patch applied (cabal): Import FilePath.dropDrive for hugs and GHC>6.6. In all other cases, provide our own.

[Ross Paterson]

On Fri, Aug 24, 2007 at 09:00:55PM +0200, Clemens Fruhwirth wrote:
> At Fri, 24 Aug 2007 19:30:20 +0100,
> "Neil Mitchell" <ndmitchell at gmail.com> wrote:
> 
> > In GHC 6.6.1, dropDrive is not available, it will only be the next release.
> 
> What would be a more appropriate variable to check?
> __GLASGOW_HASKELL__ only includes the major and minor number but not
> the patch level. We could change the check to default to the compat
> version for the whole GHC 6.6.x series (which wouldn't hurt that much
> as dropDrive isn't that huge)

What you did was correct: __GLASGOW_HASKELL__ is 606 for all the 6.6.x
releases, none of which have dropDrive.  The define doesn't distinguish
patch levels, because they are guaranteed to have the same API.