From: Junio C Hamano <gitster@pobox.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Ramsay Jones <ramsay@ramsayjones.plus.com>,
Jeff King <peff@peff.net>,
git@vger.kernel.org, Denton Liu <liu.denton@gmail.com>
Subject: Re: [PATCH 0/3] Makefile: make "sparse" and "hdr-check" non-.PHONY
Date: Wed, 22 Sep 2021 18:23:22 -0700 [thread overview]
Message-ID: <xmqqtuic2igl.fsf@gitster.g> (raw)
In-Reply-To: <87pmt05bww.fsf@evledraar.gmail.com> ("Ævar Arnfjörð Bjarmason"'s message of "Thu, 23 Sep 2021 03:07:04 +0200")
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
> I've got some WIP efforts in other areas to do that for some other
> rules.
>
> The problem is that you need to "mkdir .shrapnel" to create a
> ".shrapnel/revision.sp". So you need the ".shrapnel/revision.sp" to
> depend on the ".shrapnel".
>
> Except you'll find that the naïve implementation of that fails, since
> any file you create will bump the mtime of the containing directory, so
> you'll keep re-making ".shrapnel/revision.sp" because ".shrapnel"
> changed, because ".shrapnel/revision.sp" changed...
We depend on GNU make anyway. Isn't its "order-only-prerequisites"
feature what you exactly want to use for the above?
next prev parent reply other threads:[~2021-09-23 1:23 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-21 22:55 [PATCH 0/3] Makefile: make "sparse" and "hdr-check" non-.PHONY Ævar Arnfjörð Bjarmason
2021-09-21 22:55 ` [PATCH 1/3] Makefile: make the "sparse" target non-.PHONY Ævar Arnfjörð Bjarmason
2021-09-22 2:24 ` Jeff King
2021-09-21 22:55 ` [PATCH 2/3] Makefile: do one append in %.hcc rule Ævar Arnfjörð Bjarmason
2021-09-21 22:55 ` [PATCH 3/3] Makefile: make the "hdr-check" target non-.PHONY Ævar Arnfjörð Bjarmason
2021-09-22 2:11 ` [PATCH 0/3] Makefile: make "sparse" and "hdr-check" non-.PHONY Jeff King
2021-09-22 16:58 ` Ramsay Jones
2021-09-22 17:53 ` Jeff King
2021-09-22 19:17 ` Ramsay Jones
2021-09-22 23:28 ` Junio C Hamano
2021-09-23 1:07 ` Ævar Arnfjörð Bjarmason
2021-09-23 1:23 ` Junio C Hamano [this message]
2021-09-23 2:17 ` Ævar Arnfjörð Bjarmason
2021-09-22 19:24 ` Junio C Hamano
2021-09-23 0:07 ` [PATCH v2] Makefile: make the "sparse" target non-.PHONY Ævar Arnfjörð Bjarmason
2021-09-23 16:24 ` Jeff King
2021-09-23 17:06 ` Ævar Arnfjörð Bjarmason
2021-09-23 17:17 ` Jeff King
2021-09-23 17:39 ` Junio C Hamano
2021-09-23 23:28 ` Ramsay Jones
2021-09-24 1:16 ` Ævar Arnfjörð Bjarmason
2021-09-24 16:38 ` Ramsay Jones
2021-09-24 1:30 ` Ævar Arnfjörð Bjarmason
2021-09-24 19:37 ` Junio C Hamano
2021-09-28 1:15 ` [PATCH v3] Makefile: add a non-.PHONY "sparse-incr" target Ævar Arnfjörð Bjarmason
2021-09-28 1:43 ` [PATCH v4] " Ævar Arnfjörð Bjarmason
2021-09-28 17:44 ` Junio C Hamano
2021-09-28 19:45 ` Ævar Arnfjörð Bjarmason
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