ctags (GNU Emacs 24.5) Copyright (C) 2015 Free Software Foundation, Inc. This program is distributed under the terms in ETAGS.README

Usage: ctags [options] [[regex-option ...] file-name] ... These are the options accepted by ctags. You may use unambiguous abbreviations for the long option names. A - as file name means read names from stdin (one per line). Absolute names are stored in the output file as they are. Relative ones are stored relative to the output file's directory. -a, --append Append tag entries to existing tags file. --packages-only For Ada files, only generate tags for packages. -B, --backward-search Write the search commands for the tag entries using '?', the backward-search command instead of '/', the forward-search command. --declarations In C and derived languages, create tags for function declarations, and create tags for extern variables if --globals is used. -d, --defines Create tag entries for C #define constants and enum constants, too. -l LANG, --language=LANG Force the following files to be considered as written in the named language up to the next --language=LANG option. --globals Create tag entries for global variables in some languages. --members Create tag entries for members of structures in some languages. -r REGEXP, --regex=REGEXP or --regex=@regexfile Make a tag for each line matching a regular expression pattern in the following files. {LANGUAGE}REGEXP uses REGEXP for LANGUAGE files only. REGEXFILE is a file containing one REGEXP per line. REGEXP takes the form /TAGREGEXP/TAGNAME/MODS, where TAGNAME/ is optional. The TAGREGEXP pattern is anchored (as if preceded by ^). If TAGNAME/ is present, the tags created are named. For example Tcl named tags can be created with: --regex="/proc[ \t]+\([^ \t]+\)/\1/.". MODS are optional one-letter modifiers: `i' means to ignore case, `m' means to allow multi-line matches, `s' implies `m' and causes dot to match any character, including newline. -R, --no-regex Don't create tags from regexps for the following files. -I, --ignore-indentation In C and C++ do not assume that a closing brace in the first column is the final brace of a function or structure definition. -o FILE, --output=FILE Write the tags to FILE. --parse-stdin=NAME Read from standard input and record tags as belonging to file NAME. -t, --typedefs Generate tag entries for C and Ada typedefs. -T, --typedefs-and-c++ Generate tag entries for C typedefs, C struct/enum/union tags, and C++ member functions. -u, --update Update the tag entries for the given files, leaving tag entries for other files in place. Currently, this is implemented by deleting the existing entries for the given files and then rewriting the new entries at the end of the tags file. It is often faster to simply rebuild the entire tag file than to use this. -v, --vgrind Print on the standard output an index of items intended for human consumption, similar to the output of vgrind. The index is sorted, and gives the page number of each item. -x, --cxref Like --vgrind, but in the style of cxref, rather than vgrind. The output uses line numbers instead of page numbers, but beyond that the differences are cosmetic; try both to see which you like. -V, --version Print the version of the program. -h, --help Print this help message. Followed by one or more `--language' options prints detailed help about tag generation for the specified languages. These are the currently supported languages, along with the default file names and dot suffixes: ada .ads .adb .ada asm .a .asm .def .inc .ins .s .sa .S .src c .c .h c++ .C .c++ .cc .cpp .cxx .H .h++ .hh .hpp .hxx .M .pdb c* .cs .hs cobol .COB .cob erlang .erl .hrl forth .fth .tok fortran .F .f .f90 .for html .htm .html .shtml java .java lisp .cl .clisp .el .l .lisp .LSP .lsp .ml lua .lua .LUA makefile Makefile makefile GNUMakefile Makefile.in Makefile.am objc .lm .m pascal .p .pas perl .pl .pm php .php .php3 .php4 postscript .ps .psw proc .pc prolog .prolog python .py scheme .oak .sch .scheme .SCM .scm .SM .sm .ss .t tex .bib .clo .cls .ltx .sty .TeX .tex texinfo .texi .texinfo .txi yacc .y .y++ .ym .yxx .yy auto none where `auto' means use default language for files based on file name suffix, and `none' means only do regexp processing on files. If no language is specified and no matching suffix is found, the first line of the file is read for a sharp-bang (#!) sequence followed by the name of an interpreter. If no such sequence is found, Fortran is tried first; if no tags are found, C is tried next. When parsing any C file, a "class" or "template" keyword switches to C++. Compressed files are supported using gzip, bzip2, and xz. For detailed help on a given language use, for example, etags --help --lang=ada. Report bugs to bug-gnu-emacs@gnu.org