README - m4 - Git at Google

 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 Rene' Seindal, from Denmark.

 GNU `m4' has a web site at http://www.gnu.org/software/m4/.

 If GNU `m4' is meant to serve GNU `autoconf', beware that `m4'
 should be fully installed *prior to* configuring `autoconf' itself.
 Likewise, if you intend on hacking GNU `m4' from git, the bootstrap
 process requires that you first install a released copy of GNU `m4'.

 If you are just trying to build `m4' from a released tarball, you
 should not normally need to run `./bootstrap' or `autoreconf'; just go
 ahead and start with `./configure'.  If you are trying to build `m4'
 from git, more information can be found in the version-control-only
 file HACKING.

 In the subdirectories `tests' and `doc/examples' you will find various
 m4 files, ranging from trivial test files to rather advanced macros.  If
 you intend to use m4 seriously, you might find useful material down
 there.

 See file `COPYING' for copying conditions.  Note that M4 is distributed
 under the GNU Public License version 3 or later.  Some files in the
 distribution are copied from the gnulib project, and hence bear the
 designation version 2 or later because they are unmodified from gnulib;
 however, if you modify these files using M4 rather than gnulib as the
 source, you must update the license to be GPLv3 or later.
 See file `INSTALL' for compilation and installation instructions.
 See file `ABOUT-NLS' for how to customize this program to your language.
 See file `NEWS' for a list of major changes in the current release.
 See file `AUTHORS' for the names of maintainers.
 See file `THANKS' for a list of contributors.

 By using `./configure --with-gmp, you get multiple precision integral
 and rational arithmetic using mpeval.  The implementation depends on the
 GNU gmp v2 library.

 By using `./configure --with-modules=`foo bar baz', you get an m4 with only
 the named modules preloaded.  The default modules (preloaded if you do not
 use this option) are sufficient to do the job of GNU m4-1.4.  Additional
 modules may be desirable, or necessary if libltdl does not support your
 host architecture.  The implementation uses libltdl interface, details of
 which are in the libtool manual.  See file `modules/README' for a more
 detailed description.

 By default, the `syscmd' and `esyscmd' macros try to use the first
 instance of `sh' found by `command -p getconf PATH' at configure time,
 with a default of `/bin/sh'.  If that default is inappropriate, you
 can use `./configure --with-syscmd-shell=location' to specify the
 shell to use.

 By using `./configure --with-dmalloc', GNU m4 is linked with Gray
 Watson's dmalloc package.  It is a debugging option for finding memory
 management problems.  Gray Watson's dmalloc package is available at
 ftp://ftp.letters.com/src/dmalloc/dmalloc.tar.gz.

 GNU M4 uses GNU Libtool in order to build shared libraries on a
 variety of systems.  While this is very nice for making usable
 binaries, it can be a pain when trying to debug a program. For that
 reason, compilation of shared libraries can be turned off by
 specifying the `--disable-shared' option to `configure'.  However,
 without shared libraries, modules that are not preloaded will not be
 available for use.

 Send bug reports, comments or ideas to `bug-m4@gnu.org'.  A bug report
 is an adequate description of the problem: your input, what you
 expected, what you got, and why this is wrong.  Diffs are welcome, but
 they only describe a solution, from which the problem might be uneasy to
 infer.  Don't forget all relevant information about your operating
 system, compiler, libraries, ...

 The easiest way to remember this information is by using the
 testsuite.  Any test failures are automatically logged, along with
 lots of useful information about your setup; simply mailing
 tests/testsuite.log to `bug-m4@gnu.org' is a good start.  If you want
 to dive in and debug a failure, you may find it useful to fine-tune
 the execution of the testsuite.  For example, running test 12 in
 verbose mode can be done with:

 make check TESTSUITEFLAGS='-v -d -x 12'

 The testsuite understands --help to tell you more about the current
 set of tests.

 For any copyright year range specified as YYYY-ZZZZ in this package
 note that the range specifies every single year in that closed interval.

 ========================================================================

 Copyright (C) 2000, 2005-2011, 2013-2014, 2017 Free Software Foundation,
 Inc.

 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3 or
 any later version published by the Free Software Foundation; with no
 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
 Texts.  A copy of the license is included in the ``GNU Free
 Documentation License'' file as part of this distribution.
	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 Rene' Seindal, from Denmark.

	GNU `m4' has a web site at http://www.gnu.org/software/m4/.

	If GNU `m4' is meant to serve GNU `autoconf', beware that `m4'
	should be fully installed prior to configuring `autoconf' itself.
	Likewise, if you intend on hacking GNU `m4' from git, the bootstrap
	process requires that you first install a released copy of GNU `m4'.

	If you are just trying to build `m4' from a released tarball, you
	should not normally need to run `./bootstrap' or `autoreconf'; just go
	ahead and start with `./configure'. If you are trying to build `m4'
	from git, more information can be found in the version-control-only
	file HACKING.

	In the subdirectories `tests' and `doc/examples' you will find various
	m4 files, ranging from trivial test files to rather advanced macros. If
	you intend to use m4 seriously, you might find useful material down
	there.

	See file `COPYING' for copying conditions. Note that M4 is distributed
	under the GNU Public License version 3 or later. Some files in the
	distribution are copied from the gnulib project, and hence bear the
	designation version 2 or later because they are unmodified from gnulib;
	however, if you modify these files using M4 rather than gnulib as the
	source, you must update the license to be GPLv3 or later.
	See file `INSTALL' for compilation and installation instructions.
	See file `ABOUT-NLS' for how to customize this program to your language.
	See file `NEWS' for a list of major changes in the current release.
	See file `AUTHORS' for the names of maintainers.
	See file `THANKS' for a list of contributors.

	By using `./configure --with-gmp, you get multiple precision integral
	and rational arithmetic using mpeval. The implementation depends on the
	GNU gmp v2 library.

	By using `./configure --with-modules=`foo bar baz', you get an m4 with only
	the named modules preloaded. The default modules (preloaded if you do not
	use this option) are sufficient to do the job of GNU m4-1.4. Additional
	modules may be desirable, or necessary if libltdl does not support your
	host architecture. The implementation uses libltdl interface, details of
	which are in the libtool manual. See file `modules/README' for a more
	detailed description.

	By default, the `syscmd' and `esyscmd' macros try to use the first
	instance of `sh' found by `command -p getconf PATH' at configure time,
	with a default of `/bin/sh'. If that default is inappropriate, you
	can use `./configure --with-syscmd-shell=location' to specify the
	shell to use.

	By using `./configure --with-dmalloc', GNU m4 is linked with Gray
	Watson's dmalloc package. It is a debugging option for finding memory
	management problems. Gray Watson's dmalloc package is available at
	ftp://ftp.letters.com/src/dmalloc/dmalloc.tar.gz.

	GNU M4 uses GNU Libtool in order to build shared libraries on a
	variety of systems. While this is very nice for making usable
	binaries, it can be a pain when trying to debug a program. For that
	reason, compilation of shared libraries can be turned off by
	specifying the `--disable-shared' option to `configure'. However,
	without shared libraries, modules that are not preloaded will not be
	available for use.

	Send bug reports, comments or ideas to `bug-m4@gnu.org'. A bug report
	is an adequate description of the problem: your input, what you
	expected, what you got, and why this is wrong. Diffs are welcome, but
	they only describe a solution, from which the problem might be uneasy to
	infer. Don't forget all relevant information about your operating
	system, compiler, libraries, ...

	The easiest way to remember this information is by using the
	testsuite. Any test failures are automatically logged, along with
	lots of useful information about your setup; simply mailing
	tests/testsuite.log to `bug-m4@gnu.org' is a good start. If you want
	to dive in and debug a failure, you may find it useful to fine-tune
	the execution of the testsuite. For example, running test 12 in
	verbose mode can be done with:

	make check TESTSUITEFLAGS='-v -d -x 12'

	The testsuite understands --help to tell you more about the current
	set of tests.

	For any copyright year range specified as YYYY-ZZZZ in this package
	note that the range specifies every single year in that closed interval.

	========================================================================

	Copyright (C) 2000, 2005-2011, 2013-2014, 2017 Free Software Foundation,
	Inc.

	Permission is granted to copy, distribute and/or modify this document
	under the terms of the GNU Free Documentation License, Version 1.3 or
	any later version published by the Free Software Foundation; with no
	Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
	Texts. A copy of the license is included in the ``GNU Free
	Documentation License'' file as part of this distribution.