Sync from coreutils. * .cppi-disable: Add regcomp.c, regex_internal.c, regex_internal.h, stat-time.h. * argmatch.h: Include verify.h (ARGMATCH_VERIFY): Use verify rather than rolling our own. (ARGMATCH_ASSERT): Remove; unused. * canonicalize.c: Assume STDC_HEADERS. * exclude.c: Include "strcase.h". * regex_internal.h [!defined _LIBC]: Likewise. * getusershell.c: Include stdio--.h rather than stdio.h and stdio-safer.h. (getusershell): Call fopen, not fopen_safer. * save-cwd.c: Include fcntl--.h rather than fcntl.h. Do not include unistd-safer.h. (save_cwd): Don't call fd_safer; no longer needed now that we include fcntl--.h. * modules/argmatch (Depends-on): Add verify. * modules/getloadavg (Depends-on): Depend on fcntl-safer, not unistd-safer. * modules/save-cwd (Depends-on): Likewise. * backupfile.m4, calloc.m4, chown.m4, cloexec.m4, dup2.m4: * fileblocks.m4, free.m4, ftruncate.m4, getcwd.m4, getpagesize.m4: * getugroups.m4, group-member.m4, idcache.m4, link-follow.m4: * mkstemp.m4, mktime.m4, mountlist.m4, nanosleep.m4, pathmax.m4: * physmem.m4, posixver.m4, putenv.m4, safe-read.m4, same.m4: * save-cwd.m4, stdio-safer.m4, unistd-safer.m4, unlinkdir.m4: * userspec.m4, xgetcwd.m4, xreadlink.m4: Don't bother checking for string.h, stdlib.h, unistd.h. * fts.m4 (gl_FUNC_FTS_CORE): Don't require AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK; that's now the lstat module's job. * jm-macros.m4 (gl_MACROS): Likewise. * prereq.m4 (gl_PREREQ): Add gl_FUNC_LSTAT. * backupfile.c: Use ARGMATCH_VERIFY, just in case. * posixtm.c (posixtime) [lint]: Initialize *all* of tm0, not just the .tm_year member, since otherwise gcc-4.0 would now warn about tm_zone, tm_gmtoff, tm_isdst, tm_yday, tm_wday. * quotearg.c (quotearg_n_options): Change code to be suboptimal, in order to avoid an unsuppressible warning from gcc on 64-bit systems. * lstat.m4 (gl_FUNC_LSTAT): Use AC_LIBSOURCES to require lstat.c and lstat.h. Remove obsolete comment. * xreadlink.m4: Use AC_LIBSOURCES and AC_LIBOBJ. * xstrtod.m4: Likewise.

#serial 3

# Copyright (C) 2005 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# Written by Paul Eggert.

AC_DEFUN([gl_UNLINKDIR],
[
  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_CHECK_HEADERS_ONCE(priv.h)

  AC_LIBSOURCES([unlinkdir.c, unlinkdir.h])
  AC_LIBOBJ([unlinkdir])

  # The Hurd, the Linux kernel, the FreeBSD kernel version 2.2 and later,
  # and Cygwin never let anyone (even root) unlink directories.
  # If anyone knows of another system for which unlink can never
  # remove a directory, please report it to <bug-coreutils@gnu.org>.
  # Unfortunately this is difficult to test for, since it requires root access
  # and might create garbage in the file system,
  # so the code below simply relies on the kernel name and version number.
  case $host in
  *-*-gnu[0-9]* | \
  *-*-linux-* | *-*-linux | \
  *-*-freebsd2.2* | *-*-freebsd[3-9]* | *-*-freebsd[1-9][0-9]* | \
  *-cygwin)
    AC_DEFINE([UNLINK_CANNOT_UNLINK_DIR], 1,
      [Define to 1 if unlink (dir) cannot possibly succeed.]);;
  esac
])