From dd0e14964f0654127a925e9ce0a6b2ca833991d7 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Sun, 21 Jul 2013 19:48:12 +0200
Subject: [PATCH] Support building a cross gcc2 on x86_64

At least building the compiler seems to work on Linux (openSUSE 12.3).
Haven't tested whether the resulting Haiku works as well.
---
 legacy/gcc/gcc/config/i386/xm-x86_64.h | 43 ++++++++++++++++++++++++++
 legacy/gcc/gcc/configure               |  8 +++++
 legacy/gcc/gcc/configure.in            |  8 +++++
 3 files changed, 59 insertions(+)
 create mode 100644 legacy/gcc/gcc/config/i386/xm-x86_64.h

diff --git a/legacy/gcc/gcc/config/i386/xm-x86_64.h b/legacy/gcc/gcc/config/i386/xm-x86_64.h
new file mode 100644
index 0000000000..ba7b1076c0
--- /dev/null
+++ b/legacy/gcc/gcc/config/i386/xm-x86_64.h
@@ -0,0 +1,43 @@
+/* Configuration for GNU C-compiler for Intel 80386.
+   Copyright (C) 1988, 1993 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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 CC 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 CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifndef i386
+#define i386
+#endif
+
+/* #defines that need visibility everywhere.  */
+#define FALSE 0
+#define TRUE 1
+
+/* This describes the machine the compiler is hosted on.  */
+#define HOST_BITS_PER_CHAR 8
+#define HOST_BITS_PER_SHORT 16
+#define HOST_BITS_PER_INT 32
+#define HOST_BITS_PER_LONG 64
+#define HOST_BITS_PER_LONGLONG 64
+
+/* Arguments to use with `exit'.  */
+#define SUCCESS_EXIT_CODE 0
+#define FATAL_EXIT_CODE 33
+
+/* target machine dependencies.
+   tm.h is a symbolic link to the actual target specific file.   */
+
+#include "tm.h"
diff --git a/legacy/gcc/gcc/configure b/legacy/gcc/gcc/configure
index ed9f03f0c4..e9f908500c 100755
--- a/legacy/gcc/gcc/configure
+++ b/legacy/gcc/gcc/configure
@@ -2947,6 +2947,9 @@ for machine in $build $host $target; do
 	sparc*-*-*)
 		cpu_type=sparc
 		;;
+	x86_64-*)
+		cpu_type=x86_64
+		;;
 	esac
 
 	tm_file=${cpu_type}/${cpu_type}.h
@@ -5637,6 +5640,11 @@ for machine in $build $host $target; do
 		xm_file="${xm_file} xm-svr3"
 		use_collect2=yes
 		;;
+	x86_64-*)
+		# Not actually supported as a target. But we want to avoid an error when
+		# building a cross-compiler for this build host.
+		xm_file=i386/xm-x86_64.h
+		;;
 	*)
 		echo "Configuration $machine not supported" 1>&2
 		exit 1
diff --git a/legacy/gcc/gcc/configure.in b/legacy/gcc/gcc/configure.in
index 1e47a03979..e310a339bf 100644
--- a/legacy/gcc/gcc/configure.in
+++ b/legacy/gcc/gcc/configure.in
@@ -513,6 +513,9 @@ changequote([,])dnl
 	sparc*-*-*)
 		cpu_type=sparc
 		;;
+	x86_64-*)
+		cpu_type=x86_64
+		;;
 	esac
 
 	tm_file=${cpu_type}/${cpu_type}.h
@@ -3341,6 +3344,11 @@ changequote([,])dnl
 		xm_file="${xm_file} xm-svr3"
 		use_collect2=yes
 		;;
+	x86_64-*)
+		# Not actually supported as a target. But we want to avoid an error when
+		# building a cross-compiler for this build host.
+		xm_file=i386/xm-x86_64.h
+		;;
 	*)
 		echo "Configuration $machine not supported" 1>&2
 		exit 1