This is patch
[ 559250 ] more POSIX signal stuff
Adds support (and docs and tests and autoconfery) for posix signal
mask handling -- sigpending, sigprocmask and sigsuspend.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 8e96db2..c8fa5af 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -383,6 +383,9 @@
/* Define to 1 if you have the <signal.h> header file. */
#undef HAVE_SIGNAL_H
+/* Define to 1 if you have the `sigprocmask' function. */
+#undef HAVE_SIGPROCMASK
+
/* Define to 1 if you have the `sigrelse' function. */
#undef HAVE_SIGRELSE