title: Error when trying to install app with mysql2 gem
body: <p>Im trying to install an open source rails 3.2.21 application that uses the <code>mysql2</code> gem, but when i try and run the <code>bundle</code> commant I get the following error:</p>
  
  <pre><code>Fetching: mysql2-0.3.18.gem (100%)
  Building native extensions.  This could take a while...
  p
  ERROR:  Error installing mysql2:
      ERROR: Failed to build gem native extension.
  
      /Users/my_username/.rvm/rubies/ruby-2.1.2/bin/ruby -r ./siteconf20150614-72129-orqsb7.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()... yes
  checking for rb_wait_for_single_fd()... yes
  checking for rb_hash_dup()... yes
  checking for rb_intern3()... yes
  -----
  Using mysql_config at /usr/local/bin/mysql_config
  -----
  checking for mysql.h... yes
  checking for errmsg.h... yes
  checking for mysqld_error.h... yes
  -----
  Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
  -----
  -----
  Setting libpath to /usr/local/Cellar/mysql/5.6.25/lib
  -----
  creating Makefile
  
  make "DESTDIR=" clean
  
  make "DESTDIR="
  compiling client.c
  compiling infile.c
  compiling mysql2_ext.c
  compiling result.c
  linking shared-object mysql2/mysql2.bundle
  ld: warning: directory not found for option '-L/Users/travis/.sm/pkg/active/lib'
  ld: library not found for -lssl
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  make: *** [mysql2.bundle] Error 1
  
  make failed, exit code 2
  
  Gem files will remain installed in /Users/my_username/.rvm/rubies/ruby-2.1.2/lib/ruby/gems/2.1.0/gems/mysql2-0.3.18 for inspection.
  Results logged to /Users/my_username/.rvm/rubies/ruby-2.1.2/lib/ruby/gems/2.1.0/extensions/x86
  </code></pre>
  
  <p>I tried uninstalling every version of <code>mysql</code> I installed via homebrew and reinstalling them, like so:</p>
  
  <pre><code>brew uninstall --force mysql &amp;&amp; brew install mysql
  </code></pre>
  
  <p>Then running:</p>
  
  <pre><code>sudo gem install mysql2
  </code></pre>
  
  <p>As suggested by a number of similar questions asked on here, but it still results in the same error as above.</p>
  
  <p>Please could someone offer guidance on how to get this up and running?</p>