Commit a1494304 authored by Masahiro Yamada's avatar Masahiro Yamada
Browse files

kbuild: add all Clang-specific flags unconditionally 



We do not support old Clang versions. Upgrade your clang version
if any of these flags is unsupported.

Let's add all flags inside ifdef CONFIG_CC_IS_CLANG unconditionally.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: default avatarSedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: default avatarNathan Chancellor <natechancellor@gmail.com>
Tested-by: default avatarNick Desaulniers <ndesaulniers@google.com>
parent 7eb8e5f0

Makefile

+5 −5
Original line number Diff line number Diff line
@@ -731,15 +731,15 @@ stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 
KBUILD_CFLAGS += $(stackp-flags-y)



ifdef CONFIG_CC_IS_CLANG

KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)

KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)

KBUILD_CFLAGS += $(call cc-disable-warning, gnu)

KBUILD_CPPFLAGS += -Qunused-arguments

KBUILD_CFLAGS += -Wno-format-invalid-specifier

KBUILD_CFLAGS += -Wno-gnu

# Quiet clang warning: comparison of unsigned expression < 0 is always false

KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)

KBUILD_CFLAGS += -Wno-tautological-compare

# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the

# source of a reference will be _MergedGlobals and not on of the whitelisted names.

# See modpost pattern 2

KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)

KBUILD_CFLAGS += -mno-global-merge

else



# These warnings generated too much noise in a regular build.

scripts/Makefile.extrawarn

+6 −6
Original line number Diff line number Diff line
@@ -67,11 +67,11 @@ KBUILD_CFLAGS += $(warning) 
else



ifdef CONFIG_CC_IS_CLANG

KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)

KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)

KBUILD_CFLAGS += $(call cc-disable-warning, format)

KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)

KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)

KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)

KBUILD_CFLAGS += -Wno-initializer-overrides

KBUILD_CFLAGS += -Wno-unused-value

KBUILD_CFLAGS += -Wno-format

KBUILD_CFLAGS += -Wno-sign-compare

KBUILD_CFLAGS += -Wno-format-zero-length

KBUILD_CFLAGS += -Wno-uninitialized

endif

endif

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