Emacs does not use Babyl files since 23.1, and you can use M-x unrmail.

* msdos/mainmake.v2 (install): Remove b2m.

* lisp/emacs-lisp/authors.el (authors-valid-file-names): Add b2m.c.

* lib-src/b2m.c, lib-src/b2m.pl: Remove files.
* lib-src/Makefile.in (INSTALLABLES): Remove b2m.
* lib-src/makefile.w32-in ($(BLD)/b2m.$(O)): Remove.

* doc/emacs/ack.texi (Acknowledgments): No more b2m.c.

* admin/quick-install-emacs (PUBLIC_LIBSRC_BINARIES): Remove b2m.

* INSTALL, make-dist: Remove references to b2m.
* Makefile.in (MAN_PAGES): Remove b2m.1.

* b2m.c (concat, fatal): Use const char*.
(main): Don't assign labels a string literal.

* ebrowse.c (struct member): filename, def_filename is const.
(struct sym): filename, sfilename is const.
(struct kw): name is const.
(add_sym, yyerror, token_string, insert_keyword, main): Use const char*.

* emacsclient.c (message, sock_err_message, send_to_emacs)
(quote_argument, set_local_socket)
(start_daemon_and_retry_set_socket): Use const char*.

* etags.c (compressor, language, Ada_suffix, Ada_help, Asm_suffixes)
(Asm_help, default_C_suffixes, default_C_help, Cplusplus_suffixes)
(Cplusplus_help, Cjava_suffixes, Cobol_suffixes, Cstar_suffixes)
(Erlang_suffixes, Erlang_help, Forth_suffixes, Forth_help)
(Fortran_suffixes, Fortran_help, HTML_suffixes,  HTML_help)
(Lisp_suffixes, Lisp_help, Lua_suffixes, Lua_help)
(Makefile_filenames, Makefile_help, Objc_suffixes, Objc_help)
(Pascal_suffixes, Pascal_help, Perl_suffixes, Perl_interpreters)
(Perl_help, PHP_suffixes, PHP_help, plain_C_suffixses, PS_suffixes)
(PS_help, Prolog_suffixes, Prolog_help, Python_suffixes, Python_help)
(Scheme_suffixes, Scheme_help, TeX_suffixes, TeX_help, Texinfo_suffixes)
(Texinfo_help, Yacc_suffixes, Yacc_help, auto_help, none_help)
(no_lang_help, print_language_names)
(get_language_from_interpreter, get_language_from_filename)
(init, make_tag, struct C_stab_entry, write_classname, TEX_defenv)
(TEX_decode_env, nocase_tail, savestr, savenstr, fatal, pfatal)
(concat): Use const char*.

* make-docfile.c (error, fatal, scan_c_file, scan_lisp_file): Use
const char *.

* movemail.c (fatal, error, concat): Use const char *.

* pop.c (pop_multi_first, socket_connection, sendline): Use conat char*.

* pop.h (pop_multi_first): Use const char *.
(_ARGS): Remove.

* sorted-doc.c (error, fatal, states): Use const char *.

* update-game-score.c (get_prefix, write_scores, main): Use const char*.

* lib-src/update-game-score.c (usage):  Add NO_RETURN specifier.
* lib-src/movemail.c (fatal, pfatal_with_name, pfatal_and_delete):
* lib-src/make-docfile.c (fatal):
* lib-src/hexl.c (usage):
* lib-src/fakemail.c (fatal):
* lib-src/etags.c (fatal, suggest_asking_for_help, pfatal):
* lib-src/emacsclient.c (fatal):
* lib-src/b2m.c (fatal): Likewise.

* lib-src/update-game-score.c: Convert function definitions to standard C.
* lib-src/sorted-doc.c:
* lib-src/profile.c:
* lib-src/pop.c:
* lib-src/movemail.c:
* lib-src/make-docfile.c:
* lib-src/hexl.c:
* lib-src/fakemail.c:
* lib-src/etags.c:
* lib-src/ebrowse.c:
* lib-src/digest-doc.c:
* lib-src/b2m.c: Likewise.

* lib-src/make-docfile.c (xmalloc, xrealloc, concat, readline, fatal):
* lib-src/b2m.c (scan_file, scan_lisp_file, scan_c_file): Convert to
standard C prototypes.

* src/term.c (term_clear_mouse_face, Fidentity):
* src/syssignal.h (signal_handler_t):
* src/lisp.h (memory_warnings):
* src/coding.h (preferred_coding_system):
* src/cm.h (evalcost):
* src/blockinput.h (reinvoke_input_signal): Convert to standard C prototypes.

(TM_YEAR_BASE): New macro.
(TM_YEAR_IN_ASCTIME_RANGE): Don't define if already defined, so
that s/ files can override this.  Use the more-conservative range
1000-9999.
(main): Check for asctime returning NULL.
* lib-src/fakemail.c: Likewise.
* src/editfns.c (TM_YEAR_IN_ASCTIME_RANGE): New macro, identical to
../lib-src/b2m.c and ../lib-src/editfns.c.
(Fcurrent_time_string): Use it.
Document that the year might not consume 4 columns if it's outside
the range 1000-9999.
Check for asctime failure.
Don't assume that the output string length is always exactly 24.

(TM_YEAR_IN_ASCTIME_RANGE): New macro.
(main): Check for out-of-range time stamps.
* fakemail.c: Likewise.

replace w/ `EXIT_SUCCESS' and `EXIT_FAILURE', respectively.
(main): Use `EXIT_SUCCESS' or `EXIT_FAILURE' for return value.