title: "gem install therubyracer -v '0.10.2'" on osx mavericks not installing
body: <p>Trying to install therubyracer on mavericks using "gem install therubyracer -v '0.10.2'" but i am getting the following error:</p>
  
  <pre><code>/Users/dennischen/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
  checking for main() in -lobjc... yes
  creating Makefile
  
  make
  compiling rr.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  rr.cpp:48:1: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^
  1 warning generated.
  compiling v8.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_array.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_callbacks.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_context.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_date.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_debug.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_exception.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  v8_exception.cpp:10:16: warning: unused variable 'stack' [-Wunused-variable]
    static void* stack[20];
                 ^
  1 warning generated.
  compiling v8_external.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  v8_external.cpp:10:9: warning: unused variable 'references' [-Wunused-variable]
    VALUE references;
          ^
  1 warning generated.
  compiling v8_function.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_handle.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_locker.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  v8_locker.cpp:45:5: warning: control reaches end of non-void function [-Wreturn-type]
      }
      ^
  v8_locker.cpp:85:5: warning: control reaches end of non-void function [-Wreturn-type]
      }
      ^
  2 warnings generated.
  compiling v8_message.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_object.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  v8_object.cpp:77:19: warning: unused variable 'proto' [-Wunused-variable]
      Handle&lt;Value&gt; proto(rr_rb2v8(prototype));
                    ^
  1 warning generated.
  compiling v8_script.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_string.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_template.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_try_catch.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_v8.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  compiling v8_value.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  v8_value.cpp:100:9: warning: unused function 'ToInt32' [-Wunused-function]
    VALUE ToInt32(VALUE self) {
          ^
  1 warning generated.
  compiling v8_weakref.cpp
  clang: warning: argument unused during compilation: '-rdynamic'
  linking shared-object v8.bundle
  clang: error: no such file or directory: '/Users/dennischen/.rvm/gems/ruby-1.9.3-p194@panini/gems/libv8-3.3.10.4/lib/libv8/build/v8/libv8.a'
  make: *** [v8.bundle] Error 1
  </code></pre>
  
  <p>can anyone help me figure out how to get this gem to work? I have the command line tools installed. </p>