Undefined symbols for architecture x86_64

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Download the protobuf src from google code.
2.Download the protobuf-matlab src 
3.Do the src copy as stated in README.txt of protobuf-matlab
4. ./configure
5. make

We will get:

Making check in src
/bin/sh ../libtool --tag=CXX   --mode=link g++ -D_THREAD_SAFE  -Wall 
-Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -O2 -g -DNDEBUG 
-D_THREAD_SAFE   -o protoc main.o  libprotobuf.la libprotoc.la -lz 
libtool: link: g++ -D_THREAD_SAFE -Wall -Wwrite-strings -Woverloaded-virtual 
-Wno-sign-compare -O2 -g -DNDEBUG -D_THREAD_SAFE -o .libs/protoc main.o 
-Wl,-bind_at_load  ./.libs/libprotobuf.dylib ./.libs/libprotoc.dylib 
/Users/mezcal/protobuf/protobuf-2.5.0/src/.libs/libprotobuf.dylib -lz
Undefined symbols for architecture x86_64:
  "farsounder::protobuf::compiler::matlab::MatlabGenerator::MatlabGenerator()", referenced from:
      _main in main.o
  "farsounder::protobuf::compiler::matlab::MatlabGenerator::~MatlabGenerator()", referenced from:
      _main in main.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status


What is the expected output? What do you see instead?
Successfully compiled and make.

What version of the product are you using? On what operating system?
My OS is mac os 10.7 64bit.

Please provide any additional information below.

Original issue reported on code.google.com by cxw.appl...@gmail.com on 19 Oct 2013 at 4:11