symbole (s) introuvable (s) pour l'architecture x86_64 dans Xcode 10 (ERREUR)

Je suis confronté au problème dans mon projet ios. symboles introuvables pour l'architecture x86_64 dans Xcode clang: erreur: la commande de l'éditeur de liens a échoué avec le code de sortie 1 (utilisez -v pour voir l'invocation). J'ai bombardé mon xcode et mon dossier de projet plusieurs fois en essayant de contourner cela. Je suis coincé. Des idées? Le journal est ci-dessous. J'essaie d'exécuter un simulateur basé sur Xcode 10.

  Undefined symbols for architecture x86_64:
    "google::LogMessage::LogMessage(char const*, int, int)", referenced from:
        facebook::react::CxxNativeModule::invoke(unsigned int, folly::dynamic&&, int)::$_1::operator()() const in CxxNativeModule.o
        facebook::react::JSException::buildMessage(OpaqueJSContext const*, OpaqueJSValue const*, OpaqueJSString*, char const*) in JSCHelpers.o
        facebook::react::NativeToJsBridge::callFunction(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&, folly::dynamic&&)::$_1::operator()(facebook::react::JSExecutor*) const in NativeToJsBridge.o
        facebook::react::NativeToJsBridge::invokeCallback(double, folly::dynamic&&)::$_2::operator()(facebook::react::JSExecutor*) const in NativeToJsBridge.o
    "double_conversion::DoubleToStringConverter::ToShortestIeeeNumber(double, double_conversion::StringBuilder*, double_conversion::DoubleToStringConverter::DtoaMode) const", referenced from:
        double_conversion::DoubleToStringConverter::ToShortest(double, double_conversion::StringBuilder*) const in CxxNativeModule.o
    "double_conversion::DoubleToStringConverter::ToFixed(double, int, double_conversion::StringBuilder*) const", referenced from:
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in CxxNativeModule.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in JSCExecutor.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in MethodCall.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in Value.o
    "double_conversion::DoubleToStringConverter::ToPrecision(double, int, double_conversion::StringBuilder*) const", referenced from:
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in CxxNativeModule.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in JSCExecutor.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in MethodCall.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in Value.o
    "google::LogMessageFatal::LogMessageFatal(char const*, int)", referenced from:
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in CxxNativeModule.o
        facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_delete<facebook::react::InstanceCallback> >, std::__1::shared_ptr<facebook::react::JSExecutorFactory>, std::__1::shared_ptr<facebook::react::MessageQueueThread>, std::__1::shared_ptr<facebook::react::ModuleRegistry>) in Instance.o
        facebook::react::JSBigFileString::fromPath(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)::$_0::operator()() const in JSBigString.o
        facebook::react::JSBigFileString::c_str() const in JSBigString.o
        facebook::react::JSCExecutor::~JSCExecutor() in JSCExecutor.o
        facebook::react::JSCExecutor::callNativeModules(facebook::react::Value&&) in JSCExecutor.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in JSCExecutor.o
        ...
    "google::LogMessage::stream()", referenced from:
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in CxxNativeModule.o
        facebook::react::CxxNativeModule::invoke(unsigned int, folly::dynamic&&, int)::$_1::operator()() const in CxxNativeModule.o
        facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_delete<facebook::react::InstanceCallback> >, std::__1::shared_ptr<facebook::react::JSExecutorFactory>, std::__1::shared_ptr<facebook::react::MessageQueueThread>, std::__1::shared_ptr<facebook::react::ModuleRegistry>) in Instance.o
        facebook::react::JSBigFileString::fromPath(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)::$_0::operator()() const in JSBigString.o
        facebook::react::JSBigFileString::c_str() const in JSBigString.o
        facebook::react::JSCExecutor::~JSCExecutor() in JSCExecutor.o
        facebook::react::JSCExecutor::callNativeModules(facebook::react::Value&&) in JSCExecutor.o
        ...
    "google::LogMessage::~LogMessage()", referenced from:
        facebook::react::CxxNativeModule::invoke(unsigned int, folly::dynamic&&, int)::$_1::operator()() const in CxxNativeModule.o
        facebook::react::JSException::buildMessage(OpaqueJSContext const*, OpaqueJSValue const*, OpaqueJSString*, char const*) in JSCHelpers.o
        facebook::react::NativeToJsBridge::callFunction(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&, folly::dynamic&&)::$_1::operator()(facebook::react::JSExecutor*) const in NativeToJsBridge.o
        facebook::react::NativeToJsBridge::invokeCallback(double, folly::dynamic&&)::$_2::operator()(facebook::react::JSExecutor*) const in NativeToJsBridge.o
    "google::LogMessageFatal::~LogMessageFatal()", referenced from:
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in CxxNativeModule.o
        facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_delete<facebook::react::InstanceCallback> >, std::__1::shared_ptr<facebook::react::JSExecutorFactory>, std::__1::shared_ptr<facebook::react::MessageQueueThread>, std::__1::shared_ptr<facebook::react::ModuleRegistry>) in Instance.o
        facebook::react::JSBigFileString::fromPath(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)::$_0::operator()() const in JSBigString.o
        facebook::react::JSBigFileString::c_str() const in JSBigString.o
        facebook::react::JSCExecutor::~JSCExecutor() in JSCExecutor.o
        facebook::react::JSCExecutor::callNativeModules(facebook::react::Value&&) in JSCExecutor.o
        std::__1::enable_if<(std::is_floating_point<double>::value) && (IsSomeString<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::value), void>::type folly::toAppend<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, double>(double, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, double_conversion::DoubleToStringConverter::DtoaMode, unsigned int) in JSCExecutor.o
        ...
  ld: symbol(s) not found for architecture x86_64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)