Switch to LLVM 3.4 prebuilts in AOSP.

ifeq (true,$(FORCE_BUILD_LLVM_COMPONENTS))

LLVM_PREBUILTS_PATH := $(BUILD_OUT_EXECUTABLES)

LLVM_PREBUILTS_HEADER_PATH := external/clang/lib/include

else

LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.4/bin

LLVM_PREBUILTS_HEADER_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.4/lib/clang/3.4/include/

endif

CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)

CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)

CLANG_TBLGEN := $(LLVM_PREBUILTS_PATH)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)

LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX)

LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX)

TBLGEN := $(LLVM_PREBUILTS_PATH)/tblgen$(BUILD_EXECUTABLE_SUFFIX)

CLANG := $(HOST_OUT_EXECUTABLES)/clang$(HOST_EXECUTABLE_SUFFIX)

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)

# Clang flags for all host or target rules

CLANG_CONFIG_EXTRA_ASFLAGS :=

# 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

CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH)

CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH) $(TARGET_OUT_HEADERS)/clang

# Address sanitizer clang config

ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address