Enabling PEAR logging with PHP 4.2.2

I have configured, built, and installed PHP 4.2.2. I have tested the installation using horde's test.php script and it tells me: PEAR

    * PEAR - Yes
    * Recent PEAR - Yes
    * Mail::RFC822 - Yes
    * Log - No
    * Make sure you're using a recent version of PEAR which includes the Log class.
    * DB - Yes

I would appreciate recommendations as to what I can do to meet this requirement for the PEAR Log class. php config: LDFLAGS='-lclua -limc' \ './configure' \ '--with-mysql=/usr/local/mysql' \ '--with-imap' \ '--with-kerberos=/usr/local' \ '--with-ldap' \ '--enable-cli' \ '--with-gettext' \ '--enable-discard-path' \ '--prefix=/usr/local/test' - Vicki