core/clang/config.mk

## Clang configurations.

LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_BASE)/linux-x86/$(LLVM_PREBUILTS_VERSION)/lib64/clang/$(LLVM_RELEASE_VERSION)/lib/linux/

define convert-to-clang-flags
$(strip $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(1)))
endef

CLANG_DEFAULT_UB_CHECKS := \
  bool \
  integer-divide-by-zero \
  return \
  returns-nonnull-attribute \
  shift-exponent \
  unreachable \
  vla-bound \

# TODO(danalbert): The following checks currently have compiler performance
# issues.
# CLANG_DEFAULT_UB_CHECKS += alignment
# CLANG_DEFAULT_UB_CHECKS += bounds
# CLANG_DEFAULT_UB_CHECKS += enum
# CLANG_DEFAULT_UB_CHECKS += float-cast-overflow
# CLANG_DEFAULT_UB_CHECKS += float-divide-by-zero
# CLANG_DEFAULT_UB_CHECKS += nonnull-attribute
# CLANG_DEFAULT_UB_CHECKS += null
# CLANG_DEFAULT_UB_CHECKS += shift-base
# CLANG_DEFAULT_UB_CHECKS += signed-integer-overflow

# TODO(danalbert): Fix UB in libc++'s __tree so we can turn this on.
# https://llvm.org/PR19302
# http://reviews.llvm.org/D6974
# CLANG_DEFAULT_UB_CHECKS += object-size

# HOST config
clang_2nd_arch_prefix :=
include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk

# HOST_2ND_ARCH config
ifdef HOST_2ND_ARCH
clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX)
include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk
endif

ifdef HOST_CROSS_ARCH
clang_2nd_arch_prefix :=
include $(BUILD_SYSTEM)/clang/HOST_CROSS_$(HOST_CROSS_ARCH).mk
ifdef HOST_CROSS_2ND_ARCH
clang_2nd_arch_prefix := $(HOST_CROSS_2ND_ARCH_VAR_PREFIX)
include $(BUILD_SYSTEM)/clang/HOST_CROSS_$(HOST_CROSS_2ND_ARCH).mk
endif
endif

# TARGET config
clang_2nd_arch_prefix :=
include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk

# TARGET_2ND_ARCH config
ifdef TARGET_2ND_ARCH
clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
endif

# 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

include $(BUILD_SYSTEM)/clang/tidy.mk