[GHC] #1405: Make ghc (stage1) be compilable by non-GHC

[GHC]

#1405: Make ghc (stage1) be compilable by non-GHC
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    Reporter:  Isaac Dupree  |        Owner:         
        Type:  task          |       Status:  new    
    Priority:  normal        |    Milestone:  _|_    
   Component:  Compiler      |      Version:  6.6.1  
    Severity:  normal        |   Resolution:         
    Keywords:                |   Difficulty:  Unknown
          Os:  Unknown       |     Testcase:         
Architecture:  Unknown       |  
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Comment (by Isaac Dupree):

 Yes, certainly, I think it's ghc-5.04 currently.  Is there an easy way to
 get a copy of that version of ghc (or other versions between that and the
 current) to test with?  Or should I just rely on my intuition while
 watching for buildbots breaking that use old versions of ghc?

 I think it's okay if GHC is merely slower when compiled with older
 versions of GHC (since normally you'll be using recent GHC for
 development, and stage2, anyway), for example if older versions of GHC
 optimized worse or didn't implement UNPACK pragma...

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1405>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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