[GHC] #10566: Move "package key" generation to GHC

[GHC]

#10566: Move "package key" generation to GHC
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        Reporter:  ezyang            |                   Owner:  ezyang
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Package system    |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by simonpj):

 Sounds good in general terms.  But up to now GHC has been primary a
 module-at-a-time compiler. To compute a package key it needs to know all
 about a package.  Do you intend to do this by giving it a Backpack file
 describing the package? Or what?

 And how does Cabal get to know what key GHC computed?

 More detail required!

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10566#comment:1>
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