-threadSafe.cmo: threadSafe.cmi
-threadSafe.cmx: threadSafe.cmi
-extThread.cmo: extThread.cmi
-extThread.cmx: extThread.cmi
+threadSafe.cmi :
+extThread.cmi :
+threadSafe.cmo : threadSafe.cmi
+threadSafe.cmx : threadSafe.cmi
+extThread.cmo : extThread.cmi
+extThread.cmx : extThread.cmi