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Diff for /src/usr.bin/m4/m4.1 between version 1.22 and 1.23

version 1.22, 2001/09/27 11:40:33 version 1.23, 2001/09/29 11:56:18
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 .Nd macro language processor  .Nd macro language processor
 .Sh SYNOPSIS  .Sh SYNOPSIS
 .Nm m4  .Nm m4
   .Op Fl d Ar flags
   .Op Fl t Ar name
 .Op Fl g  .Op Fl g
 .Oo  .Oo
 .Fl D Ns Ar name Ns Op Ar =value  .Fl D Ns Ar name Ns Op Ar =value
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 Add directory  Add directory
 .Ar dirname  .Ar dirname
 to the include path.  to the include path.
   .It Fl d Ar "flags"
   Set trace flags.
   .Ar flags
   may hold the following:
   .Bl -tag -width Ds
   .It Ar a
   print macro arguments.
   .It Ar c
   print macro expansion over several lines.
   .It Ar e
   print result of macro expansion.
   .It Ar f
   print filename location.
   .It Ar l
   print line number.
   .It Ar q
   quote arguments and expansion with the current quotes.
   .It Ar t
   start with all macros traced.
   .It Ar x
   number macro expansions.
   .It Ar V
   turn on all options.
   .El
   .Pp
   By default, trace is set to
   .Qq eq .
   .It Fl t Ar macro
   Turn tracing on for
   .Ar macro .
 .It Fl g  .It Fl g
 Activate GNU-m4 compatibility mode.  Activate GNU-m4 compatibility mode.
 In this mode, changequote with  In this mode, changequote with
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 .It Ic __file__  .It Ic __file__
 Returns the current file's name.  Returns the current file's name.
 .El  .El
   .Sh COMPATIBILITY
   .Nm
   follows the Single Unix 2 specification, along with a few extensions taken
   from
   .Nm gnu-m4 .
   .Pp
   The
   .Fl s
   option
   .Po
   .Xr cpp 1 's
   #line directives
   .Pc
   is currently not supported.
   Flags
   .Fl I ,
   .Fl d ,
   .Fl t
   are non-standard.
   .Pp
   The output format of tracing and of
   .Ic dumpdef
   are not specified in any standard,
   are likely to change and should not be relied upon.
   The current format of tracing is closely modelled on
   .Nm gnu-m4 ,
   to allow
   .Nm autoconf
   to work.
   .Pp
   For portability, one should not use the macros
   .Ic builtin ,
   .Ic esycmd ,
   .Ic expr ,
   .Ic indir ,
   .Ic paste ,
   .Ic patsubst ,
   .Ic regexp ,
   .Ic spaste ,
   .Ic unix ,
   .Ic __line__ ,
   .Ic __file__ .
   .Pp
   All builtins do expand without arguments in many other
   .Nm m4 .
   .Pp
   Many other
   .Nm
   have dire size limitations with respect to buffer sizes.
 .Sh AUTHORS  .Sh AUTHORS
 Ozan Yigit <oz@sis.yorku.ca> and Richard A. O'Keefe (ok@goanna.cs.rmit.OZ.AU).  Ozan Yigit <oz@sis.yorku.ca> and Richard A. O'Keefe (ok@goanna.cs.rmit.OZ.AU).
 GNU-m4 compatibility extensions by Marc Espie <espie@cvs.openbsd.org>.  GNU-m4 compatibility extensions by Marc Espie <espie@cvs.openbsd.org>.
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