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      1 CLANG := $(HOST_OUT_EXECUTABLES)/clang$(HOST_EXECUTABLE_SUFFIX)
      2 CLANG_CXX := $(HOST_OUT_EXECUTABLES)/clang++$(HOST_EXECUTABLE_SUFFIX)
      3 LLVM_AS := $(HOST_OUT_EXECUTABLES)/llvm-as$(HOST_EXECUTABLE_SUFFIX)
      4 LLVM_LINK := $(HOST_OUT_EXECUTABLES)/llvm-link$(HOST_EXECUTABLE_SUFFIX)
      5 
      6 define do-clang-flags-subst
      7   TARGET_GLOBAL_CLANG_FLAGS := $(subst $(1),$(2),$(TARGET_GLOBAL_CLANG_FLAGS))
      8   HOST_GLOBAL_CLANG_FLAGS := $(subst $(1),$(2),$(HOST_GLOBAL_CLANG_FLAGS))
      9 endef
     10 
     11 define clang-flags-subst
     12   $(eval $(call do-clang-flags-subst,$(1),$(2)))
     13 endef
     14 
     15 
     16 CLANG_CONFIG_EXTRA_CFLAGS := \
     17   -D__compiler_offsetof=__builtin_offsetof \
     18 
     19 CLANG_CONFIG_UNKNOWN_CFLAGS := \
     20   -funswitch-loops
     21 
     22 ifeq ($(TARGET_ARCH),arm)
     23   RS_TRIPLE := armv7-none-linux-gnueabi
     24   CLANG_CONFIG_EXTRA_ASFLAGS += \
     25     -target arm-linux-androideabi \
     26     -nostdlibinc \
     27     -B$(TARGET_TOOLCHAIN_ROOT)/arm-linux-androideabi/bin
     28   CLANG_CONFIG_EXTRA_CFLAGS += \
     29     $(CLANG_CONFIG_EXTRA_ASFLAGS) \
     30     -mllvm -arm-enable-ehabi
     31   CLANG_CONFIG_EXTRA_LDFLAGS += \
     32     -target arm-linux-androideabi \
     33     -B$(TARGET_TOOLCHAIN_ROOT)/arm-linux-androideabi/bin
     34   CLANG_CONFIG_UNKNOWN_CFLAGS += \
     35     -mthumb-interwork \
     36     -fgcse-after-reload \
     37     -frerun-cse-after-loop \
     38     -frename-registers \
     39     -fno-builtin-sin \
     40     -fno-strict-volatile-bitfields \
     41     -fno-align-jumps \
     42     -Wa,--noexecstack
     43 endif
     44 ifeq ($(TARGET_ARCH),mips)
     45   RS_TRIPLE := mipsel-unknown-linux
     46   CLANG_CONFIG_EXTRA_ASFLAGS += \
     47     -target mipsel-linux-androideabi \
     48     -nostdlibinc \
     49     -B$(TARGET_TOOLCHAIN_ROOT)/mipsel-linux-android/bin
     50   CLANG_CONFIG_EXTRA_CFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
     51   CLANG_CONFIG_EXTRA_LDFLAGS += \
     52     -target mipsel-linux-androideabi \
     53     -B$(TARGET_TOOLCHAIN_ROOT)/mipsel-linux-android/bin
     54   CLANG_CONFIG_UNKNOWN_CFLAGS += \
     55     -EL \
     56     -mips32 \
     57     -mips32r2 \
     58     -mhard-float \
     59     -fno-strict-volatile-bitfields \
     60     -fgcse-after-reload \
     61     -frerun-cse-after-loop \
     62     -frename-registers \
     63     -march=mips32r2 \
     64     -mtune=mips32r2 \
     65     -march=mips32 \
     66     -mtune=mips32 \
     67     -msynci \
     68     -mno-fused-madd
     69 endif
     70 ifeq ($(TARGET_ARCH),x86)
     71   RS_TRIPLE := i686-unknown-linux
     72   CLANG_CONFIG_EXTRA_ASFLAGS += \
     73     -target i686-linux-android \
     74     -nostdlibinc \
     75     -B$(TARGET_TOOLCHAIN_ROOT)/i686-linux-android/bin
     76   CLANG_CONFIG_EXTRA_CFLAGS += $(CLANG_CONFIG_EXTRA_ASFLAGS)
     77   CLANG_CONFIG_EXTRA_LDFLAGS += \
     78     -target i686-linux-android \
     79     -B$(TARGET_TOOLCHAIN_ROOT)/i686-linux-android/bin
     80   CLANG_CONFIG_UNKNOWN_CFLAGS += \
     81     -finline-limit=300 \
     82     -fno-inline-functions-called-once \
     83     -mfpmath=sse \
     84     -mbionic
     85 endif
     86 
     87 CLANG_CONFIG_EXTRA_TARGET_C_INCLUDES := external/clang/lib/include $(TARGET_OUT_HEADERS)/clang
     88 
     89 # remove unknown flags to define CLANG_FLAGS
     90 TARGET_GLOBAL_CLANG_FLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_GLOBAL_CFLAGS))
     91 HOST_GLOBAL_CLANG_FLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(HOST_GLOBAL_CFLAGS))
     92 
     93 TARGET_arm_CLANG_CFLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_arm_CFLAGS))
     94 TARGET_thumb_CLANG_CFLAGS += $(filter-out $(CLANG_CONFIG_UNKNOWN_CFLAGS),$(TARGET_thumb_CFLAGS))
     95 
     96 # llvm does not yet support -march=armv5e nor -march=armv5te, fall back to armv5 or armv5t
     97 $(call clang-flags-subst,-march=armv5te,-march=armv5t)
     98 $(call clang-flags-subst,-march=armv5e,-march=armv5)
     99 
    100 # clang does not support -Wno-psabi and -Wno-unused-but-set-variable
    101 $(call clang-flags-subst,-Wno-psabi,)
    102 $(call clang-flags-subst,-Wno-unused-but-set-variable,)
    103 
    104 # clang does not support -mcpu=cortex-a15 yet - fall back to armv7-a for now
    105 $(call clang-flags-subst,-mcpu=cortex-a15,-march=armv7-a)
    106 
    107 ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address
    108 ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
    109 ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl libasan_preload
    110 ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
    111 
    112 # This allows us to use the superset of functionality that compiler-rt
    113 # provides to Clang (for supporting features like -ftrapv).
    114 COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras
    115