[GHC] #8949: switch -msse2 to be on by default

[GHC]

#8949: switch -msse2 to be on by default
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        Reporter:  errge             |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.9
  (CodeGen)                          |         Keywords:
      Resolution:                    |     Architecture:  x86
Operating System:  Unknown/Multiple  |       Difficulty:  Moderate (less
 Type of failure:  Other             |  than a day)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by tibbe):

 I think we should, like LLVM, switch on -march=native by default and have
 people who want to build more portable binaries specify their target
 explicitly. This doesn't preclude turning on -msse2 by default of course.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8949#comment:2>
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