[GHC] #4496: add a configure build option to use system libffi for Linux

[GHC]

#4496: add a configure build option to use system libffi for Linux
------------------------------+---------------------------------------------
  Reporter:  juhpetersen      |          Owner:                  
      Type:  feature request  |         Status:  closed          
  Priority:  normal           |      Milestone:  7.6.2           
 Component:  Build System     |        Version:  7.1             
Resolution:  duplicate        |       Keywords:                  
        Os:  Linux            |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown     |     Difficulty:  Unknown         
  Testcase:                   |      Blockedby:                  
  Blocking:                   |        Related:                  
------------------------------+---------------------------------------------
Changes (by igloo):

  * status:  new => closed
  * resolution:  => duplicate


Comment:

 Closing in favour of #5743

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4496#comment:9>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler