Skip signal handler re-installation if it is not necessary. Issue 8354.
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index bb7e4b0..b1ee890 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -198,7 +198,12 @@
return;
}
#endif
+#ifndef HAVE_SIGACTION
+ /* If the handler was not set up with sigaction, reinstall it. See
+ * Python/pythonrun.c for the implementation of PyOS_setsig which
+ * makes this true. See also issue8354. */
PyOS_setsig(sig_num, signal_handler);
+#endif
}