diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index f8cae78b909a00..f7b4cdcda826c0 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/Doc/whatsnew/3.14.rst
@@ -1078,6 +1078,14 @@ sys.monitoring
* Two new events are added: :monitoring-event:`BRANCH_LEFT` and
:monitoring-event:`BRANCH_RIGHT`. The ``BRANCH`` event is deprecated.
+
+sysconfig
+---------
+
+* Add ``ABIFLAGS`` key to :func:`sysconfig.get_config_vars` on Windows.
+ (Contributed by Xuehai Pan in :gh:`131799`.)
+
+
threading
---------
@@ -1085,6 +1093,7 @@ threading
to :attr:`threading.Thread.name`.
(Contributed by Victor Stinner in :gh:`59705`.)
+
tkinter
-------
diff --git a/Lib/sysconfig/__init__.py b/Lib/sysconfig/__init__.py
index 18e6b8d25e5b56..dad715eb087387 100644
--- a/Lib/sysconfig/__init__.py
+++ b/Lib/sysconfig/__init__.py
@@ -401,9 +401,20 @@ def _init_non_posix(vars):
vars['BINLIBDEST'] = get_path('platstdlib')
vars['INCLUDEPY'] = get_path('include')
- # Add EXT_SUFFIX, SOABI, and Py_GIL_DISABLED
+ # Add EXT_SUFFIX, SOABI, Py_DEBUG, and Py_GIL_DISABLED
vars.update(_sysconfig.config_vars())
+ # NOTE: ABIFLAGS is only an emulated value. It is not present during build
+ # on Windows. sys.abiflags is absent on Windows and vars['abiflags']
+ # is already widely used to calculate paths, so it should remain an
+ # empty string.
+ vars['ABIFLAGS'] = ''.join(
+ (
+ 't' if vars['Py_GIL_DISABLED'] else '',
+ '_d' if vars['Py_DEBUG'] else '',
+ ),
+ )
+
vars['LIBDIR'] = _safe_realpath(os.path.join(get_config_var('installed_base'), 'libs'))
if hasattr(sys, 'dllhandle'):
dllhandle = _winapi.GetModuleFileName(sys.dllhandle)
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index f1cfff68ad6105..44e6bdf5f00712 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -724,6 +724,8 @@ def test_attributes(self):
self.assertIn(sys.float_repr_style, ('short', 'legacy'))
if not sys.platform.startswith('win'):
self.assertIsInstance(sys.abiflags, str)
+ else:
+ self.assertFalse(hasattr(sys, 'abiflags'))
def test_thread_info(self):
info = sys.thread_info
diff --git a/Lib/test/test_sysconfig.py b/Lib/test/test_sysconfig.py
index cc11eade2e3426..53e55383bf9c72 100644
--- a/Lib/test/test_sysconfig.py
+++ b/Lib/test/test_sysconfig.py
@@ -9,6 +9,7 @@
import textwrap
from copy import copy
+from test import support
from test.support import (
captured_stdout,
is_android,
@@ -455,20 +456,20 @@ def test_library(self):
library = sysconfig.get_config_var('LIBRARY')
ldlibrary = sysconfig.get_config_var('LDLIBRARY')
major, minor = sys.version_info[:2]
- if sys.platform == 'win32':
- self.assertTrue(library.startswith(f'python{major}{minor}'))
- self.assertTrue(library.endswith('.dll'))
+ abiflags = sysconfig.get_config_var('ABIFLAGS')
+ if sys.platform.startswith('win'):
+ self.assertEqual(library, f'python{major}{minor}{abiflags}.dll')
self.assertEqual(library, ldlibrary)
elif is_apple_mobile:
framework = sysconfig.get_config_var('PYTHONFRAMEWORK')
self.assertEqual(ldlibrary, f"{framework}.framework/{framework}")
else:
- self.assertTrue(library.startswith(f'libpython{major}.{minor}'))
- self.assertTrue(library.endswith('.a'))
+ self.assertStartsWith(library, f'libpython{major}.{minor}')
+ self.assertEndsWith(library, '.a')
if sys.platform == 'darwin' and sys._framework:
self.skipTest('gh-110824: skip LDLIBRARY test for framework build')
else:
- self.assertTrue(ldlibrary.startswith(f'libpython{major}.{minor}'))
+ self.assertStartsWith(ldlibrary, f'libpython{major}.{minor}')
@unittest.skipUnless(sys.platform == "darwin", "test only relevant on MacOSX")
@requires_subprocess()
@@ -592,6 +593,63 @@ def test_osx_ext_suffix(self):
suffix = sysconfig.get_config_var('EXT_SUFFIX')
self.assertTrue(suffix.endswith('-darwin.so'), suffix)
+ def test_always_set_py_debug(self):
+ self.assertIn('Py_DEBUG', sysconfig.get_config_vars())
+ Py_DEBUG = sysconfig.get_config_var('Py_DEBUG')
+ self.assertIn(Py_DEBUG, (0, 1))
+ self.assertEqual(Py_DEBUG, support.Py_DEBUG)
+
+ def test_always_set_py_gil_disabled(self):
+ self.assertIn('Py_GIL_DISABLED', sysconfig.get_config_vars())
+ Py_GIL_DISABLED = sysconfig.get_config_var('Py_GIL_DISABLED')
+ self.assertIn(Py_GIL_DISABLED, (0, 1))
+ self.assertEqual(Py_GIL_DISABLED, support.Py_GIL_DISABLED)
+
+ def test_abiflags(self):
+ # If this test fails on some platforms, maintainers should update the
+ # test to make it pass, rather than changing the definition of ABIFLAGS.
+ self.assertIn('abiflags', sysconfig.get_config_vars())
+ self.assertIn('ABIFLAGS', sysconfig.get_config_vars())
+ abiflags = sysconfig.get_config_var('abiflags')
+ ABIFLAGS = sysconfig.get_config_var('ABIFLAGS')
+ self.assertIsInstance(abiflags, str)
+ self.assertIsInstance(ABIFLAGS, str)
+ self.assertIn(abiflags, ABIFLAGS)
+ if os.name == 'nt':
+ self.assertEqual(abiflags, '')
+
+ if not sys.platform.startswith('win'):
+ valid_abiflags = ('', 't', 'd', 'td')
+ else:
+ # Windows uses '_d' rather than 'd'; see also test_abi_debug below
+ valid_abiflags = ('', 't', '_d', 't_d')
+
+ self.assertIn(ABIFLAGS, valid_abiflags)
+
+ def test_abi_debug(self):
+ ABIFLAGS = sysconfig.get_config_var('ABIFLAGS')
+ if support.Py_DEBUG:
+ self.assertIn('d', ABIFLAGS)
+ else:
+ self.assertNotIn('d', ABIFLAGS)
+
+ # The 'd' flag should always be the last one on Windows.
+ # On Windows, the debug flag is used differently with a underscore prefix.
+ # For example, `python{X}.{Y}td` on Unix and `python{X}.{Y}t_d.exe` on Windows.
+ if support.Py_DEBUG and sys.platform.startswith('win'):
+ self.assertEndsWith(ABIFLAGS, '_d')
+
+ def test_abi_thread(self):
+ abi_thread = sysconfig.get_config_var('abi_thread')
+ ABIFLAGS = sysconfig.get_config_var('ABIFLAGS')
+ self.assertIsInstance(abi_thread, str)
+ if support.Py_GIL_DISABLED:
+ self.assertEqual(abi_thread, 't')
+ self.assertIn('t', ABIFLAGS)
+ else:
+ self.assertEqual(abi_thread, '')
+ self.assertNotIn('t', ABIFLAGS)
+
@requires_subprocess()
def test_makefile_overwrites_config_vars(self):
script = textwrap.dedent("""
diff --git a/Misc/ACKS b/Misc/ACKS
index 814a530f7b79d4..c3e8530d5b36c2 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1402,6 +1402,7 @@ Todd R. Palmer
Juan David Ibáñez Palomar
Nicola Palumbo
Jan Palus
+Xuehai Pan
Yongzhi Pan
Martin Panter
Mathias Panzenböck
diff --git a/Misc/NEWS.d/next/Windows/2025-03-27-16-22-58.gh-issue-127405.aASs2Z.rst b/Misc/NEWS.d/next/Windows/2025-03-27-16-22-58.gh-issue-127405.aASs2Z.rst
new file mode 100644
index 00000000000000..a6d5985ff4c7b8
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2025-03-27-16-22-58.gh-issue-127405.aASs2Z.rst
@@ -0,0 +1 @@
+Add ``ABIFLAGS`` to :func:`sysconfig.get_config_vars` on Windows. Patch by Xuehai Pan.
diff --git a/Modules/_sysconfig.c b/Modules/_sysconfig.c
index c50c5cfabc2f1f..e2d141b5910b6d 100644
--- a/Modules/_sysconfig.c
+++ b/Modules/_sysconfig.c
@@ -67,6 +67,16 @@ _sysconfig_config_vars_impl(PyObject *module)
return NULL;
}
+#ifdef Py_DEBUG
+ PyObject *py_debug = _PyLong_GetOne();
+#else
+ PyObject *py_debug = _PyLong_GetZero();
+#endif
+ if (PyDict_SetItemString(config, "Py_DEBUG", py_debug) < 0) {
+ Py_DECREF(config);
+ return NULL;
+ }
+
return config;
}