--- xen-unstable.orig/tools/libxc/Makefile	2005-03-18 22:33:27.000000000 -0600
+++ xen-unstable/tools/libxc/Makefile	2005-03-19 23:42:05.859180752 -0600
@@ -22,16 +22,22 @@ SRCS     += xc_domain.c
 SRCS     += xc_evtchn.c
 SRCS     += xc_gnttab.c
 SRCS     += xc_io.c
-SRCS     += xc_linux_build.c
-SRCS     += xc_plan9_build.c
 SRCS     += xc_linux_restore.c
 SRCS     += xc_linux_save.c
 SRCS     += xc_misc.c
 SRCS     += xc_physdev.c
 SRCS     += xc_private.c
-SRCS     += xc_ptrace.c
 SRCS     += xc_rrobin.c
+ifeq ($(XEN_TARGET_ARCH),x86_32)
+SRC 	  += xc_linux_build.c
+SRCS     += xc_plan9_build.c
 SRCS     += xc_vmx_build.c
+SRCS     += xc_ptrace.c
+endif
+ifeq ($(XEN_TARGET_ARCH),x86_64)
+SRCS	  += xc_linux_build_x64.c
+endif
+
 
 CFLAGS   += -Wall
 CFLAGS   += -Werror