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Linux Magazine: The Unknown Power Tool: m4, Part Two

By Jerry Peek

“Last month’s column presented some basics of the m4 macro
processor. m4 scans input text for defined symbols–macros– and
replaces those symbols with other text and possibly with other
symbols. For example, m4 can convert one language into another.

“This month, let’s dig deeper into m4 and look at included
files, diversions, frozen files, and debugging and tracing…”

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