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

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Message-Id: <20240827025026.157595-1-eiichi.tsukata@nutanix.com>
Date: Tue, 27 Aug 2024 02:50:26 +0000
From: Eiichi Tsukata <eiichi.tsukata@...anix.com>
To: peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        namhyung@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        irogers@...gle.com, adrian.hunter@...el.com, kan.liang@...ux.intel.com,
        eiichi.tsukata@...anix.com, howardchu95@...il.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] perf test: Use -Wp,-U_FORTIFY_SOURCE for tests built with -O0

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