bug#19909: [PATCH] Error out if with-file-notification=w32 is specified on cygwin

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Date: Fri, 20 Feb 2015 15:16:49 +0100
> 
> > According to the comment in w32notify.c, w32.h is included only for
> > w32_strerror.  Could you try commenting out the w32.h inclusion, and
> > instead copy the w32_strerror prototype into w32notify.c?  Does Emacs
> > compile then as part of the Cygwin-w32 build, and do file
> > notifications work?  (I don't have Cygwin installed to try that,
> > sorry.)
> >
> 
> No, that doesn't compile. w32notify.c needs (at least)
> w32_unicode_filenames, filename_to_utf16(), filename_to_ansi() and
> w32_valid_pointer_p() from w32.c.

Right.  But those problems are quite simple to solve.

Ken, would you like to try to solve them?  I could suggest a patch,
but it would be 100% untested.

> I don't think adding w32.c into the build on cygwin is going to work.

Because of the above, or because of something else?