$(srcdir)/sp_config_scanner.c: $(srcdir)/sp_config_scanner.re
	if re2c -v |grep ' 2\.' 2>/dev/null; then \
		re2c -bc -o $@ $<; \
		re2c --no-generation-date --no-version -bci -o $(srcdir)/sp_config_scanner.cached.c $<; \
	else \
		cp $(srcdir)/sp_config_scanner.cached.c $@; \
	fi;