build system: Add 64bit variant

Only Xen platform for now.

* Makefrag.am [HOST_x86_64]: Include x86_64/Makefrag.am.
* configure.ac: Include x86_64/configfrag.ac.
[default:x86_64] (host_platform): Set platform to xen.
* x86_64/Makefrag.am, x86_64/configfrag.ac: New files.

1 files changed, 48 insertions, 0 deletions

diff --git a/x86_64/configfrag.ac b/x86_64/configfrag.ac
new file mode 100644
index 00000000..99db468f
--- /dev/null
+++ b/x86_64/configfrag.ac
@@ -0,0 +1,48 @@
+dnl Configure fragment for x86_64.
+
+dnl Copyright (C) 1999, 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
+
+dnl Permission to use, copy, modify and distribute this software and its
+dnl documentation is hereby granted, provided that both the copyright
+dnl notice and this permission notice appear in all copies of the
+dnl software, derivative works or modified versions, and any portions
+dnl thereof, and that both notices appear in supporting documentation.
+dnl
+dnl THE FREE SOFTWARE FOUNDATION ALLOWS FREE USE OF THIS SOFTWARE IN ITS
+dnl "AS IS" CONDITION.  THE FREE SOFTWARE FOUNDATION DISCLAIMS ANY
+dnl LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
+dnl USE OF THIS SOFTWARE.
+
+#
+# Definitions.
+#
+
+[case $host_cpu in
+  x86_64)]
+    AM_CONDITIONAL([HOST_x86_64], [true])
+
+    # Some of the x86_64-specific code checks for these.
+    AC_DEFINE([__ELF__], [1], [__ELF__])
+
+    # Determines the size of the CPU cache line.
+    AC_DEFINE([CPU_L1_SHIFT], [6], [CPU_L1_SHIFT])
+
+    [# Does the architecture provide machine-specific interfaces?
+    mach_machine_routines=1;;
+  *)]
+    AM_CONDITIONAL([HOST_x86_64], [false])[;;
+esac
+
+case $host_platform in
+  at)]
+    AM_CONDITIONAL([PLATFORM_at], [true])[;;
+  *)]
+    AM_CONDITIONAL([PLATFORM_at], [false])[;;
+esac]
+
+AC_DEFINE([PAE], [1], [PAE support])
+AM_CONDITIONAL([enable_pae], [true])
+
+dnl Local Variables:
+dnl mode: autoconf
+dnl End: