[GHC] #9777: -msse flag could be handled better by the driver

[GHC]

#9777: -msse flag could be handled better by the driver
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              Reporter:  jstolarek   |            Owner:  dredozubov
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Driver      |          Version:  7.9
            Resolution:              |         Keywords:  newcomer
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Moderate (less
       Type of failure:  Other       |  than a day)
             Test Case:              |       Blocked By:
              Blocking:              |  Related Tickets:  #8404
Differential Revisions:  Phab:D504   |
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Changes (by dredozubov):

 * differential:  Phab:D497 => Phab:D504


Comment:

 Thanks for fast feedback!

 I've updated the code to build on your suggestions. Completely agree on
 "multiple -msse flags" point. It's completely reasonable to choose last
 version if multiple flags are provided by user. I feel like there's no
 need to leave VersionSuffix OptKind constructor(and code related to it),
 because there will be no application for it - it was commited and used
 only to support msse flags.

 I'd gladly supply some tests if i haven't been extremely frustrated how to
 do this. Any pointers on this matter will be greatly appreciated.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9777#comment:8>
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