+ if test yes = "$with_ldap" -a yes != "$ldap_needs_lber";then
+dnl Need this check since `LDAP_OPT_ON' is (currently) used only with
+dnl `ldap_set_option', and the latter may not exist at all, for which
+dnl is testing later. So `LDAP_OPT_ON' is not necessarily defined.
+ AC_CACHE_CHECK([for LDAP_OPT_ON definition],xe_cv_have_LDAP_OPT_ON,
+ [AC_TRY_COMPILE(
+[#include <lber.h>
+#include <ldap.h>
+#ifdef LDAP_OPT_ON
+/* Relying on const defined by ac_c_const (upper case). */
+const void *const v = LDAP_OPT_ON;
+#else /* !defined (LDAP_OPT_ON) */
+choke me
+#endif /* !defined (LDAP_OPT_ON) */],[],
+ [xe_cv_have_LDAP_OPT_ON=yes],
+ [xe_cv_have_LDAP_OPT_ON=no])])
+ if test yes = "$xe_cv_have_LDAP_OPT_ON";then
+ AC_CACHE_CHECK([LDAP_OPT_ON linking],
+ xe_cv_LDAP_OPT_ON_links,
+ [xe_save_LIBS="$LIBS"
+ LIBS="-lldap $LIBS"
+AC_TRY_LINK(
+[#include <lber.h>
+#include <ldap.h>
+const void *const v = LDAP_OPT_ON;],[],
+ xe_cv_LDAP_OPT_ON_links=yes,
+ xe_cv_LDAP_OPT_ON_links=no)
+ LIBS="$xe_save_LIBS"])
+dnl In some openldap installations other `ldap_*' functions link with
+dnl `-lldap' alone, but `LDAP_OPT_ON' requires `-llber'.
+ if test yes != "$xe_cv_LDAP_OPT_ON_links";then
+ ldap_needs_lber=yes ldap_other_libs=-llber
+ AC_CACHE_CHECK([LDAP_OPT_ON linking with -llber],
+ xe_cv_LDAP_OPT_ON_links_w_lber,
+ [xe_save_LIBS="$LIBS"
+ LIBS="-lldap $ldap_other_libs $LIBS"
+AC_TRY_LINK(
+[#include <lber.h>
+#include <ldap.h>
+const void *const v = LDAP_OPT_ON;],[],
+ xe_cv_LDAP_OPT_ON_links_w_lber=yes,
+ xe_cv_LDAP_OPT_ON_links_w_lber=no)
+ LIBS="$xe_save_LIBS"])
+ if test yes != "$xe_cv_LDAP_OPT_ON_links_w_lber";then
+ with_ldap=no
+ fi
+ fi
+ fi
+ fi