--- /dev/null
+%.c: %.cpkg $(top_builddir)/tools/cpkg2c
+ $(top_builddir)/tools/cpkg2c -c $< > $@ || (rm -f $@; exit 1)
+
+%.li: %.cpkg $(top_builddir)/tools/cpkg2c
+ $(top_builddir)/tools/cpkg2c -h $< > $@ || (rm -f $@; exit 1)
+
+$(top_builddir)/tools/cpkg2c:
+ $(MAKE) -C $(@D) $(@F)
+