[GHC] #9005: Ship default bash completion file with ghc

[GHC]

#9005: Ship default bash completion file with ghc
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       Reporter:  td123             |             Owner:
           Type:  feature request   |            Status:  new
       Priority:  lowest            |         Milestone:
      Component:  None              |           Version:  7.8.2
       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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 Now that ticket #7843 has been closed, it would be great to ship a default
 implementation of a bash completion file for ghc.

 Since there isn't a standard location to install completion files across
 distros, it might be good to have an optional flag during configure to
 specify a location and if one is specified, install the bash completion
 file into that location.

 The following links provide implementations that have worked for me:

 http://www.reddit.com/r/haskell/comments/236qkb/autocomplete_command_line_options_with_ghc_78/

 https://ghc.haskell.org/trac/ghc/wiki/AutocompleteGHCFlags

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9005>
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The Glasgow Haskell Compiler