0 
OS -> OSX El Captain Version 10.11.6

尝试使用以下命令安装 gRPC：

  1. git clone-b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
  2. cd grpc
  3. git submodule update --init
  4. make

我收到以下错误：

    [HOSTCXX] Compiling src/compiler/cpp_plugin.cc
    [HOSTLD]  Linking /<path>/grpc/bins/opt/grpc_cpp_plugin
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    Undefined symbols for architecture x86_64: 
    "google::protobuf::io::StringOutputStream::StringOutputStream(std::__1::basic_string<char, std::__1::char_traits<char>, 
    std::__1::allocator<char> >*)", referenced from:
    ProtoBufFile::CreatePrinter(std::__1::basic_string<char, 
    std::__1::char_traits<char>, std::__1::allocator<char> >*) const in cpp_plugin.o

    "google::protobuf::io::Printer::Print(std::__1::map<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> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > > const&, char const*)", referenced from:
  ProtoBufPrinter::Print(std::__1::map<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> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > > const&, char const*) in cpp_plugin.o

     "google::protobuf::FileDescriptor::GetSourceLocation(std::__1::vector<int, std::__1::allocator<int> > const&, google::protobuf::SourceLocation*) const", referenced from:
  void grpc_generator::GetComment<google::protobuf::FileDescriptor>(google::protobuf::FileDescriptor const*, grpc_generator::CommentType, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > >*) in cpp_plugin.o
    "google::protobuf::compiler::CodeGenerator::GenerateAll(std::__1::vector<google::protobuf::FileDescriptor const*, std::__1::allocator<google::protobuf::FileDescriptor const*> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, google::protobuf::compiler::GeneratorContext*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*) const", referenced from:
  vtable for CppGrpcGenerator in cpp_plugin.o
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    make: *** [/<path>/grpc/bins/opt/grpc_cpp_plugin] Error 1

这就是我所拥有的

/<path>/grpc/libs/opt/ directory :
 - libares.a    
 - libgpr.a
 - libgrpc_cronet.a     
 - libgrpc_unsecure.a
 - libboringssl.a
 - libgrpc.a            
 - libgrpc_plugin_support.a 
 - pkgconfig

[编辑]

卸载 protobuf 并再次运行 make 后，我收到以下警告：

    [LD]      Linking /<path>/grpc/libs/opt/libgpr.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc_cronet.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc_unsecure.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc++.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc++_cronet.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc++_error_details.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc++_reflection.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'
    [LD]      Linking /<path>/grpc/libs/opt/libgrpc++_unsecure.dylib
    ld: warning: directory not found for option '-L/<path>/grpc/libs/opt/c-ares'

如果我通过执行 'sudo make install' 继续安装，则不会安装 protobuf 并且 grpc_cpp_plugin 不起作用（给出以下错误）。

    grpc_cpp_plugin: program not found or is not executable
    --grpc_out: protoc-gen-grpc: Plugin failed with status code 1.

[编辑]

对于 c-ares 问题，我使用 homebrew 安装了它brew install c-ares。然后安装 grpcgrpc-1.3.0.tar.gz和 protobuflibprotoc 3.2.0没有错误。但是当我make在 helloworld 示例中运行时，我收到以下错误：

protoc -I ../../protos --cpp_out=. ../../protos/helloworld.proto
g++ -std=c++11 -I/usr/local/include -pthread  -c -o helloworld.pb.o helloworld.pb.cc
protoc -I ../../protos --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_cpp_plugin` ../../protos/helloworld.proto
g++ -std=c++11 -I/usr/local/include -pthread  -c -o helloworld.grpc.pb.o helloworld.grpc.pb.cc
g++ -std=c++11 -I/usr/local/include -pthread  -c -o greeter_client.o greeter_client.cc
g++ helloworld.pb.o helloworld.grpc.pb.o greeter_client.o -L/usr/local/lib `pkg-config --libs grpc++ grpc` -lgrpc++_reflection -lprotobuf -lpthread -ldl -o greeter_client
Undefined symbols for architecture x86_64:
  "grpc::CreateChannel(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::shared_ptr<grpc::ChannelCredentials> const&)", referenced from:
      _main in greeter_client.o
  "google::protobuf::MessageFactory::InternalRegisterGeneratedFile(char const*, void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&))", referenced from:
      helloworld::protobuf_helloworld_2eproto::AddDescriptorsImpl()       in helloworld.pb.o
  "google::protobuf::io::CodedOutputStream::WriteStringWithSizeToArray(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned char*)", referenced from:
      google::protobuf::internal::WireFormatLite::WriteStringToArray(int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned char*) in helloworld.pb.o
  "google::protobuf::internal::ArenaStringPtr::AssignWithDefault(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const*, google::protobuf::internal::ArenaStringPtr)", referenced from:
      helloworld::HelloRequest::HelloRequest(helloworld::HelloRequest const&) in helloworld.pb.o
      helloworld::HelloRequest::HelloRequest(helloworld::HelloRequest const&) in helloworld.pb.o
      helloworld::HelloRequest::MergeFrom(helloworld::HelloRequest const&) in helloworld.pb.o
      helloworld::HelloReply::HelloReply(helloworld::HelloReply const&) in helloworld.pb.o
      helloworld::HelloReply::HelloReply(helloworld::HelloReply const&) in helloworld.pb.o
      helloworld::HelloReply::MergeFrom(helloworld::HelloReply const&) in helloworld.pb.o
  "google::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, google::protobuf::io::CodedOutputStream*)", referenced from:
      helloworld::HelloRequest::SerializeWithCachedSizes(google::protobuf::io::CodedOutputStream*) const  in helloworld.pb.o
      helloworld::HelloReply::SerializeWithCachedSizes(google::protobuf::io::CodedOutputStream*) const  in helloworld.pb.o
  "google::protobuf::internal::WireFormatLite::ReadBytes(google::protobuf::io::CodedInputStream*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)", referenced from:
      google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) in helloworld.pb.o
  "google::protobuf::internal::AssignDescriptors(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, google::protobuf::internal::MigrationSchema const*, google::protobuf::Message const* const*, unsigned int const*, google::protobuf::MessageFactory*, google::protobuf::Metadata*, google::protobuf::EnumDescriptor const**, google::protobuf::ServiceDescriptor const**)", referenced from:
      helloworld::protobuf_helloworld_2eproto::(anonymous namespace)::protobuf_AssignDescriptors() in helloworld.pb.o
  "google::protobuf::internal::fixed_address_empty_string[abi:cxx11]", referenced from:
      google::protobuf::internal::GetEmptyStringAlreadyInited[abi:cxx11]() in helloworld.pb.o
      google::protobuf::internal::GetEmptyStringAlreadyInited[abi:cxx11]() in greeter_client.o
  "google::protobuf::Message::GetTypeName[abi:cxx11]() const", referenced from:
      vtable for helloworld::HelloReply in helloworld.pb.o
      vtable for helloworld::HelloRequest in helloworld.pb.o
  "google::protobuf::Message::InitializationErrorString[abi:cxx11]() const", referenced from:
      vtable for helloworld::HelloReply in helloworld.pb.o
      vtable for helloworld::HelloRequest in helloworld.pb.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make: *** [greeter_client] Error 1

谢谢

4

1 回答 1

0

这可能与安装的 ProtoBuf 的错误或损坏版本有关，因为如果安装了 protobuf 并且版本超过 3.0，则 gRPC 构建系统使用系统的 protobuf，从 subrepo 插入 thrird-party-protobuf。尝试删除或修复系统中的 protobuf。

更新：对于新问题，尝试为每个 grpc 和 protobuf 库运行“readelf -s lib???.so”，并尝试在库中查找此符号。如果在某些库中指定了“UND”，那么它是错误的库。您应该做的第二件事，为每个 grpc 和 protobuf 库运行“file lib???.so”以检查二进制类型：x86_64 与否。

于 2017-05-15T10:13:03.293 回答