This is m4.info, produced by makeinfo version 7.2 from m4.texi.

This manual (6 February 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: 317307

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(Indirect)
Node: Top832
Node: Preliminaries9778
Node: Intro10484
Node: History12175
Node: Bugs16228
Node: Manual17491
Node: Invoking m420994
Node: Operation modes23198
Node: Preprocessor features26297
Node: Limits control29467
Node: Frozen state33478
Node: Debugging options34317
Node: Command line files36369
Node: Syntax38020
Node: Names39175
Node: Quoted strings39657
Node: Comments40324
Node: Other tokens41227
Node: Input processing41821
Ref: Input processing-Footnote-150258
Node: Macros50455
Node: Invocation50949
Node: Inhibiting Invocation51750
Node: Macro Arguments55992
Node: Quoting Arguments59112
Node: Macro expansion61248
Node: Definitions61966
Node: Define62751
Node: Arguments65269
Node: Pseudo Arguments69035
Node: Undefine72664
Node: Defn73823
Node: Pushdef78886
Node: Indir81626
Node: Builtin83793
Node: Conditionals86068
Node: Ifdef87014
Node: Ifelse87896
Node: Shift91282
Node: Forloop102102
Node: Foreach104783
Node: Stacks110405
Node: Composition113540
Node: Debugging121217
Node: Dumpdef121810
Node: Trace123228
Node: Debug Levels126880
Node: Debug Output131750
Node: Input Control133063
Node: Dnl133604
Node: Changequote135546
Node: Changecom145278
Node: Changeword149164
Node: M4wrap154769
Node: File Inclusion158854
Node: Include159175
Node: Search Path161992
Node: Diversions162941
Node: Divert164648
Node: Undivert167214
Node: Divnum170599
Node: Cleardivert171072
Node: Text handling172293
Node: Len173020
Node: Index macro173414
Node: Regexp174307
Node: Substr177468
Node: Translit178526
Node: Patsubst181317
Node: Format185958
Node: Arithmetic189366
Node: Incr189819
Node: Eval191494
Node: Shell commands200238
Node: Platform macros201176
Node: Syscmd203378
Node: Esyscmd205753
Node: Sysval207336
Node: Mkstemp209303
Node: Miscellaneous213360
Node: Errprint213797
Node: Location215049
Node: M4exit217926
Node: Frozen files220052
Node: Using frozen files220850
Node: Frozen file format224231
Node: Compatibility227381
Node: Extensions228463
Node: Incompatibilities232517
Node: Other Incompatibilities241821
Node: Answers244551
Node: Improved exch245365
Node: Improved forloop245918
Node: Improved foreach251374
Node: Improved copy264752
Node: Improved m4wrap268809
Node: Improved cleardivert271305
Node: Improved capitalize272303
Node: Improved fatal_error277339
Node: Copying This Package278436
Node: GNU General Public License278915
Node: Copying This Manual317307
Node: GNU Free Documentation License317831
Node: Indices342955
Node: Macro index343239
Node: Concept index349849

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