[GHC] #10728: Add e.g. "-N<=4" in addition to the fixed "-N4" and variable "-N" RTS options

[GHC]

#10728: Add e.g. "-N<=4" in addition to the fixed "-N4" and variable "-N" RTS
options
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        Reporter:  rrnewton          |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  7.10.2
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9221, #8224      |  Differential Rev(s):  Phab:D1650
       Wiki Page:                    |
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Changes (by thomie):

 * status:  patch => new
 * owner:  MarcelineVQ =>


Comment:

 MarcelineVQ: please hold off from implementing `-Ndiv` and `-Nsub` till
 this syntax discussion has subsided.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10728#comment:14>
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