[GHC] #4900: Consider usage files in the GHCi recompilation check

[GHC]

#4900: Consider usage files in the GHCi recompilation check
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        Reporter:  cdsmith           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  TH_Depends
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Wizek):

 I'm also interested in this. Here is my current use-case detailed:
 https://stackoverflow.com/questions/53569080/how-to-most-easily-break-up-a
 -large-haskell-file-with-lots-of-imports-many-qual

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4900#comment:83>
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