+ifeq ($(LIBTOOL),)
+trace-dtrace.lo: trace-dtrace.dtrace
+ @echo "missing libtool. please install and rerun configure."; exit 1
+else
+trace-dtrace.lo: trace-dtrace.dtrace
+ $(call quiet-command,libtool --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN trace-dtrace.o")
+endif
+