I'm using bison built under a cygwin environment. (For cross-platform
purposes there are reasons we want to build it ourselves instead of using
the precompiled bison that comes with cygwin.) It seems to be having
trouble processing .y files in DOS format (with the ^M's at the end of
lines). The built-in cygwin version does not have this problem. Is there
some configure option that I need to specify when building bison to get
this to work right?