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authorArnd Bergmann <arnd@arndb.de>2024-03-26 15:47:16 +0100
committerMasahiro Yamada <masahiroy@kernel.org>2024-03-31 11:32:26 +0900
commitc40845e3195d074b34f8f8e400e28c9403a06588 (patch)
tree23a2c76dece034eae669a8e977e80c6945305ed8 /scripts
parent1102f9f85bf66b1a7bd6a40afb40efbbe05dfc05 (diff)
kbuild: make -Woverride-init warnings more consistent
The -Woverride-init warn about code that may be intentional or not, but the inintentional ones tend to be real bugs, so there is a bit of disagreement on whether this warning option should be enabled by default and we have multiple settings in scripts/Makefile.extrawarn as well as individual subsystems. Older versions of clang only supported -Wno-initializer-overrides with the same meaning as gcc's -Woverride-init, though all supported versions now work with both. Because of this difference, an earlier cleanup of mine accidentally turned the clang warning off for W=1 builds and only left it on for W=2, while it's still enabled for gcc with W=1. There is also one driver that only turns the warning off for newer versions of gcc but not other compilers, and some but not all the Makefiles still use a cc-disable-warning conditional that is no longer needed with supported compilers here. Address all of the above by removing the special cases for clang and always turning the warning off unconditionally where it got in the way, using the syntax that is supported by both compilers. Fixes: 2cd3271b7a31 ("kbuild: avoid duplicate warning options") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Andrew Jeffery <andrew@codeconstruct.com.au> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.extrawarn10
1 files changed, 3 insertions, 7 deletions
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 3ce5d503a6da..c5af566e911a 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -114,6 +114,8 @@ KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
+KBUILD_CFLAGS += -Wno-override-init # alias for -Wno-initializer-overrides in clang
+
ifdef CONFIG_CC_IS_CLANG
# Clang before clang-16 would warn on default argument promotions.
ifneq ($(call clang-min-version, 160000),y)
@@ -151,10 +153,6 @@ KBUILD_CFLAGS += -Wtype-limits
KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized)
KBUILD_CFLAGS += $(call cc-option, -Wunused-macros)
-ifdef CONFIG_CC_IS_CLANG
-KBUILD_CFLAGS += -Winitializer-overrides
-endif
-
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2
else
@@ -164,9 +162,7 @@ KBUILD_CFLAGS += -Wno-missing-field-initializers
KBUILD_CFLAGS += -Wno-type-limits
KBUILD_CFLAGS += -Wno-shift-negative-value
-ifdef CONFIG_CC_IS_CLANG
-KBUILD_CFLAGS += -Wno-initializer-overrides
-else
+ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -Wno-maybe-uninitialized
endif