[GHC] #15988: Remove Text.Printf and System.Console.GetOpt from base

[GHC]

#15988: Remove Text.Printf and System.Console.GetOpt from base
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        Reporter:  andrewthad        |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.6.3
       Component:  Compiler          |              Version:  8.6.2
      Resolution:                    |             Keywords:
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 andrewthad):

 Sorry, I didn't explain that part clearly. I mean using cabal-the-
 library's module reexport feature (1) (not GHC's module reexport feature).
 In the cabal file for the `getopt` library, we would have something like
 this:

 {{{
 library
   default-language: Haskell2010
   if impl(ghc < 8.8)
     build-depends: base >= 4.5 (or whenever the module was originally
 introduced)
     reexported-modules: System.Console.GetOpt
   else
     hs-source-dirs: src
     exported-modules: System.Console.GetOpt
 }}}

 So now on old GHCs, the module really is exported by both libraries, but
 cabal (or maybe GHC) understands that these are the same module.

 (1) https://ghc.haskell.org/trac/ghc/wiki/ModuleReexports

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15988#comment:2>
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