Php, FC4 and pcntl support

[Cameron Beattie]

I wish to enable pcntl support in php. The following page 
(http://phprpms.sourceforge.net/pcntl) indicates that this is the case with 
FC4 however phpinfo() reports the following configure command, indicating 
the pcntl support is not enabled:
'./configure' '--build=i386-redhat-linux' '--host=i386-redhat-linux' 
'--target=i386-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' 
'--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' 
'--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' 
'--libdir=/usr/lib' '--libexecdir=/usr/libexec' '--localstatedir=/var' 
'--sharedstatedir=/usr/com' '--mandir=/usr/share/man' 
'--infodir=/usr/share/info' '--cache-file=../config.cache' 
'--with-libdir=lib' '--with-config-file-path=/etc' 
'--with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with-pic' 
'--disable-rpath' '--with-bz2' '--with-curl' '--with-exec-dir=/usr/bin' 
'--with-freetype-dir=/usr' '--with-png-dir=/usr' '--enable-gd-native-ttf' 
'--without-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' 
'--with-jpeg-dir=/usr' '--with-openssl' '--with-png' '--with-pspell' 
'--with-expat-dir=/usr' '--with-pcre-regex=/usr' '--with-zlib' 
'--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' 
'--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' 
'--enable-track-vars' '--enable-trans-sid' '--enable-yp' '--enable-wddx' 
'--with-pear=/usr/share/pear' '--with-kerberos' '--enable-ucd-snmp-hack' 
'--with-unixODBC=shared,/usr' '--enable-memory-limit' '--enable-shmop' 
'--enable-calendar' '--enable-dbx' '--enable-dio' 
'--with-mime-magic=/etc/httpd/conf/magic' '--without-sqlite' 
'--with-libxml-dir=/usr' '--with-xml' '--with-apxs2=/usr/sbin/apxs' 
'--without-mysql' '--without-gd' '--without-odbc' '--disable-dom' 
'--disable-dba'

rpm -q php
php-5.0.4-10.5
rpm -V php
S.5....T  c /etc/php.ini

What is the best way to enable pcntl support?

Regards

Cameron