2016-06-16  John David Anglin  <danglin@gcc.gnu.org>

	[BZ 20243]
	* resolv/arpa/nameser_compat.h (HEADER): Use attribute packed.

diff --git a/resolv/arpa/nameser_compat.h b/resolv/arpa/nameser_compat.h
index d59c9e4..6c0f69c 100644
--- a/resolv/arpa/nameser_compat.h
+++ b/resolv/arpa/nameser_compat.h
@@ -80,7 +80,7 @@ typedef struct {
 	unsigned	ancount :16;	/*%< number of answer entries */
 	unsigned	nscount :16;	/*%< number of authority entries */
 	unsigned	arcount :16;	/*%< number of resource entries */
-} HEADER;
+} __attribute__ ((packed)) HEADER;
 
 #define PACKETSZ	NS_PACKETSZ
 #define MAXDNAME	NS_MAXDNAME