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It would help if you simply tried your example under 2.1 -- 
I don't have your system, and can't try it for you.  It's 
extraordinarily risky making any last-second change to a 
bugfix release, and whether it's an old bug feeds into the 
tradeoff calculation.

Enabling -lieee at the last second isn't something I'll do 
without lots of people swearing it doesn't hurt anything on 
their boxes.  Not all systems act the same way in the 
presence of -lieee.  The change I did make is in our C 
code, where I have a good chance of guessing what various C 
compilers will do; -lieee does whatever a platform feels 
like doing, and there's no standard to constrain it.