title: Why do I get a Readline error when trying to start rails console?
body: <p>UPDATE: I probably messed up my system while trying solutions found somewhere else. I started from scratch and Ruby 1.9.3 installed without a hitch. Now to try to get ree-1.8.7 to play nice alongside...</p>
  
  <hr>
  
  <p>I'm trying to install Ruby 1.9.3 using RVM on Kubuntu (11.10 I believe). I've been having plenty of issues with Readline so far, but found the answer to all but this one.</p>
  
  <p>I installed Ruby 1.9.3 this way:</p>
  
  <pre><code>rvm install 1.9.3
  # Install of ruby-1.9.3-p0 - #complete 
  cd ~/.rvm/src/ruby-1.9.3-p0/ext/readline/
  ~/.rvm/src/ruby-1.9.3-p0/ext/readline $ ../../ruby extconf.rb --with-editline-dir="/usr" --with-readline-dir="/usr"
  # any other way of doing this resulted in simply readline not being loaded when trying to start the console
  # I have libreadline6 and libreadline6-dev installed (and all the packages requested in `rvm requirements`
  make install
  # compiling readline.c                                                                                                                                                                                      
  # linking shared-object readline.so                                                                                                                                                                         
  # /usr/bin/install -c -m 0755 readline.so /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/x86_64-linux                                                                                    
  # installing default readline libraries 
  </code></pre>
  
  <p>So far everything looks to have run properly but when I try to start the console I get this error:</p>
  
  <pre><code>/home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/irb/completion.rb:9:in `require': /home/mbillard/.rvm/usr/lib/libreadline.so.6: undefined symbol: UP - /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/x86_64-linux/readline.so (LoadError)
    from /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/irb/completion.rb:9:in `&lt;top (required)&gt;'
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands/console.rb:3:in `require'
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands/console.rb:3:in `&lt;top (required)&gt;'
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands.rb:38:in `require'
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands.rb:38:in `&lt;top (required)&gt;'
    from script/rails:6:in `require'
    from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>I tried using <code>rvm install 1.9.3 --with-readline-dir="$rvm_path/usr"</code> and using <code>$rvm_path</code> when compiling Readline in the command above but those resulted in this error:</p>
  
  <pre><code>checking for tgetnum() in -lncurses... yes
  checking for readline/readline.h... yes
  checking for readline/history.h... yes
  checking for readline() in -lreadline... no
  checking for readline() in -ledit... no
  checking for editline/readline.h... no
  </code></pre>
  
  <p>So, thanks for any help you can provide.</p>