[GHC] #14611: Support LIBRARY_PATH and LD_LIBRARY_PATH in rts

[GHC]

#14611: Support LIBRARY_PATH and LD_LIBRARY_PATH in rts
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        Reporter:  Phyx-             |                Owner:  Phyx-
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Runtime System    |              Version:  8.2.2
  (Linker)                           |
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  T14611
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4275
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"87917a594f37b70810013168a5df64d630620724/ghc"
 87917a59/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="87917a594f37b70810013168a5df64d630620724"
 Support LIBRARY_PATH and LD_LIBRARY_PATH in rts

 `LIBRARY_PATH` is used to find libraries and other link artifacts while
 `LD_LIBRARY_PATH` is used to find shared libraries by the loader.

 Due to an implementation detail on Windows, using `LIBRARY_PATH` will
 automatically add the path of any library found to the loader's path.

 So in that case `LD_LIBRARY_PATH` won't be needed.

 Test Plan:
 ./validate along with T14611 which has been made Windows only
 due to linux using the system linker/loader by default. So I feel a
 testcase there is unwarranted as the support is indirect via glibc.

 Reviewers: hvr, bgamari, erikd, simonmar, RyanGlScott

 Reviewed By: RyanGlScott

 Subscribers: RyanGlScott, rwbarton, thomie, carter

 GHC Trac Issues: #14611

 Differential Revision: https://phabricator.haskell.org/D4275
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14611#comment:3>
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