[GHC] #14483: getExecutablePath from System.Environment in base should follow symlinks properly.

[GHC]

#14483: getExecutablePath from System.Environment in base should follow symlinks
properly.
-------------------------------------+-------------------------------------
        Reporter:  angerman          |                Owner:  alpmestan
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.3
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  D4227
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Tamar Christina <tamar@…>):

 In [changeset:"c523525b0e434d848f6e47ea3f9a37485965fa79/ghc" c523525/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c523525b0e434d848f6e47ea3f9a37485965fa79"
 ghc, ghc-pkg: use getExecutablePath on Windows when base >= 4.11.0

 Summary:
 This completes the work started in D4227 by using just 'getExecutablePath'
 in ghc and ghc-pkg when building with base >= 4.11.0.

 On the long term, we will be able to simply kill the existing code that
 follows (or not) symlinks and just get this behaviour for free from
 getExecutable. For now we however have to require base >= 4.11.0 to be
 able
 to just use getExecutablePath under Windows, and use the current code when
 building with an older base.

 Original code by @alpmestan commandeering since patch has been stale
 and bug remains open.

 Test Plan: Validate

 Reviewers: angerman, bgamari, erikd, alpmestan

 Reviewed By: bgamari

 Subscribers: carter, rwbarton, thomie

 GHC Trac Issues: #14483

 Differential Revision: https://phabricator.haskell.org/D4229
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14483#comment:8>
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