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Another such occasion is when you want to generate prerequisites from source files automatically; the prerequisites can be put in a file that is included by the main makefile. This practice is generally cleaner than that of somehow appending the prerequisites to the end of the main makefile as has been traditionally done with other versions of `make'. *Note Automatic Prerequisites::.
另一个场景时，当你想要从源文件自动地生成前提条件；前提条件可以放在一个文件里，这个文件再被include到 主 makefile中。此种实践通常会被那些靠连接 makefile文件尾部的前提条件的传统做法要更加清晰。
*Note Automatic Prerequisites::.
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