ahasenack@terra.com.br wrote:

On Fri, Feb 02, 2007 at 04:03:43PM +0000, ahasenack@terra.com.br wrote:

...

==> rewrite_context_apply [depth=1] string='(objectClass=*)' ==> rewrite_context_apply [depth=1] res={0,'NULL'} [rw] searchFilter: "(objectClass=*)" -> "(objectClass=*)" /home/andreas/updates-svn/openldap/BUILD/openldap-2.3.33/servers/slapd/.libs/lt-slapd: symbol lookup error: +../servers/slapd/back-meta/.libs/back_meta-2.3.so.0: undefined symbol: ldap_back_proxy_authz_ctrl

Howard debugged this on IRC and it turns out that our (mine and _ranger_'s) libunixodbc has lt_dl* symbols in it. Relinking slapd without the unixodbc lib fixes it.

Yes, so there are two potential issues - the unixodbc shared library seems to be statically linked with an older version of libltdl. I didn't run into this problem on my build because I don't have that odbc library. Anyway, due to the link order of the libraries, the lt_dlopen in this library gets used before the linker resolves to the system's libltdl.so, and it seems that this version of lt_dlopen doesn't automatically export the symbols of modules that it loads.

I'm guessing the reason this is a problem in 2.3.33 and not in 2.3.32 is because there is a new dependency in 2.3.33 between back-meta and back-ldap.

The other part of this is that the slapd binary should not be getting linked against -lodbc when back_sql is built as a module.

Although, if back-sql is built statically, and other backends are dynamic, this problem may still crop up. It seems that fixing -lodbc would be required then.