Error while installing php with ldap

Hi all, I install php with ldap enable as follow, but got some erros.. please help !!!! thanks Kate #./configure --with-ldap # make gcc -I. -I/export/home/kate/source/php-4.0.4pl1/ext/ldap -I/export/home/kate/source/php-4.0.4pl1/main -I/export/home/kate/source/php-4.0.4pl1 -I/export/home/kate/source/php-4.0.4pl1/Zend -I/export/home/kate/source/php-4.0.4pl1/ext/mysql/libmysql -I/export/home/kate/source/php-4.0.4pl1/ext/xml/expat/xmltok -I/export/home/kate/source/php-4.0.4pl1/ext/xml/expat/xmlparse -I/export/home/kate/source/php-4.0.4pl1/TSRM -D_POSIX_PTHREAD_SEMANTICS -DXML_BYTE_ORDER=12 -g -O2 -c ldap.c && touch ldap.lo ldap.c: In function `_get_lderrno': ldap.c:477: dereferencing pointer to incomplete type ldap.c: In function `php_ldap_do_search': ldap.c:657: dereferencing pointer to incomplete type ldap.c:666: dereferencing pointer to incomplete type ldap.c:675: dereferencing pointer to incomplete type *** Error code 1 make: Fatal error: Command failed for target `ldap.lo' Current working directory /export/home/kate/source/php-4.0.4pl1/ext/ldap *** Error code 1 make: Fatal error: Command failed for target `all-recursive'