cmake OpenLDAP examples

ceph/ceph CMakeLists.txt :218 

find_package(OpenLDAP REQUIRED)

scylladb/scylladb auth/CMakeLists.txt :2 

find_package(OpenLDAP REQUIRED
  ldap)

Ericsson/CodeCompass webserver/authenticators/ldap/CMakeLists.txt :1 

find_package(OpenLdap REQUIRED)