[GHC] #6077: Respect XDG_CONFIG_HOME

[GHC]

#6077: Respect XDG_CONFIG_HOME
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        Reporter:  So8res            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  None              |              Version:  7.4.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:  5966              |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by siddhanathan):

 The GHCi configuration file would clearly be in
 `$XDG_CONFIG_HOME/ghc/ghci.conf`.

 Where exactly the GHCi history should be placed is debatable.
 [https://wiki.debian.org/XDGBaseDirectorySpecification Debian] argues for
 an additional state directory. But for now, I think
 `$XDG_DATA_HOME/ghc/ghci_history` would be best.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6077#comment:5>
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