(usagi-users 03159) IPv6 over IPv4 tunneling when IPv6 is configured as a module

[Tushar Gohad <tgohad@xxxxxxxxxx>]

Kernel build fails when IPv6 over IPv4 tunneling option is built
into the kernel and IPv6 is configured as a module.

Error Log:

net/network.o(.text+0x50092): In function `ipip_tunnel_xmit':
: undefined reference to `icmpv6_send'
net/network.o(.data+0x4180): undefined reference to `ipip6_rcv'
net/network.o(.data+0x4184): undefined reference to `ipip6_err'
make: *** [vmlinux] Error 1


net/ipv4/Config.in should use dep_tristate directive in place of
bool for CONFIG_NET_IPIP_IPV6 option to make sure tunneling is
built as a module when IPv6 is a module.

Suggested fix:


--- net/ipv4/Config.in  13 Nov 2003 00:29:09 -0000      1.3
+++ net/ipv4/Config.in  13 Dec 2004 21:34:26 -0000
@@ -28,9 +28,7 @@
fi
tristate '  IP: tunneling' CONFIG_NET_IPIP
if [ "$CONFIG_NET_IPIP" = "y" ]; then
-   if [ "$CONFIG_IPV6" != "n" ]; then
-      bool '    IP: IPv6 over IPv4 tunneling support (replaces sitXX 
devices)' CONFIG_NET_IPIP_IPV6
-   fi
+   dep_tristate '    IP: IPv6 over IPv4 tunneling support (replaces 
sitXX devices)' CONFIG_NET_IPIP_IPV6 $CONFIG_IPV6
fi
tristate '  IP: GRE tunnels over IP' CONFIG_NET_IPGRE
if [ "$CONFIG_IP_MULTICAST" = "y" ]; then


- Tushar