commit 1c1e3125206ef810dc7282023f6267a33b486233
Author: Carlos O'Donell <carlos@systemhalted.org>
Date:   Wed Jul 8 09:26:45 2015 -0400

    Add missing Advanced API (RFC3542) (1) defines.
    
    Fixes bug 18643.
    
    Defines IPV6_RECVPATHMTU, IPV6_PATHMTU, and IPV6_DONTFRAG for Linux.

diff --git a/sysdeps/unix/sysv/linux/bits/in.h b/sysdeps/unix/sysv/linux/bits/in.h
index f684736..887719f 100644
--- a/sysdeps/unix/sysv/linux/bits/in.h
+++ b/sysdeps/unix/sysv/linux/bits/in.h
@@ -184,6 +184,7 @@ struct in_pktinfo
 #define IPV6_IPSEC_POLICY	34
 #define IPV6_XFRM_POLICY	35
 
+/* Advanced API (RFC3542) (1).  */
 #define IPV6_RECVPKTINFO	49
 #define IPV6_PKTINFO		50
 #define IPV6_RECVHOPLIMIT	51
@@ -195,7 +196,11 @@ struct in_pktinfo
 #define IPV6_RTHDR		57
 #define IPV6_RECVDSTOPTS	58
 #define IPV6_DSTOPTS		59
+#define IPV6_RECVPATHMTU	60
+#define IPV6_PATHMTU		61
+#define IPV6_DONTFRAG		62
 
+/* Advanced API (RFC3542) (2).  */
 #define IPV6_RECVTCLASS		66
 #define IPV6_TCLASS		67