[GHC] #3242: ghci: can't load .so/.DLL for: m (addDLL: could not load DLL)

[GHC]

#3242: ghci: can't load .so/.DLL for: m (addDLL: could not load DLL)
---------------------------------------+---------------------------
              Reporter:  jeffz1        |            Owner:
                  Type:  bug           |           Status:  new
              Priority:  normal        |        Milestone:  7.10.1
             Component:  GHCi          |          Version:  7.4.1
            Resolution:                |         Keywords:
      Operating System:  Windows       |     Architecture:  x86
       Type of failure:  None/Unknown  |       Difficulty:  Unknown
             Test Case:                |       Blocked By:  3658
              Blocking:                |  Related Tickets:  #7097
Differential Revisions:                |
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Comment (by oerjan):

 I suspect I just hit this bug when trying to `cabal install random-extras`
 from Haskell Platform 2014.2.0.0 on Windows 8.1.  The dependency `random-
 fu` uses the `logfloat` library from Template Haskell while compiling
 other modules, which gives me the error message:

 {{{
 [ 7 of 29] Compiling Data.Random.Distribution.Uniform (
 src\Data\Random\Distribu
 tion\Uniform.hs, dist\build\Data\Random\Distribution\Uniform.o )
 Loading package ghc-prim ... linking ... done.
 [snipped long package list]
 Loading package logfloat-0.12.1 ... ghc.exe: m: Den angitte modulen ble
 ikke fun
 net.
 <command line>: can't load .so/.DLL for: m.dll (addDLL: could not load
 DLL)
 Failed to install random-fu-0.2.6.1
 cabal: Error: some packages failed to install:
 random-extras-0.19 depends on random-fu-0.2.6.1 which failed to install.
 random-fu-0.2.6.1 failed during the building phase. The exception was:
 ExitFailure 1
 }}}

 `logfloat.cabal` contains precisely such an `Extra-Libraries: m` line that
 is used in its default configuration. And trying to use `logfloat` from
 (Win)GHCi gives the same kind of error message.

 I am able to get around this for `logfloat` by giving `--flags -useFFI`,
 but I still think it's a shame if this bug prevents a straightforward
 cabal install from working.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3242#comment:27>
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