1332828b6e
Bug: 23396112 Switch from "-fsanitize-undefined-trap-on-error" to "-fsanitize-trap=all". The former ends up accidentally leaving unresolved calls to __ubsan* helper functions in the object file with clang 3.8. The latter is used when we don't include address sanitizer, and replaces any misbehavior with a direct call to abort(). Change-Id: I8a67461b45f5f1dd9f2d179b6b64a4ca905e999f
162 lines
5.1 KiB
Makefile
162 lines
5.1 KiB
Makefile
## Clang configurations.
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LLVM_PREBUILTS_VERSION := 3.8
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LLVM_PREBUILTS_PATH := prebuilts/clang/host/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)/bin
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LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib/clang/$(LLVM_PREBUILTS_VERSION)/lib/linux/
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CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
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CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)
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LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX)
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LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX)
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CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
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LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX)
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# Clang flags for all host or target rules
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CLANG_CONFIG_EXTRA_ASFLAGS :=
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CLANG_CONFIG_EXTRA_CFLAGS :=
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CLANG_CONFIG_EXTRA_CONLYFLAGS := -std=gnu99
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CLANG_CONFIG_EXTRA_CPPFLAGS :=
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CLANG_CONFIG_EXTRA_LDFLAGS :=
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-D__compiler_offsetof=__builtin_offsetof
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# Help catch common 32/64-bit errors.
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-Werror=int-conversion
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# Disable overly aggressive warning for macros defined with a leading underscore
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# This used to happen in AndroidConfig.h, which was included everywhere.
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# TODO: can we remove this now?
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-Wno-reserved-id-macro
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# Disable overly aggressive warning for format strings.
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# Bug: 20148343
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-Wno-format-pedantic
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# Workaround for ccache with clang.
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# See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-Wno-unused-command-line-argument
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# Disable -Winconsistent-missing-override until we can clean up the existing
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# codebase for it.
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CLANG_CONFIG_EXTRA_CPPFLAGS += \
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-Wno-inconsistent-missing-override
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# Force clang to always output color diagnostics. Ninja will strip the ANSI
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# color codes if it is not running in a terminal.
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CLANG_CONFIG_EXTRA_CFLAGS += \
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-fcolor-diagnostics
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CLANG_CONFIG_UNKNOWN_CFLAGS := \
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-finline-functions \
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-finline-limit=64 \
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-fno-canonical-system-headers \
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-Wno-clobbered \
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-fno-devirtualize \
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-fno-tree-sra \
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-fprefetch-loop-arrays \
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-funswitch-loops \
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-Wmaybe-uninitialized \
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-Wno-error=clobbered \
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-Wno-error=maybe-uninitialized \
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-Wno-error=unused-but-set-parameter \
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-Wno-error=unused-but-set-variable \
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-Wno-free-nonheap-object \
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-Wno-literal-suffix \
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-Wno-maybe-uninitialized \
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-Wno-old-style-declaration \
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-Wno-psabi \
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-Wno-unused-but-set-parameter \
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-Wno-unused-but-set-variable \
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-Wno-unused-local-typedefs \
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-Wunused-but-set-parameter \
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-Wunused-but-set-variable \
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-fdiagnostics-color
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# Clang flags for all host rules
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CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
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CLANG_CONFIG_HOST_EXTRA_CFLAGS :=
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CLANG_CONFIG_HOST_EXTRA_CPPFLAGS :=
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CLANG_CONFIG_HOST_EXTRA_LDFLAGS :=
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# Clang flags for all host cross rules
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CLANG_CONFIG_HOST_CROSS_EXTRA_ASFLAGS :=
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CLANG_CONFIG_HOST_CROSS_EXTRA_CFLAGS :=
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CLANG_CONFIG_HOST_CROSS_EXTRA_CPPFLAGS :=
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CLANG_CONFIG_HOST_CROSS_EXTRA_LDFLAGS :=
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# Clang flags for all target rules
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CLANG_CONFIG_TARGET_EXTRA_ASFLAGS :=
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CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc
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CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc
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CLANG_CONFIG_TARGET_EXTRA_LDFLAGS :=
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CLANG_DEFAULT_UB_CHECKS := \
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bool \
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integer-divide-by-zero \
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return \
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returns-nonnull-attribute \
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shift-exponent \
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unreachable \
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vla-bound \
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# TODO(danalbert): The following checks currently have compiler performance
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# issues.
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# CLANG_DEFAULT_UB_CHECKS += alignment
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# CLANG_DEFAULT_UB_CHECKS += bounds
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# CLANG_DEFAULT_UB_CHECKS += enum
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# CLANG_DEFAULT_UB_CHECKS += float-cast-overflow
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# CLANG_DEFAULT_UB_CHECKS += float-divide-by-zero
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# CLANG_DEFAULT_UB_CHECKS += nonnull-attribute
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# CLANG_DEFAULT_UB_CHECKS += null
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# CLANG_DEFAULT_UB_CHECKS += shift-base
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# CLANG_DEFAULT_UB_CHECKS += signed-integer-overflow
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# TODO(danalbert): Fix UB in libc++'s __tree so we can turn this on.
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# https://llvm.org/PR19302
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# http://reviews.llvm.org/D6974
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# CLANG_DEFAULT_UB_CHECKS += object-size
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# HOST config
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clang_2nd_arch_prefix :=
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include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk
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# HOST_2ND_ARCH config
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ifdef HOST_2ND_ARCH
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clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX)
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include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk
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endif
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ifdef HOST_CROSS_OS
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include $(BUILD_SYSTEM)/clang/HOST_CROSS_$(HOST_CROSS_OS).mk
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endif
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# TARGET config
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clang_2nd_arch_prefix :=
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include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk
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# TARGET_2ND_ARCH config
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ifdef TARGET_2ND_ARCH
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clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
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include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
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endif
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ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fno-omit-frame-pointer
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ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
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ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES :=
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ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
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# This allows us to use the superset of functionality that compiler-rt
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# provides to Clang (for supporting features like -ftrapv).
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COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras
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ifeq ($(HOST_PREFER_32_BIT),true)
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# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source.
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FORCE_BUILD_LLVM_COMPONENTS := true
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endif
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