Newbie building GHC

[Simon Marlow]

> The reason that this worries me is that Cygwin "ld" links=20
> with libraries
> from the Cygwin "lib" directory rather than the Mingw=20
> equivalent, regardless
> of which "gcc" was used to compile the object files.

We only use ld directly when building the GHCi libraries (HSbase.o
etc.), and this doesn't use any external libraries, so I think we're ok
here.  Normal linking of Haskell programs is done using gcc, so we'll
get the right version of ld there.

Cheers,
	Simon