IPV6 build failure 2.6.20-git1x

[Sid Boyce <g3vbv@blueyonder.co.uk>]

x86_64 builds without errors on openSUSE 10.2.
x86 on openSUSE 10.3 Alpha1
 gcc version 4.1.2 20070115 (prerelease) (SUSE Linux)
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
# CONFIG_IPV6_MIP6 is not set
CONFIG_IPV6_SIT=m
# CONFIG_IPV6_TUNNEL is not set
CONFIG_IPV6_MULTIPLE_TABLES=y
# CONFIG_IPV6_SUBTREES is not set
CONFIG_IP6_NF_MATCH_IPV6HEADER=m

  LD      arch/i386/lib/built-in.o
  CC      arch/i386/lib/bitops.o
  AS      arch/i386/lib/checksum.o
  CC      arch/i386/lib/delay.o
  AS      arch/i386/lib/getuser.o
  CC      arch/i386/lib/memcpy.o
  CC      arch/i386/lib/mmx.o
  AS      arch/i386/lib/putuser.o
  AS      arch/i386/lib/semaphore.o
  CC      arch/i386/lib/strstr.o
  CC      arch/i386/lib/usercopy.o
  AR      arch/i386/lib/lib.a
  GEN     .version
  CHK     include/linux/compile.h
  UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
net/built-in.o: In function `svc_udp_recvfrom':
svcsock.c:(.text+0x91f9c): undefined reference to `__ipv6_addr_type'
make: *** [.tmp_vmlinux1] Error 1
:/usr/src/linux-2.6.20-git15

Regards
Sid.

-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks