diff -dur xen-4.2.0.orig/tools/libfsimage/common/Makefile xen-4.2.0/tools/libfsimage/common/Makefile
--- xen-4.2.0.orig/tools/libfsimage/common/Makefile	2012-09-17 12:21:18.000000000 +0200
+++ xen-4.2.0/tools/libfsimage/common/Makefile	2012-10-23 09:20:47.000000000 +0200
@@ -5,7 +5,7 @@
 MINOR = 0
 
 LDFLAGS-$(CONFIG_SunOS) = -Wl,-M -Wl,mapfile-SunOS
-LDFLAGS-$(CONFIG_Linux) = -Wl,mapfile-GNU
+LDFLAGS-$(CONFIG_Linux) = -Wl,mapfile-GNU -ldl
 LDFLAGS += $(LDFLAGS-y)
 
 CFLAGS += $(PTHREAD_CFLAGS)