title: $PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
body: <p>I am trying to setup my machine with pecl_http and memcache and in both cases, I get similar errors. This is on MAC OS X 10.7.3 (lion) and I also have XCODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch x86_64' environment variables set. So please help with what I need to do</p>
  
  <pre><code>bash-3.2# **sudo pecl install pecl_http-1.7.1**
  downloading pecl_http-1.7.1.tgz ...
  Starting to download pecl_http-1.7.1.tgz (174,098 bytes)
  .....................................done: 174,098 bytes
  71 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>