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6.14.2. Contents of M4
Installed program: m4
Short Descriptions
m4 Copies the given files while expanding the macros that they contain [These macros are either built-in or user- defined and can take any number of arguments. Besides performing macro expansion, m4 has built-in functions for including named files, running Unix commands, performing integer arithmetic, manipulating text, recursion, etc. The m4 program can be used either as a front-end to a compiler or as a macro processor in its own right.]