[MacPorts] #48899: ghc & haskell-platform update?

[MacPorts]

#48899: ghc & haskell-platform update?
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  Reporter:  J.Gilbey@…            |      Owner:  neverpanic
      Type:  update                |     Status:  assigned
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:
Resolution:                        |   Keywords:
      Port:  haskell-platform ghc  |
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Comment (by mojca):

 Any pull requests or volunteers to bring Haskell up to date again are more
 than welcome.

 I talked on their IRC channel a few days ago. What they would like to see
 is, say, the latest three versions available in parallel (similar to what
 we offer with python / perl / ruby). I did some testing, but there is
 quite a bunch of stuff that needs work in order to bring even a single one
 up to date, plus everything that follows with respect to individual
 packages that all need an update as well.

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Ticket URL: <https://trac.macports.org/ticket/48899#comment:52>
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