1 # Individual arch/{arch}/Makefiles should use 1 # Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
2 # endianness and -m32/-m64 to set word size ba 2 # endianness and -m32/-m64 to set word size based on Kconfigs instead of
3 # relying on the target triple. 3 # relying on the target triple.
4 CLANG_TARGET_FLAGS_arm := arm-linux-g 4 CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
5 CLANG_TARGET_FLAGS_arm64 := aarch64-lin 5 CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
6 CLANG_TARGET_FLAGS_hexagon := hexagon-lin 6 CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
7 CLANG_TARGET_FLAGS_loongarch := loongarch64 <<
8 CLANG_TARGET_FLAGS_m68k := m68k-linux- 7 CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
9 CLANG_TARGET_FLAGS_mips := mipsel-linu 8 CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
10 CLANG_TARGET_FLAGS_powerpc := powerpc64le 9 CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
11 CLANG_TARGET_FLAGS_riscv := riscv64-lin 10 CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
12 CLANG_TARGET_FLAGS_s390 := s390x-linux 11 CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
13 CLANG_TARGET_FLAGS_x86 := x86_64-linu 12 CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
14 CLANG_TARGET_FLAGS_um := $(CLANG_TAR 13 CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH))
15 CLANG_TARGET_FLAGS := $(CLANG_TAR 14 CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH))
16 15
>> 16 ifeq ($(CROSS_COMPILE),)
17 ifeq ($(CLANG_TARGET_FLAGS),) 17 ifeq ($(CLANG_TARGET_FLAGS),)
18 $(error add '--target=' option to scripts/Make !! 18 $(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang)
19 else 19 else
20 CLANG_FLAGS += --target=$(CLANG_TARGET_FLA 20 CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
21 endif !! 21 endif # CLANG_TARGET_FLAGS
>> 22 else
>> 23 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 24 endif # CROSS_COMPILE
22 25
23 ifeq ($(LLVM_IAS),0) 26 ifeq ($(LLVM_IAS),0)
24 CLANG_FLAGS += -fno-integrated-as 27 CLANG_FLAGS += -fno-integrated-as
25 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CRO 28 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
26 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DI 29 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
27 else 30 else
28 CLANG_FLAGS += -fintegrated-as 31 CLANG_FLAGS += -fintegrated-as
29 endif 32 endif
30 # By default, clang only warns when it encount 33 # By default, clang only warns when it encounters an unknown warning flag or
31 # certain optimization flags it knows it has n 34 # certain optimization flags it knows it has not implemented.
32 # Make it behave more like gcc by erroring whe 35 # Make it behave more like gcc by erroring when these flags are encountered
33 # so they can be implemented or wrapped in cc- 36 # so they can be implemented or wrapped in cc-option.
34 CLANG_FLAGS += -Werror=unknown-warning-opt 37 CLANG_FLAGS += -Werror=unknown-warning-option
35 CLANG_FLAGS += -Werror=ignored-optimizatio 38 CLANG_FLAGS += -Werror=ignored-optimization-argument
36 CLANG_FLAGS += -Werror=option-ignored !! 39 KBUILD_CFLAGS += $(CLANG_FLAGS)
37 CLANG_FLAGS += -Werror=unused-command-line !! 40 KBUILD_AFLAGS += $(CLANG_FLAGS)
38 KBUILD_CPPFLAGS += $(CLANG_FLAGS) <<
39 export CLANG_FLAGS 41 export CLANG_FLAGS
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