Mk/bsd.openssl.mk optimization

[Kris Kennaway]

Dirk Meyer wrote:
> Kris Kennaway schrieb:,
> 
>>> The result can be cached only if no other ports or package is installed.
>>> So you are right that make index could be otimized,
>>> but it will take much more work.
>> Why can't you cache it in bsd.port.subdir.mk as I suggested?
> 
> openssl does set NOPRECIOUSMAKEVARS=yes,
> so that part ist skipped in bsd.port.subdir.mk.

OK, but why is this necessary?

Kris