[Hackage] #944: Duplicate C symbol names

Hackage cvs-ghc at haskell.org
Sun Apr 22 15:07:54 CEST 2012

#944: Duplicate C symbol names
  Reporter:  PaulVanDerWalt  |        Owner:        
      Type:  defect          |       Status:  new   
  Priority:  normal          |    Milestone:        
 Component:  Cabal library   |      Version:  1.14.0
  Severity:  normal          |     Keywords:        
Difficulty:  unknown         |   Ghcversion:  7.2.2 
  Platform:  Mac OS          |  
 I've run into a problem where I want to include the vty and haskeline
 packages, which both contain the same C code, of which the symbol names
 are not translated or made unique. When I use both packages, and try to
 compile something which has Template Haskell (which triggers loading of
 all dependencies), I get the following error.

 GHCi runtime linker: fatal error: I found a duplicate definition for
 whilst processing object file

 A workaround is to patch the libraries to make the function names unique,
 but this is less than ideal.

Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/944>
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