Commit 076f421d authored by Masahiro Yamada's avatar Masahiro Yamada
Browse files

kbuild: replace cc-name test with CONFIG_CC_IS_CLANG 



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: default avatarMasahiro 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: default avatarJoel Stanley <joel@jms.id.au>
parent 2cd3faf8

Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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)

arch/mips/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/mips/vdso/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/powerpc/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -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

scripts/Makefile.extrawarn

+1 −1
Original line number Diff line number Diff line
@@ -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)

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