Recursive make speedup patch

[Kris Kennaway]

On Mon, Jan 26, 2004 at 01:22:31AM +0100, Oliver Eikemeier wrote:

> Create a bsd.ports.mk.cache that caches all variables that are unlikely
> to change (like PORTOBJFORMAT) saving at least some spawned processes?

PORTOBJFORMAT (and other variables assigned by !=) is already set once
in bsd.port.subdir.mk and passed down to the children.

Kris
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