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
13 CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH))
14 CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH))
16 ifeq ($(CROSS_COMPILE),)
17 ifeq ($(CLANG_TARGET_FLAGS),)
18 $(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang)
20 CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
21 endif # CLANG_TARGET_FLAGS
23 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
27 CLANG_FLAGS += -fno-integrated-as
28 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
29 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
31 CLANG_FLAGS += -fintegrated-as
33 # By default, clang only warns when it encounters an unknown warning flag or
34 # certain optimization flags it knows it has not implemented.
35 # Make it behave more like gcc by erroring when these flags are encountered
36 # so they can be implemented or wrapped in cc-option.
37 CLANG_FLAGS += -Werror=unknown-warning-option
38 CLANG_FLAGS += -Werror=ignored-optimization-argument
39 KBUILD_CFLAGS += $(CLANG_FLAGS)
40 KBUILD_AFLAGS += $(CLANG_FLAGS)