From efff2a52af58da05bb21351d47662e19079acb7c Mon Sep 17 00:00:00 2001
From: Michael Graff <mgraff@isc.org>
Date: Fri, 10 Dec 1999 16:51:39 +0000
Subject: [PATCH] Make this compile (without ipv6 socket support) on half-done
 implementations.

---
 lib/isc/unix/socket.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/isc/unix/socket.c b/lib/isc/unix/socket.c
index b232625770..6d7908e282 100644
--- a/lib/isc/unix/socket.c
+++ b/lib/isc/unix/socket.c
@@ -130,10 +130,20 @@ typedef isc_event_t intev_t;
 #define TIMESTAMP_SPACE	0
 #endif
 
+/*
+ * Check to see if we have even basic support for cracking messages from
+ * the control data returned from/sent via recvmsg()/sendmsg().
+ */
+#if defined(USE_CMSG) && (!defined(CMSG_LEN) || !defined(CMSG_SPACE))
+#undef USE_CMSG
+#endif
+
 /*
  * Total cmsg space needed for all of the above bits.
  */
+#ifdef USE_CMSG
 #define TOTAL_SPACE	(PKTINFO_SPACE + TIMESTAMP_SPACE)
+#endif
 
 struct isc_socket {
 	/* Not locked. */