| 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_loongarch := loongarch64-linux-gnusf |
| 8 | CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu |
| 9 | CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu |
| 10 | CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu |
| 11 | CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu |
| 12 | CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu |
| 13 | CLANG_TARGET_FLAGS_sparc := sparc64-linux-gnu |
| 14 | CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu |
| 15 | # This is only for i386 UM builds, which need the 32-bit target not -m32 |
| 16 | CLANG_TARGET_FLAGS_i386 := i386-linux-gnu |
| 17 | CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH)) |
| 18 | CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH)) |
| 19 | |
| 20 | ifeq ($(CLANG_TARGET_FLAGS),) |
| 21 | $(error add '--target=' option to scripts/Makefile.clang) |
| 22 | else |
| 23 | CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) |
| 24 | endif |
| 25 | |
| 26 | ifeq ($(LLVM_IAS),0) |
| 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)) |
| 30 | else |
| 31 | CLANG_FLAGS += -fintegrated-as |
| 32 | endif |
| 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 | CLANG_FLAGS += -Werror=option-ignored |
| 40 | CLANG_FLAGS += -Werror=unused-command-line-argument |
| 41 | KBUILD_CPPFLAGS += $(CLANG_FLAGS) |
| 42 | export CLANG_FLAGS |