[GHC] #9941: How do I install GHC 7.8.1 and assign it a different command?

[GHC]

#9941: How do I install GHC 7.8.1 and assign it a different command?
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              Reporter:              |             Owner:
  derekbarnes361                     |            Status:  new
                  Type:  bug         |         Milestone:
              Priority:  lowest      |           Version:  7.8.4
             Component:  Compiler    |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 I would like to install GHC 7.8.1, but would like to assign it different
 commands, so as not to clash with 7.6.3. For example:

 runghc with runghc7.8.1
 ghci with ghci7.8.1
 etc...
 Or similar. (ghci would be most important, for typed holes.) Basically, I
 want to be able to use GHC 7.8 and 7.6, so if there is a more direct way
 to do this tell me (A-B problem.)

 Note: Ubuntu 13.10
 Send From : https://www.smore.com/v6vm-penomet-hydro-pump

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9941>
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