-# Files which are generated by perl scripts
-$(srcdir)/function.h $(srcdir)/function.cpp: $(srcdir)/function.pl
- cd $(srcdir) && perl -w function.pl
+BUILT_SOURCES = function.cpp function.h
+EXTRA_DIST += function.cpp function.h
+
+$(srcdir)/function.cpp: function.cppy function.py
+ $(PYTHON) $(srcdir)/function.py -o $@ $<
+
+$(srcdir)/function.h: function.hppy function.py
+ $(PYTHON) $(srcdir)/function.py -o $@ $<