ghci doesn't resolve libm symbols properly on Windows

[augustss]

The erf package on hackage uses the libm functions erf and erfc. This all works fine in ghc, but in ghci we get an error.

To repeat:

cabal install erf

Try compiling

import Data.Number.Erf
main = print $ erf (1::Double)

and it works fine. Now try

ghci
:m +Data.Number.Erf
print $ erf (1::Double)

and the result is

Loading package syb ... linking ... done.
Loading package base-3.0.3.1 ... linking ... done.
Loading package erf-1.0.0.0 ... linking ... <interactive>: C:\Program Files\Haskell\erf-1.0.0.0\ghc-6.10.4\HSerf-1.0.0.0.o: unknown
symbol `_erfc'
: unable to load package `erf-1.0.0.0'

[simonmar]

Fixed

Wed Sep 23 03:52:40 PDT 2009  Simon Marlow <marlowsd@gmail.com>
  * Add erf, erfc, erfff, erfcf (#3536)