This patch comes from in-house, was submitted upstream, and has been
accepted.  When version 8.15 comes out, it will no longer be needed.

--- sendmail-8.14.9/libmilter/signal.c~	2014-05-16 13:40:15.000000000 -0700
+++ sendmail-8.14.9/libmilter/signal.c	2014-12-04 12:51:02.970365415 -0800
@@ -104,11 +104,11 @@
 	for (;;)
 	{
 		sigerr = sig = 0;
-#if defined(SOLARIS) || defined(__svr5__)
+#if defined(__svr5__)
 		if ((sig = sigwait(&set)) < 0)
-#else /* defined(SOLARIS) || defined(__svr5__) */
+#else /* defined(__svr5__) */
 		if ((sigerr = sigwait(&set, &sig)) != 0)
-#endif /* defined(SOLARIS) || defined(__svr5__) */
+#endif /* defined(__svr5__) */
 		{
 			/* some OS return -1 and set errno: copy it */
 			if (sigerr <= 0)