--- /dev/null
+--- emacs-21.2/configure.in~ 2002-11-05 18:26:11.000000000 +0900
++++ emacs-21.2/configure.in 2002-11-05 18:26:11.000000000 +0900
+@@ -1052,6 +1055,11 @@
+ machine=f301 opsys=uxpv
+ ;;
+
++ ## AMD x86-64 Linux-based GNU system
++ x86_64-*-linux-gnu* )
++ machine=amdx86-64 opsys=gnu-linux
++ ;;
++
+ * )
+ unported=yes
+ ;;
+--- /dev/null 2002-11-06 15:24:04.000000000 +0900
++++ emacs-21.2/src/m/amdx86-64.h 2002-11-06 15:24:04.000000000 +0900
+@@ -0,0 +1,131 @@
++/* machine description file for AMD x86-64.
++ Copyright (C) 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 2, 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. */
++
++
++/* The following line tells the configuration script what sort of
++ operating system this machine is likely to run.
++ USUAL-OPSYS="linux" */
++
++#define BITS_PER_LONG 64
++#define BITS_PER_EMACS_INT 64
++
++/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
++ is the most significant byte. */
++
++#undef WORDS_BIG_ENDIAN
++
++/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
++ * group of arguments and treat it as an array of the arguments. */
++
++#define NO_ARG_ARRAY
++
++/* Define WORD_MACHINE if addresses and such have
++ * to be corrected before they can be used as byte counts. */
++
++/* #define WORD_MACHINE */
++
++/* 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 */
++/* __x86_64 defined automatically. */
++
++/* Use type 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
++
++/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
++ the 24-bit bit field into an int. In other words, if bit fields
++ are always unsigned.
++
++ If you use NO_UNION_TYPE, this flag does not matter. */
++
++#define EXPLICIT_SIGN_EXTEND
++
++/* 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 CANNOT_DUMP on machines where unexec does not work.
++ Then the function dump-emacs will not be defined
++ and temacs will do (load "loadup") automatically unless told otherwise. */
++
++/* #define CANNOT_DUMP */
++
++/* Define VIRT_ADDR_VARIES if the virtual addresses of
++ pure and impure space as loaded can vary, and even their
++ relative order cannot be relied on.
++
++ Otherwise Emacs assumes that text space precedes data space,
++ numerically. */
++
++/* #define VIRT_ADDR_VARIES */
++
++/* 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 C_ALLOCA
++#define HAVE_ALLOCA
++
++/* Define NO_REMAP if memory segmentation makes it not work well
++ to change the boundary between the text section and data section
++ when Emacs is dumped. If you define this, the preloaded Lisp
++ code will not be sharable; but that's better than failing completely. */
++
++/* #define NO_REMAP */
++
++#define PNTR_COMPARISON_TYPE unsigned long
++
++/* On the 64 bit architecture, we can use 60 bits for addresses */
++
++#define VALBITS 60
++
++/* This definition of MARKBIT is necessary because of the comparison of
++ ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
++
++#define MARKBIT 0x8000000000000000L
++
++/* Define XINT and XUINT so that they can take arguments of type int */
++#define XINT(a) (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
++#define XUINT(a) ((long) (a) & VALMASK)
++
++/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
++
++#define XPNTR(a) XUINT (a)
++
++#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
+--- emacs-21.3/configure.orig 2003-03-18 15:19:12.000000000 +0100
++++ emacs-21.3/configure 2004-07-24 01:21:59.740692929 +0200
+@@ -1686,6 +1686,11 @@
+ machine=f301 opsys=uxpv
+ ;;
+
++ ## AMD x86-64 Linux-based GNU system
++ x86_64-*-linux-gnu* )
++ machine=amdx86-64 opsys=gnu-linux
++ ;;
++
+ * )
+ unported=yes
+ ;;