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

[GHC]

#4496: add a configure build option to use system libffi for Linux
---------------------------------+------------------------------------------
    Reporter:  juhpetersen       |        Owner:              
        Type:  feature request   |       Status:  new         
    Priority:  normal            |    Milestone:  7.4.1       
   Component:  Build System      |      Version:  7.1         
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Linux             |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------
Changes (by juhpetersen):

  * version:  7.0.1 => 7.1
  * type:  bug => feature request


Comment:

 The current patch for ghc-7.0.4 to use system libffi in Debian and Fedora
 looks like this:
 http://pkgs.fedoraproject.org/gitweb/?p=ghc.git;a=blob;f=ghc-use-system-
 libffi.patch

 (The patch needs reformatting for 7.2.1: I can attach a newer patch,
 but anyway I think the current form needs more work if this is going to be
 build option.)

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4496#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler