[GHC] #9237: GHC not recognizing "-llibrary" form in implicit linker scripts

[GHC]

#9237: GHC not recognizing "-llibrary" form in implicit linker scripts
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        Reporter:  mmikolajczyk        |            Owner:
            Type:  bug                 |           Status:  new
        Priority:  normal              |        Milestone:
       Component:  Compiler            |          Version:  7.8.2
      Resolution:                      |         Keywords:
Operating System:  Unknown/Multiple    |     Architecture:  x86_64 (amd64)
 Type of failure:  Compile-time crash  |       Difficulty:  Unknown
       Test Case:                      |       Blocked By:
        Blocking:                      |  Related Tickets:
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Comment (by rwbarton):

 I think GHC is trying to load `/usr/lib/libcurses.so` at runtime with
 `dlopen`, in order to run Template Haskell code in `Data.Range.Range`.
 It's not trying to link it with `ld`. So, this is a limitation of the
 system `dlopen`, and we are in "workaround" territory.

 (Incidentally, my `dlopen` on Debian (libc 2.18-4) doesn't seem to handle
 either `INPUT(-llibrary)` or `INPUT(filename)`.)

 #2615 was from when GHC used its own custom loader rather than `dlopen`.
 I'm not eager to bring any of that back, but I guess we could try to
 detect a linker script if `dlopen` fails.

 One thing (well, two things) I don't understand is where the dependency on
 `/usr/lib/libcurses.so` is coming from, and what kind of dependency it is
 exactly. Who is loading `/usr/lib/libcurses.so`: does `dlopen` load
 dependencies for us, or do we track them ourselves and load them first?
 Maybe we can arrange things when we build the `llvm-general-3.4.2.2`
 library so that the dependency is on the real shared object
 `/usr/lib/libncursesw.so`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9237#comment:1>
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