-fdump-translation-unit considered harmful

[Dams, Dennis (Dennis)]

 > Zack Weinberg <zack@codesourcery.com> writes:
 > 
 > [...]
 > 
 > | Me ranting about -fdump-translation-unit had nothing to do with your
 > | problem, really, it's just that your message reminded me that I was
 > | going to bring that up.
 > 
 > I think -fdump-translation-unit should remain.  I thereby volunteer to
 > take any question about it.  
 > 
 > -- Gaby

Gaby,

I'm trying to use the -fdump-translation-unit option (gcc (GCC) 4.1.0 20050505 (experimental)), but it does not seem to do anything. What's the right way to use it - should I specify any additional switches/options?
thanks,
--Dennis.