Description

GNU M4 is a general-purpose macro processor that is designed to work with text files. It is most commonly used as a front-end to the GNU C Compiler, but can also be used as a stand-alone tool. The M4 macro processor is used to pre-process text files, allowing for the creation of powerful macros that can make text-processing operations simpler and more efficient. It can also be used to define and expand variables, as well as to perform various text-processing operations such as sorting, merging, and searching. M4 is an essential tool for any programmer or system administrator who needs to automate text-processing operations.

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