[linux.git] / scripts / Makefile.clang

# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
# endianness and -m32/-m64 to set word size based on Kconfigs instead of
# relying on the target triple.
CLANG_TARGET_FLAGS_arm		:= arm-linux-gnueabi
CLANG_TARGET_FLAGS_arm64	:= aarch64-linux-gnu
CLANG_TARGET_FLAGS_hexagon	:= hexagon-linux-musl
CLANG_TARGET_FLAGS_m68k		:= m68k-linux-gnu
CLANG_TARGET_FLAGS_mips		:= mipsel-linux-gnu
CLANG_TARGET_FLAGS_powerpc	:= powerpc64le-linux-gnu
CLANG_TARGET_FLAGS_riscv	:= riscv64-linux-gnu
CLANG_TARGET_FLAGS_s390		:= s390x-linux-gnu
CLANG_TARGET_FLAGS_x86		:= x86_64-linux-gnu
CLANG_TARGET_FLAGS_um		:= $(CLANG_TARGET_FLAGS_$(SUBARCH))
CLANG_TARGET_FLAGS		:= $(CLANG_TARGET_FLAGS_$(SRCARCH))

ifeq ($(CLANG_TARGET_FLAGS),)
$(error add '--target=' option to scripts/Makefile.clang)
else
CLANG_FLAGS	+= --target=$(CLANG_TARGET_FLAGS)
endif

ifeq ($(LLVM_IAS),0)
CLANG_FLAGS	+= -fno-integrated-as
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
else
CLANG_FLAGS	+= -fintegrated-as
endif
# By default, clang only warns when it encounters an unknown warning flag or
# certain optimization flags it knows it has not implemented.
# Make it behave more like gcc by erroring when these flags are encountered
# so they can be implemented or wrapped in cc-option.
CLANG_FLAGS	+= -Werror=unknown-warning-option
CLANG_FLAGS	+= -Werror=ignored-optimization-argument
CLANG_FLAGS	+= -Werror=option-ignored
CLANG_FLAGS	+= -Werror=unused-command-line-argument
KBUILD_CFLAGS	+= $(CLANG_FLAGS)
KBUILD_AFLAGS	+= $(CLANG_FLAGS)
export CLANG_FLAGS
Commit	Line	Data
231ad7f4 ND	1	# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
	2	# endianness and -m32/-m64 to set word size based on Kconfigs instead of
	3	# relying on the target triple.
	4	CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
	5	CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
	6	CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
	7	CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
	8	CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
	9	CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
	10	CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
	11	CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
	12	CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
c7500c1b	13	CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH))
231ad7f4 ND	14	CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH))
231ad7f4 ND	15
231ad7f4	16	ifeq ($(CLANG_TARGET_FLAGS),)
ddc72c96	17	$(error add '--target=' option to scripts/Makefile.clang)
231ad7f4 ND	18	else
231ad7f4 ND	19	CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
ddc72c96	20	endif
231ad7f4	21
f12b034a	22	ifeq ($(LLVM_IAS),0)
2185a7e4	23	CLANG_FLAGS += -fno-integrated-as
6f5b41a2 ND	24	GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
6f5b41a2 ND	25	CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
f12b034a	26	else
2185a7e4	27	CLANG_FLAGS += -fintegrated-as
6f5b41a2	28	endif
0664684e NC	29	# By default, clang only warns when it encounters an unknown warning flag or
	30	# certain optimization flags it knows it has not implemented.
	31	# Make it behave more like gcc by erroring when these flags are encountered
	32	# so they can be implemented or wrapped in cc-option.
6f5b41a2	33	CLANG_FLAGS += -Werror=unknown-warning-option
0664684e	34	CLANG_FLAGS += -Werror=ignored-optimization-argument
db1547c5 NC	35	CLANG_FLAGS += -Werror=option-ignored
db1547c5 NC	36	CLANG_FLAGS += -Werror=unused-command-line-argument
6f5b41a2 ND	37	KBUILD_CFLAGS += $(CLANG_FLAGS)
	38	KBUILD_AFLAGS += $(CLANG_FLAGS)
	39	export CLANG_FLAGS