[GHC] #15726: Don't include Haskeline (and others) in the global package DB

[GHC]

#15726: Don't include Haskeline (and others) in the global package DB
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        Reporter:  judah             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  8.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Indeed this sounds reasonable to me. The only possible issue is that it
 would also be no longer possible to link against the `ghci` library that
 ships with GHC (since it depends upon `haskeline`). However, I suspect
 this won't be a problem since GHC is more-or-less a normal Haskell package
 which `Cabal` should be able to install on its own.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15726#comment:1>
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