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m4

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M4 (an acronym for Macro - M and 4 more letters) is a general-purpose macro language processor.

History

The predecessor macro processor m3 was written by Dennis Ritchie for the AP-3 minicomputer.

M4 was originally written by Brian Kernighan and Dennis Ritchie in 1977.

Implementations

  • The Heirloom Development Tools [1]
  • GNU M4 - used by GNU Autoconf
  • BSD m4

Links