--- gforth/configure.in	2008/10/12 16:23:32	1.253
+++ gforth/configure.in	2008/10/13 20:20:56	1.254
@@ -118,6 +118,8 @@ AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int
 AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
 AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
 AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
+AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
+AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
 AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
 AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
 AC_ARG_VAR(condbranch_opt, [enable (1) or disable (0) using two dispatches for conditional branches])