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PORuby's MySQL driver not finding required libraries
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  1. PORuby's MySQL driver not finding required libraries
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    copied!<p>Linux 2.6.18-92.el5, ruby 1.8.7, Rails 2.2.2, mysql gem 2.7</p> <p>I installed the MySQL binary distribution under /usr/local, then installed the mysql gem like this:</p> <pre><code>gem install mysql --no-rdoc --no-ri \ -- --with-mysql-include=/usr/local/mysql/include \ --with-mysql-lib=/usr/local/mysql/lib \ --with-mysql-config=/usr/local/mysql/bin/mysql_config </code></pre> <p>When I run <code>irb&gt; require 'mysql'</code> I get the error shown below:</p> <pre><code>irb(main):001:0&gt; require 'rubygems' =&gt; true irb(main):002:0&gt; require 'mysql' LoadError: libmysqlclient.so.16: cannot open shared object file: No such file or directory - /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.so from /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.so from /usr/local/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:36:in `require' from (irb):2 </code></pre> <p>After some Googling I found that I could use <code>ldconfig</code> to configure mysql.so to be available to the whole system. Once I added "/usr/local/ mysql/lib" to /etc/ld.so.conf and ran ldconfig, it worked fine:</p> <pre><code>irb(main):002:0&gt; require 'rubygems' =&gt; true irb(main):003:0&gt; require 'mysql' =&gt; true </code></pre> <p>OK, so I got it to work. But my question is, why was I getting that error? You used to be able to just <code>gem install mysql</code> and it would work. Has anyone else encountered the same error? Using <code>ldconfig</code> seems kind of brittle and unmaintainable. Is there a better solution?</p> <p>Any insight would be greatly appreciated.</p> <p>Thanks,</p> <p>Ethan</p>
 

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