gh-149879: Fix multiprocessing resource tracker tests on Cygwin (#150440)

Skip test_resource_tracker_sigterm() if signal.pthread_sigmask() is
missing.

diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index f044358dcbd40f9bc4606a8436e279ba6a412db1..115a187a8a858824a500b2c614a3e79fee734e23 100644 (file)
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -6310,6 +6310,8 @@ class TestResourceTracker(unittest.TestCase):
         # Catchable signal (ignored by semaphore tracker)
         self.check_resource_tracker_death(signal.SIGINT, False)
 
+    @unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
+                         'need signal.pthread_sigmask')
     def test_resource_tracker_sigterm(self):
         # Catchable signal (ignored by semaphore tracker)
         self.check_resource_tracker_death(signal.SIGTERM, False)