[GHC] #9218: Upgrade the version of MinGW shipped with GHC

[GHC]

#9218: Upgrade the version of MinGW shipped with GHC
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              Reporter:  komadori    |            Owner:  komadori
                  Type:  task        |           Status:  new
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Build       |          Version:  7.8.2
  System                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:  Windows     |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:  #3390
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by RyanGlScott):

 GHC's out-of-date version of MinGW-w64 currently prevents me from
 developing a Windows version of [https://github.com/RyanGlScott/bluetooth
 Bluetooth libraries for Haskell]. GHC's version of MinGW-w64 (2.0)
 [http://comments.gmane.org/gmane.comp.gnu.mingw.w64.general/10121 doesn't
 pack the necessary Bluetooth structs correctly], whereas the current
 version (3.1) does. Attempting to link against the most recent MinGW-w64's
 libraries results in problems as well, since the Bluetooth-related headers
 have changed substantially (e.g., the
 [http://sourceforge.net/p/mingw-w64/bugs/355/ NS_BTH macro] was
 introduced), and compilation often results in
 [https://ghc.haskell.org/trac/ghc/ticket/7056 this issue] (usually with
 {{{cabal repl}}}).

 In addition, the Bluetooth functionality is not available on MinGW, only
 on MinGW-w64, so switching to minGW-w64 for both Windows architectures
 would allow me to develop for 32-bit Windows as well.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9218#comment:4>
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