如果带静态(或全局)变量的迭代器类或函数取决于多个数据状态，则出现两个问题。
If an iterator class or a function with static (or global) variables depends on multiple data states, two problems come up.
要数据编组的对象必须是类的一个实例，该类是用绑定中的全局映射定义的。
The object to be marshalled must be an instance of a class that's defined with a global mapping in the binding.
当安装或者卸载一个RPM改变了全局类映射数据库时，我们将使用该程序，并且该程序应该运行在R PM的% post和% postun部分。
This program is used when installing or uninstalling an RPM to update the global class mapping database, and should be run in your RPM's % post and % postun sections.
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