Which -march option to use for a generic 64-bit cpu?

[Jonathan Wakely]

On 21 January 2012 15:33, Jonathan Wakely wrote:
>> - Do options indicating such a generic 64-bit cpu exist?, or
>
> Why do you think you need to use any -march option?
> If do don't use one you'll get code that runs on any x86_64 machine.

That was meant to say "if you don't use..."

>> - Can I specifiy multiple -march options in one compile command?, or
>
> No.

Technically you can, but only the last one will have any effect.