[GHC] #10442: Loading of shared libraries is problematic in ghc 7.10.1

[GHC]

#10442: Loading of shared libraries is problematic in ghc 7.10.1
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        Reporter:  artella.coding    |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  high              |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:  fixed             |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Runtime crash     |  (amd64)
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by rwbarton):

 Ah I see how I was confused about this ticket earlier. I was imagining
 that `Main` was loaded from an object file and then I didn't understand
 why the error was with finding `add` rather than `testAdd`.

 Now I agree the behavior described in this ticket makes sense and that
 setting an rpath when building the shared library is a logical solution.

 Running `cabal repl` with `--ghc-option=-fobject-code` does fail with
 {{{
 Preprocessing executable 'illustrate' for illustrate-0.1.0.0...
 GHCi, version 7.10.1: http://www.haskell.org/ghc/  :? for help
 Ok, modules loaded: Main.
 Prelude Main> main
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.10.1 for x86_64-unknown-linux):
         Loading temp shared object failed: /tmp/ghc4059_0/libghc4059_2.so:
 undefined symbol: testAdd
 }}}
 which is bad (it would link correctly with ghc, so it should just work
 under ghci), but that's #10458.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10442#comment:11>
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