MacOS encounter this issue. plz help me with this.

[panghaibo]

Undefined symbols for architecture x86_64: "fLI::FLAGS_v", referenced from: wangle::AsyncSocketHandler::write(wangle::HandlerContext<folly::IOBufQueue&, std::1::unique_ptr<folly::IOBuf, std::__1::default_delete > >*, std::1::unique_ptr<folly::IOBuf, std::1::default_delete >) in wangle_test-1a664b.o fizz::server::Aead128GCMTicketCipher<fizz::server::TicketCodec<(fizz::server::CertificateStorage)1> >::decrypt(std::1::unique_ptr<folly::IOBuf, std::1::default_delete >) const in wangle_test-1a664b.o "google::LogMessage::stream()", referenced from: wangle::ServerBootstrap<wangle::Pipeline<folly::IOBufQueue&, std::1::basic_string<char, std::1::char_traits, std::__1::allocator > > >::bind(int) in wangle_test-1a664b.o wangle::ServerBootstrap<wangle::Pipeline<folly::IOBufQueue&, std::1::basic_string<char, std::1::char_traits, std::__1::allocator > > >::waitForStop() in wangle_test-1a664b.o void wangle::detail::logWarningIfNotUnit<boost::variant<folly::IOBuf, folly::AsyncTransport, wangle::ConnInfo&, wangle::ConnEvent, std::1::tuple<folly::IOBuf, std::__1::shared_ptr, folly::SocketAddress>, std::__1::tuple<folly::IOBuf, std::1::shared_ptr, folly::SocketAddress, folly::AsyncUDPSocket::ReadCallback::OnDataAvailableParams> > >(std::__1::basic_string<char, std::1::char_traits, std::__1::allocator > const&) in wangle_test-1a664b.o wangle::AsyncServerSocketFactory::removeAcceptCB(std::__1::shared_ptr, wangle::Acceptor, folly::EventBase) in wangle_test-1a664b.o