Skip the entire Apple system logging configuration if os-log isn't av…

…ailable.

Python/pylifecycle.c

@@ -50,7 +50,7 @@
 #  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;
-#  if defined(TARGET_OS_IPHONE) && TARGET_IOS_IPHONE
+#  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
@@ -94,7 +94,7 @@ static PyStatus init_sys_streams(PyThreadState *tstate);
 #ifdef __ANDROID__
 static PyStatus init_android_streams(PyThreadState *tstate);
 #endif
-#if defined(__APPLE__)
+#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
 static PyStatus init_apple_streams(PyThreadState *tstate);
 #endif
 static void wait_for_thread_shutdown(PyThreadState *tstate);
@@ -1279,7 +1279,7 @@ init_interp_main(PyThreadState *tstate)
         return status;
     }
 #endif
-#if defined(__APPLE__)
+#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
     if (config->use_system_logger) {
         status = init_apple_streams(tstate);
         if (_PyStatus_EXCEPTION(status)) {
@@ -2963,7 +2963,7 @@ init_android_streams(PyThreadState *tstate)
 
 #endif  // __ANDROID__
 
-#if defined(__APPLE__)
+#if defined(__APPLE__) && HAS_APPLE_SYSTEM_LOG
 
 static PyObject *
 apple_log_write_impl(PyObject *self, PyObject *args)
@@ -2974,14 +2974,9 @@ apple_log_write_impl(PyObject *self, PyObject *args)
         return NULL;
     }
 
-    // Call the underlying Apple logging API. The os_log unified logging APIs
-    // were introduced in macOS 10.12, iOS 10.0, tvOS 10.0, and watchOS 3.0;
-    // this call is a no-op on older versions.
-    #if HAS_APPLE_SYSTEM_LOG
     // Pass the user-provided text through explicit %s formatting
     // to avoid % literals being interpreted as a formatting directive.
     os_log_with_type(OS_LOG_DEFAULT, logtype, "%s", text);
-    #endif
     Py_RETURN_NONE;
 }
 
@@ -3016,7 +3011,6 @@ init_apple_streams(PyThreadState *tstate)
     if (result == NULL) {
         goto error;
     }
-
     goto done;
 
 error:
@@ -3030,7 +3024,7 @@ init_apple_streams(PyThreadState *tstate)
     return status;
 }
 
-#endif  // __APPLE__
+#endif  // __APPLE__ && HAS_APPLE_SYSTEM_LOG
 
 
 static void