[GHC] #8266: Dynamic linking on Mac

[GHC]

#8266: Dynamic linking on Mac
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        Reporter:  kazu-yamamoto            |            Owner:
            Type:  bug                      |           Status:  patch
        Priority:  highest                  |        Milestone:  7.8.1
       Component:  Build System             |          Version:  7.7
      Resolution:                           |         Keywords:
Operating System:  MacOS X                  |     Architecture:
 Type of failure:  GHC doesn't work at all  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by darchon):

 I've updated my patch so that executables built by ghc now get an rpath
 link to ghc's `topDir`: https://gist.github.com/christiaanb/6822676

 I think the behaviour on OS X and Linux is now almost the same:
   * Linux: multiple absolute rpath's to all the dependent package
 directories
   * OS X: single rpath; relative, rpath-referencing, locations for GHC-
 installed packages; absolute locations for user-installed packages

 Perhaps a future version of GHC could have an even more desirable
 situation on OS X:
   * two rpaths: user/cabal location and ghc location
   * All libraries locations are relative, rpath-referencing

 This would make distribution of a dynamically-linked OS X binary easier,
 as you would only need to add extra rpath(s) for the location of the
 dependent packages.
 This would require an update in Cabal however, as it needs to add the
 second rpath to the executable.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8266#comment:14>
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