[PATCH v1] perf build: Revert "enable -fno-strict-aliasing"

From: Ian Rogers
Date: Thu Sep 04 2025 - 13:44:44 EST


This reverts commit 55a18d2f3ff7 ("perf build: enable
-fno-strict-aliasing"). With (get|put)_unaligned_* using memcpy
-fno-strict-aliasing is no longer necessary as memcpys are assumed to
possibly alias.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
This patch needs:
https://lore.kernel.org/lkml/20250722215754.672330-1-irogers@xxxxxxxxxx/
which have been merged into the tip timers/vdso branch.
---
tools/perf/Makefile.config | 4 ----
1 file changed, 4 deletions(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 5a5832ee7b53..306b8334b788 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -19,10 +19,6 @@ detected_var = $(shell echo "$(1)=$($(1))" >> $(OUTPUT).config-detected)
CFLAGS := $(EXTRA_CFLAGS) $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
HOSTCFLAGS := $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))

-# This is required because the kernel is built with this and some of the code
-# borrowed from kernel headers depends on it, e.g. put_unaligned_*().
-CFLAGS += -fno-strict-aliasing
-
# Enabled Wthread-safety analysis for clang builds.
ifeq ($(CC_NO_CLANG), 0)
CFLAGS += -Wthread-safety
--
2.51.0.355.g5224444f11-goog