[gentoo-user] Build for Athlon and Ryzen architectures

[ralfconn]

Hello,

my 8-year old gentoo HTPC is giving clear signals that the motherboard 
is about to die so I ordered new components.

The dying box is an AMD FX-6530 built with -march=native. The new box 
will be Ryzen 7 5800X.

I'd like to rebuild the dying boxwith some more generic -march option so 
that I'll be able to boot into the new box and then rebuild it with more 
optimized -march.

If I understand well the GCC man page the safest option for the dying 
system rebuild would be -march=x86_64 (and maybe -mtune=generic?). Is 
this right?

thanks,

raffaele