[GHC] #11788: Enable Thin Library support for the Runtime linker on Windows.

4 Apr 2016

      #11788: Enable Thin Library support for the Runtime linker on Windows.
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           Reporter:  Phyx-          |             Owner:  Phyx-
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:  8.2.1
          Component:  Runtime        |           Version:  7.10.3
  System (Linker)                    |
           Keywords:                 |  Operating System:  Windows
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 The runtime linker currently has an `#ifdef` that removes support for AR's
 thin archives for Windows.

 This because all the code is based on `char*` and Windows would require
 `wchar_t`.

 Using the abstraction of `pathchar` this can be enabled for Windows and
 remove another `#ifdef` from the RTS.

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11788
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