Massimiliano Culpo ed582cef68 New interface for passing build information among specs (#1875) ... - Added a new interface for Specs to pass build information - Calls forwarded from Spec to Package are now explicit - Added descriptor within Spec to manage forwarding - Added state in Spec to maintain query information - Modified a few packages (the one involved in spack install pexsi) to showcase changes - This uses an object wrapper to `spec` to implement the `libs` sub-calls. - wrapper is returned from `__getitem__` only if spec is concrete - allows packagers to access build information easily		2017-03-02 10:01:29 -08:00
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spack	New interface for passing build information among specs (#1875)	2017-03-02 10:01:29 -08:00