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. 4CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi 5CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu 6CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl 7CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu 8CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu 9CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu 10CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu 11CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu 12CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu 13CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH)) 14CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH)) 15 16ifeq ($(CROSS_COMPILE),) 17ifeq ($(CLANG_TARGET_FLAGS),) 18$(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang) 19else 20CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) 21endif # CLANG_TARGET_FLAGS 22else 23CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 24endif # CROSS_COMPILE 25 26ifeq ($(LLVM_IAS),0) 27CLANG_FLAGS += -fno-integrated-as 28GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 29CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) 30else 31CLANG_FLAGS += -fintegrated-as 32endif 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. 37CLANG_FLAGS += -Werror=unknown-warning-option 38CLANG_FLAGS += -Werror=ignored-optimization-argument 39KBUILD_CFLAGS += $(CLANG_FLAGS) 40KBUILD_AFLAGS += $(CLANG_FLAGS) 41export CLANG_FLAGS 42