[GHC] #7152: Add flag to configure that skips overwriting of symlinks on install

[GHC]

#7152: Add flag to configure that skips overwriting of symlinks on install
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    Reporter:  tibbe             |       Owner:                  
        Type:  bug               |      Status:  new             
    Priority:  high              |   Milestone:  7.8.1           
   Component:  Build System      |     Version:  7.4.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by liyang):

 * cc: hackage.haskell.org@… (added)


Comment:

 I install different versions to /usr/local/ghc/ghc-x.y.z and have a bunch
 of bash functions/aliases that prepend the selected version to $PATH &c.

 If we're going to allow multiple versioned binaries to be installed
 directly to /usr (which would be nice), we'll want some way to choose
 between them too, cf. gcc_select on OS X, in which case we should also
 figure out how that'd interact with say Debian's update-alternatives(8).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7152#comment:2>
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