[GHC] #12771: GHCi incorrectly favors static libraries over import libraries

[GHC]

#12771: GHCi incorrectly favors static libraries over import libraries
----------------------------------------+----------------------------
           Reporter:  Phyx-             |             Owner:
               Type:  bug               |            Status:  new
           Priority:  normal            |         Milestone:  8.2.1
          Component:  Compiler          |           Version:  8.0.1
           Keywords:                    |  Operating System:  Windows
       Architecture:  Unknown/Multiple  |   Type of failure:  Other
          Test Case:                    |        Blocked By:
           Blocking:                    |   Related Tickets:
Differential Rev(s):                    |         Wiki Page:
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 Given a static library and an import library in the same folder. e.g.

 {{{
 libfoo.a
 libfoo.dll.a
 }}}

 running `ghci -lfoo` we should prefer the import library `libfoo.dll.a`
 over `libfoo.a` because we prefer having to just load the DLL. and not
 having to do any linking.

 This also more closely emulated the behaviour of LD, which has a search
 order of

 {{{
 libxxx.dll.a
 xxx.dll.a
 libxxx.a
 cygxxx.dll (*)
 libxxx.dll
 xxx.dll
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12771>
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