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From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
	Jiri Olsa <jolsa@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-kbuild@vger.kernel.org,
	Ian Rogers <irogers@google.com>,
	Adrian Hunter <adrian.hunter@intel.com>
Subject: Re: [PATCH] treewide: remove meaningless assignments in Makefiles
Date: Mon, 26 Feb 2024 08:20:50 -0800
Message-ID: <170896440863.1919080.13935215273444154098.b4-ty@kernel.org>
In-Reply-To: <20240221134201.2656908-1-masahiroy@kernel.org>
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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@kernel.org>