[GHC] #12997: Build broken on OpenBSD

[GHC]

#12997: Build broken on OpenBSD
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.2-rc2
      Resolution:                    |             Keywords:
Operating System:  OpenBSD           |         Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by hvr):

 When trying to build GHC 8.0.2rc2 on AIX, I ran into

 {{{
  gcc: error: unrecognized command line option '-Wl-optl-Wl,-bnotextro'
 }}}

 when the build was trying to build `hsc2hs` early on. @slyfox suggested
 cherry-picking a6657bd0d6b9949098021d89ed3cd8a943bdd3b6, which I did, and
 it fixed that issue for me.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12997#comment:6>
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