title: command line tools for new 10.9 OSX for ruby gems?
body: <p>After installing OSX Mavericks 10.9 demo, Im getting this after running bundle</p>
  
  <pre><code>    Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  
      /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb 
  extconf.rb:17: Use RbConfig instead of obsolete and deprecated Config.
  checking for socket() in -lsocket... *** extconf.rb failed ***
  Could not create Makefile due to some reason, probably lack of
  necessary libraries and/or headers.  Check the mkmf.log file for more
  details.  You may need configuration options.
  
  Provided configuration options:
      --with-opt-dir
      --without-opt-dir
      --with-opt-include
      --without-opt-include=${opt-dir}/include
      --with-opt-lib
      --without-opt-lib=${opt-dir}/lib
      --with-make-prog
      --without-make-prog
      --srcdir=.
      --curdir
      --ruby=/Users/sandric/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
      --with-iconv-dir
      --without-iconv-dir
      --with-iconv-include
      --without-iconv-include=${iconv-dir}/include
      --with-iconv-lib
      --without-iconv-lib=${iconv-dir}/lib
      --with-zlib-dir
      --without-zlib-dir
      --with-zlib-include
      --without-zlib-include=${zlib-dir}/include
      --with-zlib-lib
      --without-zlib-lib=${zlib-dir}/lib
      --with-socketlib
      --without-socketlib
  /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
  You have to install development tools first.
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:461:in `try_link0'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:476:in `try_link'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:619:in `try_func'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:845:in `block in have_library'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:254:in `open'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:254:in `open'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
      from /Users/sandric/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/mkmf.rb:840:in `have_library'
      from extconf.rb:27:in `&lt;main&gt;'
  
  
  Gem files will remain installed in /Users/sandric/.bundler/tmp/5282/gems/libxml-ruby-2.6.0 for inspection.
  Results logged to /Users/sandric/.bundler/tmp/5282/gems/libxml-ruby-2.6.0/ext/libxml/gem_make.out
  An error occurred while installing libxml-ruby (2.6.0), and Bundler cannot continue.
  Make sure that `gem install libxml-ruby -v '2.6.0'` succeeds before bundling.
  </code></pre>
  
  <p>I think that I do not have command line tools, so I tried to download some. It found out that there is no usual link for this in my XCode (it is 4, not 5, dont know why. If there is some way of installing fifth xcode - please help). So I went to apple developers webpage and not found command line tools for 10.9. I tried for 10.8 - it prints "Try install for 10.7", after trying with tools for 10.7 - it prints "try for 10.8".</p>
  
  <p>Please, help. I'll provide all info for help.</p>