port only builds with build_arch=i386 on command line -- any way to specify that in the portfile?

[Joshua Root]

On 2016-9-3 06:11 , Ken Cunningham wrote:
>>
>>
>> This is ludicrous. GCC 4.0 is a decade old.
>>
>
>
> Oh, way better news.
>
> BasiliskII builds and runs, including the JIT, with clang-3.7 at least,
> when it's held to i386 arch.
>
> Apparently nobody has been able to do that before, assuming Dr. Google
> is correct.
>
> Built with arch x86_64 it runs (fairly quickly) without the JIT, but
> enabling the JIT crashes it (no surprise).
>
> That will make the portfile much much easier to finish.

Sounds like a jit variant which sets supported_archs may be in order 
then. That way users on x86_64 systems can decide whether they want to 
lose the JIT or rebuild all the dependencies with +universal.

- Josh