Since these binaries are going to be setuid root, we want 
don't want to allow lazy bindings, otherwise we allow some 
information leakage.

http://bugs.gentoo.org/77526

--- Makefile
+++ Makefile
@@ -39,3 +39,7 @@
 ping: ping.o ping_common.o
+	$(LINK.o) $^ $(LDLIBS) -o $@ -Wl,-z,now -Wl,-z,relro
 ping6: ping6.o ping_common.o
+	$(LINK.o) $^ $(LDLIBS) -o $@ -Wl,-z,now -Wl,-z,relro
+traceroute6: traceroute6.o
+	$(LINK.o) $^ $(LDLIBS) -o $@ -Wl,-z,now -Wl,-z,relro
 ping.o ping6.o ping_common.o: ping_common.h