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

[GHC]

#12771: GHCi incorrectly favors static libraries over import libraries
-----------------------------+----------------------------------------
        Reporter:  Phyx-     |                Owner:  Phyx-
            Type:  bug       |               Status:  patch
        Priority:  normal    |            Milestone:  8.2.1
       Component:  Compiler  |              Version:  8.0.1
      Resolution:            |             Keywords:
Operating System:  Windows   |         Architecture:  Unknown/Multiple
 Type of failure:  Other     |            Test Case:  T12771
      Blocked By:            |             Blocking:
 Related Tickets:            |  Differential Rev(s):  Phab:D2651
       Wiki Page:            |
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Comment (by Tamar Christina <tamar@…>):

 In [changeset:"795be0ea60fc81aefdaf6ecb1dc9b03c4a5c9f86/ghc" 795be0e/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="795be0ea60fc81aefdaf6ecb1dc9b03c4a5c9f86"
 Align GHCi's library search order more closely with LDs

 Summary:
 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
 ```

 Test Plan: ./validate

 Reviewers: RyanGlScott, austin, hvr, bgamari, erikd, simonmar

 Reviewed By: RyanGlScott

 Subscribers: thomie, #ghc_windows_task_force

 Differential Revision: https://phabricator.haskell.org/D2651

 GHC Trac Issues: #12771
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12771#comment:4>
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