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      1 # This file is dual licensed under the MIT and the University of Illinois Open
      2 # Source Licenses. See LICENSE.TXT for details.
      3 
      4 LOCAL_PATH := $(call my-dir)
      5 
      6 # Normally, we distribute the NDK with prebuilt binaries of libc++
      7 # in $LOCAL_PATH/libs/<abi>/. However,
      8 #
      9 
     10 LIBCXX_FORCE_REBUILD := $(strip $(LIBCXX_FORCE_REBUILD))
     11 ifndef LIBCXX_FORCE_REBUILD
     12   ifeq (,$(strip $(wildcard $(LOCAL_PATH)/libs/$(TARGET_ARCH_ABI)/libc++_static$(TARGET_LIB_EXTENSION))))
     13     $(call __ndk_info,WARNING: Rebuilding libc++ libraries from sources!)
     14     $(call __ndk_info,You might want to use $$NDK/build/tools/build-cxx-stl.sh --stl=libc++)
     15     $(call __ndk_info,in order to build prebuilt versions to speed up your builds!)
     16     LIBCXX_FORCE_REBUILD := true
     17   endif
     18 endif
     19 
     20 libcxx_includes := $(LOCAL_PATH)/include
     21 libcxx_export_includes := $(libcxx_includes)
     22 libcxx_sources := \
     23     algorithm.cpp \
     24     any.cpp \
     25     bind.cpp \
     26     chrono.cpp \
     27     condition_variable.cpp \
     28     debug.cpp \
     29     exception.cpp \
     30     functional.cpp \
     31     future.cpp \
     32     hash.cpp \
     33     ios.cpp \
     34     iostream.cpp \
     35     locale.cpp \
     36     memory.cpp \
     37     mutex.cpp \
     38     new.cpp \
     39     optional.cpp \
     40     random.cpp \
     41     regex.cpp \
     42     shared_mutex.cpp \
     43     stdexcept.cpp \
     44     string.cpp \
     45     strstream.cpp \
     46     system_error.cpp \
     47     thread.cpp \
     48     typeinfo.cpp \
     49     utility.cpp \
     50     valarray.cpp \
     51     variant.cpp \
     52     vector.cpp \
     53 
     54 libcxx_sources := $(libcxx_sources:%=src/%)
     55 
     56 libcxx_export_cxxflags :=
     57 
     58 ifeq (,$(filter clang%,$(NDK_TOOLCHAIN_VERSION)))
     59 # Add -fno-strict-aliasing because __list_imp::_end_ breaks TBAA rules by declaring
     60 # simply as __list_node_base then casted to __list_node derived from that.  See
     61 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61571 for details
     62 libcxx_export_cxxflags += -fno-strict-aliasing
     63 endif
     64 
     65 libcxx_cxxflags := \
     66     -std=c++1z \
     67     -DLIBCXX_BUILDING_LIBCXXABI \
     68     -D_LIBCPP_BUILDING_LIBRARY \
     69     -D_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS \
     70     -D__STDC_FORMAT_MACROS \
     71     $(libcxx_export_cxxflags) \
     72 
     73 libcxx_ldflags :=
     74 libcxx_export_ldflags :=
     75 # Need to make sure the unwinder is always linked with hidden visibility.
     76 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
     77     libcxx_ldflags += -Wl,--exclude-libs,libunwind.a
     78     libcxx_export_ldflags += -Wl,--exclude-libs,libunwind.a
     79 endif
     80 
     81 ifneq ($(LIBCXX_FORCE_REBUILD),true)
     82 
     83 $(call ndk_log,Using prebuilt libc++ libraries)
     84 
     85 libcxxabi_c_includes := $(LOCAL_PATH)/../llvm-libc++abi/include
     86 
     87 include $(CLEAR_VARS)
     88 LOCAL_MODULE := c++_static
     89 LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/lib$(LOCAL_MODULE)$(TARGET_LIB_EXTENSION)
     90 LOCAL_EXPORT_C_INCLUDES := $(libcxx_export_includes)
     91 LOCAL_EXPORT_CPPFLAGS := $(libcxx_export_cxxflags)
     92 LOCAL_EXPORT_LDFLAGS := $(libcxx_export_ldflags)
     93 
     94 # We use the LLVM unwinder for all the 32-bit ARM targets.
     95 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
     96     LOCAL_EXPORT_STATIC_LIBRARIES += libunwind
     97 endif
     98 include $(PREBUILT_STATIC_LIBRARY)
     99 
    100 include $(CLEAR_VARS)
    101 LOCAL_MODULE := c++_shared
    102 LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/lib$(LOCAL_MODULE)$(TARGET_SONAME_EXTENSION)
    103 LOCAL_EXPORT_C_INCLUDES := \
    104     $(libcxx_export_includes) \
    105     $(libcxxabi_c_includes) \
    106 
    107 # This doesn't affect the prebuilt itself since this is a prebuilt library, but
    108 # the build system needs to know about the dependency so we can sort the
    109 # exported includes properly.
    110 LOCAL_STATIC_LIBRARIES := libandroid_support
    111 LOCAL_EXPORT_CPPFLAGS := $(libcxx_export_cxxflags)
    112 LOCAL_EXPORT_LDFLAGS := $(libcxx_export_ldflags)
    113 
    114 # We use the LLVM unwinder for all the 32-bit ARM targets.
    115 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
    116     LOCAL_EXPORT_STATIC_LIBRARIES += libunwind
    117 endif
    118 include $(PREBUILT_SHARED_LIBRARY)
    119 
    120 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
    121 # We define this module here rather than in a separate cxx-stl/libunwind because
    122 # we don't actually want to make the API available (yet).
    123 include $(CLEAR_VARS)
    124 LOCAL_MODULE := libunwind
    125 LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/$(LOCAL_MODULE)$(TARGET_LIB_EXTENSION)
    126 include $(PREBUILT_STATIC_LIBRARY)
    127 endif
    128 
    129 $(call import-module, cxx-stl/llvm-libc++abi)
    130 
    131 else
    132 # LIBCXX_FORCE_REBUILD == true
    133 
    134 $(call ndk_log,Rebuilding libc++ libraries from sources)
    135 
    136 include $(CLEAR_VARS)
    137 LOCAL_MODULE := c++_static
    138 LOCAL_SRC_FILES := $(libcxx_sources)
    139 LOCAL_C_INCLUDES := $(libcxx_includes)
    140 LOCAL_CPPFLAGS := $(libcxx_cxxflags)
    141 LOCAL_CPP_FEATURES := rtti exceptions
    142 LOCAL_EXPORT_C_INCLUDES := $(libcxx_export_includes)
    143 LOCAL_EXPORT_CPPFLAGS := $(libcxx_export_cxxflags)
    144 LOCAL_EXPORT_LDFLAGS := $(libcxx_export_ldflags)
    145 LOCAL_STATIC_LIBRARIES := libc++abi android_support
    146 
    147 # We use the LLVM unwinder for all the 32-bit ARM targets.
    148 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
    149     LOCAL_STATIC_LIBRARIES += libunwind
    150     LOCAL_EXPORT_STATIC_LIBRARIES += libunwind
    151 endif
    152 
    153 include $(BUILD_STATIC_LIBRARY)
    154 
    155 include $(CLEAR_VARS)
    156 LOCAL_MODULE := c++_shared
    157 LOCAL_WHOLE_STATIC_LIBRARIES := c++_static libc++abi
    158 LOCAL_EXPORT_C_INCLUDES := $(libcxx_export_includes)
    159 LOCAL_EXPORT_CPPFLAGS := $(libcxx_export_cxxflags)
    160 LOCAL_EXPORT_LDFLAGS := $(libcxx_export_ldflags)
    161 LOCAL_STATIC_LIBRARIES := android_support
    162 LOCAL_LDFLAGS := $(libcxx_ldflags)
    163 # Use --as-needed to strip the DT_NEEDED on libstdc++.so (bionic's) that the
    164 # driver always links for C++ but we don't use.
    165 # See https://github.com/android-ndk/ndk/issues/105
    166 LOCAL_LDFLAGS += -Wl,--as-needed
    167 
    168 # We use the LLVM unwinder for all the 32-bit ARM targets.
    169 ifneq (,$(filter armeabi%,$(TARGET_ARCH_ABI)))
    170     LOCAL_STATIC_LIBRARIES += libunwind
    171     LOCAL_EXPORT_STATIC_LIBRARIES += libunwind
    172 endif
    173 
    174 # But only need -latomic for armeabi.
    175 ifeq ($(TARGET_ARCH_ABI),armeabi)
    176     LOCAL_LDLIBS += -latomic
    177 endif
    178 include $(BUILD_SHARED_LIBRARY)
    179 
    180 $(call import-add-path, $(LOCAL_PATH)/../..)
    181 $(call import-module, external/libcxxabi)
    182 
    183 endif # LIBCXX_FORCE_REBUILD == true
    184 
    185 $(call import-module, android/support)
    186