avr-gcc assembler output question

Hi,

This is probably FAQ, but I can't seem to find it.  Is there a way to
make gcc (avr-gcc in particular) to output C source as comments
interleaved with the assembler output?  I see several options
controlling what goes into the assembler output file, but I can't seem
to make the actual C source line that corresponds to the generated
assembler be included.  I understand that with optimization turned on,
the actual generated assembly may not closely match the C source any
longer, but without optimization it should be pretty accurate.

Thanks!
-Brian
-- 
Brian Dean, [email protected]
BDMICRO - Maker of the MAVRIC ATmega128 Dev Board
http://www.bdmicro.com/