When building under Cygwin, Cygwin paths must be translated into
Windows paths before being passed as arguments to non-Cygwin programs.
The build infrastructure does this using the construct

FOO := $(shell $(CYGPATH) -u /some/path)

The problem is that the resulting path contains backslashes, which do
not interact well with subsequent Unix commands.

As a result, for example, make sanity emits the nonsensical

   OUTPUTDIR = d:\martin\ws\purgatory iger^Huild\windows-i586

This is easy to fix. Paths with forward slashes work just as well
(better, in fact), and such paths are used with the MKS build.
We just change the construct

$(shell $(CYGPATH) -u ...)
to
$(shell $(CYGPATH) -m ...)

With this change, `make images' suddenly starts working.
###@###.### 2003-06-03