Just run "make" to build the module and "make install" (as root) to install the module. This will use Apache's apxs to build/install from source. Have a look at vhost_ldap.conf to learn about configuration. Your LDAP server needs to include mod_vhost_ldap.schema. If you do not use OpenLDAP you are on your own to build a schema. You should configure the LDAP server to maintain indices on apacheServerName, apacheServerAlias and anything you use in your additional search filter.