etags (GNU Emacs 25.2) Copyright (C) 2017 Free Software Foundation, Inc. This program is distributed under the terms in ETAGS.README

Usage: etags.emacs25 [options] [[regex-option ...] file-name] ... These are the options accepted by etags.emacs25. 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. --declarations In C and derived languages, create tags for function declarations, and create tags for extern variables unless --no-globals is used. -D, --no-defines Don't create tag entries for C #define constants and enum constants. This makes the tags file smaller. -i FILE, --include=FILE Include a note in tag file indicating that, when searching for a tag, one should also consult the tags file FILE after checking the current file. -l LANG, --language=LANG Force the following files to be considered as written in the named language up to the next --language=LANG option. --no-globals Do not create tag entries for global variables in some languages. This makes the tags file smaller. --no-line-directive Ignore #line preprocessor directives in C and derived languages. --no-members Do not create tag entries for members of structures in some languages. -Q, --class-qualify Qualify tag names with their class name in C++, ObjC, Java, and Perl. This produces tag names of the form "class::member" for C++, "class(category)" for Objective C, and "class.member" for Java. For Objective C, this also produces class methods qualified with their arguments, as in "foo:bar:baz:more". For Perl, this produces "package::member". -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. -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 go .go 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 ruby Rakefile Thorfile .rb .ru .rbw 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