bug#16429: 24.3.50; an issue in mingw making

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Date: Mon, 13 Jan 2014 12:01:39 -0500
> Cc: 16429@debbugs.gnu.org
> 
> Note that you have the following environment variables set.

They could be either in the environment or in the Registry.  If
neither of these is set, we will not see these variables in the bug
report.

> There's no need to have these set (unless you want to do something
> unusual), and setting them is a great way to break Emacs in exactly the
> way you seem to describe above.

Right.

> So try unsetting them before you build.

If they are in the Registry, they should be deleted with regedit.

> The build process should probably unset EMACSDATA (and DOC?), like it
> does with EMACSLOADPATH.

Not sure whether we care about EMACSDOC during the build.

> I guess EMACSPATH doesn't matter?

I don't think it does.