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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Development Speed
Date: Thu, 23 Dec 2021 22:16:59 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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In-Reply-To: <jwvwnjvf5zx.fsf-monnier+emacs@gnu.org> (message from Stefan
 Monnier on Thu, 23 Dec 2021 15:10:34 -0500)
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org,  eliz@gnu.org
> Date: Thu, 23 Dec 2021 15:10:34 -0500
> 
> >> I don't even know of any single place where we're not "C17 compliant".
> > I'm confused, does this mean it is possible to fully build Emacs
> > with "-std=c17"?
> 
> I'd assume so until proven otherwise.

Not -std=c17, -std=gnu17.  We need some extensions, and cannot compile
with __STRICT_ANSI__ defined (which is what -std=c17 does, AFAIK).