title: Ruby gem mysql2 install failing
body: <p>When I try to install the mysql2 gem, it fails with no apparent errors. Does anyone know what to do to work around this so mysql2 installs?</p>
  
  <pre><code>$ sudo gem install mysql2
  Building native extensions.  This could take a while...
  ERROR:  Error installing mysql2:
      ERROR: Failed to build gem native extension.
  
  /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
  checking for rb_thread_blocking_region()... no
  checking for mysql_query() in -lmysqlclient... no
  checking for main() in -lm... yes
  checking for mysql_query() in -lmysqlclient... no
  checking for main() in -lz... yes
  checking for mysql_query() in -lmysqlclient... no
  checking for main() in -lsocket... no
  checking for mysql_query() in -lmysqlclient... no
  checking for main() in -lnsl... no
  checking for mysql_query() in -lmysqlclient... no
  checking for main() in -lmygcc... no
  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
      --with-make-prog
      --without-make-prog
      --srcdir=.
      --curdir
      --ruby=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
      --with-mysql-config
      --without-mysql-config
      --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-mysqlclientlib
      --without-mysqlclientlib
      --with-mlib
      --without-mlib
      --with-mysqlclientlib
      --without-mysqlclientlib
      --with-zlib
      --without-zlib
      --with-mysqlclientlib
      --without-mysqlclientlib
      --with-socketlib
      --without-socketlib
      --with-mysqlclientlib
      --without-mysqlclientlib
      --with-nsllib
      --without-nsllib
      --with-mysqlclientlib
      --without-mysqlclientlib
      --with-mygcclib
      --without-mygcclib
      --with-mysqlclientlib
      --without-mysqlclientlib
  
  
  Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6 for inspection.
  Results logged to /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/ext/mysql2/gem_make.out
  </code></pre>