[GHC] #12053: Mode for ghc --make which only compiles the files I pass on command line

[GHC]

#12053: Mode for ghc --make which only compiles the files I pass on command line
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        Reporter:  ezyang            |                Owner:  ezyang
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mgsloan):

 Something like this would indeed be handy!  The linker errors people get
 when the module isn't in their cabal file can be scary / uninformative.

 FYI, the approach that stack takes here is to use `-ddump-hi` and identify
 when there are modules / etc unmentioned in the cabal file.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12053#comment:1>
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