[GHC] #12738: GHC drops -optl flags

[GHC]

#12738: GHC drops -optl flags
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        Reporter:  niteria           |                Owner:
            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 simonmar):

 * cc: Phyx- (added)


Comment:

 I'm suspicious of this:
 https://phabricator.haskell.org/diffusion/GHC/browse/master/compiler/main/SysTools.hs;02f2f21ce4a9969406cf1772dc5955a97386777a$918-933

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12738#comment:1>
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