config.mk revision f0b15e173be354301fa38354d016211192e36460
1## Clang configurations. 2 3# WITHOUT_CLANG covers both HOST and TARGET 4ifeq ($(WITHOUT_CLANG),true) 5WITHOUT_TARGET_CLANG := true 6WITHOUT_HOST_CLANG := true 7endif 8 9LLVM_PREBUILTS_VERSION := 3.6 10LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/$(LLVM_PREBUILTS_VERSION)/bin 11LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib/clang/$(LLVM_PREBUILTS_VERSION)/lib/linux/ 12 13CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX) 14CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX) 15LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX) 16LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX) 17 18CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX) 19LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX) 20 21# The C/C++ compiler can be wrapped by setting the CC/CXX_WRAPPER vars. 22ifdef CC_WRAPPER 23 ifneq ($(CC_WRAPPER),$(firstword $(CLANG))) 24 CLANG := $(CC_WRAPPER) $(CLANG) 25 endif 26endif 27ifdef CXX_WRAPPER 28 ifneq ($(CXX_WRAPPER),$(firstword $(CLANG_CXX))) 29 CLANG_CXX := $(CXX_WRAPPER) $(CLANG_CXX) 30 endif 31endif 32 33# Clang flags for all host or target rules 34CLANG_CONFIG_EXTRA_ASFLAGS := 35CLANG_CONFIG_EXTRA_CFLAGS := 36CLANG_CONFIG_EXTRA_CONLYFLAGS := -std=gnu99 37CLANG_CONFIG_EXTRA_CPPFLAGS := 38CLANG_CONFIG_EXTRA_LDFLAGS := 39 40CLANG_CONFIG_EXTRA_CFLAGS += \ 41 -D__compiler_offsetof=__builtin_offsetof 42 43# Help catch common 32/64-bit errors. 44CLANG_CONFIG_EXTRA_CFLAGS += \ 45 -Werror=int-conversion 46 47# Disable overly aggressive warning for macros defined with a leading underscore 48# This happens in AndroidConfig.h, which is included nearly everywhere. 49CLANG_CONFIG_EXTRA_CFLAGS += \ 50 -Wno-reserved-id-macro 51 52# Disable overly aggressive warning for format strings. 53# Bug: 20148343 54CLANG_CONFIG_EXTRA_CFLAGS += \ 55 -Wno-format-pedantic 56 57# Workaround for ccache with clang. 58# See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html. 59CLANG_CONFIG_EXTRA_CFLAGS += \ 60 -Wno-unused-command-line-argument 61 62# Disable -Winconsistent-missing-override until we can clean up the existing 63# codebase for it. 64CLANG_CONFIG_EXTRA_CPPFLAGS += \ 65 -Wno-inconsistent-missing-override 66 67CLANG_CONFIG_UNKNOWN_CFLAGS := \ 68 -finline-functions \ 69 -finline-limit=64 \ 70 -fno-canonical-system-headers \ 71 -fno-tree-sra \ 72 -fprefetch-loop-arrays \ 73 -funswitch-loops \ 74 -Wmaybe-uninitialized \ 75 -Wno-error=maybe-uninitialized \ 76 -Wno-error=unused-but-set-parameter \ 77 -Wno-error=unused-but-set-variable \ 78 -Wno-free-nonheap-object \ 79 -Wno-literal-suffix \ 80 -Wno-maybe-uninitialized \ 81 -Wno-old-style-declaration \ 82 -Wno-psabi \ 83 -Wno-unused-but-set-parameter \ 84 -Wno-unused-but-set-variable \ 85 -Wno-unused-local-typedefs \ 86 -Wunused-but-set-parameter \ 87 -Wunused-but-set-variable 88 89# Clang flags for all host rules 90CLANG_CONFIG_HOST_EXTRA_ASFLAGS := 91CLANG_CONFIG_HOST_EXTRA_CFLAGS := 92CLANG_CONFIG_HOST_EXTRA_CPPFLAGS := 93CLANG_CONFIG_HOST_EXTRA_LDFLAGS := 94 95# Clang flags for all target rules 96CLANG_CONFIG_TARGET_EXTRA_ASFLAGS := 97CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc 98CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc 99CLANG_CONFIG_TARGET_EXTRA_LDFLAGS := 100 101CLANG_DEFAULT_UB_CHECKS := \ 102 bool \ 103 integer-divide-by-zero \ 104 return \ 105 returns-nonnull-attribute \ 106 shift-exponent \ 107 unreachable \ 108 vla-bound \ 109 110# TODO(danalbert): The following checks currently have compiler performance 111# issues. 112# CLANG_DEFAULT_UB_CHECKS += alignment 113# CLANG_DEFAULT_UB_CHECKS += bounds 114# CLANG_DEFAULT_UB_CHECKS += enum 115# CLANG_DEFAULT_UB_CHECKS += float-cast-overflow 116# CLANG_DEFAULT_UB_CHECKS += float-divide-by-zero 117# CLANG_DEFAULT_UB_CHECKS += nonnull-attribute 118# CLANG_DEFAULT_UB_CHECKS += null 119# CLANG_DEFAULT_UB_CHECKS += shift-base 120# CLANG_DEFAULT_UB_CHECKS += signed-integer-overflow 121 122# TODO(danalbert): Fix UB in libc++'s __tree so we can turn this on. 123# https://llvm.org/PR19302 124# http://reviews.llvm.org/D6974 125# CLANG_DEFAULT_UB_CHECKS += object-size 126 127# HOST config 128clang_2nd_arch_prefix := 129include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk 130 131# HOST_2ND_ARCH config 132ifdef HOST_2ND_ARCH 133clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX) 134include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk 135endif 136 137# TARGET config 138clang_2nd_arch_prefix := 139include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk 140 141# TARGET_2ND_ARCH config 142ifdef TARGET_2ND_ARCH 143clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX) 144include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk 145endif 146 147ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fno-omit-frame-pointer 148ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit 149 150ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl 151ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan 152 153# This allows us to use the superset of functionality that compiler-rt 154# provides to Clang (for supporting features like -ftrapv). 155COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras 156 157ifeq ($(HOST_PREFER_32_BIT),true) 158# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source. 159FORCE_BUILD_LLVM_COMPONENTS := true 160endif 161