define autoconf-it
autoconf $(ACFLAGS) $< > $@.new
mv -f $@.new $@
-test -d CVS && cvs commit -m'Regenerated: autoconf $(ACFLAGS) $<' $@
+test ! -d CVS || cvs commit -m'Regenerated: autoconf $(ACFLAGS) $<' $@
endef
configure: configure.in; $(autoconf-it)