B.1 Index for many concepts

• arguments to macros: Macro Arguments
• Arguments to macros: Arguments
• arguments to macros, special: Pseudo Arguments
• arguments, quoted macro: Quoting Arguments
• arithmetic: Arithmetic
• arrays: Define
• builtins, indirect call of: Builtin
• call of builtins, indirect: Builtin
• call of macros, indirect: Indir
• changing comment delimiters: Changecom
• changing the quote delimiters: Changequote
• characters, translating: Translit
• command line, file names on the: Invoking m4
• command line, macro definitions on the: Invoking m4
• command line, options: Invoking m4
• commands, exit status from shell: Sysval
• commands, running shell: Shell commands
• commands, running UNIX: Shell commands
• comment delimiters, changing: Changecom
• comments: Comments
• comments, copied to output: Changecom
• comparing strings: Ifelse
• compatibility: Compatibility
• conditionals: Ifdef
• controlling debugging output: Debug Levels
• counting loops: Loops
• debugging output, controlling: Debug Levels
• debugging output, saving: Debug Output
• decrement operator: Incr
• defining new macros: Definitions
• definitions, displaying macro: Dumpdef
• deleting macros: Undefine
• deleting whitespace in input: Dnl
• discarding diverted text: Cleardiv
• displaying macro definitions: Dumpdef
• diversion numbers: Divnum
• diverted text, discarding: Cleardiv
• diverting output to files: Divert
• dumping into frozen file: Using frozen files
• error messages, printing: Errprint
• evaluation, of integer expressions: Eval
• executing shell commands: Shell commands
• executing UNIX commands: Shell commands
• exit status from shell commands: Sysval
• exiting from m4: M4exit
• expansion of macros: Macro expansion
• expansion, tracing macro: Trace
• expressions, evaluation of integer: Eval
• extracting substrings: Substr
• fast loading of frozen files: Using frozen files
• FDL, GNU Free Documentation License: GNU Free Documentation License
• file format, frozen file: Frozen file format
• file inclusion: Undivert
• file inclusion: File Inclusion
• file names, on the command line: Invoking m4
• files, diverting output to: Divert
• files, names of temporary: Maketemp
• for loops: Loops
• formatted output: Format
• frozen file format: Frozen file format
• frozen files for fast loading: Using frozen files
• GNU extensions: Builtin
• GNU extensions: Undivert
• GNU extensions: Extensions
• GNU extensions: Patsubst
• GNU extensions: Search Path
• GNU extensions: Esyscmd
• GNU extensions: Using frozen files
• GNU extensions: Debug Output
• GNU extensions: Regexp
• GNU extensions: Arguments
• GNU extensions: Format
• GNU extensions: Indir
• GNU extensions: Define
• GNU extensions: Debug Levels
• included files, search path for: Search Path
• inclusion, of files: Undivert
• inclusion, of files: File Inclusion
• increment operator: Incr
• indirect call of builtins: Builtin
• indirect call of macros: Indir
• initialization, frozen states: Using frozen files
• input tokens: Syntax
• input, saving: M4wrap
• integer arithmetic: Arithmetic
• integer expression evaluation: Eval
• length of strings: Len
• lexical structure of words: Changeword
• License: Copying This Manual
• local variables: Pushdef
• loops: Loops
• loops, counting: Loops
• macro definitions, on the command line: Invoking m4
• macro expansion, tracing: Trace
• macro invocation: Invocation
• macros, arguments to: Arguments
• macros, arguments to: Macro Arguments
• macros, displaying definitions: Dumpdef
• macros, expansion of: Macro expansion
• macros, how to define new: Definitions
• macros, how to delete: Undefine
• macros, how to rename: Defn
• macros, indirect call of: Indir
• macros, quoted arguments to: Quoting Arguments
• macros, recursive: Loops
• macros, special arguments to: Pseudo Arguments
• macros, temporary redefinition of: Pushdef
• messages, printing error: Errprint
• multibranches: Ifelse
• names: Names
• options, command line: Invoking m4
• output, diverting to files: Divert
• output, formatted: Format
• output, saving debugging: Debug Output
• pattern substitution: Patsubst
• platform macro: Platform macros
• platform macros: Platform macros
• POSIXLY_CORRECT: Invoking m4
• printing error messages: Errprint
• quote delimiters, changing the: Changequote
• quoted macro arguments: Quoting Arguments
• quoted string: Quoted strings
• recursive macros: Loops
• redefinition of macros, temporary: Pushdef
• regular expressions: Regexp
• regular expressions: Patsubst
• reloading a frozen file: Using frozen files
• renaming macros: Defn
• running shell commands: Shell commands
• running UNIX commands: Shell commands
• saving debugging output: Debug Output
• saving input: M4wrap
• search path for included files: Search Path
• shell commands, exit status from: Sysval
• shell commands, running: Shell commands
• special arguments to macros: Pseudo Arguments
• status of shell commands: Sysval
• status, setting m4 exit: M4exit
• strings, length of: Len
• substitution by regular expression: Patsubst
• substrings, extracting: Substr
• temporary file names: Maketemp
• temporary redefinition of macros: Pushdef
• tokens: Syntax
• tracing macro expansion: Trace
• translating characters: Translit
• undefining macros: Undefine
• UNIX commands, exit status from: Sysval
• UNIX commands, running: Shell commands
• variables, local: Pushdef
• words, lexical structure of: Changeword