diff -Naur a/tools/qemu-xen-traditional/Makefile.target b/tools/qemu-xen-traditional/Makefile.target
--- a/tools/qemu-xen-traditional/Makefile.target	2012-04-24 19:35:40.000000000 +0200
+++ b/tools/qemu-xen-traditional/Makefile.target	2012-08-23 09:41:05.124447549 +0200
@@ -250,6 +250,7 @@
 endif
 
 LIBS+=-lz
+LIBS+=-lrt
 ifdef CONFIG_ALSA
 LIBS += -lasound
 endif