https://github.com/python/cpython/commit/589f422d1bb5892ad0c14d2414abca1de1049767
commit: 589f422d1bb5892ad0c14d2414abca1de1049767
branch: 3.13
author: Russell Keith-Magee <russ...@keith-magee.com>
committer: freakboy3742 <russ...@keith-magee.com>
date: 2025-03-13T11:53:11+08:00
summary:
[3.13] gh-130940: Remove PyConfig.use_system_logger (#131129)
Removes ``PyConfig.use_system_logger``, resolving an ABI incompatibility
introduced in
3.13.2.
Changes the default behavior of iOS to *always* direct stdout/stderr to the
system log.
files:
A Misc/NEWS.d/next/Library/2025-03-12-11-53-32.gh-issue-130940.81K1Tg.rst
M Doc/c-api/init_config.rst
M Doc/using/ios.rst
M Include/cpython/initconfig.h
M Lib/test/test_apple.py
M Lib/test/test_embed.py
M Python/initconfig.c
M Python/pylifecycle.c
M iOS/testbed/iOSTestbedTests/iOSTestbedTests.m
diff --git a/Doc/c-api/init_config.rst b/Doc/c-api/init_config.rst
index cd78fe18e35d1c..612aa2aa711253 100644
--- a/Doc/c-api/init_config.rst
+++ b/Doc/c-api/init_config.rst
@@ -1271,17 +1271,6 @@ PyConfig
Default: ``1`` in Python config and ``0`` in isolated config.
- .. c:member:: int use_system_logger
-
- If non-zero, ``stdout`` and ``stderr`` will be redirected to the system
- log.
-
- Only available on macOS 10.12 and later, and on iOS.
-
- Default: ``0`` (don't use system log).
-
- .. versionadded:: 3.13.2
-
.. c:member:: int user_site_directory
If non-zero, add the user site directory to :data:`sys.path`.
diff --git a/Doc/using/ios.rst b/Doc/using/ios.rst
index aa43f75ec35a6c..dff694941d0aeb 100644
--- a/Doc/using/ios.rst
+++ b/Doc/using/ios.rst
@@ -296,8 +296,6 @@ To add Python to an iOS Xcode project:
* Buffered stdio (:c:member:`PyConfig.buffered_stdio`) is *disabled*;
* Writing bytecode (:c:member:`PyConfig.write_bytecode`) is *disabled*;
* Signal handlers (:c:member:`PyConfig.install_signal_handlers`) are
*enabled*;
- * System logging (:c:member:`PyConfig.use_system_logger`) is *enabled*
- (optional, but strongly recommended);
* ``PYTHONHOME`` for the interpreter is configured to point at the
``python`` subfolder of your app's bundle; and
* The ``PYTHONPATH`` for the interpreter includes:
diff --git a/Include/cpython/initconfig.h b/Include/cpython/initconfig.h
index 20f5c9ad9bb9a8..5da5ef9e5431b1 100644
--- a/Include/cpython/initconfig.h
+++ b/Include/cpython/initconfig.h
@@ -179,9 +179,6 @@ typedef struct PyConfig {
int use_frozen_modules;
int safe_path;
int int_max_str_digits;
-#ifdef __APPLE__
- int use_system_logger;
-#endif
int cpu_count;
#ifdef Py_GIL_DISABLED
diff --git a/Lib/test/test_apple.py b/Lib/test/test_apple.py
index ab5296afad1d3f..f14db75e2f21fd 100644
--- a/Lib/test/test_apple.py
+++ b/Lib/test/test_apple.py
@@ -1,10 +1,10 @@
import unittest
from _apple_support import SystemLog
-from test.support import is_apple
+from test.support import is_apple_mobile
from unittest.mock import Mock, call
-if not is_apple:
- raise unittest.SkipTest("Apple-specific")
+if not is_apple_mobile:
+ raise unittest.SkipTest("iOS-specific")
# Test redirection of stdout and stderr to the Apple system log.
diff --git a/Lib/test/test_embed.py b/Lib/test/test_embed.py
index ed459794952581..a354f856c8057d 100644
--- a/Lib/test/test_embed.py
+++ b/Lib/test/test_embed.py
@@ -627,8 +627,6 @@ class InitConfigTests(EmbeddingTestsMixin,
unittest.TestCase):
CONFIG_COMPAT.update({
'legacy_windows_stdio': 0,
})
- if support.is_apple:
- CONFIG_COMPAT['use_system_logger'] = False
CONFIG_PYTHON = dict(CONFIG_COMPAT,
_config_init=API_PYTHON,
diff --git
a/Misc/NEWS.d/next/Library/2025-03-12-11-53-32.gh-issue-130940.81K1Tg.rst
b/Misc/NEWS.d/next/Library/2025-03-12-11-53-32.gh-issue-130940.81K1Tg.rst
new file mode 100644
index 00000000000000..366c057f5a1c05
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-12-11-53-32.gh-issue-130940.81K1Tg.rst
@@ -0,0 +1,4 @@
+The ``PyConfig.use_system_logger`` attribute, introduced in Python 3.13.2, has
+been removed. The introduction of this attribute inadvertently introduced an
+ABI breakage on macOS and iOS. The use of the system logger is now enabled
+by default on iOS, and disabled by default on macOS.
diff --git a/Python/initconfig.c b/Python/initconfig.c
index 9b446eccab9a57..8060a1647c0ebe 100644
--- a/Python/initconfig.c
+++ b/Python/initconfig.c
@@ -130,9 +130,6 @@ static const PyConfigSpec PYCONFIG_SPEC[] = {
#ifdef Py_DEBUG
SPEC(run_presite, WSTR_OPT),
#endif
-#ifdef __APPLE__
- SPEC(use_system_logger, BOOL),
-#endif
{NULL, 0, 0},
};
@@ -751,9 +748,6 @@ config_check_consistency(const PyConfig *config)
assert(config->cpu_count != 0);
// config->use_frozen_modules is initialized later
// by _PyConfig_InitImportConfig().
-#ifdef __APPLE__
- assert(config->use_system_logger >= 0);
-#endif
#ifdef Py_STATS
assert(config->_pystats >= 0);
#endif
@@ -856,9 +850,6 @@ _PyConfig_InitCompatConfig(PyConfig *config)
config->_is_python_build = 0;
config->code_debug_ranges = 1;
config->cpu_count = -1;
-#ifdef __APPLE__
- config->use_system_logger = 0;
-#endif
#ifdef Py_GIL_DISABLED
config->enable_gil = _PyConfig_GIL_DEFAULT;
#endif
@@ -887,9 +878,6 @@ config_init_defaults(PyConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_stdio = 0;
#endif
-#ifdef __APPLE__
- config->use_system_logger = 0;
-#endif
}
@@ -925,9 +913,6 @@ PyConfig_InitIsolatedConfig(PyConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_stdio = 0;
#endif
-#ifdef __APPLE__
- config->use_system_logger = 0;
-#endif
}
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index c96455e65aa3ba..a8852a88f94a37 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -47,20 +47,15 @@
# include <TargetConditionals.h>
# include <mach-o/loader.h>
// The os_log unified logging APIs were introduced in macOS 10.12, iOS 10.0,
-// tvOS 10.0, and watchOS 3.0;
+// tvOS 10.0, and watchOS 3.0; we enable the use of the system logger
+// automatically on non-macOS platforms.
# if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
-# define HAS_APPLE_SYSTEM_LOG 1
-# elif defined(TARGET_OS_OSX) && TARGET_OS_OSX
-# if defined(MAC_OS_X_VERSION_10_12) && MAC_OS_X_VERSION_MIN_REQUIRED >=
MAC_OS_X_VERSION_10_12
-# define HAS_APPLE_SYSTEM_LOG 1
-# else
-# define HAS_APPLE_SYSTEM_LOG 0
-# endif
+# define USE_APPLE_SYSTEM_LOG 1
# else
-# define HAS_APPLE_SYSTEM_LOG 0
+# define USE_APPLE_SYSTEM_LOG 0
# endif
-# if HAS_APPLE_SYSTEM_LOG
+# if USE_APPLE_SYSTEM_LOG
# include <os/log.h>
# endif
#endif
@@ -92,7 +87,7 @@ static PyStatus init_sys_streams(PyThreadState *tstate);
#ifdef __ANDROID__
static PyStatus init_android_streams(PyThreadState *tstate);
#endif
-#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
+#if defined(__APPLE__) && USE_APPLE_SYSTEM_LOG
static PyStatus init_apple_streams(PyThreadState *tstate);
#endif
static void wait_for_thread_shutdown(PyThreadState *tstate);
@@ -1280,12 +1275,10 @@ init_interp_main(PyThreadState *tstate)
return status;
}
#endif
-#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
- if (config->use_system_logger) {
- status = init_apple_streams(tstate);
- if (_PyStatus_EXCEPTION(status)) {
- return status;
- }
+#if defined(__APPLE__) && USE_APPLE_SYSTEM_LOG
+ status = init_apple_streams(tstate);
+ if (_PyStatus_EXCEPTION(status)) {
+ return status;
}
#endif
@@ -2971,7 +2964,7 @@ init_android_streams(PyThreadState *tstate)
#endif // __ANDROID__
-#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
+#if defined(__APPLE__) && USE_APPLE_SYSTEM_LOG
static PyObject *
apple_log_write_impl(PyObject *self, PyObject *args)
@@ -3032,7 +3025,7 @@ init_apple_streams(PyThreadState *tstate)
return status;
}
-#endif // __APPLE__ && HAS_APPLE_SYSTEM_LOG
+#endif // __APPLE__ && USE_APPLE_SYSTEM_LOG
static void
diff --git a/iOS/testbed/iOSTestbedTests/iOSTestbedTests.m
b/iOS/testbed/iOSTestbedTests/iOSTestbedTests.m
index dd6e76f9496fe0..d417b4cd63e2d4 100644
--- a/iOS/testbed/iOSTestbedTests/iOSTestbedTests.m
+++ b/iOS/testbed/iOSTestbedTests/iOSTestbedTests.m
@@ -53,8 +53,6 @@ - (void)testPython {
// Enforce UTF-8 encoding for stderr, stdout, file-system encoding and
locale.
// See https://docs.python.org/3/library/os.html#python-utf-8-mode.
preconfig.utf8_mode = 1;
- // Use the system logger for stdout/err
- config.use_system_logger = 1;
// Don't buffer stdio. We want output to appears in the log immediately
config.buffered_stdio = 0;
// Don't write bytecode; we can't modify the app bundle
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