1231ad7f4SNick Desaulniers# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended 2231ad7f4SNick Desaulniers# endianness and -m32/-m64 to set word size based on Kconfigs instead of 3231ad7f4SNick Desaulniers# relying on the target triple. 4231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_arm := arm-linux-gnueabi 5231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu 6231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl 7231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_loongarch := loongarch64-linux-gnusf 8231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_m68k := m68k-linux-gnu 9231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_mips := mipsel-linux-gnu 10231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu 11231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu 12231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_s390 := s390x-linux-gnu 13c7500c1bSKees CookCLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu 14231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH)) 15231ad7f4SNick DesaulniersCLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH)) 16231ad7f4SNick Desaulniers 17*ddc72c96SMasahiro Yamadaifeq ($(CLANG_TARGET_FLAGS),) 18231ad7f4SNick Desaulniers$(error add '--target=' option to scripts/Makefile.clang) 19231ad7f4SNick Desaulnierselse 20*ddc72c96SMasahiro YamadaCLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) 21231ad7f4SNick Desaulniersendif 22f12b034aSNick Desaulniers 232185a7e4SNathan Chancellorifeq ($(LLVM_IAS),0) 246f5b41a2SNick DesaulniersCLANG_FLAGS += -fno-integrated-as 256f5b41a2SNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 26f12b034aSNick DesaulniersCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) 272185a7e4SNathan Chancellorelse 286f5b41a2SNick DesaulniersCLANG_FLAGS += -fintegrated-as 290664684eSNathan Chancellorendif 300664684eSNathan Chancellor# By default, clang only warns when it encounters an unknown warning flag or 310664684eSNathan Chancellor# certain optimization flags it knows it has not implemented. 320664684eSNathan Chancellor# Make it behave more like gcc by erroring when these flags are encountered 336f5b41a2SNick Desaulniers# so they can be implemented or wrapped in cc-option. 340664684eSNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 35db1547c5SNathan ChancellorCLANG_FLAGS += -Werror=ignored-optimization-argument 36db1547c5SNathan ChancellorCLANG_FLAGS += -Werror=option-ignored 376f5b41a2SNick DesaulniersCLANG_FLAGS += -Werror=unused-command-line-argument 386f5b41a2SNick DesaulniersKBUILD_CPPFLAGS += $(CLANG_FLAGS) 396f5b41a2SNick Desaulniersexport CLANG_FLAGS 40