[GHC] #7957: -ddump-minimal-imports should honour -outputdir

[GHC]

#7957: -ddump-minimal-imports should honour -outputdir
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        Reporter:  hvr               |            Owner:  hvr
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.0.4
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by hvr):

 * owner:   => hvr


Comment:

 The attached patch is an attempt at addressing this ticket in simple and
 pragmatic way by using the `-dumpdir` flag (if set) as base folder for the
 generated `.imports` files.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7957#comment:3>
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