* argp/argp-fmtstream.h [!__attribute__]: Define to nothing.
* argp/argp-help.c: Don't include malloc.h, some platforms
complain and it doesn't appear to be used.
[!_LIBC && HAVE_STRERROR_R && !HAVE_DECL_STRERROR_R]: Declare
strerror_r.
[!_LIBC && !HAVE_STRERROR_R && !HAVE_DECL_STRERROR]: Declare
strerror.
(hol_entry_long_iterate): Change __attribute to __attribute__.
(_help, __argp_error, __argp_failure) [!_LIBC && (HAVE_FLOCKFILE
&& HAVE_FUNLOCKFILE)]: Protect call to flockfile and funlockfile.
(__argp_basename) [!_LIBC]: New. Taken from LSH, by Niels Möller,
modifed after comments from Ulrich Drepper.
(__argp_short_program_name): Ditto.
(__argp_state_help, __argp_error, __argp_failure): Use it.
(__argp_failure): Use strerror when necessary.