title: Error when installing dm-mysql-adapter
body: <p>I am very new to Ruby . I installed DataMapper and I am trying to install dm-mysql-adapter-1.0.2 gem . But when I try to install , I get the below error . I am using ubuntu OS .</p>
  
  <pre><code>vinoth@vinoth-laptop:~/Downloads$ gem install dm-mysql-adapter-1.0.2 -- --with-mysql-                    lib=/usr/lib/mysql -- --with-mysql-conf=/usr/bin/mysql 
  WARNING:  Installing to ~/.gem since /home/vinoth/gems and
  /home/vinoth/gems/bin aren't both writable.
  WARNING:  You don't have /home/vinoth/.gem/ruby/1.8/bin in your PATH,
  gem executables will not run.
  Building native extensions.  This could take a while...
  ERROR:  Error installing dm-mysql-adapter-1.0.2:
  ERROR: Failed to build gem native extension.
  
  /usr/bin/ruby1.8 extconf.rb --with-mysql-lib=/usr/lib/mysql -- --with-mysql-     conf=/usr/bin/mysql
  checking for mysql_query() in -lmysqlclient... no
  *** 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
    -  ........
  
  
  Gem files will remain installed in /home/vinoth/.gem/ruby/1.8/gems/do_mysql-0.10.2 for  inspection.
  Results logged to /home/vinoth/.gem/ruby/1.8/gems/do_mysql-0.10.2/ext/do_mysql/gem_make.out
  </code></pre>
  
  <p>Am I missing something ? </p>
  
  <p>Additional information .</p>
  
  <p>Ruby Version : ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]<br>
  Gem Version : 1.3.5</p>