[GHC] #8123: GHCi warns about -eventlog even though it's sometimes necessary

[GHC]

#8123: GHCi warns about -eventlog even though it's sometimes necessary
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       Reporter:  akio   |             Owner:
           Type:  bug    |            Status:  new
       Priority:         |         Milestone:
  normal                 |           Version:  7.6.3
      Component:  GHCi   |  Operating System:  Linux
       Keywords:         |   Type of failure:  Incorrect warning at
   Architecture:         |  compile-time
  x86_64 (amd64)         |         Test Case:
     Difficulty:         |          Blocking:
  Unknown                |
     Blocked By:         |
Related Tickets:         |
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 If I invoke GHCi as {{{ghci -eventlog}}}, it says: {{{Warning: -debug,
 -threaded and -ticky are ignored by GHCi}}}. However, the flag does make a
 difference, in that GHCi will be able to load object files that were
 compiled using {{{-eventlog}}}. For this reason, I don't think
 {{{-eventlog}}} should trigger the warning.

 Also runghc has the same issue.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8123>
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