This is m4.info, produced by makeinfo version 7.3 from m4.texi.

This manual (15 May 2026) is for GNU M4 (version 1.4.21), a package
containing an implementation of the m4 macro language.

   Copyright © 1989-1994, 2004-2014, 2016-2017, 2020-2026 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, no Front-Cover Texts, and
     no Back-Cover Texts.  A copy of the license is included in the
     section entitled "GNU Free Documentation License."
INFO-DIR-SECTION Text creation and manipulation
START-INFO-DIR-ENTRY
* M4: (m4).                     A powerful macro processor.
END-INFO-DIR-ENTRY


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m4.info-2: 317295

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(Indirect)
Node: Top828
Node: Preliminaries9770
Node: Intro10476
Node: History12167
Node: Bugs16220
Node: Manual17483
Node: Invoking m420986
Node: Operation modes23190
Node: Preprocessor features26289
Node: Limits control29459
Node: Frozen state33470
Node: Debugging options34309
Node: Command line files36361
Node: Syntax38012
Node: Names39167
Node: Quoted strings39649
Node: Comments40316
Node: Other tokens41219
Node: Input processing41813
Ref: Input processing-Footnote-150250
Node: Macros50447
Node: Invocation50941
Node: Inhibiting Invocation51742
Node: Macro Arguments55984
Node: Quoting Arguments59104
Node: Macro expansion61240
Node: Definitions61958
Node: Define62743
Node: Arguments65261
Node: Pseudo Arguments69027
Node: Undefine72656
Node: Defn73815
Node: Pushdef78878
Node: Indir81618
Node: Builtin83785
Node: Conditionals86060
Node: Ifdef87006
Node: Ifelse87888
Node: Shift91274
Node: Forloop102094
Node: Foreach104775
Node: Stacks110397
Node: Composition113532
Node: Debugging121209
Node: Dumpdef121802
Node: Trace123220
Node: Debug Levels126872
Node: Debug Output131742
Node: Input Control133055
Node: Dnl133596
Node: Changequote135538
Node: Changecom145270
Node: Changeword149156
Node: M4wrap154761
Node: File Inclusion158846
Node: Include159167
Node: Search Path161984
Node: Diversions162933
Node: Divert164640
Node: Undivert167206
Node: Divnum170591
Node: Cleardivert171064
Node: Text handling172285
Node: Len173012
Node: Index macro173406
Node: Regexp174299
Node: Substr177460
Node: Translit178518
Node: Patsubst181309
Node: Format185950
Node: Arithmetic189358
Node: Incr189811
Node: Eval191486
Node: Shell commands200230
Node: Platform macros201168
Node: Syscmd203370
Node: Esyscmd205745
Node: Sysval207328
Node: Mkstemp209295
Node: Miscellaneous213352
Node: Errprint213789
Node: Location215041
Node: M4exit217918
Node: Frozen files220044
Node: Using frozen files220842
Node: Frozen file format224223
Node: Compatibility227373
Node: Extensions228455
Node: Incompatibilities232509
Node: Other Incompatibilities241813
Node: Answers244543
Node: Improved exch245357
Node: Improved forloop245910
Node: Improved foreach251366
Node: Improved copy264744
Node: Improved m4wrap268801
Node: Improved cleardivert271297
Node: Improved capitalize272295
Node: Improved fatal_error277331
Node: Copying This Package278428
Node: GNU General Public License278907
Node: Copying This Manual317295
Node: GNU Free Documentation License317819
Node: Indices342943
Node: Macro index343227
Node: Concept index349837

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