m4(1) - f39

1M4(1)                            User Commands                           M4(1)
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NAME

6       m4 - macro processor
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SYNOPSIS

9       m4 [OPTION]... [FILE]...
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DESCRIPTION

12       Process  macros in FILEs.  If no FILE or if FILE is `-', standard input
13       is read.
14
15       Mandatory or optional arguments to long options are  mandatory  or  op‐
16       tional for short options too.
17
18   Operation modes:
19       --help display this help and exit
20
21       --version
22              output version information and exit
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24       -E, --fatal-warnings
25              once: warnings become errors, twice: stop execution at first er‐
26              ror
27
28       -i, --interactive
29              unbuffer output, ignore interrupts
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31       -P, --prefix-builtins
32              force a `m4_' prefix to all builtins
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34       -Q, --quiet, --silent
35              suppress some warnings for builtins
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37       --warn-macro-sequence[=REGEXP]
38              warn if macro definition matches REGEXP,
39
40              default \$\({[^}]*}\|[0-9][0-9]+\)
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42       -W, --word-regexp=REGEXP
43              use REGEXP for macro name syntax
44
45   Preprocessor features:
46       -D, --define=NAME[=VALUE]
47              define NAME as having VALUE, or empty
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49       -I, --include=DIRECTORY
50              append DIRECTORY to include path
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52       -s, --synclines
53              generate `#line NUM "FILE"' lines
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55       -U, --undefine=NAME
56              undefine NAME
57
58   Limits control:
59       -g, --gnu
60              override -G to re-enable GNU extensions
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62       -G, --traditional
63              suppress all GNU extensions
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65       -H, --hashsize=PRIME
66              set symbol lookup hash table size [509]
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68       -L, --nesting-limit=NUMBER
69              change nesting limit, 0 for unlimited [0]
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71   Frozen state files:
72       -F, --freeze-state=FILE
73              produce a frozen state on FILE at end
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75       -R, --reload-state=FILE
76              reload a frozen state from FILE at start
77
78   Debugging:
79       -d, --debug[=FLAGS]
80              set debug level (no FLAGS implies `aeq')
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82       --debugfile[=FILE]
83              redirect debug and trace output to FILE (default stderr, discard
84              if empty string)
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86       -l, --arglength=NUM
87              restrict macro tracing size
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89       -t, --trace=NAME
90              trace NAME when it is defined
91
92   FLAGS is any of:
93       a      show actual arguments
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95       c      show before collect, after collect and after call
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97       e      show expansion
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99       f      say current input file name
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101       i      show changes in input files
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103       l      say current input line number
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105       p      show results of path searches
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107       q      quote values as necessary, with a or e flag
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109       t      trace for all macro calls, not only traceon'ed
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111       x      add a unique macro call id, useful with c flag
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113       V      shorthand for all of the above flags
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115       If defined, the environment variable `M4PATH' is a colon-separated list
116       of directories included after any specified by `-I'.
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118       Exit status is 0 for success, 1 for failure, 63 for frozen file version
119       mismatch, or whatever value was passed to the m4exit macro.
120

AUTHOR

122       Written by Rene' Seindal.
123

REPORTING BUGS

125       Report bugs to: bug-m4@gnu.org
126       GNU M4 home page: <https://www.gnu.org/software/m4/>
127       General help using GNU software: <https://www.gnu.org/gethelp/>
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COPYRIGHT

130       Copyright  ©  2021  Free Software Foundation, Inc.  License GPLv3+: GNU
131       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
132       This is free software: you are free  to  change  and  redistribute  it.
133       There is NO WARRANTY, to the extent permitted by law.
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NAME

SYNOPSIS

DESCRIPTION

AUTHOR

REPORTING BUGS

COPYRIGHT

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