[GHC] #4900: DEPENDS pragma

[GHC]

#4900: DEPENDS pragma
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              Reporter:  cdsmith     |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:  TH_Depends  |
              Blocking:              |
Differential Revisions:              |
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Comment (by refold):

 Docstring for `addDependentFile` should say that it looks at file content,
 not timestamp (unlike `ghc --make`). I just wasted some time wondering why
 `touch some/dependent/file && ghc --make` doesn't cause recompilation.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4900#comment:70>
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