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+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.43.3.
+.TH M4 "1" "September 2013" "GNU M4 1.4.17" "User Commands"
+.SH NAME
+m4 \- macro processor
+.SH SYNOPSIS
+.B m4
+[\fIOPTION\fR]... [\fIFILE\fR]...
+.SH DESCRIPTION
+Process macros in FILEs.  If no FILE or if FILE is `\-', standard input
+is read.
+.PP
+Mandatory or optional arguments to long options are mandatory or optional
+for short options too.
+.SS "Operation modes:"
+.TP
+\fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-\-version\fR
+output version information and exit
+.TP
+\fB\-E\fR, \fB\-\-fatal\-warnings\fR
+once: warnings become errors, twice: stop
+execution at first error
+.TP
+\fB\-i\fR, \fB\-\-interactive\fR
+unbuffer output, ignore interrupts
+.TP
+\fB\-P\fR, \fB\-\-prefix\-builtins\fR
+force a `m4_' prefix to all builtins
+.TP
+\fB\-Q\fR, \fB\-\-quiet\fR, \fB\-\-silent\fR
+suppress some warnings for builtins
+.TP
+\fB\-\-warn\-macro\-sequence\fR[=\fIREGEXP\fR]
+warn if macro definition matches REGEXP,
+.IP
+default \e$\e({[^}]*}\e|[0\-9][0\-9]+\e)
+.SS "Preprocessor features:"
+.TP
+\fB\-D\fR, \fB\-\-define=NAME\fR[=\fIVALUE\fR]
+define NAME as having VALUE, or empty
+.TP
+\fB\-I\fR, \fB\-\-include\fR=\fIDIRECTORY\fR
+append DIRECTORY to include path
+.TP
+\fB\-s\fR, \fB\-\-synclines\fR
+generate `#line NUM "FILE"' lines
+.TP
+\fB\-U\fR, \fB\-\-undefine\fR=\fINAME\fR
+undefine NAME
+.SS "Limits control:"
+.TP
+\fB\-g\fR, \fB\-\-gnu\fR
+override \fB\-G\fR to re\-enable GNU extensions
+.TP
+\fB\-G\fR, \fB\-\-traditional\fR
+suppress all GNU extensions
+.TP
+\fB\-H\fR, \fB\-\-hashsize\fR=\fIPRIME\fR
+set symbol lookup hash table size [509]
+.TP
+\fB\-L\fR, \fB\-\-nesting\-limit\fR=\fINUMBER\fR
+change nesting limit, 0 for unlimited [0]
+.SS "Frozen state files:"
+.TP
+\fB\-F\fR, \fB\-\-freeze\-state\fR=\fIFILE\fR
+produce a frozen state on FILE at end
+.TP
+\fB\-R\fR, \fB\-\-reload\-state\fR=\fIFILE\fR
+reload a frozen state from FILE at start
+.SS "Debugging:"
+.TP
+\fB\-d\fR, \fB\-\-debug\fR[=\fIFLAGS\fR]
+set debug level (no FLAGS implies `aeq')
+.TP
+\fB\-\-debugfile\fR[=\fIFILE\fR]
+redirect debug and trace output to FILE
+(default stderr, discard if empty string)
+.TP
+\fB\-l\fR, \fB\-\-arglength\fR=\fINUM\fR
+restrict macro tracing size
+.TP
+\fB\-t\fR, \fB\-\-trace\fR=\fINAME\fR
+trace NAME when it is defined
+.SS "FLAGS is any of:"
+.TP
+a
+show actual arguments
+.TP
+c
+show before collect, after collect and after call
+.TP
+e
+show expansion
+.TP
+f
+say current input file name
+.TP
+i
+show changes in input files
+.TP
+l
+say current input line number
+.TP
+p
+show results of path searches
+.TP
+q
+quote values as necessary, with a or e flag
+.TP
+t
+trace for all macro calls, not only traceon'ed
+.TP
+x
+add a unique macro call id, useful with c flag
+.TP
+V
+shorthand for all of the above flags
+.PP
+If defined, the environment variable `M4PATH' is a colon\-separated list
+of directories included after any specified by `\-I'.
+.PP
+Exit status is 0 for success, 1 for failure, 63 for frozen file version
+mismatch, or whatever value was passed to the m4exit macro.
+.SH AUTHOR
+Written by Rene' Seindal.
+.SH "REPORTING BUGS"
+Report bugs to: bug\-m4@gnu.org
+.br
+GNU M4 home page: <http://www.gnu.org/software/m4/>
+.br
+General help using GNU software: <http://www.gnu.org/gethelp/>
+.SH COPYRIGHT
+Copyright \(co 2013 Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
+.br
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+.SH "SEE ALSO"
+The full documentation for
+.B m4
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B m4
+programs are properly installed at your site, the command
+.IP
+.B info m4
+.PP
+should give you access to the complete manual.