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M4(1)				 User Commands				 M4(1)

NAME
       m4 - macro processor

SYNOPSIS
       m4 [OPTION]... [FILE]...

DESCRIPTION
       Process	macros in FILEs.  If no FILE or if FILE is `-', standard input
       is read.

       Mandatory or optional  arguments	 to  long  options  are	 mandatory  or
       optional for short options too.

   Operation modes:
       --help display this help and exit

       --version
	      output version information and exit

       -E, --fatal-warnings
	      once:  warnings  become  errors,	twice: stop execution at first
	      error

       -i, --interactive
	      unbuffer output, ignore interrupts

       -P, --prefix-builtins
	      force a `m4_' prefix to all builtins

       -Q, --quiet, --silent
	      suppress some warnings for builtins

       --warn-macro-sequence[=REGEXP]
	      warn if macro definition matches REGEXP,

	      default \$\({[^}]*}\|[0-9][0-9]+\)

   Preprocessor features:
       -D, --define=NAME[=VALUE]
	      define NAME as having VALUE, or empty

       -I, --include=DIRECTORY
	      append DIRECTORY to include path

       -s, --synclines
	      generate `#line NUM "FILE"' lines

       -U, --undefine=NAME
	      undefine NAME

   Limits control:
       -g, --gnu
	      override -G to re-enable GNU extensions

       -G, --traditional
	      suppress all GNU extensions

       -H, --hashsize=PRIME
	      set symbol lookup hash table size [509]

       -L, --nesting-limit=NUMBER
	      change nesting limit, 0 for unlimited [0]

   Frozen state files:
       -F, --freeze-state=FILE
	      produce a frozen state on FILE at end

       -R, --reload-state=FILE
	      reload a frozen state from FILE at start

   Debugging:
       -d, --debug[=FLAGS]
	      set debug level (no FLAGS implies `aeq')

       --debugfile[=FILE]
	      redirect debug and trace output to FILE (default stderr, discard
	      if empty string)

       -l, --arglength=NUM
	      restrict macro tracing size

       -t, --trace=NAME
	      trace NAME when it is defined

   FLAGS is any of:
       a      show actual arguments

       c      show before collect, after collect and after call

       e      show expansion

       f      say current input file name

       i      show changes in input files

       l      say current input line number

       p      show results of path searches

       q      quote values as necessary, with a or e flag

       t      trace for all macro calls, not only traceon'ed

       x      add a unique macro call id, useful with c flag

       V      shorthand for all of the above flags

       If defined, the environment variable `M4PATH' is a colon-separated list
       of directories included after any specified by `-I'.

       Exit status is 0 for success, 1 for failure, 63 for frozen file version
       mismatch, or whatever value was passed to the m4exit macro.

AUTHOR
       Written by Rene' Seindal.

REPORTING BUGS
       Report	  bugs	   to:	  bug-m4@gnu.org    GNU	   M4	 home	 page:
       <http://www.gnu.org/software/m4/>  General  help	 using	GNU  software:
       <http://www.gnu.org/gethelp/>

COPYRIGHT
       Copyright  ©  2010  Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free  to	change	and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       The  full  documentation	 for m4 is maintained as a Texinfo manual.  If
       the info and m4 programs are properly installed at your site, the  com‐
       mand

	      info m4

       should give you access to the complete manual.

GNU M4 1.4.15			  August 2010				 M4(1)
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