$OpenBSD: patch-ptlib_m4,v 1.3 2012/06/21 14:23:51 ajacoutot Exp $
--- ptlib.m4.orig	Thu Apr 26 06:47:48 2012
+++ ptlib.m4	Thu Jun 21 11:22:09 2012
@@ -368,7 +368,10 @@ AC_DEFUN([PTLIB_FIND_OPENLDAP],
                             dnl posix4 is required by libldap_r on Solaris
                             ptlib_openldap_libs="-lposix4"
                             ;;
-                            * )
+            openbsd*)
+                            ptlib_openldap_libs="-llber -lldap_r -pthread"
+                            ;;
+            * )
                             ptlib_openldap_libs="-llber -lldap_r"
             esac
 
