[GHC] #9074: GHC 7.8.2's ghci does not track missing symbols when loading non-Haskell object files

[GHC]

#9074: GHC 7.8.2's ghci does not track missing symbols when loading non-Haskell
object files
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       Reporter:  massysett         |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.8.2
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 I have a package that bundles in C library sources.  I never had a problem
 with this when using GHC 7.6.

 In GHC 7.8, the order of the c-sources in the cabal file now matters.
 Sources must be listed earlier if they have symbols that subsequently
 loaded object files will need.  If the c-sources are in the wrong order,
 when running "cabal repl" I get

 Loading object (static) dist/build/decnumber/src/decQuad.o ... ghc: panic!
 (the 'impossible' happened)
   (GHC version 7.8.2 for x86_64-unknown-linux):
         Loading temp shared object failed: /tmp/ghc14294_0/ghc14294_1.so:
 undefined symbol: DECSTICKYTAB

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 When using the same code and cabal file with GHC 7.6, "cabal repl" works
 fine: GHCi loads each static object (regardless of ordering in the cabal
 file), links up the necessary symbols, and launches successfully.

 Haskell Cafe discussion here:

 http://www.haskell.org/pipermail/haskell-cafe/2014-May/114041.html

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9074>
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