Re: emacs-w3m doesn't create Makefile (using Windows 10 64-Bit with Cygwin64)

I think the problem is rather install-info cannot tell that the directory actually exists. Here is what I get:
$ cd /cygdrive/c/Program\ Files\ $x86$/GNU\ Emacs\ 24.5/share/info/

$ pwd
/cygdrive/c/Program Files (x86)/GNU Emacs 24.5/share/info

$ ls
emacs-w3m-ja.info.gz* reftex.info*         htmlfontify.info*   edt.info*
emacs-w3m.info.gz*     remember.info*       forms.info*         ediff.info*
woman.info*            rcirc.info*          eww.info*           ebrowse.info*
widget.info*           preview-latex.info* flymake.info*       ede.info*
wisent.info*           pcl-cvs.info*        eudc.info*          dbus.info*
viper.info*            pgg.info*            ess.info*           dir*
url.info*              org.info*            ert.info*           dired-x.info*
vip.info*              org*                 eshell.info*        cl.info*
todo-mode.info*        octave-mode.info*    epa.info*           ccmode.info*
tramp.info*            nxml-mode.info*      erc.info*           calc.info*
speedbar.info*         mh-e.info*           emacs.info*         bovine.info*
srecode.info*          newsticker.info*     emacs-gnutls.info* auctex.info-2*
sieve.info*            message.info*        emacs-mime.info*    auth.info*
smtpmail.info*         mairix-el.info*      elisp.info*         autotype.info*
ses.info*              ido.info*            eintr.info*         auctex.info-1*
sc.info*               info.info*           efaq.info*          ada-mode.info*
semantic.info*         idlwave.info*        eieio.info*         auctex.info*
sasl.info*             gnus.info*           efaq-w32.info*

On Thu, Nov 26, 2015 at 3:02 PM, Katsumi Yamaoka <yamaoka@xxxxxxx> wrote:

John Wong <thjwong@xxxxxxxxx> wrote:
> $ install-info "/cygdrive/c/Program Files (x86)/GNU Emacs 24.5/share/info/
> emacs-w3m.info"
> install-info: No dir file specified; try --help for more information.

This means that the "dir" file doesn't exist in the info directory.
Hmm, it's strange. Doesn't the 64-bit Windows Emacs package have
it? The 32-bit package contains it together with many info files.