| Nick Desaulniers | 231ad7f | 2021-08-02 11:39:09 -0700 | [diff] [blame] | 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 := $(CLANG_TARGET_FLAGS_$(SRCARCH)) |
| 14 | |
| 15 | ifeq ($(CROSS_COMPILE),) |
| 16 | ifeq ($(CLANG_TARGET_FLAGS),) |
| 17 | $(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang) |
| 18 | else |
| 19 | CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) |
| 20 | endif # CLANG_TARGET_FLAGS |
| 21 | else |
| Nick Desaulniers | 6f5b41a | 2021-08-02 11:39:08 -0700 | [diff] [blame] | 22 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
| Nick Desaulniers | 231ad7f | 2021-08-02 11:39:09 -0700 | [diff] [blame] | 23 | endif # CROSS_COMPILE |
| 24 | |
| Nick Desaulniers | f12b034 | 2021-08-06 10:27:01 -0700 | [diff] [blame] | 25 | ifeq ($(LLVM_IAS),0) |
| Nathan Chancellor | 2185a7e | 2021-08-16 13:52:47 -0700 | [diff] [blame] | 26 | CLANG_FLAGS += -fno-integrated-as |
| Nick Desaulniers | 6f5b41a | 2021-08-02 11:39:08 -0700 | [diff] [blame] | 27 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
| 28 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
| Nick Desaulniers | f12b034 | 2021-08-06 10:27:01 -0700 | [diff] [blame] | 29 | else |
| Nathan Chancellor | 2185a7e | 2021-08-16 13:52:47 -0700 | [diff] [blame] | 30 | CLANG_FLAGS += -fintegrated-as |
| Nick Desaulniers | 6f5b41a | 2021-08-02 11:39:08 -0700 | [diff] [blame] | 31 | endif |
| Nathan Chancellor | 0664684 | 2021-09-16 11:40:17 -0700 | [diff] [blame] | 32 | # By default, clang only warns when it encounters an unknown warning flag or |
| 33 | # certain optimization flags it knows it has not implemented. |
| 34 | # Make it behave more like gcc by erroring when these flags are encountered |
| 35 | # so they can be implemented or wrapped in cc-option. |
| Nick Desaulniers | 6f5b41a | 2021-08-02 11:39:08 -0700 | [diff] [blame] | 36 | CLANG_FLAGS += -Werror=unknown-warning-option |
| Nathan Chancellor | 0664684 | 2021-09-16 11:40:17 -0700 | [diff] [blame] | 37 | CLANG_FLAGS += -Werror=ignored-optimization-argument |
| Nick Desaulniers | 6f5b41a | 2021-08-02 11:39:08 -0700 | [diff] [blame] | 38 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
| 39 | KBUILD_AFLAGS += $(CLANG_FLAGS) |
| 40 | export CLANG_FLAGS |