2017-10-28 20:30 GMT+02:00 Eli Zaretskii <eliz@gnu.org>:

> > From: Fabrice Popineau <fabrice.popineau@gmail.com>
> > Date: Sat, 28 Oct 2017 19:59:20 +0200
> > Cc: Emacs developers <emacs-devel@gnu.org>
> >
> > I configure with --prefix=/mingw64
> > and everything under /mingw64/bin has been erased
>
> Can you spot the Makefile rule or command that does/did this?
> Maybe I'm blind, but I couldn't find it.
>

I have HDD errors. The directory has been lost.
I was extremely puzzled.
Sorry for the noise.