[GHC] #910: --make should have a -j flag for parallel building

[GHC]

#910: --make should have a -j flag for parallel building
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        Reporter:  igloo             |            Owner:
            Type:  feature request   |           Status:  patch
        Priority:  normal            |        Milestone:  _|_
       Component:  Compiler          |          Version:  6.4.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:  N/A               |       Blocked By:  8184, 8235
        Blocking:                    |  Related Tickets:
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Comment (by refold):

 @parcs

 Yes, I'm working on this, though I had some delays. One problem is that
 we've already released Cabal 1.18, so this feature will have to go into
 Cabal 1.19.

 Do I understand corectly that right now one must pass `+RTS -Nn` to GHC if
 one wants it to use `n` OS threads?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/910#comment:57>
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