am aed49987: Merge "Allow clang to build host binaries." (b5fb7f24) · Commits · e / os / android_build

core/binary.mk

+37 −9

Original line number	Diff line number	Diff line
		@@ -118,9 +118,6 @@ endif

		my_compiler_dependencies :=
		ifeq ($(strip $(LOCAL_CLANG)),true)
		LOCAL_CFLAGS += $(CLANG_CONFIG_EXTRA_CFLAGS)
		LOCAL_ASFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
		LOCAL_LDFLAGS += $(CLANG_CONFIG_EXTRA_LDFLAGS)
		my_compiler_dependencies := $(CLANG) $(CLANG_CXX)
		endif

		@@ -162,16 +159,40 @@ my_target_c_includes := $(TARGET_C_INCLUDES)
		endif # LOCAL_SDK_VERSION

		ifeq ($(LOCAL_CLANG),true)
		my_target_global_cflags := $(TARGET_GLOBAL_CLANG_FLAGS)
		my_target_global_cflags := $(CLANG_TARGET_GLOBAL_CFLAGS)
		my_target_global_cppflags := $(CLANG_TARGET_GLOBAL_CPPFLAGS)
		my_target_global_ldflags := $(CLANG_TARGET_GLOBAL_LDFLAGS)
		my_target_c_includes += $(CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES)
		else
		my_target_global_cflags := $(TARGET_GLOBAL_CFLAGS)
		my_target_global_cppflags := $(TARGET_GLOBAL_CPPFLAGS)
		my_target_global_ldflags := $(TARGET_GLOBAL_LDFLAGS)
		endif # LOCAL_CLANG

		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_PROJECT_INCLUDES := $(my_target_project_includes)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_C_INCLUDES := $(my_target_c_includes)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_CFLAGS := $(my_target_global_cflags)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_CPPFLAGS := $(TARGET_GLOBAL_CPPFLAGS)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_CPPFLAGS := $(my_target_global_cppflags)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(my_target_global_ldflags)

		ifneq ($(strip $(LOCAL_IS_HOST_MODULE)),)
		ifeq ($(LOCAL_CLANG),true)
		my_host_global_cflags := $(CLANG_HOST_GLOBAL_CFLAGS)
		my_host_global_cppflags := $(CLANG_HOST_GLOBAL_CPPFLAGS)
		my_host_global_ldflags := $(CLANG_HOST_GLOBAL_LDFLAGS)
		my_host_c_includes := $(HOST_C_INCLUDES) $(CLANG_CONFIG_EXTRA_HOST_C_INCLUDES)
		else
		my_host_global_cflags := $(HOST_GLOBAL_CFLAGS)
		my_host_global_cppflags := $(HOST_GLOBAL_CPPFLAGS)
		my_host_global_ldflags := $(HOST_GLOBAL_LDFLAGS)
		my_host_c_includes := $(HOST_C_INCLUDES)
		endif # LOCAL_CLANG

		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_HOST_C_INCLUDES := $(my_host_c_includes)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_HOST_GLOBAL_CFLAGS := $(my_host_global_cflags)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_HOST_GLOBAL_CPPFLAGS := $(my_host_global_cppflags)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_HOST_GLOBAL_LDFLAGS := $(my_host_global_ldflags)
		endif # LOCAL_IS_HOST_MODULE

		###########################################################
		## Define PRIVATE_ variables used by multiple module types
		@@ -257,12 +278,11 @@ normal_objects_mode := $(if $(LOCAL_ARM_MODE),$(LOCAL_ARM_MODE),thumb)
		# Read the values from something like TARGET_arm_CFLAGS or
		# TARGET_thumb_CFLAGS. HOST_(arm\|thumb)_CFLAGS values aren't
		# actually used (although they are usually empty).
		ifeq ($(strip $(LOCAL_CLANG)),true)
		arm_objects_cflags := $($(my_prefix)$(arm_objects_mode)_CLANG_CFLAGS)
		normal_objects_cflags := $($(my_prefix)$(normal_objects_mode)_CLANG_CFLAGS)
		else
		arm_objects_cflags := $($(my_prefix)$(arm_objects_mode)_CFLAGS)
		normal_objects_cflags := $($(my_prefix)$(normal_objects_mode)_CFLAGS)
		ifeq ($(strip $(LOCAL_CLANG)),true)
		arm_objects_cflags := $(call convert-to-$(my_host)clang-flags,$(arm_objects_cflags))
		normal_objects_cflags := $(call convert-to-$(my_host)clang-flags,$(normal_objects_cflags))
		endif

		else
		@@ -751,6 +771,14 @@ endif
		###########################################################
		# Rule-specific variable definitions
		###########################################################

		ifeq ($(LOCAL_CLANG),true)
		LOCAL_CFLAGS := $(call convert-to-$(my_host)clang-flags,$(LOCAL_CFLAGS))
		LOCAL_CPPFLAGS := $(call convert-to-$(my_host)clang-flags,$(LOCAL_CPPFLAGS))
		LOCAL_ASFLAGS := $(call convert-to-$(my_host)clang-flags,$(LOCAL_ASFLAGS))
		LOCAL_LDFLAGS := $(call convert-to-$(my_host)clang-flags,$(LOCAL_LDFLAGS))
		endif

		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_YACCFLAGS := $(LOCAL_YACCFLAGS)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_ASFLAGS := $(LOCAL_ASFLAGS)
		$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CONLYFLAGS := $(LOCAL_CONLYFLAGS)

core/definitions.mk

+7 −7

Original line number	Diff line number	Diff line
		@@ -1032,11 +1032,11 @@ $(hide) $(PRIVATE_CXX) \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(filter-out $(PRIVATE_C_INCLUDES), \
		$(HOST_PROJECT_INCLUDES) \
		$(HOST_C_INCLUDES)))) \
		$(PRIVATE_HOST_C_INCLUDES)))) \
		-c \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(HOST_GLOBAL_CFLAGS) \
		$(HOST_GLOBAL_CPPFLAGS) \
		$(PRIVATE_HOST_GLOBAL_CFLAGS) \
		$(PRIVATE_HOST_GLOBAL_CPPFLAGS) \
		) \
		$(PRIVATE_CFLAGS) \
		$(PRIVATE_CPPFLAGS) \
		@@ -1060,10 +1060,10 @@ $(hide) $(PRIVATE_CC) \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(filter-out $(PRIVATE_C_INCLUDES), \
		$(HOST_PROJECT_INCLUDES) \
		$(HOST_C_INCLUDES)))) \
		$(PRIVATE_HOST_C_INCLUDES)))) \
		-c \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(HOST_GLOBAL_CFLAGS) \
		$(PRIVATE_HOST_GLOBAL_CFLAGS) \
		) \
		$(1) \
		-MD -MF $(patsubst %.o,%.d,$@) -o $@ $<
		@@ -1207,7 +1207,7 @@ $(hide) $(PRIVATE_CXX) \
		$(PRIVATE_LDFLAGS) \
		$(HOST_GLOBAL_LD_DIRS) \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(HOST_GLOBAL_LDFLAGS) \
		$(PRIVATE_HOST_GLOBAL_LDFLAGS) \
		) \
		$(PRIVATE_ALL_OBJECTS) \
		-Wl,--whole-archive \
		@@ -1367,7 +1367,7 @@ $(hide) $(PRIVATE_CXX) \
		$(HOST_GLOBAL_LD_DIRS) \
		$(PRIVATE_LDFLAGS) \
		$(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
		$(HOST_GLOBAL_LDFLAGS) \
		$(PRIVATE_HOST_GLOBAL_LDFLAGS) \
		-fPIE -pie \
		) \
		-o $@ \

core/executable.mk

+4 −0

Original line number	Diff line number	Diff line
		@@ -39,7 +39,11 @@ include $(BUILD_SYSTEM)/dynamic_binary.mk

		# Define PRIVATE_ variables from global vars
		my_target_global_ld_dirs := $(TARGET_GLOBAL_LD_DIRS)
		ifeq ($(LOCAL_CLANG),true)
		my_target_global_ldflags := $(CLANG_TARGET_GLOBAL_LDFLAGS)
		else
		my_target_global_ldflags := $(TARGET_GLOBAL_LDFLAGS)
		endif
		my_target_fdo_lib := $(TARGET_FDO_LIB)
		my_target_libgcc := $(TARGET_LIBGCC)
		my_target_crtbegin_dynamic_o := $(TARGET_CRTBEGIN_DYNAMIC_O)

core/llvm_config.mk

+168 −106

Original line number	Diff line number	Diff line
		@@ -3,35 +3,39 @@ CLANG_CXX := $(HOST_OUT_EXECUTABLES)/clang++$(HOST_EXECUTABLE_SUFFIX)
		LLVM_AS := $(HOST_OUT_EXECUTABLES)/llvm-as$(HOST_EXECUTABLE_SUFFIX)
		LLVM_LINK := $(HOST_OUT_EXECUTABLES)/llvm-link$(HOST_EXECUTABLE_SUFFIX)

		define do-clang-flags-subst
		TARGET_GLOBAL_CLANG_FLAGS := $(subst $(1),$(2),$(TARGET_GLOBAL_CLANG_FLAGS))
		HOST_GLOBAL_CLANG_FLAGS := $(subst $(1),$(2),$(HOST_GLOBAL_CLANG_FLAGS))
		endef

		define clang-flags-subst
		$(eval $(call do-clang-flags-subst,$(1),$(2)))
		endef

		# Clang flags for all host or target rules
		CLANG_CONFIG_EXTRA_ASFLAGS :=
		CLANG_CONFIG_EXTRA_CPPFLAGS :=
		CLANG_CONFIG_EXTRA_LDFLAGS :=

		CLANG_CONFIG_EXTRA_CFLAGS := \
		-D__compiler_offsetof=__builtin_offsetof \
		-D__compiler_offsetof=__builtin_offsetof

		CLANG_CONFIG_UNKNOWN_CFLAGS := \
		-funswitch-loops
		-funswitch-loops \
		-Wno-psabi \
		-Wno-unused-but-set-variable \
		-Wno-unused-but-set-parameter

		ifeq ($(TARGET_ARCH),arm)
		RS_TRIPLE := armv7-none-linux-gnueabi
		CLANG_CONFIG_EXTRA_ASFLAGS += \
		-target arm-linux-androideabi \
		-nostdlibinc \
		-B$(TARGET_TOOLCHAIN_ROOT)/arm-linux-androideabi/bin
		CLANG_CONFIG_EXTRA_CFLAGS += \
		$(CLANG_CONFIG_EXTRA_ASFLAGS) \
		# Clang flags for all host rules
		CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
		CLANG_CONFIG_HOST_EXTRA_CFLAGS :=
		CLANG_CONFIG_HOST_EXTRA_CPPFLAGS :=
		CLANG_CONFIG_HOST_EXTRA_LDFLAGS :=

		# Clang flags for all target rules
		CLANG_CONFIG_TARGET_EXTRA_ASFLAGS :=
		CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc
		CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc
		CLANG_CONFIG_TARGET_EXTRA_LDFLAGS :=

		# ARM
		llvm_arch := arm
		CLANG_CONFIG_arm_EXTRA_ASFLAGS :=
		CLANG_CONFIG_arm_EXTRA_CFLAGS := \
		-mllvm -arm-enable-ehabi
		CLANG_CONFIG_EXTRA_LDFLAGS += \
		-target arm-linux-androideabi \
		-B$(TARGET_TOOLCHAIN_ROOT)/arm-linux-androideabi/bin
		CLANG_CONFIG_UNKNOWN_CFLAGS += \
		CLANG_CONFIG_arm_EXTRA_LDFLAGS :=
		CLANG_CONFIG_arm_UNKNOWN_CFLAGS := \
		-mthumb-interwork \
		-fgcse-after-reload \
		-frerun-cse-after-loop \
		@@ -40,18 +44,18 @@ ifeq ($(TARGET_ARCH),arm)
		-fno-strict-volatile-bitfields \
		-fno-align-jumps \
		-Wa,--noexecstack
		endif
		ifeq ($(TARGET_ARCH),mips)
		RS_TRIPLE := mipsel-unknown-linux
		CLANG_CONFIG_EXTRA_ASFLAGS += \
		-target mipsel-linux-androideabi \
		-nostdlibinc \
		-B$(TARGET_TOOLCHAIN_ROOT)/mipsel-linux-android/bin
		CLANG_CONFIG_EXTRA_CFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
		CLANG_CONFIG_EXTRA_LDFLAGS += \
		-target mipsel-linux-androideabi \
		-B$(TARGET_TOOLCHAIN_ROOT)/mipsel-linux-android/bin
		CLANG_CONFIG_UNKNOWN_CFLAGS += \

		CLANG_CONFIG_arm_HOST_TRIPLE :=
		CLANG_CONFIG_arm_TARGET_TRIPLE := arm-linux-androideabi

		include $(BUILD_SYSTEM)/llvm_config_define_clang_flags.mk

		# MIPS
		llvm_arch := mips
		CLANG_CONFIG_mips_EXTRA_ASFLAGS :=
		CLANG_CONFIG_mips_EXTRA_CFLAGS :=
		CLANG_CONFIG_mips_EXTRA_LDFLAGS :=
		CLANG_CONFIG_mips_UNKNOWN_CFLAGS := \
		-EL \
		-mips32 \
		-mips32r2 \
		@@ -66,64 +70,69 @@ ifeq ($(TARGET_ARCH),mips)
		-mtune=mips32 \
		-msynci \
		-mno-fused-madd
		endif
		ifeq ($(TARGET_ARCH),x86)
		RS_TRIPLE := i686-unknown-linux
		CLANG_CONFIG_EXTRA_ASFLAGS += \
		-target i686-linux-android \
		-msse3 \
		-nostdlibinc \
		-B$(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
		CLANG_CONFIG_EXTRA_CFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
		CLANG_CONFIG_EXTRA_LDFLAGS += \
		-target i686-linux-android \
		-B$(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
		CLANG_CONFIG_UNKNOWN_CFLAGS += \

		CLANG_CONFIG_mips_HOST_TRIPLE :=
		CLANG_CONFIG_mips_TARGET_TRIPLE := mipsel-linux-android

		include $(BUILD_SYSTEM)/llvm_config_define_clang_flags.mk

		# X86
		llvm_arch := x86
		CLANG_CONFIG_x86_EXTRA_ASFLAGS := \
		-msse3
		CLANG_CONFIG_x86_EXTRA_CFLAGS :=
		CLANG_CONFIG_x86_EXTRA_LDFLAGS :=
		CLANG_CONFIG_x86_UNKNOWN_CFLAGS := \
		-finline-limit=300 \
		-fno-inline-functions-called-once \
		-mfpmath=sse \
		-mbionic

		ifeq ($(HOST_OS),linux)
		CLANG_CONFIG_x86_HOST_TRIPLE := i686-linux-gnu
		endif
		ifeq ($(TARGET_ARCH),x86_64)
		RS_TRIPLE := x86_64-unknown-linux
		CLANG_CONFIG_EXTRA_ASFLAGS += \
		-target x86_64-linux-android \
		-nostdlibinc \
		-B$(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
		CLANG_CONFIG_EXTRA_CFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
		CLANG_CONFIG_EXTRA_LDFLAGS += \
		-target x86_64-linux-android \
		-B$(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin
		CLANG_CONFIG_UNKNOWN_CFLAGS += \
		ifeq ($(HOST_OS),darwin)
		CLANG_CONFIG_x86_HOST_TRIPLE := i686-apple-darwin
		endif
		ifeq ($(HOST_OS),windows)
		CLANG_CONFIG_x86_HOST_TRIPLE := i686-pc-mingw32
		endif

		CLANG_CONFIG_x86_TARGET_TRIPLE := i686-linux-android
		CLANG_CONFIG_x86_TARGET_TOOLCHAIN_PREFIX := \
		$(TARGET_TOOLCHAIN_ROOT)/x86_64-linux-android/bin

		include $(BUILD_SYSTEM)/llvm_config_define_clang_flags.mk

		# X86_64
		llvm_arch := x86_64
		CLANG_CONFIG_x86_64_EXTRA_ASFLAGS := \
		CLANG_CONFIG_x86_64_EXTRA_CFLAGS :=
		CLANG_CONFIG_x86_64_EXTRA_LDFLAGS := \
		CLANG_CONFIG_x86_64_UNKNOWN_CFLAGS := \
		-finline-limit=300 \
		-fno-inline-functions-called-once \
		-mfpmath=sse \
		-mbionic

		ifeq ($(HOST_OS),linux)
		CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-linux-gnu
		endif
		ifeq ($(HOST_OS),darwin)
		CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-apple-darwin
		endif
		ifeq ($(HOST_OS),windows)
		CLANG_CONFIG_x86_64_HOST_TRIPLE := x86_64-pc-mingw64
		endif
		CLANG_CONFIG_x86_64_TARGET_TRIPLE := x86_64-linux-android

		include $(BUILD_SYSTEM)/llvm_config_define_clang_flags.mk

		# Clang compiler-specific libc headers
		CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := external/clang/lib/include
		CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := external/clang/lib/include $(TARGET_OUT_HEADERS)/clang

		# remove unknown flags to define CLANG_FLAGS
		TARGET_GLOBAL_CLANG_FLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_GLOBAL_CFLAGS))
		HOST_GLOBAL_CLANG_FLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(HOST_GLOBAL_CFLAGS))

		TARGET_arm_CLANG_CFLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_arm_CFLAGS))
		TARGET_thumb_CLANG_CFLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_thumb_CFLAGS))

		# llvm does not yet support -march=armv5e nor -march=armv5te, fall back to armv5 or armv5t
		$(call clang-flags-subst,-march=armv5te,-march=armv5t)
		$(call clang-flags-subst,-march=armv5e,-march=armv5)

		# clang does not support -Wno-psabi, -Wno-unused-but-set-variable, and
		# -Wno-unused-but-set-parameter
		$(call clang-flags-subst,-Wno-psabi,)
		$(call clang-flags-subst,-Wno-unused-but-set-variable,)
		$(call clang-flags-subst,-Wno-unused-but-set-parameter,)

		# clang does not support -mcpu=cortex-a15 yet - fall back to armv7-a for now
		$(call clang-flags-subst,-mcpu=cortex-a15,-march=armv7-a)

		# Address sanitizer clang config
		ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address
		ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
		ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl libasan_preload
		@@ -132,3 +141,56 @@ ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
		# This allows us to use the superset of functionality that compiler-rt
		# provides to Clang (for supporting features like -ftrapv).
		COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras

		# Macros to convert gcc flags to clang flags
		define subst-clang-incompatible-flags
		$(subst -march=armv5te,-march=armv5t,\
		$(subst -march=armv5e,-march=armv5,\
		$(subst -mcpu=cortex-a15,-march=armv7-a,\
		$(1))))
		endef

		define convert-to-host-clang-flags
		$(strip \
		$(call subst-clang-incompatible-flags,\
		$(filter-out $(CLANG_CONFIG_$(HOST_ARCH)_UNKNOWN_CFLAGS),\
		$(1))))
		endef

		define convert-to-clang-flags
		$(strip \
		$(call subst-clang-incompatible-flags,\
		$(filter-out $(CLANG_CONFIG_$(TARGET_ARCH)_UNKNOWN_CFLAGS),\
		$(1))))
		endef

		# Define clang global flags
		define get-clang-host-global-flags
		$(call convert-to-host-clang-flags,$(HOST_GLOBAL_$(1))) $(CLANG_CONFIG_$(HOST_ARCH)_HOST_EXTRA_$(1))
		endef

		define get-clang-global-flags
		$(call convert-to-clang-flags,$(TARGET_GLOBAL_$(1))) $(CLANG_CONFIG_$(TARGET_ARCH)_TARGET_EXTRA_$(1))
		endef

		CLANG_HOST_GLOBAL_CFLAGS := $(call get-clang-host-global-flags,CFLAGS)
		CLANG_HOST_GLOBAL_CPPFLAGS := $(call get-clang-host-global-flags,CPPFLAGS)
		CLANG_HOST_GLOBAL_LDFLAGS := $(call get-clang-host-global-flags,LDFLAGS)

		CLANG_TARGET_GLOBAL_CFLAGS := $(call get-clang-global-flags,CFLAGS)
		CLANG_TARGET_GLOBAL_CPPFLAGS := $(call get-clang-global-flags,CPPFLAGS)
		CLANG_TARGET_GLOBAL_LDFLAGS := $(call get-clang-global-flags,LDFLAGS)

		# Renderscript clang target triple
		ifeq ($(TARGET_ARCH),arm)
		RS_TRIPLE := armv7-none-linux-gnueabi
		endif
		ifeq ($(TARGET_ARCH),mips)
		RS_TRIPLE := mipsel-unknown-linux
		endif
		ifeq ($(TARGET_ARCH),x86)
		RS_TRIPLE := i686-unknown-linux
		endif
		ifeq ($(TARGET_ARCH),x86_64)
		RS_TRIPLE := x86_64-unknown-linux
		endif

core/llvm_config_define_clang_flags.mk

0 → 100644

+76 −0

Original line number	Diff line number	Diff line
		ifeq ($(strip $(llvm_arch)),)
		$(error "$$(llvm_arch) should be defined.")
		endif

		ifeq ($(strip $(CLANG_CONFIG_$(llvm_arch)_TARGET_TRIPLE)),)
		$(error "$$(CLANG_CONFIG_$(llvm_arch)_TARGET_TRIPLE) should be defined.")
		endif

		ifeq ($(strip $(CLANG_CONFIG_$(llvm_arch)_TARGET_TOOLCHAIN_PREFIX)),)
		CLANG_CONFIG_$(llvm_arch)_TARGET_TOOLCHAIN_PREFIX := \
		$(TARGET_TOOLCHAIN_ROOT)/$(CLANG_CONFIG_$(llvm_arch)_TARGET_TRIPLE)/bin
		endif

		# Include common unknown flags
		CLANG_CONFIG_$(llvm_arch)_UNKNOWN_CFLAGS += \
		$(CLANG_CONFIG_UNKNOWN_CFLAGS)

		# Clang extra flags for host
		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_ASFLAGS := \
		$(CLANG_CONFIG_EXTRA_ASFLAGS) \
		$(CLANG_CONFIG_HOST_EXTRA_ASFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_ASFLAGS)

		ifneq ($(strip $(CLANG_CONFIG_$(llvm_arch)_HOST_TRIPLE)),)
		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_ASFLAGS += \
		-target $(CLANG_CONFIG_$(llvm_arch)_HOST_TRIPLE)
		endif

		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_CFLAGS := \
		$(CLANG_CONFIG_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_HOST_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_ASFLAGS)

		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_CPPFLAGS := \
		$(CLANG_CONFIG_EXTRA_CPPFLAGS) \
		$(CLANG_CONFIG_HOST_EXTRA_CPPFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_CPPFLAGS)

		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_LDFLAGS := \
		$(CLANG_CONFIG_EXTRA_LDFLAGS) \
		$(CLANG_CONFIG_HOST_EXTRA_LDFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_LDFLAGS)

		ifneq ($(strip $(CLANG_CONFIG_$(llvm_arch)_HOST_TRIPLE)),)
		CLANG_CONFIG_$(llvm_arch)_HOST_EXTRA_LDFLAGS += \
		-target $(CLANG_CONFIG_$(llvm_arch)_HOST_TRIPLE)
		endif

		# Clang extra flags for target
		CLANG_CONFIG_$(llvm_arch)_TARGET_EXTRA_ASFLAGS := \
		$(CLANG_CONFIG_EXTRA_ASFLAGS) \
		$(CLANG_CONFIG_TARGET_EXTRA_ASFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_ASFLAGS) \
		-target $(CLANG_CONFIG_$(llvm_arch)_TARGET_TRIPLE) \
		-B$(CLANG_CONFIG_$(llvm_arch)_TARGET_TOOLCHAIN_PREFIX)

		CLANG_CONFIG_$(llvm_arch)_TARGET_EXTRA_CFLAGS := \
		$(CLANG_CONFIG_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_TARGET_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_CFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_TARGET_EXTRA_ASFLAGS)

		CLANG_CONFIG_$(llvm_arch)_TARGET_EXTRA_CPPFLAGS := \
		$(CLANG_CONFIG_EXTRA_CPPFLAGS) \
		$(CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_CPPFLAGS)

		CLANG_CONFIG_$(llvm_arch)_TARGET_EXTRA_LDFLAGS := \
		$(CLANG_CONFIG_EXTRA_LDFLAGS) \
		$(CLANG_CONFIG_TARGET_EXTRA_LDFLAGS) \
		$(CLANG_CONFIG_$(llvm_arch)_EXTRA_LDFLAGS) \
		-target $(CLANG_CONFIG_$(llvm_arch)_TARGET_TRIPLE) \
		-B$(CLANG_CONFIG_$(llvm_arch)_TARGET_TOOLCHAIN_PREFIX)

		llvm_arch :=