#8420: Spurious dynamic library dependencies ------------------------------------+--------------------------------- Reporter: AndreasVoellmy | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: MacOS X Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+--------------------------------- It should be possible to have an executable A that depends on dynamic library B which in turn depends on dynamic library C, without A directly depending on C. {{{ A --> B --> C }}} Unfortunately, GHC 7.6.3 does not seem to allow this. Instead it copies the dependencies of B to dependencies of A, so that we get {{{ A -> B,C and B --> C }}} This is unfortunately, because running A will cause the loader to locate C based on the rpaths (assuming we are using rpaths to locate dynamic libraries), whereas only B should know how to get to C from B. The problem seems to be that ghc copies all the library dependencies of B (presumably from the package specification of B) as library dependencies of the A. I verified the problem in GHC 7.6.3, but haven't tried in HEAD yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8420 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler