[GHC] #12052: Split ghc-boot so we have better dependency hygiene

[GHC]

#12052: Split ghc-boot so we have better dependency hygiene
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        Reporter:  ezyang            |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Core Libraries    |              Version:  8.0.1-rc4
      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 simonpj):

 I like the direction of travel here, but I do beg for a wiki page or
 clearly-signposted summary somewhere that explains

 * What packages there are
 * What they contain
 * Crucially, what the thinking behind the architecture is

 For example, summarising what is in `ghc-boot-th`, ''and what criteria
 guided that choice''.  Similarly `ghc-prim`.  Etc.

 There is some stuff already

 * [wiki:Repositories]
 * [wiki:Commentary/Libraries]

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12052#comment:4>
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