Finding the machine CPU arch

[Joshua Root]

On 2013-3-7 01:59 , Vincent Habchi wrote:
> Le 6 mars 2013 à 15:52, Joshua Root <jmr at macports.org> a écrit :
> 
>> Well, build_arch tells you what kind of processor the user wants you to
>> build for. In general you can't assume that the CPU you're building on
>> is the one that you will run on.
> 
> I agree; but I want to apply the ‘-march=native’ flag when ${build_arch} and the actual arch match, so as to provide more optimization.

You can probably find out with sysctl if you really need to. (It's a Tcl
proc wrapping sysctlbyname(3), no need to shell out.)

- Josh