OpenJDK 8 + lambdas build for OS X

[Brian Goetz]

> My understanding is that lambdas are currently a separate hg forest
> (to allow the lambdas team to go faster), and that the team will be
> bringing code across from lambdas into jdk8 mainline, and then
> rebaselining.
> 
> So it may not be possible to build a combined jdk8 + lambdas at the
> moment. (Brian, please correct me if I'm wrong).

Not trivially.

But, the changes in the lambda forest are almost exclusively to the compiler and adding new library classes; we pull from jdk8 to lambda regularly.  No Hotspot changes, or changes to existing libraries.  So such a merge should be quite practical.