Android Platfrom libbase => libc++

old platform/system/core/base/Android.mk

https://android.googlesource.com/platform/system/core/+/da21ac0/base/Android.mk

# Device
# ------------------------------------------------------------------------------
include $(CLEAR_VARS)
LOCAL_MODULE := libbase
LOCAL_CLANG := true
LOCAL_SRC_FILES := $(libbase_src_files)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_CPPFLAGS := $(libbase_cppflags)
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
LOCAL_STATIC_LIBRARIES := libcutils
LOCAL_MULTILIB := both
include $(BUILD_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libbase
LOCAL_CLANG := true
LOCAL_WHOLE_STATIC_LIBRARIES := libbase
LOCAL_SHARED_LIBRARIES := liblog
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
LOCAL_SHARED_LIBRARIES := libcutils
LOCAL_MULTILIB := both
include $(BUILD_SHARED_LIBRARY)

new platform/system/core/base/Android.bp

https://android.googlesource.com/platform/system/core/+/refs/heads/master/base/Android.bp

cc_library_static {
    name: "libbase_ndk",
    defaults: ["libbase_defaults"],
    sdk_version: "current",
    stl: "c++_static",
    export_include_dirs: ["include"],
    static_libs: ["fmtlib_ndk"],
    whole_static_libs: ["fmtlib_ndk"],
    export_static_lib_headers: ["fmtlib_ndk"],
}

Android 10 platform/system/core/base/Android.bp

https://android.googlesource.com/platform/system/core/+/refs/heads/android10-mainline-release/base/Android.bp

cc_library_static {
    name: "libbase_ndk",
    defaults: ["libbase_defaults"],
    sdk_version: "current",
    stl: "c++_static",
    export_include_dirs: ["include"],
}

Android 10 platform/external/libcxx/Android.bp

https://android.googlesource.com/platform/external/libcxx/+/refs/heads/android10-mainline-release/Android.bp

// host + device dynamic lib
cc_library_shared {
    name: "libc++",
    host_supported: true,
    vendor_available: true,
    vndk: {
        enabled: true,
        support_system_process: true,
    },
    recovery_available: true,
    whole_static_libs: ["libc++_static"],
    stl: "none",
    target: {
        android_arm: {
            static_libs: ["libunwind_llvm"],
            ldflags: ["-Wl,--exclude-libs,libunwind_llvm.a"],
        },
        darwin: {
            unexported_symbols_list: "lib/libc++unexp.exp",
            force_symbols_not_weak_list: "lib/notweak.exp",
            force_symbols_weak_list: "lib/weak.exp",
            ldflags: [
                "-nodefaultlibs",
                "-Wl,-undefined,dynamic_lookup",
            ],
        },
        linux_glibc: {
            ldflags: ["-nodefaultlibs"],
        },
        linux_bionic: {
            enabled: true,
        },
    },
}