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lib-src/ChangeLog
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lib-src/ChangeLog
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lib-src/README
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lib-src/README
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This directory contains the source code for the architecture-dependent
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files that go in ../arch-lib. At present, these are mostly utility
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programs used by Emacs.
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lib-src/etags.1
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lib-src/etags.1
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.\" Copyright (c) 1992 Free Software Foundation
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.\" See section COPYING for conditions for redistribution
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.TH etags 1 "19apr1994" "GNU Tools" "GNU Tools"
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.de BP
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.sp
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.ti -.2i
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\(**
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..
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.SH NAME
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etags, ctags \- generate tag file for Emacs, vi
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.SH SYNOPSIS
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.hy 0
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.na
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.B etags [\|\-aCDRSVh\|] [\|\-i \fIfile\fP\|] [\|\-l \fIlanguage\fP\|] [\|\-i \fIregexp\fP\|] [\|\-o \fItagfile\fP\|]
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.br
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[\|\-\-c++\|] [\|\-\-no\-defines\|] [\|\-\-ignore\-indentation\|]
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[\|\-\-language=\fIlanguage\fP\|] [\|\-\-regex=\fIregexp\fP\|]
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[\|\-\-no\-regexp\|] [\|\-\-help\|] [\|\-\-version\|]
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[\|\-\-include=\fIfile\fP\|] [\|\-\-output=\fItagfile\fP\|]
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[\|\-\-append\|] \fIfile\fP .\|.\|.
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.B ctags [\|\-aCdRSVh\|] [\|\-BtTuvwx\|] [\|\-l \fIlanguage\fP\|]
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.br
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[\|\-i \fIregexp\fP\|] [\|\-o \fItagfile\fP\|]
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[\|\-\-c++\|] [\|\-\-defines\|] [\|\-\-ignore\-indentation\|]
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[\|\-\-no\-warn\|] [\|\-\-cxref\|] [\|\-\-backward\-search\|]
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[\|\-\-forward\-search\|] [\|\-\-typedefs\|] [\|\-\-typedefs\-and\-c++\|]
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[\|\-\-language=\fIlanguage\fP\|] [\|\-\-regex=\fIregexp\fP\|]
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[\|\-\-help\|] [\|\-\-version\|]
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.br
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[\|\-\-output=\fItagfile\fP\|] [\|\-\-append\|] [\|\-\-update\|] \fIfile\fP .\|.\|.
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.ad b
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.hy 1
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.SH DESCRIPTION
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The `\|\fBetags\fP\|' program is used to create a tag table file, in a format
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understood by
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.BR emacs ( 1 )\c
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\&; the `\|\fBctags\fP\|' program is used to create a similar table in a
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format understood by
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.BR vi ( 1 )\c
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\&. Both forms of the program understand
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the syntax of C, Objective C, C++, Java, Fortran, Pascal, Cobol,
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LaTeX, Scheme, Emacs Lisp/Common Lisp, Postscript, Erlang, Prolog and
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most assembler\-like syntaxes.
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Both forms read the files specified on the command line, and write a tag
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table (defaults: `\|TAGS\|' for \fBetags\fP, `\|tags\|' for
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\fBctags\fP) in the current working directory.
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Files specified with relative file names will be recorded in the tag
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table with file names relative to the directory where the tag table
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resides. Files specified with absolute file names will be recorded
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with absolute file names.
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The programs recognize the language used in an input file based on its
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file name and contents. The --language switch can be used to force
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parsing of the file names following the switch according to the given
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language, overriding guesses based on filename extensions.
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.SH OPTIONS
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Some options make sense only for the \fBvi\fP style tag files produced
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by ctags;
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\fBetags\fP does not recognize them.
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The programs accept unambiguous abbreviations for long option names.
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.TP
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.B \-a, \-\-append
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Append to existing tag file. (For vi-format tag files, see also
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\fB\-\-update\fP.)
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.TP
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.B \-B, \-\-backward\-search
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Tag files written in the format expected by \fBvi\fP contain regular
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expression search instructions; the \fB\-B\fP option writes them using
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the delimiter `\|\fB?\fP\|', to search \fIbackwards\fP through files.
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The default is to use the delimiter `\|\fB/\fP\|', to search \fIforwards\fP
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through files.
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Only \fBctags\fP accepts this option.
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.TP
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.B \-C, \-\-c++
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Treat files with `\|.c\|' and `\|.h\|' extensions as C++ code, not C
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code. Files with `\|.C\|', `\|.H\|', `\|.cxx\|', `\|.hxx\|', or
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`\|.cc\|' extensions are always assumed to be C++ code.
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.TP
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.B \-d, \-\-defines
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Create tag entries for C preprocessor constant definitions
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and enum constants, too. This is the
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default behavior for \fBetags\fP, so this option is only accepted
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by \fBctags\fP.
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.TP
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.B \-D, \-\-no\-defines
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Do not create tag entries for C preprocessor constant definitions
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and enum constants.
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This may make the tags file much smaller if many header files are tagged.
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This is the default behavior for \fBctags\fP, so this option is only
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accepted by \fBetags\fP.
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.TP
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\fB\-l\fP \fIlanguage\fP, \fB\-\-language=\fIlanguage\fP
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Parse the following files according to the given language. More than
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one such options may be intermixed with filenames. Use \fB\-\-help\fP
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to get a list of the available languages and their default filename
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extensions. The `auto' language can be used to restore automatic
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detection of language based on filename extension. The `none'
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language may be used to disable language parsing altogether; only
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regexp matching is done in this case (see the \fB\-\-regex\fP option).
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.TP
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\fB\-\-no_globals\fP
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Do not tag global variables in C, C++, Objective C, Java. Typically
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this reduces the file size by one fourth.
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.TP
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\fB\-\-members\fP
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Tag variables that are members of strucure-like constructs in C++,
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Objective C, Java.
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.TP
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\fB\-o\fP \fItagfile\fP, \fB\-\-output=\fItagfile\fP
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Explicit name of file for tag table; overrides default `\|TAGS\|' or
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`\|tags\|'. (But ignored with \fB\-v\fP or \fB\-x\fP.)
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.TP
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\fB\-r\fP \fIregexp\fP, \fB\-\-regex=\fIregexp\fP
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Make tags based on regexp matching for each line of the files
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following this option, in addition to the tags made with the standard
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parsing based on language. May be freely intermixed with filenames
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and the \fB\-R\fP option. The regexps are cumulative, i.e. each
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option will add to the previous ones. The regexps are of the form:
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.br
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\fB/\fP\fItagregexp\fP[\fB/\fP\fInameregexp\fP]\fB/\fP
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.br
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where \fItagregexp\fP is used to match the lines that must be tagged.
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It should not match useless characters. If the match is
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such that more characters than needed are unavoidably matched by
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\fItagregexp\fP, it may be useful to add a \fInameregexp\fP, to
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narrow down the tag scope. \fBctags\fP ignores regexps without a
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\fInameregexp\fP. The syntax of regexps is the same as in emacs,
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augmented with intervals of the form \\{m,n\\}, as id ed or grep.
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.br
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Here are some examples. All the regexps are quoted to protect them
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from shell interpretation.
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.br
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Tag the DEFVAR macros in the emacs source files:
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.br
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\fI\-\-regex\='/[ \\t]*DEFVAR_[A-Z_ \\t(]+"\\([^"]+\\)"\/'\fP
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.br
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Tag VHDL files (this example is a single long line, broken here for
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formatting reasons):
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.br
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\fI\-\-language\=none\ \-\-regex='/[\ \\t]*\\(ARCHITECTURE\\|\\
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CONFIGURATION\\)\ +[^\ ]*\ +OF/'\ \-\-regex\='/[\ \\t]*\\
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\\(ATTRIBUTE\\|ENTITY\\|FUNCTION\\|PACKAGE\\(\ BODY\\)?\\
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\\|PROCEDURE\\|PROCESS\\|TYPE\\)[\ \\t]+\\([^\ \\t(]+\\)/\\3/'\fP
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.br
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Tag TCL files (this last example shows the usage of a \fItagregexp\fP):
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.br
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\fI\-\-lang\=none \-\-regex\='/proc[\ \\t]+\\([^\ \\t]+\\)/\\1/'\fP
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.TP
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.B \-R, \-\-no\-regex
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Don't do any more regexp matching on the following files. May be
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freely intermixed with filenames and the \fB\-\-regex\fP option.
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.TP
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.B \-S, \-\-ignore\-indentation
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Don't rely on indentation as much as we normally do. Currently, this
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means not to assume that a closing brace in the first column is the
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final brace of a function or structure definition in C and C++.
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.TP
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.B \-t, \-\-typedefs
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Record typedefs in C code as tags. Since this is the default behaviour
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of \fBetags\fP, only \fBctags\fP accepts this option.
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.TP
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.B \-T, \-\-typedefs\-and\-c++
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Generate tag entries for typedefs, struct, enum, and union tags, and
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C++ member functions. Since this is the default behaviour
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of \fBetags\fP, only \fBctags\fP accepts this option.
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.TP
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.B \-u, \-\-update
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Update tag entries for \fIfiles\fP specified on command line, leaving
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tag entries for other files in place. Currently, this is implemented
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by deleting the existing entries for the given files and then
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rewriting the new entries at the end of the tags file. It is often
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faster to simply rebuild the entire tag file than to use this.
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Only \fBctags\fP accepts this option.
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.TP
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.B \-v, \-\-vgrind
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Instead of generating a tag file, write index (in \fBvgrind\fP format)
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to standard output. Only \fBctags\fP accepts this option.
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.TP
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.B \-w, \-\-no\-warn
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Suppress warning messages about duplicate entries. The \fBetags\fP
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program does not check for duplicate entries, so this option is not
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allowed with it.
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.TP
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.B \-x, \-\-cxref
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Instead of generating a tag file, write a cross reference (in
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\fBcxref\fP format) to standard output. Only \fBctags\fP accepts this option.
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.TP
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.B \-H, \-\-help
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Print usage information.
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.TP
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.B \-V, \-\-version
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Print the current version of the program (same as the version of the
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emacs \fBetags\fP is shipped with).
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.SH "SEE ALSO"
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`\|\fBemacs\fP\|' entry in \fBinfo\fP; \fIGNU Emacs Manual\fP, Richard
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Stallman.
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.br
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.BR cxref ( 1 ),
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.BR emacs ( 1 ),
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.BR vgrind ( 1 ),
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.BR vi ( 1 ).
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.SH COPYING
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Copyright (c) 1992 Free Software Foundation, Inc.
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.PP
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Permission is granted to make and distribute verbatim copies of
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this manual provided the copyright notice and this permission notice
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are preserved on all copies.
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.PP
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the
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entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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.PP
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Permission is granted to copy and distribute translations of this
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manual into another language, under the above conditions for modified
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versions, except that this permission notice may be included in
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translations approved by the Free Software Foundation instead of in
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the original English.
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