48f239c94f
GCC know a few pre-defined paths (relative to its location) to search for headers, libraries, program, etc. By default GCC prefixes its own path(argv[0]) and calls realpath() which result in absolute path with all symlink, . and .. removed. It's usually good to have canonicalised paths, but absolute paths in *.d file can cause unnecessary relinking when stale entries in ccache cache hit Add -no-canonical-prefixes (gcc>=4.6) and -fno-canonical-system-headers (gcc>4.6) to disable realpath() on prefixed paths Change-Id: I58d739e61fb013015fb05a9c98b2132b307f915a
80 lines
2.6 KiB
Makefile
80 lines
2.6 KiB
Makefile
## Clang configurations.
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# WITHOUT_CLANG covers both HOST and TARGET
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ifeq ($(WITHOUT_CLANG),true)
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WITHOUT_TARGET_CLANG := true
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WITHOUT_HOST_CLANG := true
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endif
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LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.5/bin
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LLVM_PREBUILTS_HEADER_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/3.5/lib/clang/3.5/include/
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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 := $(HOST_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
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TBLGEN := $(HOST_OUT_EXECUTABLES)/tblgen$(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_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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CLANG_CONFIG_UNKNOWN_CFLAGS := \
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-funswitch-loops \
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-Wno-psabi \
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-Wno-unused-but-set-variable \
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-Wno-unused-but-set-parameter \
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-fno-canonical-system-headers
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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 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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# HOST config
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ifneq ($(strip $(BUILD_HOST_64bit)),)
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include $(BUILD_SYSTEM)/clang/HOST_x86_64.mk
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else
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include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).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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# Clang compiler-specific libc headers
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CLANG_CONFIG_EXTRA_HOST_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH)
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CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := $(LLVM_PREBUILTS_HEADER_PATH) $(TARGET_OUT_HEADERS)/clang
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# Address sanitizer clang config
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ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address
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ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
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ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl libasan_preload
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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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