php-doc-en/reference/pcntl/configure.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<section xml:id="pcntl.installation" xmlns="http://docbook.org/ns/docbook">
 &reftitle.install;
 <para>
  Process Control support in PHP is not enabled by default.
  You have to compile the CGI or CLI version of PHP with
  <option role="configure">--enable-pcntl</option> configuration
  option when compiling PHP to enable Process Control support.
 </para>
 <note>
  <para>
   Currently, this module will not function on non-Unix platforms
   (Windows).
  </para>
 </note>
</section>

<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->