title: Boost Mountain Lion linking
body: <p>I'm triing to link to boost 1.50 on Mountain Lion with Xcode V 4.4
  I'm using gcc 4.7, so no Xcode stuff should be involved. 
  Every time I'm triing to link it gives me this:</p>
  
  <pre><code>/usr/local/bin/g++  -o bin/parse -Lbin `root-config --ldflags`    build/Bcf.o build/Bmf.o build/Boc.o build/EasyBMP.o build/Fei4.o build/Options.o build/RxChannel.o build/TxChannel.o -lboost_program_options -lboost_system -lboost_filesystem  -lboc `root-config --libs` build/parse.o
  Undefined symbols for architecture x86_64:
    "start", referenced from:
       -u command line option
       (maybe you meant: boost::property_tree::string_path&lt;std::basic_string&lt;char,    std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, boost::property_tree::id_translator&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt; &gt; &gt;::cstart() const, boost::progress_display::restart(unsigned long) , boost::property_tree::json_parser::json_grammar&lt;boost::property_tree::basic_ptree&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, std::less&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt; &gt; &gt; &gt;::definition&lt;boost::spirit::classic::scanner&lt;__gnu_cxx::__normal_iterator&lt;char*, std::vector&lt;char, std::allocator&lt;char&gt; &gt; &gt;, boost::spirit::classic::scanner_policies&lt;boost::spirit::classic::skip_parser_iteration_policy&lt;boost::spirit::classic::alternative&lt;boost::spirit::classic::alternative&lt;boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser&lt;boost::spirit::classic::strlit&lt;char const*&gt;, boost::spirit::classic::kleene_star&lt;boost::spirit::classic::anychar_parser&gt;, boost::spirit::classic::alternative&lt;boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser&gt;, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme&gt; &gt;, boost::spirit::classic::confix_parser&lt;boost::spirit::classic::strlit&lt;char const*&gt;, boost::spirit::classic::kleene_star&lt;boost::spirit::classic::anychar_parser&gt;, boost::spirit::classic::strlit&lt;char const*&gt;, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme&gt; &gt;, boost::spirit::classic::iteration_policy&gt;, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy&gt; &gt; &gt;::start() const )
    "boost::filesystem::detail::status(boost::filesystem::path const&amp;, boost::system::error_code*)", referenced from:
        boost::filesystem::exists(boost::filesystem::path const&amp;) in Bcf.o
    "boost::filesystem::detail::file_size(boost::filesystem::path const&amp;,boost::system::error_code*)", referenced from:
        boost::filesystem::file_size(boost::filesystem::path const&amp;) in Bcf.o
  ld: symbol(s) not found for architecture x86_64
  </code></pre>
  
  <p>Boost was build after the Update and it worked before</p>
  
  <p>I tried building it using macports or homebrew, but this breaks everything...</p>