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@xxxxxxxxxxxxx> --- Makefile | 2 +- arch/mips/Makefile | 2 +- arch/mips/vdso/Makefile | 2 +- arch/powerpc/Makefile | 4 ++-- scripts/Makefile.extrawarn | 2 +- 5 files changed, 6 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index 0a42d06..bd93bc3 100644 --- a/Makefile +++ b/Makefile @@ -707,7 +707,7 @@ stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong KBUILD_CFLAGS += $(stackp-flags-y) -ifeq ($(cc-name),clang) +ifeq ($(CONFIG_CC_IS_CLANG),y) KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) KBUILD_CFLAGS += $(call cc-disable-warning, gnu) diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 15a84cf..ad1c418 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -128,7 +128,7 @@ cflags-y += -ffreestanding # clang's output will be based upon the build machine. So for clang we simply # unconditionally specify -EB or -EL as appropriate. # -ifeq ($(cc-name),clang) +ifeq ($(CONFIG_CC_IS_CLANG),y) cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL else diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile index 34605ca..e2b055e 100644 --- a/arch/mips/vdso/Makefile +++ b/arch/mips/vdso/Makefile @@ -10,7 +10,7 @@ ccflags-vdso := \ $(filter -march=%,$(KBUILD_CFLAGS)) \ -D__VDSO__ -ifeq ($(cc-name),clang) +ifeq ($(CONFIG_CC_IS_CLANG),y) ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS)) endif diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 17be664..338e827 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -96,7 +96,7 @@ aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 endif -ifneq ($(cc-name),clang) +ifneq ($(CONFIG_CC_IS_CLANG),y) 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) +ifneq ($(CONFIG_CC_IS_CLANG),y) CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) endif endif diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 24b2fb1..88129e5 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -64,7 +64,7 @@ endif KBUILD_CFLAGS += $(warning) else -ifeq ($(cc-name),clang) +ifeq ($(CONFIG_CC_IS_CLANG),y) KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides) KBUILD_CFLAGS += $(call cc-disable-warning, unused-value) KBUILD_CFLAGS += $(call cc-disable-warning, format) -- 2.7.4
