diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-02-21 22:42:01 +0900 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2024-02-23 14:19:07 -0800 |
| commit | c2bd08ba20a57e0ed55777a9d1724647a0f53e88 (patch) | |
| tree | c9f80489171a7722b8ae41206a374b8847ea643d /tools/perf/arch/x86 | |
| parent | 25412c0364f7110faa6053c73e3fd47ca956b8c3 (diff) | |
treewide: remove meaningless assignments in Makefiles
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.
Remove meaningless assignments.
[1]: https://www.gnu.org/software/make/manual/make.html#Make-Control-Functions
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20240221134201.2656908-1-masahiroy@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Diffstat (limited to 'tools/perf/arch/x86')
| -rw-r--r-- | tools/perf/arch/x86/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile index 5a9f9a7bf07d..8952e00f9b60 100644 --- a/tools/perf/arch/x86/Makefile +++ b/tools/perf/arch/x86/Makefile @@ -17,7 +17,7 @@ sys := $(srctree)/tools/perf/arch/x86/entry/syscalls systbl := $(sys)/syscalltbl.sh # Create output directory if not already present -_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') +$(shell [ -d '$(out)' ] || mkdir -p '$(out)') $(header): $(sys)/syscall_64.tbl $(systbl) $(Q)$(SHELL) '$(systbl)' $(sys)/syscall_64.tbl 'x86_64' > $@ |