[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:  7.12.1
       Component:  Runtime System    |                 Version:  6.13
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:  #9839             |                Blocking:
                                     |  Differential Revisions:
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Comment (by carlostome):

 Maybe we should change {{{rts/RtsFlags.c}}} to make use of <getopt.h>
 because now the option parser is a bit scaring. I think I can do it
 myself. Any suggestions?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4243#comment:11>
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