Caffe: make all error in ubuntu 16.04

[fancyerii]

I have successfully installed caffe in ubuntu 16.04 with cuda 8.0 about 4 month ago. But I use latest master code to build, it failed.
I follow all the instructions in https://github.com/BVLC/caffe/wiki/Ubuntu-16.04-or-15.10-Installation-Guide
gcc version 4.9.3

$make all
CXX/LD -o .build_release/tools/upgrade_solver_proto_text.bin
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::Message::InitializationErrorString() const' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::WireFormatLite::WriteStringMaybeAliased(int, std::string const&, google::protobuf::io::CodedOutputStream)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::io::CodedOutputStream::WriteStringWithSizeToArray(std::string const&, unsigned char*)' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream, std::string)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::Message::GetTypeName() const' .build_release/lib/libcaffe.so: undefined reference togoogle::base::CheckOpMessageBuilder::NewString()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::Message::DebugString() const' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::empty_string_'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::MessageLite::ParseFromString(std::string const&)' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::NameOfEnum(google::protobuf::EnumDescriptor const, int)'
.build_release/lib/libcaffe.so: undefined reference to cv::imread(std::string const&, int)' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::DescriptorPool::FindFileByName(std::string const&) const'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadBytes(google::protobuf::io::CodedInputStream*, std::string*)' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::StringTypeHandlerBase::Delete(std::string)'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::MessageFactory::InternalRegisterGeneratedFile(char const*, void (*)(std::string const&))' .build_release/lib/libcaffe.so: undefined reference toleveldb::DB::Open(leveldb::Options const&, std::string const&, leveldb::DB)'
.build_release/lib/libcaffe.so: undefined reference to cv::imencode(std::string const&, cv::_InputArray const&, std::vector<unsigned char, std::allocator<unsigned char> >&, std::vector<int, std::allocator<int> > const&)' .build_release/lib/libcaffe.so: undefined reference togoogle::protobuf::internal::StringTypeHandlerBase::New()'
.build_release/lib/libcaffe.so: undefined reference to google::protobuf::internal::WireFormatLite::WriteBytesMaybeAliased(int, std::string const&, google::protobuf::io::CodedOutputStream*)' .build_release/lib/libcaffe.so: undefined reference toleveldb::Status::ToString() const'
.build_release/lib/libcaffe.so: undefined reference to `google::protobuf::internal::WireFormatLite::WriteString(int, std::string const&, google::protobuf::io::CodedOutputStream)'
collect2: error: ld returned 1 exit status
Makefile:620: recipe for target '.build_release/tools/upgrade_solver_proto_text.bin' failed
make: * [.build_release/tools/upgrade_solver_proto_text.bin] Error 1

[fancyerii]

solved by using gcc 5. in https://github.com/intel/caffe/wiki/Ubuntu-16.04-or-15.10-Installation-Guide, it use gcc 4.9 because cuda 7.5 don't support gcc 5. But I am using cuda 8.0.

[jinfagang]

Hi, ubuntu16.04 was gcc5.4 by default, how did u have this problem, I occured this problem too, becourse I build protobuf 3.1 from source code using gcc5.4 so I got completely wrong message says protobuf errors. I also tried make protobuf 2.5, but caffe make says version too old, It's wired. If anyone also have occured this problem please give me some tips.

[akira-l]

anyone know how to solve the problem? I have gcc 6.3 on ubuntu 16.04. It seems that caffe cannot find the file contained google protobuf. But why? I reinstall the protobuf again and again, while, I met this bug again and again.

[YerongLi]

This definltely has something to with gcc verison, for instance, we have to build local protobuf and caffe with a same gcc.
I tried to build protobuf with g++4.7 then caffe with g++5.4, and then caffe cannot find protobuf as a result.
And I tried to build protobuf with g++4.7 then caffe with g++4.7, and then caffe can at leat find protobuf...

[goswamig]

I am trying to build on Caffe
I am using the following version
"gcc": "4.8.5",
"libgcc": "5.2.0",
"lmdb": "0.9.21",
"leveldb": "1.20"

../lib/libcaffe.so.1.0.0: undefined reference to leveldb::DB::Open(leveldb::Options const&, std::string const&, leveldb::DB**)' ../lib/libcaffe.so.1.0.0: undefined reference toleveldb::Status::ToString() const'

Can some one help me to fix this ?