[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:  normal            |            Milestone:  8.0.1
       Component:  Runtime System    |              Version:  6.13
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:  7535
 Related Tickets:  #9839             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmar):

 I'd prefer not to add a dependency on an external tool if possible.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4243#comment:21>
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