[GHC] #4243: Make a proper options parser for the RTS

[GHC]

#4243: Make a proper options parser for the RTS
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    Reporter:  igloo             |        Owner:              
        Type:  task              |       Status:  new         
    Priority:  high              |    Milestone:  7.2.1       
   Component:  Runtime System    |      Version:  6.13        
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by igloo):

 See also #3910.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4243#comment:3>
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