ghc --make and missing interface files

[Simon Marlow]

> Hello all, I have a file BinaryIO.  This used to import a module
> HGetCharHack to work around an annoying problem with ghc5.04 which
> meant that hGetChar was blocking unexpectedly.  However I see that
> this problem has now been fixed in ghc6 (ta very much, Simon) so I
> deleted the files HGetCharHack.*, modified BinaryIO to stop importing
> it, and then tried to compile it using ghc --make.  However the thing
> fell over, as follows:
> 
>  > Skipping ... (lots of files) ...
>  > Skipping UnionFind
>  >
>  > Could not find interface file for `HGetCharHack'
>  > (use -v to see a list of the files searched for)

Yes, this is a known bug (it's been on my whiteboard for a few months).
We will get around to fixing it at some point.  In the meantime,
deleting the offending .hi file is the easy workaround.

Cheers,
	Simon