')
 
     def test_configure_values(self):
-        self.assertEqual(self.spin['values'],
-                         () if tcl_version < (8, 5) else '')
+        self.assertEqual(self.spin['values'], '')
         self.checkParam(self.spin, 'values', 'mon tue wed thur',
                         expected=('mon', 'tue', 'wed', 'thur'))
         self.checkParam(self.spin, 'values', ('mon', 'tue', 'wed', 'thur'))
@@ -1316,7 +1314,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
     def test_configure_height(self):
         widget = self.create()
         self.checkPixelsParam(widget, 'height', 100, -100, 0, '3c', conv=False)
-        self.checkPixelsParam(widget, 'height', 101.2, 102.6, conv=noconv)
+        self.checkPixelsParam(widget, 'height', 101.2, 102.6, conv=False)
 
     def test_configure_selectmode(self):
         widget = self.create()
diff --git a/Lib/tkinter/test/widget_tests.py b/Lib/tkinter/test/widget_tests.py
index 9702ff4..37d1979 100644
--- a/Lib/tkinter/test/widget_tests.py
+++ b/Lib/tkinter/test/widget_tests.py
@@ -2,26 +2,15 @@
 
 import unittest
 import tkinter
-from tkinter.test.support import (AbstractTkTest, tcl_version, requires_tcl,
-                                  get_tk_patchlevel, pixels_conv, tcl_obj_eq)
+from tkinter.test.support import (AbstractTkTest, tcl_version,
+                                  pixels_conv, tcl_obj_eq)
 import test.support
 
 
-noconv = False
-if get_tk_patchlevel() < (8, 5, 11):
-    noconv = str
-
-pixels_round = round
-if get_tk_patchlevel()[:3] == (8, 5, 11):
-    # Issue #19085: Workaround a bug in Tk
-    # http://core.tcl.tk/tk/info/3497848
-    pixels_round = int
-
-
 _sentinel = object()
 
 class AbstractWidgetTest(AbstractTkTest):
-    _conv_pixels = staticmethod(pixels_round)
+    _conv_pixels = round
     _conv_pad_pixels = None
     _stringify = False
 
@@ -65,8 +54,7 @@ class AbstractWidgetTest(AbstractTkTest):
         self.assertEqual(len(t), 5)
         self.assertEqual2(t[4], expected, eq=eq)
 
-    def checkInvalidParam(self, widget, name, value, errmsg=None, *,
-                          keep_orig=True):
+    def checkInvalidParam(self, widget, name, value, errmsg=None):
         orig = widget[name]
         if errmsg is not None:
             errmsg = errmsg.format(value)
@@ -74,18 +62,12 @@ class AbstractWidgetTest(AbstractTkTest):
             widget[name] = value
         if errmsg is not None:
             self.assertEqual(str(cm.exception), errmsg)
-        if keep_orig:
-            self.assertEqual(widget[name], orig)
-        else:
-            widget[name] = orig
+        self.assertEqual(widget[name], orig)
         with self.assertRaises(tkinter.TclError) as cm:
             widget.configure({name: value})
         if errmsg is not None:
             self.assertEqual(str(cm.exception), errmsg)
-        if keep_orig:
-            self.assertEqual(widget[name], orig)
-        else:
-            widget[name] = orig
+        self.assertEqual(widget[name], orig)
 
     def checkParams(self, widget, name, *values, **kwargs):
         for value in values:
@@ -128,8 +110,7 @@ class AbstractWidgetTest(AbstractTkTest):
 
     def checkCursorParam(self, widget, name, **kwargs):
         self.checkParams(widget, name, 'arrow', 'watch', 'cross', '',**kwargs)
-        if tcl_version >= (8, 5):
-            self.checkParam(widget, name, 'none')
+        self.checkParam(widget, name, 'none')
         self.checkInvalidParam(widget, name, 'spam',
                 errmsg='bad cursor spec "spam"')
 
@@ -154,7 +135,7 @@ class AbstractWidgetTest(AbstractTkTest):
         self.checkInvalidParam(widget, name, 'spam', errmsg=errmsg)
 
     def checkPixelsParam(self, widget, name, *values,
-                         conv=None, keep_orig=True, **kwargs):
+                         conv=None, **kwargs):
         if conv is None:
             conv = self._conv_pixels
         for value in values:
@@ -167,9 +148,9 @@ class AbstractWidgetTest(AbstractTkTest):
             self.checkParam(widget, name, value, expected=expected,
                             conv=conv1, **kwargs)
         self.checkInvalidParam(widget, name, '6x',
-                errmsg='bad screen distance "6x"', keep_orig=keep_orig)
+                errmsg='bad screen distance "6x"')
         self.checkInvalidParam(widget, name, 'spam',
-                errmsg='bad screen distance "spam"', keep_orig=keep_orig)
+                errmsg='bad screen distance "spam"')
 
     def checkReliefParam(self, widget, name):
         self.checkParams(widget, name,
@@ -475,12 +456,10 @@ class StandardOptionsTests:
         widget = self.create()
         self.checkImageParam(widget, 'selectimage')
 
-    @requires_tcl(8, 5)
     def test_configure_tristateimage(self):
         widget = self.create()
         self.checkImageParam(widget, 'tristateimage')
 
-    @requires_tcl(8, 5)
     def test_configure_tristatevalue(self):
         widget = self.create()
         self.checkParam(widget, 'tristatevalue', 'unknowable')
diff --git a/Lib/tkinter/ttk.py b/Lib/tkinter/ttk.py
index acdd565..efeabb7 100644
--- a/Lib/tkinter/ttk.py
+++ b/Lib/tkinter/ttk.py
@@ -28,23 +28,6 @@ __all__ = ["Button", "Checkbutton", "Combobox", "Entry", "Frame", "Label",
 import tkinter
 from tkinter import _flatten, _join, _stringify, _splitdict
 
-# Verify if Tk is new enough to not need the Tile package
-_REQUIRE_TILE = True if tkinter.TkVersion < 8.5 else False
-
-def _load_tile(master):
-    if _REQUIRE_TILE:
-        import os
-        tilelib = os.environ.get('TILE_LIBRARY')
-        if tilelib:
-            # append custom tile path to the list of directories that
-            # Tcl uses when attempting to resolve packages with the package
-            # command
-            master.tk.eval(
-                    'global auto_path; '
-                    'lappend auto_path {%s}' % tilelib)
-
-        master.tk.eval('package require tile') # TclError may be raised here
-        master._tile_loaded = True
 
 def _format_optvalue(value, script=False):
     """Internal function."""
@@ -360,11 +343,6 @@ class Style(object):
 
     def __init__(self, master=None):
         master = setup_master(master)
-
-        if not getattr(master, '_tile_loaded', False):
-            # Load tile now, if needed
-            _load_tile(master)
-
         self.master = master
         self.tk = self.master.tk
 
@@ -546,9 +524,6 @@ class Widget(tkinter.Widget):
             readonly, alternate, invalid
         """
         master = setup_master(master)
-        if not getattr(master, '_tile_loaded', False):
-            # Load tile now, if needed
-            _load_tile(master)
         tkinter.Widget.__init__(self, master, widgetname, kw=kw)
 
 
diff --git a/Misc/NEWS.d/next/Build/2022-03-12-18-09-31.bpo-46996.SygzVz.rst b/Misc/NEWS.d/next/Build/2022-03-12-18-09-31.bpo-46996.SygzVz.rst
new file mode 100644
index 0000000..08138f2
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2022-03-12-18-09-31.bpo-46996.SygzVz.rst
@@ -0,0 +1 @@
+The :mod:`tkinter` package now requires Tcl/Tk version 8.5.12 or newer.
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index cd167fd..4807ad5 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -9,8 +9,8 @@ Copyright (C) 1994 Steen Lumholt.
 
 /* TCL/TK VERSION INFO:
 
-    Only Tcl/Tk 8.4 and later are supported.  Older versions are not
-    supported. Use Python 3.4 or older if you cannot upgrade your
+    Only Tcl/Tk 8.5.12 and later are supported.  Older versions are not
+    supported. Use Python 3.10 or older if you cannot upgrade your
     Tcl/Tk libraries.
 */
 
@@ -54,15 +54,11 @@ Copyright (C) 1994 Steen Lumholt.
 
 #include "tkinter.h"
 
-#if TK_HEX_VERSION < 0x08040200
-#error "Tk older than 8.4 not supported"
+#if TK_HEX_VERSION < 0x0805020c
+#error "Tk older than 8.5.12 not supported"
 #endif
 
-#if TK_HEX_VERSION >= 0x08050208 && TK_HEX_VERSION < 0x08060000 || \
-    TK_HEX_VERSION >= 0x08060200
-#define HAVE_LIBTOMMATH
 #include <tclTomMath.h>
-#endif
 
 #if !(defined(MS_WINDOWS) || defined(__CYGWIN__))
 #define HAVE_CREATEFILEHANDLER
@@ -885,7 +881,6 @@ static PyType_Spec PyTclObject_Type_spec = {
 #define CHECK_STRING_LENGTH(s)
 #endif
 
-#ifdef HAVE_LIBTOMMATH
 static Tcl_Obj*
 asBignumObj(PyObject *value)
 {
@@ -922,7 +917,6 @@ asBignumObj(PyObject *value)
     }
     return result;
 }
-#endif
 
 static Tcl_Obj*
 AsObj(PyObject *value)
@@ -965,9 +959,7 @@ AsObj(PyObject *value)
 #endif
         /* If there is an overflow in the wideInt conversion,
            fall through to bignum handling. */
-#ifdef HAVE_LIBTOMMATH
         return asBignumObj(value);
-#endif
         /* If there is no wideInt or bignum support,
            fall through to default object handling. */
     }
@@ -1087,7 +1079,6 @@ fromWideIntObj(TkappObject *tkapp, Tcl_Obj *value)
         return NULL;
 }
 
-#ifdef HAVE_LIBTOMMATH
 static PyObject*
 fromBignumObj(TkappObject *tkapp, Tcl_Obj *value)
 {
@@ -1122,7 +1113,6 @@ fromBignumObj(TkappObject *tkapp, Tcl_Obj *value)
     mp_clear(&bigValue);
     return res;
 }
-#endif
 
 static PyObject*
 FromObj(TkappObject *tkapp, Tcl_Obj *value)
@@ -1167,13 +1157,11 @@ FromObj(TkappObject *tkapp, Tcl_Obj *value)
            fall through to bignum handling. */
     }
 
-#ifdef HAVE_LIBTOMMATH
     if (value->typePtr == tkapp->IntType ||
         value->typePtr == tkapp->WideIntType ||
         value->typePtr == tkapp->BignumType) {
         return fromBignumObj(tkapp, value);
     }
-#endif
 
     if (value->typePtr == tkapp->ListType) {
         int size;
@@ -1211,23 +1199,19 @@ FromObj(TkappObject *tkapp, Tcl_Obj *value)
         return unicodeFromTclObj(value);
     }
 
-#if TK_HEX_VERSION >= 0x08050000
     if (tkapp->BooleanType == NULL &&
         strcmp(value->typePtr->name, "booleanString") == 0) {
         /* booleanString type is not registered in Tcl */
         tkapp->BooleanType = value->typePtr;
         return fromBoolean(tkapp, value);
     }
-#endif
 
-#ifdef HAVE_LIBTOMMATH
     if (tkapp->BignumType == NULL &&
         strcmp(value->typePtr->name, "bignum") == 0) {
         /* bignum type is not registered in Tcl */
         tkapp->BignumType = value->typePtr;
         return fromBignumObj(tkapp, value);
     }
-#endif
 
     return newPyTclObject(value);
 }
@@ -1921,11 +1905,7 @@ _tkinter_tkapp_getint(TkappObject *self, PyObject *arg)
        Prefer bignum because Tcl_GetWideIntFromObj returns ambiguous result for
        value in ranges -2**64..-2**63-1 and 2**63..2**64-1 (on 32-bit platform).
      */
-#ifdef HAVE_LIBTOMMATH
     result = fromBignumObj(self, value);
-#else
-    result = fromWideIntObj(self, value);
-#endif
     Tcl_DecrRefCount(value);
     if (result != NULL || PyErr_Occurred())
         return result;