(libintl.h): Include this if _LIBC. Otherwise include gettext.h.
(wchar.h): Include, maybe.
(attribute_hidden): Define if not defind.
(__getopt_initialized): Use attribute_hidden.
(__libc_argc, __libc_argv): Renamed from original_argc, etc.
(__getopt_nonoption_flags, nonoption_flags_max_len, nonoption_flags_len):
Conditional on USE_NONOPTION_FLAGS.
(SWAP_FLAGS): New definitions.
(exchange): Test USE_NONOPTION_FLAGS.
(_getopt_initialize): Test USE_NONOPTION_FLAGS.
(_getopt_internal): Error if argc < 1. New local var print_errors.
Improve test for ambiguous long option.
Add LIBIO support for error message output.
(NONOPTION_P): Test USE_NONOPTION_FLAGS.
(eval, display): New vars.
(longopts): Add --eval and --display.
(decode_options): Add -e and -d processing.
(print_help_and_exit): Update the usage string.
(main): Add support for --eval and --display.
auto-detection is enabled and the `::' qualifier is met.
(consider_token, C_entries): Several bugs corrected that tagged
some declarations even though --declarations was not used.
(plainc): New macro.
(C_entries): Use it.
(C_entries): Several cosmetic changes.
(C_entries): Invalidate the token is some cases.
(Ada_funcs): Do not tag "use type Xxxx;".
New language HTML.
(make_tag): Never generate null length tag names.
(linebuffer_init): Renamed from initbuffer. All callers changed.
(pattern): Structure renamed to `regexp', member regex renamed to
pattern.
(node_st): Member pat renamed to regex.
(pattern); New member force_explicit_name, for future use. Now
always set to true, cannot be reset.
(add_regex, regex_tag_multiline, readline): Use it.
(main): Free some global structures.
(fdesc): New member `written'.
(readline, process_file): Initialise it.
(put_entries): Set it.
(main): Use it to create entries for files without tags.
(total_size_of_entries): Do not count invalid tags.
(etags_strcasecmp): Like BSD's, for compatibility.
(strcaseeq): Make it into a macro.
