ENV to macports

[Joshua Root]

Tim Lee wrote:
> Does building +universal (setting universal_target to 10.4 & setting universal_sysroot to a 10.4 sdk) properly select Darwin 8 variants? Or does this have the same issue with selecting Darwin 9 variants?

No and yes respectively, because platform variants contain a mix of
stuff that is needed to build on that platform and stuff that is needed
to run on that platform. The variants are selected based on the platform
being built on, and the universal variant just uses the ostrich algorithm.

- Josh