config.mk revision abf4bc916ab136eb1d5658632c63f950890f3eed
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 -Wno-clobbered \ 72 -fno-devirtualize \ 73 -fno-tree-sra \ 74 -fprefetch-loop-arrays \ 75 -funswitch-loops \ 76 -Wmaybe-uninitialized \ 77 -Wno-error=clobbered \ 78 -Wno-error=maybe-uninitialized \ 79 -Wno-error=unused-but-set-parameter \ 80 -Wno-error=unused-but-set-variable \ 81 -Wno-free-nonheap-object \ 82 -Wno-literal-suffix \ 83 -Wno-maybe-uninitialized \ 84 -Wno-old-style-declaration \ 85 -Wno-psabi \ 86 -Wno-unused-but-set-parameter \ 87 -Wno-unused-but-set-variable \ 88 -Wno-unused-local-typedefs \ 89 -Wunused-but-set-parameter \ 90 -Wunused-but-set-variable 91 92# Clang flags for all host rules 93CLANG_CONFIG_HOST_EXTRA_ASFLAGS := 94CLANG_CONFIG_HOST_EXTRA_CFLAGS := 95CLANG_CONFIG_HOST_EXTRA_CPPFLAGS := 96CLANG_CONFIG_HOST_EXTRA_LDFLAGS := 97 98# Clang flags for all target rules 99CLANG_CONFIG_TARGET_EXTRA_ASFLAGS := 100CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc 101CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc 102CLANG_CONFIG_TARGET_EXTRA_LDFLAGS := 103 104CLANG_DEFAULT_UB_CHECKS := \ 105 bool \ 106 integer-divide-by-zero \ 107 return \ 108 returns-nonnull-attribute \ 109 shift-exponent \ 110 unreachable \ 111 vla-bound \ 112 113# TODO(danalbert): The following checks currently have compiler performance 114# issues. 115# CLANG_DEFAULT_UB_CHECKS += alignment 116# CLANG_DEFAULT_UB_CHECKS += bounds 117# CLANG_DEFAULT_UB_CHECKS += enum 118# CLANG_DEFAULT_UB_CHECKS += float-cast-overflow 119# CLANG_DEFAULT_UB_CHECKS += float-divide-by-zero 120# CLANG_DEFAULT_UB_CHECKS += nonnull-attribute 121# CLANG_DEFAULT_UB_CHECKS += null 122# CLANG_DEFAULT_UB_CHECKS += shift-base 123# CLANG_DEFAULT_UB_CHECKS += signed-integer-overflow 124 125# TODO(danalbert): Fix UB in libc++'s __tree so we can turn this on. 126# https://llvm.org/PR19302 127# http://reviews.llvm.org/D6974 128# CLANG_DEFAULT_UB_CHECKS += object-size 129 130# HOST config 131clang_2nd_arch_prefix := 132include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk 133 134# HOST_2ND_ARCH config 135ifdef HOST_2ND_ARCH 136clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX) 137include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk 138endif 139 140# TARGET config 141clang_2nd_arch_prefix := 142include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk 143 144# TARGET_2ND_ARCH config 145ifdef TARGET_2ND_ARCH 146clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX) 147include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk 148endif 149 150ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fno-omit-frame-pointer 151ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit 152 153ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := 154ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan 155 156# This allows us to use the superset of functionality that compiler-rt 157# provides to Clang (for supporting features like -ftrapv). 158COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras 159 160ifeq ($(HOST_PREFER_32_BIT),true) 161# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source. 162FORCE_BUILD_LLVM_COMPONENTS := true 163endif 164