Как связать libjsoncpp с AOSP?

Question

Я добавил код в Android Healthd, в том числе файл client.cpp, который использует.

Во время сборки Android я вижу следующие ошибки:

      FAILED: out/soong/.intermediates/system/core/healthd/healthd/android_arm64_armv8-a_cortex-a53_core/unstripped/healthd
prebuilts/clang/host/linux-x86/clang-r353983c/bin/clang++ out/soong/.intermediates/bionic/libc/crtbegin_dynamic/android_arm64_armv8-a_cortex-a53_core/crtbegin_dynamic.o @out/soong/.intermediates/system/core/healthd/healthd/android_arm64_armv8-a_cortex-a53_core/unstripped/healthd.rsp out/soong/.intermediates/hardware/interfaces/health/2.0/utils/libhealthservice/libhealthservice/android_arm64_armv8-a_cortex-a53_core_static/libhealthservice.a out/soong/.intermediates/hardware/interfaces/health/2.0/default/android.hardware.health@2.0-impl/android_arm64_armv8-a_cortex-a53_core_static/android.hardware.health@2.0-impl.a out/soong/.intermediates/hardware/interfaces/health/1.0/default/android.hardware.health@1.0-convert/android_arm64_armv8-a_cortex-a53_core_static/android.hardware.health@1.0-convert.a out/soong/.intermediates/hardware/interfaces/health/2.0/utils/libhealthstoragedefault/libhealthstoragedefault/android_arm64_armv8-a_cortex-a53_core_static/libhealthstoragedefault.a out/soong/.intermediates/system/core/healthd/libbatterymonitor/android_arm64_armv8-a_cortex-a53_core_static/libbatterymonitor.a -Wl,--start-group prebuilts/clang/host/linux-x86/clang-r353983c/lib64/clang/9.0.3/lib/linux/libclang_rt.builtins-aarch64-android.a prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/aarch64-linux-android/lib64/libatomic.a out/soong/.intermediates/build/soong/libgcc_stripped/android_arm64_armv8-a_cortex-a53_core_static/libgcc_stripped.a -Wl,--end-group out/soong/.intermediates/system/core/base/libbase/android_arm64_armv8-a_cortex-a53_core_shared/libbase.so out/soong/.intermediates/system/core/libcutils/libcutils/android_arm64_armv8-a_cortex-a53_core_shared/libcutils.so out/soong/.intermediates/system/libhidl/libhidlbase/android_arm64_armv8-a_cortex-a53_core_shared/libhidlbase.so out/soong/.intermediates/system/libhidl/libhidltransport/android_arm64_armv8-a_cortex-a53_core_shared/libhidltransport.so out/soong/.intermediates/system/libhwbinder/libhwbinder/android_arm64_armv8-a_cortex-a53_core_shared/libhwbinder.so out/soong/.intermediates/system/core/liblog/liblog/android_arm64_armv8-a_cortex-a53_core_shared/liblog.so out/soong/.intermediates/system/core/libutils/libutils/android_arm64_armv8-a_cortex-a53_core_shared/libutils.so out/soong/.intermediates/hardware/interfaces/health/2.0/android.hardware.health@2.0/android_arm64_armv8-a_cortex-a53_core_shared/[e-mail] out/soong/.intermediates/hardware/interfaces/health/1.0/android.hardware.health@1.0/android_arm64_armv8-a_cortex-a53_core_shared/[e-mail] out/soong/.intermediates/external/libcxx/libc++/android_arm64_armv8-a_cortex-a53_core_shared/libc++.so out/soong/.intermediates/bionic/libc/libc/android_arm64_armv8-a_cortex-a53_core_shared_10000/libc.so out/soong/.intermediates/bionic/libm/libm/android_arm64_armv8-a_cortex-a53_core_shared_10000/libm.so out/soong/.intermediates/bionic/libdl/libdl/android_arm64_armv8-a_cortex-a53_core_shared_10000/libdl.so out/soong/.intermediates/bionic/libc/crtend_android/android_arm64_armv8-a_cortex-a53_core/obj/bionic/libc/arch-common/bionic/crtend.o -o out/soong/.intermediates/system/core/healthd/healthd/android_arm64_armv8-a_cortex-a53_core/unstripped/healthd -target aarch64-linux-android -Bprebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/aarch64-linux-android/bin -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -Wl,--build-id=md5 -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined-version -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libgcc_stripped.a -fuse-ld=lld -Wl,--pack-dyn-relocs=android+relr -Wl,--use-android-relr-tags -Wl,--no-undefined -Wl,--hash-style=gnu -Wl,--icf=safe -Wl,-z,max-page-size=4096 -Wl,--fix-cortex-a53-843419  -pie -nostdlib -Bdynamic -Wl,--gc-sections -Wl,-z,nocopyreloc prebuilts/clang/host/linux-x86/clang-r353983c/lib64/clang/9.0.3/lib/linux/libclang_rt.ubsan_minimal-aarch64-android.a -Wl,--exclude-libs,libclang_rt.ubsan_minimal-aarch64-android.a -Wl,-execute-only -Wl,-dynamic-linker,/system/bin/linker64
ld.lld: error: undefined symbol: Json::Value::Value(Json::ValueType)
>>> referenced by client.cpp:19 (hardware/interfaces/health/2.0/default/client.cpp:19)
>>>               client.o:(Client::parse_line(char*)) in archive out/soong/.intermediates/hardware/interfaces/health/2.0/default/android.hardware.health@2.0-impl/android_arm64_armv8-a_cortex-a53_core_static/android.hardware.health@2.0-impl.a

ld.lld: error: undefined symbol: Json::Reader::Reader()
>>> referenced by client.cpp:20 (hardware/interfaces/health/2.0/default/client.cpp:20)
>>>               client.o:(Client::parse_line(char*)) in archive out/soong/.intermediates/hardware/interfaces/health/2.0/default/android.hardware.health@2.0-impl/android_arm64_armv8-a_cortex-a53_core_static/android.hardware.health@2.0-impl.a
...

Я добавил в раздел hardware/interfaces/health/2.0/defaultAndroid.bp:

      cc_defaults {
    name: "android.hardware.health@2.0-impl_defaults",

    recovery_available: true,
    cflags: [
        "-Wall",
        "-Werror",
        "-std=gnu++17",
    ],

    shared_libs: [
        "libbase",
        "libhidlbase",
        "libhidltransport",
        "libhwbinder",
        "liblog",
        "libutils",
        "libcutils",
        "android.hardware.health@2.0",
        "libjsoncpp",
    ],

    static_libs: [
        "libbatterymonitor",
        "android.hardware.health@1.0-convert",
    ],
}

// Helper library for implementing health HAL. It is recommended that a health
// service or passthrough HAL link to this library.
cc_library_static {
    name: "android.hardware.health@2.0-impl",
    defaults: ["android.hardware.health@2.0-impl_defaults"],

    vendor_available: true,
    srcs: [
        "Health.cpp",
        "healthd_common.cpp",
        "powerd.cpp",
        "client.cpp",
    ],

    export_include_dirs: ["include"],
}

// Default passthrough implementation for recovery. Vendors can implement
// android.hardware.health@2.0-impl-recovery-<device> to customize the behavior
// of the HAL in recovery.
// The implementation does NOT start the uevent loop for polling.
cc_library_shared {
    name: "android.hardware.health@2.0-impl-default",
    defaults: ["android.hardware.health@2.0-impl_defaults"],

    recovery_available: true,
    relative_install_path: "hw",

    static_libs: [
        "android.hardware.health@2.0-impl",
        "libhealthstoragedefault",
    ],

    srcs: [
        "HealthImplDefault.cpp",
    ],
}

Я уже успешно предоставил заголовки для libjsoncpp. Я не вижу эту ошибку, пока не добавлю код, который действительно использует.

Библиотека существует как часть ранее созданного образа Android:

      smarc_mx8mq:/ # find / -name "libjsoncpp*" 2>/dev/null
/system/lib64/libjsoncpp.so
/system/lib64/vndk-sp-29/libjsoncpp.so
/system/lib/vndk-sp-29/libjsoncpp.so

Как мне сказать Android, что я хочу, чтобы меня связали?

Не следует даже пытаться разрешить эти символы до тех пор, пока healthd выполняется, поскольку они предоставляются разделяемой библиотекой.

---

Обновлять:

Я заметил, что другие библиотеки в shared_libs все присутствуют в командной строке, так как .sos, но libjsoncpp пропал, отсутствует.

Новый вопрос: почему libcppjson отсутствует в команде связывания?