--- /dev/null
+--- radvd-1.2/radvd.h 2008-01-24 12:10:18.000000000 +0200
++++ radvd-1.2.mod/radvd.h 2009-01-17 22:10:52.000000000 +0200
+@@ -235,4 +235,34 @@
+ int privsep_interface_reachtime(const char *iface, uint32_t rtime);
+ int privsep_interface_retranstimer(const char *iface, uint32_t rettimer);
+
++/*
++ * compat hacks in case libc and kernel get out of sync:
++ *
++ * glibc 2.4 and uClibc 0.9.29 introduce IPV6_RECVPKTINFO etc. and change IPV6_PKTINFO
++ * This is only supported in Linux kernel >= 2.6.14
++ *
++ * This is only an approximation because the kernel version that libc was compiled against
++ * could be older or newer than the one being run. But this should not be a problem --
++ * we just keep using the old kernel interface.
++ *
++ * these are placed here because they're needed in all of socket.c, recv.c and send.c
++ */
++#ifdef __linux__
++# if defined IPV6_RECVHOPLIMIT || defined IPV6_RECVPKTINFO
++# include <linux/version.h>
++# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
++# if defined IPV6_RECVHOPLIMIT && defined IPV6_2292HOPLIMIT
++# undef IPV6_RECVHOPLIMIT
++# define IPV6_RECVHOPLIMIT IPV6_2292HOPLIMIT
++# endif
++# if defined IPV6_RECVPKTINFO && defined IPV6_2292PKTINFO
++# undef IPV6_RECVPKTINFO
++# undef IPV6_PKTINFO
++# define IPV6_RECVPKTINFO IPV6_2292PKTINFO
++# define IPV6_PKTINFO IPV6_2292PKTINFO
++# endif
++# endif
++# endif
++#endif
++
+ #endif