title: Not able to use mysql2 gem with Rails 4.1.5 in RubyMine
body: <p>I am trying to use the mysql 2 gem with Rails, so I added <code>gem 'mysql2'</code>. I am not able to install it using <code>bundle install</code>, and it gives me this error.</p>
  
  <pre><code>Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  
      /Users/Ben/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20150307-17143-1jx7cob.rb extconf.rb 
  checking for ruby/thread.h... yes
  checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
  checking for rb_thread_blocking_region()... no
  checking for rb_wait_for_single_fd()... yes
  checking for rb_hash_dup()... yes
  checking for rb_intern3()... yes
  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
          --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/Ben/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME)
          --with-mysql-dir
          --without-mysql-dir
          --with-mysql-include
          --without-mysql-include=${mysql-dir}/include
          --with-mysql-lib
          --without-mysql-lib=${mysql-dir}/lib
          --with-mysql-config
          --without-mysql-config
          --with-mysql-dir
          --without-mysql-dir
          --with-mysql-include
          --without-mysql-include=${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
  
  extconf failed, exit code 1
  
  Gem files will remain installed in /Users/Ben/.rvm/gems/ruby-2.2.0/gems/mysql2-0.3.18 for inspection.
  Results logged to /Users/Ben/.rvm/gems/ruby-2.2.0/extensions/x86_64-darwin-14/2.2.0/mysql2-0.3.18/gem_make.out
  An error occurred while installing mysql2 (0.3.18), and Bundler cannot continue.
  Make sure that `gem install mysql2 -v '0.3.18'` succeeds before bundling.
  </code></pre>
  
  <p>I have no idea how to get it to work, so any help would be appreciated.</p>
  
  <p>Here is some info on my computer.
  <code>ruby -v</code> => <code>ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]</code></p>
  
  <p><code>gem 'rails', '4.1.5'</code> (rails -v won't work)</p>
  
  <p><code>bundler -v</code> => <code>Bundler version 1.8.4</code></p>
  
  <p>OS: Mac Yosemite</p>