[GHC] #8621: Pull request for inclusion in `unix' module of fsync(2), fdatasync(2), posix_fadvise(2) and posix_fallocate(2)

[GHC]

#8621: Pull request for inclusion in `unix' module of fsync(2), fdatasync(2),
posix_fadvise(2) and posix_fallocate(2)
-------------------------------+-------------------------------------------
        Reporter:              |            Owner:
  jimenezrick                  |           Status:  new
            Type:  task        |        Milestone:  7.10.1
        Priority:  normal      |          Version:  7.6.3
       Component:              |         Keywords:
  libraries/unix               |     Architecture:  Unknown/Multiple
      Resolution:              |       Difficulty:  Easy (less than 1 hour)
Operating System:  POSIX       |       Blocked By:
 Type of failure:              |  Related Tickets:
  None/Unknown                 |
       Test Case:              |
        Blocking:              |
-------------------------------+-------------------------------------------

Comment (by jimenezrick):

 All symbols are now conditionally exported.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8621#comment:2>
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