[GHC] #1877: Change the meaning of -fextended-default-rules

[GHC]

#1877: Change the meaning of -fextended-default-rules
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 Reporter:  simonmar  |          Owner:             
     Type:  task      |         Status:  new        
 Priority:  normal    |      Milestone:  6.10 branch
Component:  GHCi      |        Version:  6.8.1      
 Severity:  normal    |     Resolution:             
 Keywords:            |     Difficulty:  Easy (1 hr)
 Testcase:            |   Architecture:  Unknown    
       Os:  Unknown   |  
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Comment (by igloo):

 OK, thanks for pointing that out, sorear. It sounds like we need 2 flags
 then: One to control behaviour for code typed at the GHCi prompt, and one
 for the behaviour for code from files. In which case we should leave the
 existing flag with its current meaning and add one to control the
 behaviour for code typed at the GHCi prompt.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1877#comment:3>
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