title: phpize won't work on Mac OS X Lion
body: <p>I try to install xdebug but I get the follow error message about 'phpize'.
  How can I fix this thing?</p>
  
  <pre><code>leny:~ nick$ sudo pecl install xdebug
  Password:
  downloading xdebug-2.1.2.tgz ...
  Starting to download xdebug-2.1.2.tgz (304,229 bytes)
  ............done: 304,229 bytes
  66 source files, building
  running: phpize
  Configuring for:
  PHP Api Version:         20090626
  Zend Module Api No:      20090626
  Zend Extension Api No:   220090626
  Cannot find autoconf. Please check your autoconf installation and the
  $PHP_AUTOCONF environment variable. Then, rerun this script.
  
  ERROR: `phpize' failed
  </code></pre>