ld: fatal: Symbol referencing errors.

Hi, I was wondewring if someone know the reason to the error below, I'm no Unix guru and my sysadm says he cant get ldap to work due to this, is there anyone who tell me what to tell him to get it to work? greetings Jimmy Lund Sweden //ERROR ENCLOSED BELOW. gcc -DSOLARIS2=260 -I/usr/local/src/php-4.0.0 -I/usr/local/src/php-4.0.0/Zend -I/usr/local/src/php-4.0.0/Zend -I/usr/local/src/php-4.0.0 ./apaci -o httpd buildmark.o modules.o modules/php4/libphp4.a modules/extra/libextra.a modules/standard/libstandard.a main/libmain.a ./os/unix/libos.a ap/libap.a -R/usr/ucblib -R/usr/local/ldap-3.3/lib -R/usr/local/mysql-3.22.32/lib/mysql -L/usr/ucblib -L/usr/local/ldap-3.3/lib -L/usr/local/mysql-3.22.32/lib/mysql -Lmodules/php4 -L../modules/php4 -L../../modules/php4 -lmodphp4 -ldb -lpam -ldl -lmysqlclient -lresolv -lresolv -lm -ldl -lcrypt -lnsl -lsocket -lsocket -lsocket -lnsl -lldap -llber -lavl -lldbm -lldif -llthread -lphp4

Undefined                       first referenced
 symbol                             in file
ldap_module                         modules.o

ld: fatal: Symbol referencing errors. No output written to httpd collect2: ld returned 1 exit status