title: Error installing mysql2 with windows
body: <p>It's strange the I can install mysql2 with this command:
  <code>$ gem install mysql2 --platform=ruby -- '--with-mysql-lib="c:\Program Files\MySQL\MySQL Server 5.5\lib" --with-mysql-include="c:\Program Files\MySQL\MySQL Server 5.5\include"'</code> Following is the results:</p>
  
  <pre><code>Temporarily enhancing PATH to include DevKit...
  Building native extensions.  This could take a while...
  Successfully installed mysql2-0.3.10
  1 gem installed
  Installing ri documentation for mysql2-0.3.10...
  Installing RDoc documentation for mysql2-0.3.10...
  </code></pre>
  
  <p>But when I'm running <code>bundle install</code> (apperently I have a lot of gems needs to install), it is failed to install mysql2, so <code>bundle install</code> stopped there, that really drives me crazy... anyone could help? a tons of thanks!
  Below is the result from <code>bundle install</code>:</p>
  
  <pre><code>Installing mysql2 (0.3.8) with native extensions
  Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension
  .
  
          c:/Ruby192/bin/ruby.exe extconf.rb
  checking for rb_thread_blocking_region()... yes
  checking for rb_wait_for_single_fd()... no
  checking for main() in -llibmysql... 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
          --with-make-prog
          --without-make-prog
          --srcdir=.
          --curdir
          --ruby=c:/Ruby192/bin/ruby
          --with-mysql-dir
          --without-mysql-dir
          --with-mysql-include
          --without-mysql-include=${mysql-dir}/include
          --with-mysql-lib
          --without-mysql-lib=${mysql-dir}/lib
          --with-libmysqllib
          --without-libmysqllib
  
  
  Gem files will remain installed in G:/Desktop/20090319-/Rails Examples/ClockingI
  T/vendor/bundle/ruby/1.9.1/gems/mysql2-0.3.8 for inspection.
  Results logged to G:/Desktop/20090319-/Rails Examples/ClockingIT/vendor/bundle/r
  uby/1.9.1/gems/mysql2-0.3.8/ext/mysql2/gem_make.out
  An error occured while installing mysql2 (0.3.8), and Bundler cannot continue.
  Make sure that `gem install mysql2 -v '0.3.8'` succeeds before bundling.
  </code></pre>