[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  
---------------------------------+------------------------------------------

Comment(by duncan):

 Note that it is not unique to Gtk2Hs's build system. Cabal has direct
 support for `pkg-config` and also uses all the include directories it
 supplies.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4104#comment:1>
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