Could you test if this works instead? http://folk.uio.no/hbf/ol-struct-hack-1.patch If that doesn't work, similar code elsewhere may be in danger.

This hack seems to work just fine. But I'd like to ask if it's the right way to do it - I mean, as you said the code isn't run that often, so there is no need to consider performance and I think my patch offers cleaner solution. If you are willing to use it, I will of course finish it so it is without flaws you mentioned.

If you are still interested in the additional information, I used glibc-2.10.90-23 and gcc-4.4.1-15 on x86_64 system (Intel Core2Quad).

Regards