[MacPorts] #20132: ghc missing variable definitions in 10.6

[MacPorts]

#20132: ghc missing variable definitions in 10.6
------------------------------+---------------------------------------------
 Reporter:  snc@…             |       Owner:  gwright@…           
     Type:  defect            |      Status:  new                 
 Priority:  Normal            |   Milestone:                      
Component:  ports             |     Version:  1.7.1               
 Keywords:                    |        Port:  ghc                 
------------------------------+---------------------------------------------
 The portfile only defines variables in the post-patch for various versions
 of the OS.  However, 10.6 (darwin 10) isn't defined yet, so building of
 this port cannot occur yet.

 {{{
 --->  Applying patches to ghc
 Error: Target org.macports.patch returned: can't read "ghc_bootversion":
 no such variable
 Error: The following dependencies failed to build: ghc
 Error: Status 1 encountered during processing.
 }}}

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Ticket URL: <http://trac.macports.org/ticket/20132>
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