[GHC] #9176: GHC not generating dyn_hi files

[GHC]

#9176: GHC not generating dyn_hi files
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              Reporter:  heatsink    |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
            Resolution:              |         Keywords:  dynamic
      Operating System:              |     Architecture:  x86_64 (amd64)
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Other       |       Blocked By:
             Test Case:              |  Related Tickets:
              Blocking:              |
Differential Revisions:              |
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Comment (by heatsink):

 Replying to [comment:9 thomie]:

 Thanks for reproducing this bug.  That looks like what I experienced,
 except for the package not installing with HEAD.  The "Bad interface file"
 message looks like it's refusing to install a package with inconsistent
 ABI hashes, which may be an improvement.

 I don't think anyone has worked out what properties are intended to hold
 for interface files, such as whether having mismatched ABI hashes is
 allowed.  I brought this up on the mailing and got replies about a few use
 cases that should be supported.  I's not clear to me what this means for
 the implementation.
 https://www.haskell.org/pipermail/ghc-devs/2014-June/005301.html
 https://www.haskell.org/pipermail/ghc-devs/2014-July/005475.html

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9176#comment:10>
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