From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: IPV6_PKTINFO socket option
Date: Wed, 08 Aug 2007 15:02:48 -0700 (PDT)
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From: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Date: Wed, 8 Aug 2007 12:16:51 +0100

>  2. On sparc64 with the same kernel IPV6_PKTINFO works without problems, even pulls
>     out the cmsg fields correctly. Conversely, when trying to set the IPV6_RECVPKTINFO
>     sticky option on the socket, no cmsg fields are generated. 
>     The kernel is of the same date and revision as the i386 kernel - library issue ???
>     It is very annoying, since the application needs to run on both architectures.

Almost certainly a compat layer bug in the kernel, it would
affect 32-bit applications on powerpc64 and similar if so.