[GHC] #4268: Warning for ANN pragmas when GHCi is not supported

[GHC]

#4268: Warning for ANN pragmas when GHCi is not supported
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        Reporter:  simonmar    |            Owner:
            Type:  bug         |           Status:  new
        Priority:  high        |        Milestone:  7.8.1
       Component:  Compiler    |          Version:  7.0.4
      Resolution:              |         Keywords:
Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple             |       Difficulty:  Easy (less than 1 hour)
 Type of failure:  Other       |       Blocked By:
       Test Case:              |  Related Tickets:
        Blocking:              |
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Comment (by simonmar):

 Thanks for the pointer to #8312, but I don't see where it says that
 annotations will require a flag, could you help me out?

 Yes, I think it should be a warning, not an error.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4268#comment:13>
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