[GHC] #7639: Fix installation issues with cross compiling + honour Stage1Only properly

[GHC]

#7639: Fix installation issues with cross compiling + honour Stage1Only properly
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    Reporter:  StephenBlackheath  |       Owner:                       
        Type:  bug                |      Status:  patch                
    Priority:  normal             |   Milestone:                       
   Component:  Compiler           |     Version:  7.7                  
    Keywords:                     |          Os:  Unknown/Multiple     
Architecture:  Unknown/Multiple   |     Failure:  Installing GHC failed
  Difficulty:  Unknown            |    Testcase:                       
   Blockedby:                     |    Blocking:  7610                 
     Related:                     |  
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Changes (by simonmar):

  * difficulty:  => Unknown


Comment:

 Ok, a fix for the `ghc-pkg` issue is coming (I didn't understand the fix,
 so spent some time looking at it, and I think I've done it in a slightly
 cleaner way).

 Regarding the stage 2 issue, strictly speaking building `compiler/stage2`
 is correct, because it is the `ghc` package that can be used with the
 cross-compiler.  If you don't want to build it, then setting `stage = 1`
 in your `mk/build.mk` should disable it.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7639#comment:5>
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