--- openldap-2.3.12/aclocal.m4.orig	2005-11-24 19:07:16 +0200
+++ openldap-2.3.12/aclocal.m4	2005-11-24 19:08:28 +0200
@@ -17,6 +17,21 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
+# From Ulrich Drepper.
+
+# serial 1
+
+AC_DEFUN([AM_TYPE_PTRDIFF_T],
+  [AC_CACHE_CHECK([for ptrdiff_t], am_cv_type_ptrdiff_t,
+     [AC_TRY_COMPILE([#include <stddef.h>], [ptrdiff_t p],
+		     am_cv_type_ptrdiff_t=yes, am_cv_type_ptrdiff_t=no)])
+   if test $am_cv_type_ptrdiff_t = yes; then
+     AC_DEFINE(HAVE_PTRDIFF_T,1,[Define if system has ptrdiff_t type])
+   fi
+])
+
+m4_pattern_allow(LIBOBJS)
+
 # AM_AUTOMAKE_VERSION(VERSION)
 # ----------------------------
 # Automake X.Y traces this macro to ensure aclocal.m4 has been