apache ldap support

Hello,

As a newbie in Mac world, I cannot solve this problem :

Mac OS X Apache installation does not support LDAP (stop me if I say something stupid)
In other terms, Mod_ldap and mod authnzldap are not compiled nor in the server, neither as dynamic modules.

So I downloaded apache 2.2.11 sources, and tried to compile mod authnzldap myself via command:
apxs -i -c /usr/src/httpd-2.2.11/modules/aaa/mod authnzldap.c

but I get this error :

/usr/src/httpd-2.2.11/modules/aaa/mod authnzldap.c:41:2: error: #error mod authnzldap requires APR-util to have LDAP support built in. To fix add --with-ldap to ./configure.

So, is there a way to add ldap support to APR-util ?

Thanks for help

Lucien