[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:
        Blocking:                    |  Related Tickets:
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Comment (by nh2):

 Replying to [comment:31 parcs]:
 > nh2: That's an interesting idea. We would just have to persist the
 timing information somehow (through the interface file maybe)

 I don't think the interface file is a good place: I tried to build/improve
 Haskell build systems in the last months and interface files not being
 generated the same for identical inputs was always a problem (e.g. in
 http://ghc.haskell.org/trac/ghc/ticket/8144). Probably making an own file
 for that will work as well.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/910#comment:33>
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