[GHC] #12738: GHC drops -optl flags

[GHC]

#12738: GHC drops -optl flags
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        Reporter:  niteria           |                Owner:  niteria
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by niteria):

 * owner:   => niteria


Comment:

 I have a patch that retains `-Xlinker` flags, in the same way that
 8c1ceddd50158f79f9ff103f8f34be9856d4da1d does. I'm just crafting a test
 now.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12738#comment:3>
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