[GHC] #10726: Upgrade MingW-w64 distributions for windows

[GHC]

#10726: Upgrade MingW-w64 distributions for windows
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        Reporter:  Phyx-             |                Owner:  Phyx-
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  7.10.3
       Component:  Build System      |              Version:  7.11
      Resolution:  fixed             |             Keywords:
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9218 #9014       |  Differential Rev(s):  Phab:D1123
  #10435                             |
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Comment (by bgamari):

 I've spoken to Phyx- about this issue. It seems there may be compelling
 reasons to merge (and thomie agrees),

  * The current GCC contains a bug where it can’t call itself recursively
 with response files: this means that Michael Snoyman’s response file patch
 (#8596) is essentially useless without a newer toolchain
  * The upgrade enables programs to run on Windows Server. As Phyx- said in
 `#ghc`,
    > since starting with Server 2008 SEHOP is enabled by default and the
 32bit version of GHC (which was using a very old mingw GCC) did not
 correctly handle the exceptions. So windows would block the executable
  * Phyx- also said,
    > under the misc category we get a lot of different bug fixes for
 binutils. But I am not aware of any specific reported issues reported.

 Perhaps we could try merging and rope some Windows users into thorough
 testing pre-release?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10726#comment:26>
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