[MacPorts] #25558: ghc: update to latest version

[MacPorts]

#25558: ghc: update to latest version
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 Reporter:  jwiegley@…          |       Owner:  macports-tickets@…                   
     Type:  update              |      Status:  assigned                             
 Priority:  Normal              |   Milestone:                                       
Component:  ports               |     Version:                                       
 Keywords:                      |        Port:  ghc ghc-devel                        
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Comment(by cal@…):

 I just
  - Copied the current state of the ghc port to `hs-platform-ghc` (r96876)
  - Added (automatic) upgrade path for users of `haskell-platform` by
 deactivating `ghc` (r96880)
  - Changed `haskell-platform` to depend on `hs-platform-ghc` rather than
 `ghc` (r96881)

 You didn't provide a copy of `ghc7040.patch` and the upstream one does not
 apply correctly in MacPorts (try: `port -d patch ghc`).

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Ticket URL: <https://trac.macports.org/ticket/25558#comment:80>
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