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

[GHC]

#9218: Upgrade the version of MinGW shipped with GHC
-------------------------------------+-------------------------------------
        Reporter:  komadori          |                   Owner:  gintas
            Type:  task              |                  Status:  patch
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Build System      |                 Version:  7.8.2
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:  9014              |                Blocking:  9215
 Related Tickets:  #3390             |  Differential Revisions:  Phab:D339
-------------------------------------+-------------------------------------

Comment (by thomie):

 Status update. Nobody is working on this at the moment. GHC sees very
 little Windows volunteers in general.

 The unfinished patch in Phab:D339 does (too) many things:
   - use [http://mingw-w64.org MinGW-w64] instead of [http://www.mingw.org/
 mingw] for 32-bit Windows also.

   - linker changes needed to go with that, mostly from awson's patch in
 comment:12

   - change the provider of the
 [http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/
 32bit] and
 [http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/
 64bit] packages from rubenvb to mingw-builds. By default this results in
 much [https://phabricator.haskell.org/D339#25977 larger] downloads (2x for
 64bit, 5x for 32bit), which means #9014 should be fixed first.

   - remove all Perl dependencies, which means it's waiting for #9832.

   - downloads mingw during `./configure` step, instead of via explicit
 `git clone ...ghc-tarballs.git`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9218#comment:22>
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