[GHC] #13315: Compile broken on new MSYS2

[GHC]

#13315: Compile broken on new MSYS2
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        Reporter:  Phyx-             |                Owner:  (none)
            Type:  bug               |               Status:  upstream
        Priority:  high              |            Milestone:
       Component:  Build System      |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Windows           |         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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Changes (by Phyx-):

 * status:  new => upstream


Comment:

 https://github.com/Alexpux/MSYS2-packages/issues/822

 The solution above is only partial. pipes are still affected by this
 change in behaviour and there's no way to correct those without inserting
 `dos2unix` calls between the pipes.

 This is a non-starter. The above changes are enough to build GHC again,
 just seems not enough to be able to run `nofib`.

 The best solution is for the `MSYS2` project to revert these `Cygwin`
 patches in the distro. As they're not the expected behaviour for Windows.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13315#comment:3>
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