[GHC] #9101: Build 7.8.2 from sources on Windows/msys2

[GHC]

#9101: Build 7.8.2 from sources on Windows/msys2
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       Reporter:  cchantep          |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.8.2
       Keywords:                    |  Operating System:  Windows
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 Hi,

 Trying to build GHC 7.8.2 from sources on Windows 7, from msys2 shell,
 required binaries such as gcc, ld, ar are forced to those in inplace
 directories (windows-extra), even system/env provide such tools (e.g.
 using pacman package manager in msys2):
 https://ghc.haskell.org/trac/ghc/browser/ghc/configure.ac#L274 .

 It leads to issues as tools in inplace are quite old.

 Particularly it can be critical about linking: GHC will be working with
 old ld, but you can have built/linked libraries using the more recent ld.
 Then, what's built using system tool can't be used throught GHC (ld
 version conflict).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9101>
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