title: Can't install Ruby 2.0.0 with rvm
body: <p>I tried to install Ruby 2.0.0 with <code>rvm install 2.0.0</code> this was my output:</p>
  
  <pre><code>Searching for binary rubies, this might take some time.
  No binary rubies available for: osx/10.8/x86_64/ruby-1.9.3-p392.
  Continuing with compilation. Please read 'rvm mount' to get more information on binary   rubies.
  Installing requirements for osx/10.8/x86_64, might require sudo password
  Password:
  DEBUG: Copying /Users/Family/Library/Preferences/com.apple.dt.Xcode.plist to      /opt/local/var/macports/home/Library/Preferences
  DEBUG: MacPorts sources location: /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
  ---&gt;  Updating MacPorts base sources using rsync
  receiving file list ... done
  
  sent 36 bytes  received 69 bytes  70.00 bytes/sec
  total size is 3594240  speedup is 34230.86
  receiving file list ... done
  
  sent 36 bytes  received 76 bytes  224.00 bytes/sec
  total size is 512  speedup is 4.57
  DEBUG: successful verification with key /opt/local/share/macports/macports-pubkey.pem
  DEBUG: /usr/bin/tar -C   /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/tmp -xf /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/base.tar
  MacPorts base version 2.1.3 installed,
  DEBUG: Rebuilding and reinstalling MacPorts if needed
  MacPorts base version 2.1.3 downloaded.
  ---&gt;  Updating the ports tree
  Synchronizing local ports tree from rsync://rsync.macports.org/release/tarballs/ports.tar
  DEBUG: /usr/bin/rsync -rtzv --delete-after   rsync://rsync.macports.org/release/tarballs/ports.tar /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
  receiving file list ... done
  
  sent 36 bytes  received 70 bytes  212.00 bytes/sec
  total size is 55050240  speedup is 519341.89
  DEBUG: /usr/bin/rsync -rtzv --delete-after      rsync://rsync.macports.org/release/tarballs/ports.tar.rmd160    /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
  receiving file list ... done
  
  sent 36 bytes  received 77 bytes  226.00 bytes/sec
  total size is 512  speedup is 4.53
  DEBUG: successful verification with key /opt/local/share/macports/macports-pubkey.pem
  DEBUG: /usr/bin/tar -C /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/tmp -xf /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports.tar
  Creating port index in /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports
  
  Total number of ports parsed:   0 
  Ports successfully parsed:  0 
  Ports failed:           0 
  Up-to-date ports skipped:   16692
  
  ---&gt;  MacPorts base is already the latest version
  DEBUG: Setting MacPorts sources ownership to root
  
  The ports tree has been updated. To upgrade your installed ports, you should run
  port upgrade outdated
  Missing required packages: autoconf, automake, libtool, pkg-config, libiconv, libyaml, libffi, readline, libxml2, libxslt, libksba, openssl, curl-ca-bundle, sqlite3, zlib, ncurses, gdbm.
  Installing Ruby from source to: /Users/Family/.rvm/rubies/ruby-1.9.3-p392, this may take a       while depending on your cpu(s)...
  ruby-1.9.3-p392 - #downloading ruby-1.9.3-p392, this may take a while depending on your connection...
  ######################################################################## 100.0%
  ruby-1.9.3-p392 - #extracting ruby-1.9.3-p392 to /Users/Family/.rvm/src/ruby-1.9.3-p392
  ruby-1.9.3-p392 - #extracted to /Users/Family/.rvm/src/ruby-1.9.3-p392
  ruby-1.9.3-p392 - #configuring..........
  Error running './configure --prefix=/Users/Family/.rvm/rubies/ruby-1.9.3-p392 --disable-     install-doc --without-tcl --without-tk --enable-shared',
  please read /Users/Family/.rvm/log/ruby-1.9.3-p392/configure.log
  There has been an error while running configure. Halting the installation.
  </code></pre>
  
  <p>I am running mac osx Mountan Lion. It dose the same thing if i try to install 1.9.3
  What is my problem and how can i fix it? I am new to RVM and ruby so it might be just a simple mistake. Thanks in advance </p>