protobuf problem

[MyraBaba]

Hi,

I compiled 2.6.1 protobuf version as in http://maqister.blogspot.com/2015/07/google-protocol-buffers-261.html

but I have below error ?

how can I make it work on the Raspi 3B+ ?

/usr/bin/ld: warning: libprotobuf.so.8, needed by /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so, not found (try using -rpath or -rpath-link)
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadString(google::protobuf::io::CodedInputStream*, std::string*)' /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::Message::GetTypeName() const'
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::kEmptyString' /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::MessageFactory::InternalRegisterGeneratedFile(char const*, void ()(std::string const&))'
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::WireFormatLite::WriteBytes(int, std::string const&, google::protobuf::io::CodedOutputStream*)' /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::MessageLite::ParseFromString(std::string const&)'
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::WireFormat::VerifyUTF8StringFallback(char const*, int, google::protobuf::internal::WireFormat::Operation)' /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::WireFormatLite::WriteString(int, std::string const&, google::protobuf::io::CodedOutputStream)'
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::DescriptorPool::FindFileByName(std::string const&) const' /home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to google::protobuf::internal::WireFormatLite::ReadBytes(google::protobuf::io::CodedInputStream*, std::string*)'
/home/pi/Downloads/Brodmann17FaceDetector/lib/armv7l/libbrodmann17.so: undefined reference to `google::protobuf::Message::InitializationErrorString() const'
collect2: error: ld returned 1 exit status
CMakeFiles/example.dir/build.make:139: recipe for target 'example' failed
make[2]: *** [example] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/example.dir/all' failed
make[1]: *** [CMakeFiles/example.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2