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

[GHC]

#1405: Make ghc (stage1) be compilable by non-GHC
-----------------------------+----------------------------------------------
    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       |  
-----------------------------+----------------------------------------------
Old description:

> This depends a bit on the existence of a good-enough non-GHC compiler.
> Possibility to do recursively dependent modules (I think) presently rules
> out everything except JHC, which is not entirely working yet.  Also
> pattern guards might need to be implemented in that compiler.  Maybe for
> testing, a ghc that doesn't define __GLASGOW_HASKELL__ (and doesn't use
> ghc-specific flags ??) could be used too.
>
> See http://thread.gmane.org/gmane.comp.lang.haskell.cvs.ghc/20962 ... GHC
> also uses things like IORefs, (unsafeCoerce? only in stage2 I think) that
> everyone provides, but would still be good to document.
>
> I'm working on this now, we'll see how far I get --Isaac

New description:

 This depends a bit on the existence of a good-enough non-GHC compiler.
 Possibility to do recursively dependent modules (I think) presently rules
 out everything except JHC, which is not entirely working yet.  Also
 pattern guards might need to be implemented in that compiler.  Maybe for
 testing, a ghc that doesn't define __GLASGOW_HASKELL__ (and doesn't use
 ghc-specific flags ?? possibly a wrapper script of some sort) could be
 used too.

 See http://thread.gmane.org/gmane.comp.lang.haskell.cvs.ghc/20962 ... GHC
 also uses things like IORefs, (unsafeCoerce? only in stage2 I think) that
 everyone provides, but would still be good to document.

 I'm working on this now, we'll see how far I get --Isaac

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