linux-kernel - Re: [PATCH] treewide: remove meaningless assignments in Makefiles

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Date: Mon, 26 Feb 2024 08:20:50 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Jiri Olsa <jolsa@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Mark Rutland <mark.rutland@....com>,
	linux-kbuild@...r.kernel.org,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH] treewide: remove meaningless assignments in Makefiles

On Wed, 21 Feb 2024 22:42:01 +0900, Masahiro Yamada wrote:
> In Makefiles, $(error ), $(warning ), and $(info ) expand to the empty
> string, as explained in the GNU Make manual [1]:
>  "The result of the expansion of this function is the empty string."
> 
> Therefore, they are no-op except for logging purposes.
> 
> $(shell ...) expands to the output of the command. It expands to the
> empty string when the command does not print anything to stdout.
> Hence, $(shell mkdir ...) is no-op except for creating the directory.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
-- 
Namhyung Kim <namhyung@...nel.org>