Hello, On several AIX BF animals such as tern, I see evidence that it might be using IBM LDAP: checking for ldap_initialize... no And yet the configure options apparently intended to use OpenLDAP: configure: using CPPFLAGS= -I/home/nm/sw/nopath/libxml2-32/include/libxml2 -I/home/nm/sw/nopath/uuid-32/include -I/home/nm/sw/nopath/openldap-32/include -I/home/nm/sw/nopath/icu58.2-32/include -I/home/nm/sw/nopath/libxml2-32/include configure: using LDFLAGS= -L/home/nm/sw/nopath/libxml2-32/lib -L/home/nm/sw/nopath/uuid-32/lib -L/home/nm/sw/nopath/openldap-32/lib -L/home/nm/sw/nopath/icu58.2-32/lib -L/home/nm/sw/nopath/libxml2-32/lib Another explanation is that it is actually using OpenLDAP, but it's a version so ancient that it doesn't have OpenLDAP's non-standard ldap_initialize() function (that'd put it in the 20th century, pre-2.0). Personally I think it's valuable to have the IBM LDAP client library tested in the build farm, since we already have the OpenLDAP, Microsoft and Apple libraries covered. I wonder if that is the complete set of surviving libldap implementations. Would it be useful for the buildfarm to dump ldd (or equivalent) output for the binaries it's running so that we can see which libraries it finished up linking? -- Thomas Munro https://enterprisedb.com