[MacPorts] #19739: ghc: uses happy during configure

[MacPorts]

#19739: ghc: uses happy during configure
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 Reporter:  ryandesign@…             |       Owner:  gwright@…           
     Type:  defect                   |      Status:  new                 
 Priority:  Normal                   |   Milestone:                      
Component:  ports                    |     Version:  1.7.1               
 Keywords:                           |        Port:  ghc                 
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 While configuring ghc @6.10.3_1 I got the [ticket:19737 happy error from
 #19737]. This points out a problem: ghc should not be using happy at
 configure time, because ghc does not declare a dependency on happy. There
 is no way ghc could declare a dependency on happy, since happy declares a
 dependency on ghc, and circular dependencies are not allowed.

 I was able to work around this by deactivating happy before trying to
 install ghc, but ghc should be fixed so this is not necessary.

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Ticket URL: <http://trac.macports.org/ticket/19739>
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