[MacPorts] #37375: hs-haddock @2.5.0 Depends on old ghc

[MacPorts]

#37375: hs-haddock @2.5.0 Depends on old ghc
-------------------------+----------------------
  Reporter:  tal@…       |      Owner:  cal@…
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.1.2
Resolution:              |   Keywords:
      Port:  hs-haddock  |
-------------------------+----------------------

Comment (by cal@…):

 The `ghc` port already installs a binary named `haddock`, specifically in
 `$prefix/bin/haddock`:

 {{{
 :) clemens at cschlepptop:[..]/dports/devel/hs-haddock$ port contents ghc |
 grep haddock$ | head -n2
   /opt/local/bin/haddock
   /opt/local/lib/ghc-7.6.3/haddock
 }}}

 I wonder whether the `hs-haddock` port is even needed at all because of
 this. Can you advise?

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Ticket URL: <https://trac.macports.org/ticket/37375#comment:4>
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