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(autoconf.info)Programming in M4sugar

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Programming in M4sugar
======================

   M4 by itself provides only a small, but sufficient, set of
all-purpose macros.  M4sugar introduces additional generic macros.  Its
name was coined by Lars J. Aas: "Readability And Greater Understanding
Stands 4 M4sugar".

Redefined M4 Macros

M4 builtins changed in M4sugar

Evaluation Macros

More quotation and evaluation control

Forbidden Patterns

Catching unexpanded macros