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    <p>I have looked through multiple questions on stackoverflow and they all gave different solutions to the problem. I git cloned a rails project, ran bundle install, and created a new gemset in rvm using 1.9.3 ruby and figured rails 3.2.13 will also get installed with the bundle install command. In the past I solved this issue by using this guide, <a href="http://www.randomactsofsentience.com/2013/05/gem-install-mysql2-missing-mysqlh-on-os.html" rel="nofollow">http://www.randomactsofsentience.com/2013/05/gem-install-mysql2-missing-mysqlh-on-os.html</a>. I couldn't find mysql folder in user/local, the guide said I need to edit a file and get rid of somelines to resolve the mysql.h missing issue. This file no longer exist? I couldn't find it? maybe I am missing dependencies but I found linux installation ways of these dependencies? maybe I need to install mysql5.5 instead of the latest version but not sure how to specify that? which one of these will solve this for me? </p> <pre><code>Installing mysql2 (0.3.11) Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /Users/judyngai/.rvm/rubies/ruby-1.9.3-p429/bin/ruby extconf.rb checking for rb_thread_blocking_region()... yes checking for rb_wait_for_single_fd()... yes checking for mysql.h... no checking for mysql/mysql.h... no ----- mysql.h is missing. please check your installation of mysql and try again. ----- *** 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/judyngai/.rvm/rubies/ruby-1.9.3-p429/bin/ruby --with-mysql-config --without-mysql-config Gem files will remain installed in /Users/judyngai/.rvm/gems/ruby-1.9.3-p429@spreeversion /gems/mysql2-0.3.11 for inspection. Results logged to /Users/judyngai/.rvm/gems/ruby-1.9.3-p429@spreeversion/gems/mysql2-0.3.11/ext/mysql2/gem_make.out An error occurred while installing mysql2 (0.3.11), and Bundler cannot continue. Make sure that `gem install mysql2 -v '0.3.11'` succeeds before bundling. </code></pre>
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