RE: randconfig build error with next-20140909, in drivers/net/ethernet/broadcom/cnic.c

[Anish Bhatt]

This is caused by c99d667e8527  ("cnic : Cleanup CONFIG_IPV6 & VLAN check")

So I'm not really sure what the fix for this is. CNIC will properly only support 
[m] or [n] when IPV6 is compiled as a module, but if you set SCSI_BNX2X_FCOE or 
SCSI_BNX2_ISCSI to be in built, there is a 'select CNIC' that forces CNIC to be 
inbuilt, even though this is not supported by Kconfig. I was under the 
assumption that select will not forcibly change m to inbuilt (or perhaps I'm 
missing some syntax suboption ?)

This is still fixable in SCSI_BNX2_ISCSI using the same logic used in the above 
mentioned commit, but not so in SCSI_BNX2X_FCOE where it causes a recursive 
dependency error (thought it is fixing the issue nevertheless), and none of the 
 other solutions I tried seemed to work either.

Looking at previous code, the earlier approach used to just disable ipv6 code 
in such a situation.
-Anish

________________________________________
From: Jim Davis [jim.epost@xxxxxxxxx]
Sent: Tuesday, September 09, 2014 7:38 AM
To: Stephen Rothwell; linux-next; linux-kernel; Anish Bhatt; mchan@xxxxxxxxxxxx; David S. Miller; netdev
Subject: randconfig build error with next-20140909, in drivers/net/ethernet/broadcom/cnic.c

Building with the attached random configuration file,

drivers/built-in.o: In function `cnic_get_v6_route':
cnic.c:(.text+0x3a4168): undefined reference to `ip6_route_output'
make: *** [vmlinux] Error 1
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