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Date:   Wed, 17 Nov 2021 12:00:30 +0900
From:   Mike Hommey <mh@glandium.org>
To:     =?utf-8?B?w4Z2YXIgQXJuZmrDtnLDsA==?= Bjarmason <avarab@gmail.com>
Cc:     git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
        Phillip Wood <phillip.wood123@gmail.com>,
        Jeff King <peff@peff.net>, Dan Jacques <dnj@google.com>,
        Eric Wong <e@80x24.org>, Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [PATCH v3 21/23] Makefile: disable GNU make built-in wildcard
 rules
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On Tue, Nov 16, 2021 at 01:00:21PM +0100, Ævar Arnfjörð Bjarmason wrote:
> +### Remove GNU make implicit rules
> +
> +## This speeds things up since we don't need to look for and stat() a
> +## "foo.c,v" every time a rule referring to "foo.c" is in play. See
> +## "make -p -f/dev/null | grep ^%::'".
> +%:: %,v
> +%:: RCS/%,v
> +%:: RCS/%
> +%:: s.%
> +%:: SCCS/s.%

`MAKEFLAGS += -r` should have the same effect (and more)