[GHC] #4104: ghc-pkg refuses to register packages if some include directories don't exist

[GHC]

#4104: ghc-pkg refuses to register packages if some include directories don't
exist
---------------------------------+------------------------------------------
    Reporter:  mux               |       Owner:                
        Type:  bug               |      Status:  new           
    Priority:  normal            |   Component:  Package system
     Version:  6.12.2            |    Keywords:                
          Os:  Unknown/Multiple  |    Testcase:                
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown  
---------------------------------+------------------------------------------
 When registering a package, ghc-pkg fails with an error if any of the
 include directories do not exist.  This is fine in general, but causes
 installation failures with gtk2hs.  This is because the gtk2hs build tools
 will add all the directories given by "pkg-config --cflags gtk+-2.0",
 which typically contains lots of redundant and possibly non-existent
 directories, depending on your operating system.

 Maybe ghc-pkg should just warn instead?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4104>
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