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This file documents GNU M4 1.4.4.
Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 2004, 2005 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.
Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.
Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions, except that this permission notice may be stated in a translation approved by the Foundation.
GNU m4
is an implementation of the traditional UNIX macro
processor. It is mostly SVR4 compatible, although it has some
extensions (for example, handling more than 9 positional parameters
to macros). m4
also has builtin functions for including
files, running shell commands, doing arithmetic, etc. Autoconf needs
GNU m4
for generating `configure' scripts, but not for
running them.
GNU m4
was originally written by René Seindal, with
subsequent changes by No value for Francois Pinard and other volunteers
on the Internet. All names and email addresses can be found in the
file `THANKS' from the GNU m4
distribution.
This is release 1.4.4. It is now to be considered stable, future releases are only meant to fix bugs, increase speed, or improve documentation. However…
An experimental feature, which would improve m4
usefulness,
allows for changing the syntax for what is a word in m4
.
You should use:
./configure --enable-changeword |
if you want this feature compiled in. The current implementation
slows down m4
considerably and is hardly acceptable. So, it
might go away, do not count on it yet.
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