--- xemacs-21.4.13/src/m/powerpc64.h.ppc64	2004-01-21 10:11:35.000000000 +0100
+++ xemacs-21.4.13/src/m/powerpc64.h	2004-01-21 10:11:35.000000000 +0100
@@ -0,0 +1,86 @@
+/* machine description file for PowerPC 64-bit.
+   Copyright (C) 1994, 2001, 2002 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+
+/* Now define a symbol for the cpu type, if your compiler
+   does not define it automatically:
+   Ones defined so far include vax, m68000, ns16000, pyramid,
+   orion, tahoe, APOLLO and many others */
+
+/* Use type EMACS_INT rather than a union, to represent Lisp_Object */
+/* This is desirable for most machines.  */
+
+#define NO_UNION_TYPE
+
+/* Define the type to use.  */
+#define EMACS_INT long
+#define EMACS_UINT unsigned long
+#define SPECIAL_EMACS_INT
+
+/* Data type of load average, as read out of kmem.  */
+
+#define LOAD_AVE_TYPE long
+
+/* Convert that into an integer that is 100 for a load average of 1.0  */
+
+#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
+
+/* Define C_ALLOCA if this machine does not support a true alloca
+   and the one written in C should be used instead.
+   Define HAVE_ALLOCA to say that the system provides a properly
+   working alloca function and it should be used.
+   Define neither one if an assembler-language alloca
+   in the file alloca.s should be used.  */
+
+#define HAVE_ALLOCA
+
+/* Some really obscure 4.2-based systems (like Sequent DYNIX)
+ * do not support asynchronous I/O (using SIGIO) on sockets,
+ * even though it works fine on tty's.  If you have one of
+ * these systems, define the following, and then use it in
+ * config.h (or elsewhere) to decide when (not) to use SIGIO.
+ *
+ * You'd think this would go in an operating-system description file,
+ * but since it only occurs on some, but not all, BSD systems, the
+ * reasonable place to select for it is in the machine description
+ * file.
+ */
+
+/* #define NO_SOCK_SIGIO */
+
+#if defined(__OpenBSD__)
+#define ORDINARY_LINK
+#endif
+
+#if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
+# define TEXT_END ({ extern int _etext; &_etext; })
+#endif
+
+#if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
+#define HAVE_TEXT_START
+#endif
+
+#define PNTR_COMPARISON_TYPE unsigned long
+
+#undef START_FILES
+#define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
+
+#undef LIB_STANDARD
+#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
--- xemacs-21.4.13/src/vm-limit.c.ppc64	2004-01-21 14:35:11.000000000 +0100
+++ xemacs-21.4.13/src/vm-limit.c	2004-01-21 14:35:57.000000000 +0100
@@ -59,6 +59,14 @@
   unsigned long data_size;
   void (*save_warn_fun) (const char *);
 
+#ifdef __powerpc64__
+  /* powerpc64 has a different memory layout, which
+   * I would probably need to fake via a linker script.
+   * For now assume we cannot run out of memory.
+   */
+  return;
+#endif
+
   if (lim_data == 0)
     get_lim_data ();
   five_percent = lim_data / 20;
--- xemacs-21.4.13/configure.in.ppc64	2004-01-21 10:11:35.000000000 +0100
+++ xemacs-21.4.13/configure.in	2004-01-21 10:11:35.000000000 +0100
@@ -1104,7 +1104,8 @@
   romp-ibm-*       ) machine=ibmrt ;;
   rs6000-ibm-aix*  ) machine=ibmrs6000 ;;
   powerpc-ibm-aix* ) machine=ibmrs6000 ;;
-  powerpc*-*       ) machine=powerpc ;;
+  powerpc64-*      ) machine=powerpc64 ;;
+  powerpc-*        ) machine=powerpc ;;
   hppa-*-*         ) machine=hp800 ;;
   m88k-dg-*        ) machine=aviion ;;
   m68*-sony-*      ) machine=news ;;