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kbuild: replace cc-name test with CONFIG_CC_IS_CLANG

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Evaluating cc-name invokes the compiler every time even when you are
not compiling anything, like 'make help'. This is not efficient.

The compiler type has been already detected in the Kconfig stage.
Use CONFIG_CC_IS_CLANG, instead.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Paul Burton <paul.burton@mips.com> (MIPS)
Acked-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Masahiro Yamada 2018-10-30 22:26:33 +09:00
parent 2cd3faf87d
commit 076f421da5
5 changed files with 6 additions and 6 deletions
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2
Makefile
View File

@ -702,7 +702,7 @@ stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
KBUILD_CFLAGS += $(stackp-flags-y)
ifeq ($(cc-name),clang)
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)

2
arch/mips/Makefile
View File

@ -128,7 +128,7 @@ cflags-y += -ffreestanding
# clang's output will be based upon the build machine. So for clang we simply
# unconditionally specify -EB or -EL as appropriate.
#
ifeq ($(cc-name),clang)
ifdef CONFIG_CC_IS_CLANG
cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
else

2
arch/mips/vdso/Makefile
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@ -10,7 +10,7 @@ ccflags-vdso := \
$(filter -march=%,$(KBUILD_CFLAGS)) \
-D__VDSO__
ifeq ($(cc-name),clang)
ifdef CONFIG_CC_IS_CLANG
ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS))
endif

4
arch/powerpc/Makefile
View File

@ -96,7 +96,7 @@ aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
endif
ifneq ($(cc-name),clang)
ifndef CONFIG_CC_IS_CLANG
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
endif
@ -175,7 +175,7 @@ endif
# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
ifneq ($(cc-name),clang)
ifndef CONFIG_CC_IS_CLANG
CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
endif
endif

2
scripts/Makefile.extrawarn
View File

@ -64,7 +64,7 @@ endif
KBUILD_CFLAGS += $(warning)
else
ifeq ($(cc-name),clang)
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)