title: Error when with Xcode 5.0 and Rcpp (Command Line Tools ARE installed)
body: <p>I have a new iMac and I'm trying to run code using the Rcpp library that has been working on both my old iMac and Macbook Pro without issue.  I have tried everything I can't seem to figure out what the issue is.</p>
  
  <p>Xcode 5.0 downloaded. Command line Tools then installed.  R3.0.2 is installed.
  I downloaded a gcc compiler.  When I type gcc in terminal - I get "clang:" - which is good, I think.</p>
  
  <p>The error I get is copied below.  Thanks in advance for any ideas and advice.</p>
  
  <pre><code>Error (in R console):
  llvm-g++-4.2 -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG  -I/usr/local/include  -I"/Library/Frameworks/R.framework/Versions/3.0/Resources/library/Rcpp/include"    -fPIC  -mtune=core2 -g -O2  -c SBM-Ccode.cpp -o SBM-Ccode.o 
  Error in sourceCpp("SBM-Ccode.cpp") : 
    Error 1 occurred building shared library.
  
  WARNING: The tools required to build C++ code for R were not found.
  
  Please install Command Line Tools for XCode (or equivalent).
  
  /bin/sh: llvm-g++-4.2: command not found
  make: *** [SBM-Ccode.o] Error 127
  </code></pre>