[GHC] #2464: Allow #ifdef'd pragmas

[GHC]

#2464: Allow #ifdef'd pragmas
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    Reporter:  ajd               |        Owner:  simonmar                  
        Type:  bug               |       Status:  assigned                  
    Priority:  normal            |    Milestone:  6.14.1                    
   Component:  Driver            |      Version:  6.8.2                     
    Keywords:                    |   Difficulty:  Moderate (less than a day)
          Os:  Unknown/Multiple  |     Testcase:                            
Architecture:  Unknown/Multiple  |      Failure:  GHC rejects valid program 
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Comment(by simonmar):

 Fixed:

 {{{
 Fri Jan 29 03:40:50 PST 2010  Simon Marlow <marlowsd at gmail.com>
   * Re-read pragmas after preprocessing (#2464, #3674, #3457)
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2464#comment:6>
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