[GHC] #11499: Loading temp shared object failed in GHCi

[GHC]

#11499: Loading temp shared object failed in GHCi
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        Reporter:  alfa07            |                Owner:  trommler
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  7.10.3
      Resolution:                    |             Keywords:  dynamic
                                     |  linking
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHCi crash        |            Test Case:
      Blocked By:  11238             |             Blocking:
 Related Tickets:  #10458            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by trommler):

 * owner:   => trommler


Comment:

 Replying to [comment:9 trommler]:
 > I can reproduce the issue on Linux with a GHC that has the #10458 patch:
 >
 > {{{
 > GHCi, version 7.10.3: http://www.haskell.org/ghc/  :? for help
 > ghc: panic! (the 'impossible' happened)
 >   (GHC version 7.10.3 for x86_64-unknown-linux):
 >         Loading temp shared object failed: /tmp/ghc29316_0/libghc_25.so:
 undefined symbol: tt_driver_class
 > }}}
 >
 > I see a different symbol missing but the missing symbol should come from
 `freetype2`, too.
 >
 > Redesign of dynamic linking should fix this. So marking as blocked on
 that ticket.
 I think I understand what is going on. The undefined symbols are provided
 by a package that is loaded at startup. Because we need to load
 (`dlopen`)with `RTLD_LOCAL` those symbols are not available in the
 temporary shared object.

 This will be fixed with the new design proposed in #11238.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11499#comment:10>
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