title: Error upgrading 1.9.2p180 to 1.9.3 with RVM on Lion
body: <p>I'm getting this error when running the following command:</p>
  
  <pre><code>$ rvm upgrade 1.9.2-p180 1.9.3-p0
  Are you sure you wish to upgrade from ruby-1.9.2-p180 to     ruby-1.9.3-p0? (Y/n): Y
  Installing new ruby ruby-1.9.3-p0
  Installing Ruby from source to: /Users/ericjones/.rvm/rubies/ruby-1.9.3-p0, this may take a while depending on your cpu(s)...
  
  ruby-1.9.3-p0 - #fetching 
  ruby-1.9.3-p0 - #extracted to /Users/ericjones/.rvm/src/ruby-1.9.3-p0 (already extracted)
  Fetching yaml-0.1.4.tar.gz to /Users/ericjones/.rvm/archives
  Extracting yaml-0.1.4.tar.gz to /Users/ericjones/.rvm/src
  Configuring yaml in /Users/ericjones/.rvm/src/yaml-0.1.4.
  Compiling yaml in /Users/ericjones/.rvm/src/yaml-0.1.4.
  Installing yaml to /Users/ericjones/.rvm/usr
  ruby-1.9.3-p0 - #configuring 
  ruby-1.9.3-p0 - #compiling 
  ERROR: Error running 'make ', please read /Users/ericjones/.rvm/log/ruby-1.9.3-p0/make.log
  ERROR: There has been an error while running make. Halting the installation.
  ERROR: Unable to install ruby ruby-1.9.3-p0.         Please install it manually to continue.
  </code></pre>
  
  <p>When i tail the log i get the following output:</p>
  
  <pre><code>installing default stringio libraries
  installing default strscan libraries
  installing default syck libraries
  installing default syslog libraries
  linking shared-object tcltklib.bundle
  ld: in /usr/local/lib/libiconv.2.dylib, missing required architecture x86_64 in file for architecture x86_64
  collect2: ld returned 1 exit status
  make[2]: *** [../../.ext/x86_64-darwin11.2.0/tcltklib.bundle] Error 1
  make[1]: *** [ext/tk/all] Error 2
  make: *** [build-ext] Error 2
  </code></pre>
  
  <p>Any ideas on how to move forward?</p>