[MacPorts] #52582: ghc @7.8.3_4: RTS incompatibility with Sierra

[MacPorts]

#52582: ghc @7.8.3_4: RTS incompatibility with Sierra
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  Reporter:  shanemikel  |      Owner:  neverpanic
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:  sierra haspatch
      Port:  ghc         |
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Comment (by shanemikel):

 Replying to [comment:11 murrayE]:
 > ghc still not compatible with macOS Sierra (10.12.1): configures but
 does not build.

 The particular RTS problem addressed by this issue has been fixed, so I
 think this should be closed.  The rest of the problems are related to
 linking, so I think a new thread should be opened for "GHC linking problem
 on Sierra" or something like that.  In any case, it does look like those
 issues have been fixed, but getting them into a build may be a little
 tricky.  For one, we need to make sure to pick the correct revision for
 the GHC repo (which should be in the 8.0.2 branch, but I'm not sure yet),
 and also, the Cabal submodule has to include another revision.  Again, I'm
 not sure if the GHC head has updated the submodule to include that patch
 yet, or not.  Finally, having the right source is only half the problem,
 as GHC is self-hosting; that is, we need a working GHC to build GHC.  I'm
 not sure the best way to go about this, but I would start with either
 building the new sources on El Capitan, or trying to figure out cross-
 building on Linux.

 I haven't actually done this before, so it could take me a little time to
 figure it out.  If you want to give it a go, you can find some information
 here: https://ghc.haskell.org/trac/ghc/wiki/Building.  Specifically the
 page about cross-compiling mentions the possibility of cross-building
 (targeting a different OS, as opposed to a different architecture).

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Ticket URL: <https://trac.macports.org/ticket/52582#comment:12>
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