[PATCH][next] Makefile: Enable -Wstringop-overflow globally

Gustavo A. R. Silva
2023-11-16T03:27:15Z

It seems that we have finished addressing all the remaining
issues regarding compiler option -Wstringop-overflow. So, we
are now in good shape to enable this compiler option globally.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Makefile | 3 +++
scripts/Makefile.extrawarn | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 690cde550acd..452b7d0e19e9 100644
--- a/Makefile
+++ b/Makefile
@@ -985,6 +985,9 @@ NOSTDINC_FLAGS += -nostdinc
# perform bounds checking.
KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)

+# We are now in good shape to enable this option.
+KBUILD_CFLAGS += $(call cc-option, -Wstringop-overflow)
+
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += -fno-strict-overflow

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 2fe6f2828d37..1527199161d7 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -106,7 +106,6 @@ KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
KBUILD_CFLAGS += $(call cc-option, -Wformat-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wformat-truncation)
-KBUILD_CFLAGS += $(call cc-option, -Wstringop-overflow)
KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)

KBUILD_CPPFLAGS += -Wundef
@@ -122,7 +121,6 @@ KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
-KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)

ifdef CONFIG_CC_IS_CLANG
--
2.34.1