linux-kernel - Re: [PATCH v2] perf test: Use -Wp,-U_FORTIFY

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Message-ID: <D753C41A-F941-4FC0-B622-ACD8709B06FC@nutanix.com>
Date: Thu, 5 Sep 2024 01:49:08 +0000
From: Eiichi Tsukata <eiichi.tsukata@...anix.com>
To: "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com"
	<mingo@...hat.com>,
        "acme@...nel.org" <acme@...nel.org>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "mark.rutland@....com"
	<mark.rutland@....com>,
        "alexander.shishkin@...ux.intel.com"
	<alexander.shishkin@...ux.intel.com>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "irogers@...gle.com" <irogers@...gle.com>,
        "adrian.hunter@...el.com"
	<adrian.hunter@...el.com>,
        "kan.liang@...ux.intel.com"
	<kan.liang@...ux.intel.com>,
        Eiichi Tsukata <eiichi.tsukata@...anix.com>,
        "howardchu95@...il.com" <howardchu95@...il.com>,
        "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] perf test: Use -Wp,-U_FORTIFY_SOURCE for tests built
 with -O0

Ping

> On Aug 27, 2024, at 11:50, Eiichi Tsukata <eiichi.tsukata@...anix.com> wrote:
> 
> If EXTRA_CFLAGS has "-Wp,-D_FORTIFY_SOURCE=2", the build fails with:
> 
>  error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp]
> 
> Use "-Wp,-U_FORTIFY_SOURCE" instead of "-U_FORTIFY_SOURCE" for tests
> built with -O0.
> 
> Signed-off-by: Eiichi Tsukata <eiichi.tsukata@...anix.com>
> ---
> tools/perf/tests/workloads/Build | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build
> index 5af17206f04d..e9af6b903770 100644
> --- a/tools/perf/tests/workloads/Build
> +++ b/tools/perf/tests/workloads/Build
> @@ -8,7 +8,7 @@ perf-test-y += brstack.o
> perf-test-y += datasym.o
> perf-test-y += landlock.o
> 
> -CFLAGS_sqrtloop.o         = -g -O0 -fno-inline -U_FORTIFY_SOURCE
> -CFLAGS_leafloop.o         = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE
> -CFLAGS_brstack.o          = -g -O0 -fno-inline -U_FORTIFY_SOURCE
> -CFLAGS_datasym.o          = -g -O0 -fno-inline -U_FORTIFY_SOURCE
> +CFLAGS_sqrtloop.o         = -g -O0 -fno-inline -Wp,-U_FORTIFY_SOURCE
> +CFLAGS_leafloop.o         = -g -O0 -fno-inline -fno-omit-frame-pointer -Wp,-U_FORTIFY_SOURCE
> +CFLAGS_brstack.o          = -g -O0 -fno-inline -Wp,-U_FORTIFY_SOURCE
> +CFLAGS_datasym.o          = -g -O0 -fno-inline -Wp,-U_FORTIFY_SOURCE
> -- 
> 2.46.0
>