Compiling for AMD Turion 64

[Jure Repinc <jlp@xxxxxxxxxxxxx>]

I would like to know which compiler flags are optimal for compiling for 
AMD Turion 64 mobile processor. If they are different for 32 and 64 bit 
mode I would like to know the differences. For example If I get the mcpu 
right it should now be set to athlon-xp if compiling for 32-bit mode and 
athlon64 if compiling for 64 bit mode. Or are there some more specific 
settings for AMD Turion 64?

Also is there much difference in support for AMD Turion 64 in GCC 3.4.4 
and 4.0.2?

Thank in advance for all your answers and help!