Go back to single-file bootstrap

Gnulib now supports a single-file bootstrap with --pull
and --gen options, in place of the three files
autopull.sh, autogen.sh, bootstrap-funclib.sh.
This keeps the top level a bit cleaner.
* bootstrap: Sync from Gnulib build-aux/bootstrap
instead of from top/bootstrap.
* autopull.sh, autogen.sh, bootstrap-funclib.sh: Remove.

6 files changed, 1326 insertions, 1386 deletions

diff --git a/NEWS b/NEWS
index 8614f555..145a515e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-GNU tar NEWS - User visible changes. 2022-10-07
+GNU tar NEWS - User visible changes. 2023-01-06
 Please send GNU tar bug reports to <bug-tar@gnu.org>
 
 version 1.34.90 (git)
@@ -9,9 +9,6 @@ version 1.34.90 (git)
 * Leave the devmajor and devminor fields empty (rather than zero) for
   non-special files, as this is more compatible with traditional tar.
 
-* New build scripts ./autopull.sh and ./autogen.sh, to separate
-  fetching from autogenerating source files.  See README-hacking.
-
 * Bug fixes
 
 ** Warn "file changed as we read it" less often.
diff --git a/README-hacking b/README-hacking
index dc80de10..4a6ba546 100644
--- a/README-hacking
+++ b/README-hacking
@@ -57,9 +57,9 @@ The file bootstrap.conf contains bootstrapping configuration.
 Several options are provided that modify its behavior.
 Run './bootstrap --help' for a list.
 
-To only fetch auxiliary files from the network, run ./autopull.sh.
+To only fetch auxiliary files from the network, run './bootstrap --pull'.
 To only generate files such as 'configure', without accessing the
-network, run ./autogen.sh.  The 'bootstrap' script does both.
+network, run './bootstrap --gen'.
 
 
 * Copyright information
diff --git a/autogen.sh b/autogen.sh
deleted file mode 100755
index aaba0807..00000000
--- a/autogen.sh
+++ /dev/null
@@ -1,486 +0,0 @@
-#!/bin/sh
-# Convenience script for regenerating all autogeneratable files that are
-# omitted from the version control repository. In particular, this script
-# also regenerates all aclocal.m4, config.h.in, Makefile.in, configure files
-# with new versions of autoconf or automake.
-
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as build-aux/autogen.sh in gnulib.  However,
-# to be useful to your package, you should place a copy of it under
-# version control in the top-level directory of your package.  The
-# intent is that all customization can be done with a bootstrap.conf
-# file also maintained in your version control; gnulib comes with a
-# template build-aux/bootstrap.conf to get you started.
-#
-# Alternatively, you can use an autogen.sh script that is specific
-# to your package.
-
-scriptversion=2022-07-24.15; # UTC
-
-me="$0"
-medir=`dirname "$me"`
-
-# Read the function library and the configuration.
-. "$medir"/bootstrap-funclib.sh
-
-# Ensure that CDPATH is not set.  Otherwise, the output from cd
-# would cause trouble in at least one use below.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
-
-# Environment variables that may be set by the user.
-: "${AUTOPOINT=autopoint}"
-: "${AUTORECONF=autoreconf}"
-
-if test "$vc_ignore" = auto; then
-  vc_ignore=
-  test -d .git && vc_ignore=.gitignore
-  test -d CVS && vc_ignore="$vc_ignore .cvsignore"
-fi
-
-usage() {
-  cat <<EOF
-Usage: $me [OPTION]...
-Bootstrap this package from the checked-out sources.
-
-Optional environment variables:
-  GNULIB_SRCDIR            Specifies the local directory where gnulib
-                           sources reside.  Use this if you already
-                           have gnulib sources on your machine, and
-                           you want to use these sources.
-
-Options:
-  --copy                   copy files instead of creating symbolic links
-  --force                  attempt to bootstrap even if the sources seem
-                           not to have been checked out
-EOF
-  bootstrap_print_option_usage_hook
-  cat <<EOF
-If the file bootstrap.conf exists in the same directory as this script, its
-contents are read as shell variables to configure the bootstrap.
-
-For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
-are honored.
-
-Gnulib sources are assumed to be present:
-  * in \$GNULIB_SRCDIR, if that environment variable is set,
-  * otherwise, in the 'gnulib' submodule, if such a submodule is configured,
-  * otherwise, in the 'gnulib' subdirectory.
-
-Running without arguments will suffice in most cases.
-EOF
-}
-
-# Parse options.
-
-# Whether to use copies instead of symlinks.
-copy=false
-
-for option
-do
-  case $option in
-  --help)
-    usage
-    exit;;
-  --version)
-    set -e
-    echo "autogen.sh $scriptversion"
-    echo "$copyright"
-    exit 0
-    ;;
-  --force)
-    checkout_only_file=;;
-  --copy)
-    copy=true;;
-  *)
-    bootstrap_option_hook $option || die "$option: unknown option";;
-  esac
-done
-
-test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
-  || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option is specified, but does not denote a directory"
-
-if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
-  die "Running this script from a non-checked-out distribution is risky."
-fi
-
-if $use_gnulib; then
-  if test -z "$GNULIB_SRCDIR"; then
-    gnulib_path=$(test -f .gitmodules && git config --file .gitmodules submodule.gnulib.path)
-    test -z "$gnulib_path" && gnulib_path=gnulib
-    GNULIB_SRCDIR=$gnulib_path
-  fi
-fi
-
-version_controlled_file() {
-  parent=$1
-  file=$2
-  if test -d .git; then
-    git rm -n "$file" > /dev/null 2>&1
-  elif test -d .svn; then
-    svn log -r HEAD "$file" > /dev/null 2>&1
-  elif test -d CVS; then
-    grep -F "/${file##*/}/" "$parent/CVS/Entries" 2>/dev/null |
-             grep '^/[^/]*/[0-9]' > /dev/null
-  else
-    warn_ "no version control for $file?"
-    false
-  fi
-}
-
-# Strip blank and comment lines to leave significant entries.
-gitignore_entries() {
-  sed '/^#/d; /^$/d' "$@"
-}
-
-# If $STR is not already on a line by itself in $FILE, insert it at the start.
-# Entries are inserted at the start of the ignore list to ensure existing
-# entries starting with ! are not overridden.  Such entries support
-# whitelisting exceptions after a more generic blacklist pattern.
-insert_if_absent() {
-  file=$1
-  str=$2
-  test -f $file || touch $file
-  test -r $file || die "Error: failed to read ignore file: $file"
-  duplicate_entries=$(gitignore_entries $file | sort | uniq -d)
-  if [ "$duplicate_entries" ] ; then
-    die "Error: Duplicate entries in $file: " $duplicate_entries
-  fi
-  linesold=$(gitignore_entries $file | wc -l)
-  linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
-  if [ $linesold != $linesnew ] ; then
-    { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
-      || die "insert_if_absent $file $str: failed"
-  fi
-}
-
-# Adjust $PATTERN for $VC_IGNORE_FILE and insert it with
-# insert_if_absent.
-insert_vc_ignore() {
-  vc_ignore_file="$1"
-  pattern="$2"
-  case $vc_ignore_file in
-  *.gitignore)
-    # A .gitignore entry that does not start with '/' applies
-    # recursively to subdirectories, so prepend '/' to every
-    # .gitignore entry.
-    pattern=$(echo "$pattern" | sed s,^,/,);;
-  esac
-  insert_if_absent "$vc_ignore_file" "$pattern"
-}
-
-symlink_to_dir()
-{
-  src=$1/$2
-  dst=${3-$2}
-
-  test -f "$src" && {
-
-    # If the destination directory doesn't exist, create it.
-    # This is required at least for "lib/uniwidth/cjk.h".
-    dst_dir=$(dirname "$dst")
-    if ! test -d "$dst_dir"; then
-      mkdir -p "$dst_dir"
-
-      # If we've just created a directory like lib/uniwidth,
-      # tell version control system(s) it's ignorable.
-      # FIXME: for now, this does only one level
-      parent=$(dirname "$dst_dir")
-      for dot_ig in x $vc_ignore; do
-        test $dot_ig = x && continue
-        ig=$parent/$dot_ig
-        insert_vc_ignore $ig "${dst_dir##*/}"
-      done
-    fi
-
-    if $copy; then
-      {
-        test ! -h "$dst" || {
-          echo "$me: rm -f $dst" &&
-          rm -f "$dst"
-        }
-      } &&
-      test -f "$dst" &&
-      cmp -s "$src" "$dst" || {
-        echo "$me: cp -fp $src $dst" &&
-        cp -fp "$src" "$dst"
-      }
-    else
-      # Leave any existing symlink alone, if it already points to the source,
-      # so that broken build tools that care about symlink times
-      # aren't confused into doing unnecessary builds.  Conversely, if the
-      # existing symlink's timestamp is older than the source, make it afresh,
-      # so that broken tools aren't confused into skipping needed builds.  See
-      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
-      test -h "$dst" &&
-      src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
-      dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
-      test "$src_i" = "$dst_i" &&
-      both_ls=$(ls -dt "$src" "$dst") &&
-      test "X$both_ls" = "X$dst$nl$src" || {
-        dot_dots=
-        case $src in
-        /*) ;;
-        *)
-          case /$dst/ in
-          *//* | */../* | */./* | /*/*/*/*/*/)
-             die "invalid symlink calculation: $src -> $dst";;
-          /*/*/*/*/)    dot_dots=../../../;;
-          /*/*/*/)      dot_dots=../../;;
-          /*/*/)        dot_dots=../;;
-          esac;;
-        esac
-
-        echo "$me: ln -fs $dot_dots$src $dst" &&
-        ln -fs "$dot_dots$src" "$dst"
-      }
-    fi
-  }
-}
-
-# Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
-found_aux_dir=no
-grep '^[	 ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'])' configure.ac \
-    >/dev/null && found_aux_dir=yes
-grep '^[	 ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
-    >/dev/null && found_aux_dir=yes
-test $found_aux_dir = yes \
-  || die "configure.ac lacks 'AC_CONFIG_AUX_DIR([$build_aux])'; add it"
-
-# If $build_aux doesn't exist, create it now, otherwise some bits
-# below will malfunction.  If creating it, also mark it as ignored.
-if test ! -d $build_aux; then
-  mkdir $build_aux
-  for dot_ig in x $vc_ignore; do
-    test $dot_ig = x && continue
-    insert_vc_ignore $dot_ig $build_aux
-  done
-fi
-
-check_build_prerequisites false
-
-use_libtool=0
-# We'd like to use grep -E, to see if any of LT_INIT,
-# AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
-# but that's not portable enough (e.g., for Solaris).
-grep '^[	 ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
-  && use_libtool=1
-grep '^[	 ]*LT_INIT' configure.ac >/dev/null \
-  && use_libtool=1
-if test $use_libtool = 1; then
-  find_tool LIBTOOLIZE glibtoolize libtoolize
-fi
-
-if $use_gnulib; then
-  gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
-  <$gnulib_tool || exit $?
-fi
-
-# NOTE: we have to be careful to run both autopoint and libtoolize
-# before gnulib-tool, since gnulib-tool is likely to provide newer
-# versions of files "installed" by these two programs.
-# Then, *after* gnulib-tool (see below), we have to be careful to
-# run autoreconf in such a way that it does not run either of these
-# two just-pre-run programs.
-
-# Import from gettext.
-with_gettext=yes
-grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
-    with_gettext=no
-
-if test $with_gettext = yes || test $use_libtool = 1; then
-
-  tempbase=.bootstrap$$
-  trap "rm -f $tempbase.0 $tempbase.1" 1 2 13 15
-
-  > $tempbase.0 > $tempbase.1 &&
-  find . ! -type d -print | sort > $tempbase.0 || exit
-
-  if test $with_gettext = yes; then
-    # Released autopoint has the tendency to install macros that have been
-    # obsoleted in current gnulib, so run this before gnulib-tool.
-    echo "$0: $AUTOPOINT --force"
-    $AUTOPOINT --force || exit
-  fi
-
-  # Autoreconf runs aclocal before libtoolize, which causes spurious
-  # warnings if the initial aclocal is confused by the libtoolized
-  # (or worse out-of-date) macro directory.
-  # libtoolize 1.9b added the --install option; but we support back
-  # to libtoolize 1.5.22, where the install action was default.
-  if test $use_libtool = 1; then
-    install=
-    case $($LIBTOOLIZE --help) in
-      *--install*) install=--install ;;
-    esac
-    echo "running: $LIBTOOLIZE $install --copy"
-    $LIBTOOLIZE $install --copy
-  fi
-
-  find . ! -type d -print | sort >$tempbase.1
-  old_IFS=$IFS
-  IFS=$nl
-  for file in $(comm -13 $tempbase.0 $tempbase.1); do
-    IFS=$old_IFS
-    parent=${file%/*}
-    version_controlled_file "$parent" "$file" || {
-      for dot_ig in x $vc_ignore; do
-        test $dot_ig = x && continue
-        ig=$parent/$dot_ig
-        insert_vc_ignore "$ig" "${file##*/}"
-      done
-    }
-  done
-  IFS=$old_IFS
-
-  rm -f $tempbase.0 $tempbase.1
-  trap - 1 2 13 15
-fi
-
-# Import from gnulib.
-
-if $use_gnulib; then
-  gnulib_tool_options="\
-   --no-changelog\
-   --aux-dir=$build_aux\
-   --doc-base=$doc_base\
-   --lib=$gnulib_name\
-   --m4-base=$m4_base/\
-   --source-base=$source_base/\
-   --tests-base=$tests_base\
-   --local-dir=$local_gl_dir\
-   $gnulib_tool_option_extras\
-  "
-  if test $use_libtool = 1; then
-    case "$gnulib_tool_options " in
-      *' --libtool '*) ;;
-      *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
-    esac
-  fi
-  echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
-  $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
-    || die "gnulib-tool failed"
-
-  for file in $gnulib_files; do
-    symlink_to_dir "$GNULIB_SRCDIR" $file \
-      || die "failed to symlink $file"
-  done
-fi
-
-bootstrap_post_import_hook \
-  || die "bootstrap_post_import_hook failed"
-
-# Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
-# gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
-# The following requires GNU find 4.2.3 or newer.  Considering the usual
-# portability constraints of this script, that may seem a very demanding
-# requirement, but it should be ok.  Ignore any failure, which is fine,
-# since this is only a convenience to help developers avoid the relatively
-# unusual case in which a symlinked-to .m4 file is git-removed from gnulib
-# between successive runs of this script.
-find "$m4_base" "$source_base" \
-  -depth \( -name '*.m4' -o -name '*.[ch]' \) \
-  -type l -xtype l -delete > /dev/null 2>&1
-
-# Invoke autoreconf with --force --install to ensure upgrades of tools
-# such as ylwrap.
-AUTORECONFFLAGS="--verbose --install --force -I $m4_base $ACLOCAL_FLAGS"
-
-# Some systems (RHEL 5) are using ancient autotools, for which the
-# --no-recursive option had not been invented.  Detect that lack and
-# omit the option when it's not supported.  FIXME in 2017: remove this
-# hack when RHEL 5 autotools are updated, or when they become irrelevant.
-case $($AUTORECONF --help) in
-  *--no-recursive*) AUTORECONFFLAGS="$AUTORECONFFLAGS --no-recursive";;
-esac
-
-# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
-echo "running: AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS"
-AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS \
-  || die "autoreconf failed"
-
-# Get some extra files from gnulib, overriding existing files.
-for file in $gnulib_extra_files; do
-  case $file in
-    */INSTALL) dst=INSTALL;;
-    build-aux/*) dst=$build_aux/${file#build-aux/};;
-    *) dst=$file;;
-  esac
-  symlink_to_dir "$GNULIB_SRCDIR" $file $dst \
-    || die "failed to symlink $file"
-done
-
-if test $with_gettext = yes; then
-  # Create gettext configuration.
-  echo "$0: Creating po/Makevars from po/Makevars.template ..."
-  rm -f po/Makevars
-  sed '
-    /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
-    /^COPYRIGHT_HOLDER *=/s/=.*/= '"$COPYRIGHT_HOLDER"'/
-    /^MSGID_BUGS_ADDRESS *=/s|=.*|= '"$MSGID_BUGS_ADDRESS"'|
-    /^XGETTEXT_OPTIONS *=/{
-      s/$/ \\/
-      a\
-          '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
-    }
-  ' po/Makevars.template >po/Makevars \
-    || die 'cannot generate po/Makevars'
-
-  # If the 'gettext' module is in use, grab the latest Makefile.in.in.
-  # If only the 'gettext-h' module is in use, assume autopoint already
-  # put the correct version of this file into place.
-  case $gnulib_modules in
-    *gettext-h*) ;;
-    *gettext*)
-      cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in \
-        || die "cannot create po/Makefile.in.in"
-      ;;
-  esac
-
-  if test -d runtime-po; then
-    # Similarly for runtime-po/Makevars, but not quite the same.
-    rm -f runtime-po/Makevars
-    sed '
-      /^DOMAIN *=.*/s/=.*/= '"$package"'-runtime/
-      /^subdir *=.*/s/=.*/= runtime-po/
-      /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
-      /^XGETTEXT_OPTIONS *=/{
-        s/$/ \\/
-        a\
-            '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
-      }
-    ' po/Makevars.template >runtime-po/Makevars \
-    || die 'cannot generate runtime-po/Makevars'
-
-    # Copy identical files from po to runtime-po.
-    (cd po && cp -p Makefile.in.in *-quot *.header *.sed *.sin ../runtime-po)
-  fi
-fi
-
-bootstrap_epilogue
-
-echo "$0: done.  Now you can run './configure'."
-
-# ----------------------------------------------------------------------------
-
-# Local Variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:
diff --git a/autopull.sh b/autopull.sh
deleted file mode 100755
index 249bec9c..00000000
--- a/autopull.sh
+++ /dev/null
@@ -1,273 +0,0 @@
-#!/bin/sh
-# Convenience script for fetching auxiliary files that are omitted from
-# the version control repository of this package.
-
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as build-aux/autopull.sh in gnulib.  However,
-# to be useful to your package, you should place a copy of it under
-# version control in the top-level directory of your package.  The
-# intent is that all customization can be done with a bootstrap.conf
-# file also maintained in your version control; gnulib comes with a
-# template build-aux/bootstrap.conf to get you started.
-#
-# Alternatively, you can use an autopull.sh script that is specific
-# to your package.
-
-scriptversion=2022-07-24.15; # UTC
-
-me="$0"
-medir=`dirname "$me"`
-
-# Read the function library and the configuration.
-. "$medir"/bootstrap-funclib.sh
-
-# Ensure that CDPATH is not set.  Otherwise, the output from cd
-# would cause trouble in at least one use below.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
-
-usage() {
-  cat <<EOF
-Usage: $me [OPTION]...
-Bootstrap this package from the checked-out sources.
-
-Optional environment variables:
-  GNULIB_SRCDIR            Specifies the local directory where gnulib
-                           sources reside.  Use this if you already
-                           have gnulib sources on your machine, and
-                           you want to use these sources.
-  GNULIB_REFDIR            Specifies the local directory where a gnulib
-                           repository (with a .git subdirectory) resides.
-                           Use this if you already have gnulib sources
-                           and history on your machine, and do not want
-                           to waste your bandwidth downloading them again.
-  GNULIB_URL               Cloneable URL of the gnulib repository.
-
-Options:
-  --bootstrap-sync         if this bootstrap script is not identical to
-                           the version in the local gnulib sources,
-                           update this script, and then restart it with
-                           /bin/sh or the shell \$CONFIG_SHELL
-  --no-bootstrap-sync      do not check whether bootstrap is out of sync
-  --force                  attempt to bootstrap even if the sources seem
-                           not to have been checked out
-  --no-git                 do not use git to update gnulib.  Requires that
-                           \$GNULIB_SRCDIR or the --gnulib-srcdir option
-                           points to a gnulib repository with the correct
-                           revision
-  --skip-po                do not download po files
-EOF
-  bootstrap_print_option_usage_hook
-  cat <<EOF
-If the file bootstrap.conf exists in the same directory as this script, its
-contents are read as shell variables to configure the bootstrap.
-
-For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
-are honored.
-
-Gnulib sources can be fetched in various ways:
-
- * If the environment variable GNULIB_SRCDIR is set (either as an
-   environment variable or via the --gnulib-srcdir option), then sources
-   are fetched from that local directory.  If it is a git repository and
-   the configuration variable GNULIB_REVISION is set in bootstrap.conf,
-   then that revision is checked out.
-
- * Otherwise, if this package is in a git repository with a 'gnulib'
-   submodule configured, then that submodule is initialized and updated
-   and sources are fetched from there.  If GNULIB_REFDIR is set (either
-   as an environment variable or via the --gnulib-refdir option) and is
-   a git repository, then it is used as a reference.
-
- * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources
-   are cloned into that directory using git from \$GNULIB_URL, defaulting
-   to $default_gnulib_url.
-   If the configuration variable GNULIB_REVISION is set in bootstrap.conf,
-   then that revision is checked out.
-
- * Otherwise, the existing Gnulib sources in the 'gnulib' directory are
-   used.  If it is a git repository and the configuration variable
-   GNULIB_REVISION is set in bootstrap.conf, then that revision is
-   checked out.
-
-If you maintain a package and want to pin a particular revision of the
-Gnulib sources that has been tested with your package, then there are
-two possible approaches: either configure a 'gnulib' submodule with the
-appropriate revision, or set GNULIB_REVISION (and if necessary
-GNULIB_URL) in bootstrap.conf.
-
-Running without arguments will suffice in most cases.
-EOF
-}
-
-# Parse options.
-
-# Use git to update gnulib sources
-use_git=true
-
-for option
-do
-  case $option in
-  --help)
-    usage
-    exit;;
-  --version)
-    set -e
-    echo "autopull.sh $scriptversion"
-    echo "$copyright"
-    exit 0
-    ;;
-  --skip-po)
-    SKIP_PO=t;;
-  --force)
-    checkout_only_file=;;
-  --bootstrap-sync)
-    bootstrap_sync=true;;
-  --no-bootstrap-sync)
-    bootstrap_sync=false;;
-  --no-git)
-    use_git=false;;
-  *)
-    bootstrap_option_hook $option || die "$option: unknown option";;
-  esac
-done
-
-$use_git || test -n "$GNULIB_SRCDIR" \
-  || die "Error: --no-git requires \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option"
-test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
-  || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option is specified, but does not denote a directory"
-
-if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
-  die "Running this script from a non-checked-out distribution is risky."
-fi
-
-check_build_prerequisites $use_git
-
-if $use_gnulib || $bootstrap_sync; then
-  prepare_GNULIB_SRCDIR
-  if $bootstrap_sync; then
-    upgrade_bootstrap
-  fi
-fi
-
-# Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
-# Also find the compatible sha1 utility on the BSDs
-if test x"$SKIP_PO" = x; then
-  find_tool SHA1SUM sha1sum gsha1sum shasum sha1
-fi
-
-# See if we can use gnulib's git-merge-changelog merge driver.
-if $use_git && test -d .git && check_exists git; then
-  if git config merge.merge-changelog.driver >/dev/null ; then
-    :
-  elif check_exists git-merge-changelog; then
-    echo "$0: initializing git-merge-changelog driver"
-    git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
-    git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
-  else
-    echo "$0: consider installing git-merge-changelog from gnulib"
-  fi
-fi
-
-# ----------------------------- Get translations. -----------------------------
-
-download_po_files() {
-  subdir=$1
-  domain=$2
-  echo "$me: getting translations into $subdir for $domain..."
-  cmd=$(printf "$po_download_command_format" "$subdir" "$domain")
-  eval "$cmd"
-}
-
-# Mirror .po files to $po_dir/.reference and copy only the new
-# or modified ones into $po_dir.  Also update $po_dir/LINGUAS.
-# Note po files that exist locally only are left in $po_dir but will
-# not be included in LINGUAS and hence will not be distributed.
-update_po_files() {
-  # Directory containing primary .po files.
-  # Overwrite them only when we're sure a .po file is new.
-  po_dir=$1
-  domain=$2
-
-  # Mirror *.po files into this dir.
-  # Usually contains *.s1 checksum files.
-  ref_po_dir="$po_dir/.reference"
-
-  test -d $ref_po_dir || mkdir $ref_po_dir || return
-  download_po_files $ref_po_dir $domain \
-    && ls "$ref_po_dir"/*.po 2>/dev/null |
-      sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS" || return
-
-  langs=$(cd $ref_po_dir && echo *.po | sed 's/\.po//g')
-  test "$langs" = '*' && langs=x
-  for po in $langs; do
-    case $po in x) continue;; esac
-    new_po="$ref_po_dir/$po.po"
-    cksum_file="$ref_po_dir/$po.s1"
-    if ! test -f "$cksum_file" ||
-        ! test -f "$po_dir/$po.po" ||
-        ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
-      echo "$me: updated $po_dir/$po.po..."
-      cp "$new_po" "$po_dir/$po.po" \
-          && $SHA1SUM < "$new_po" > "$cksum_file" || return
-    fi
-  done
-}
-
-case $SKIP_PO in
-'')
-  if test -d po; then
-    update_po_files po $package || exit
-  fi
-
-  if test -d runtime-po; then
-    update_po_files runtime-po $package-runtime || exit
-  fi;;
-esac
-
-# -----------------------------------------------------------------------------
-
-bootstrap_post_pull_hook \
-  || die "bootstrap_post_pull_hook failed"
-
-# Don't proceed if there are uninitialized submodules.  In particular,
-# autogen.sh will remove dangling links, which might be links into
-# uninitialized submodules.
-# But it's OK if the 'gnulib' submodule is uninitialized, as long as
-# GNULIB_SRCDIR is set.
-if $use_git; then
-  # Uninitialized submodules are listed with an initial dash.
-  uninitialized=`git submodule | grep '^-' | awk '{ print $2 }'`
-  if test -n "$GNULIB_SRCDIR"; then
-    uninitialized=`echo "$uninitialized" | grep -v '^gnulib$'`
-  fi
-  if test -n "$uninitialized"; then
-    die "Some git submodules are not initialized: "`echo "$uninitialized" | tr '\n' ',' | sed -e 's|,$|.|'`" Either use option '--no-git', or run 'git submodule update --init' and bootstrap again."
-  fi
-fi
-
-echo "$0: done.  Now you can run './autogen.sh'."
-
-# ----------------------------------------------------------------------------
-
-# Local Variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:
diff --git a/bootstrap b/bootstrap
index bfe03a48..c6c4901d 100755
--- a/bootstrap
+++ b/bootstrap
@@ -1,6 +1,44 @@
 #! /bin/sh
+# DO NOT EDIT! GENERATED AUTOMATICALLY!
+
 # Bootstrap this package from checked-out sources.
 
+scriptversion=2022-12-27.07; # UTC
+
+# Copyright (C) 2003-2023 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Originally written by Paul Eggert.  The canonical version of this
+# script is maintained as top/bootstrap in gnulib. However, to be
+# useful to your package, you should place a copy of it under version
+# control in the top-level directory of your package.  The intent is
+# that all customization can be done with a bootstrap.conf file also
+# maintained in your version control; gnulib comes with a template
+# build-aux/bootstrap.conf to get you started.
+
+# Please report bugs or propose patches to bug-gnulib@gnu.org.
+
+me="$0"
+medir=`dirname "$me"`
+
+# Read the function library and the configuration.
+
+# A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
+
+scriptlibversion=2023-01-06.19; # UTC
+
 # Copyright (C) 2003-2023 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
@@ -17,22 +55,1273 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 # Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as build-aux/bootstrap in gnulib. However,
+# script is maintained as top/bootstrap-funclib.sh in gnulib.  However,
 # to be useful to your package, you should place a copy of it under
 # version control in the top-level directory of your package.  The
 # intent is that all customization can be done with a bootstrap.conf
 # file also maintained in your version control; gnulib comes with a
 # template build-aux/bootstrap.conf to get you started.
 
-# Please report bugs or propose patches to bug-gnulib@gnu.org.
+nl='
+'
 
-scriptversion=2022-07-24.15; # UTC
+# Ensure file names are sorted consistently across platforms.
+LC_ALL=C
+export LC_ALL
 
-me="$0"
-medir=`dirname "$me"`
+# Honor $PERL, but work even if there is none.
+PERL="${PERL-perl}"
 
-# Read the function library and the configuration.
-. "$medir"/bootstrap-funclib.sh
+default_gnulib_url=https://git.savannah.gnu.org/git/gnulib.git
+
+# Copyright year, for the --version output.
+copyright_year=`echo "$scriptlibversion" | sed -e 's/[^0-9].*//'`
+copyright="Copyright (C) ${copyright_year} Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law."
+
+# warnf_ FORMAT-STRING ARG1...
+warnf_ ()
+{
+  warnf_format_=$1
+  shift
+  nl='
+'
+  case $* in
+    *$nl*) me_=$(printf "$me"|tr "$nl|" '??')
+       printf "$warnf_format_" "$@" | sed "s|^|$me_: |" ;;
+    *) printf "$me: $warnf_format_" "$@" ;;
+  esac >&2
+}
+
+# warn_ WORD1...
+warn_ ()
+{
+  # If IFS does not start with ' ', set it and emit the warning in a subshell.
+  case $IFS in
+    ' '*) warnf_ '%s\n' "$*";;
+    *)    (IFS=' '; warn_ "$@");;
+  esac
+}
+
+# die WORD1...
+die() { warn_ "$@"; exit 1; }
+
+# ------------------------------ Configuration. ------------------------------
+
+# Directory that contains package-specific gnulib modules and/or overrides.
+local_gl_dir=gl
+
+# Name of the Makefile.am
+# XXX Not used.
+gnulib_mk=gnulib.mk
+
+# List of gnulib modules needed.
+gnulib_modules=
+
+# Any gnulib files needed that are not in modules.
+gnulib_files=
+
+# A function to be called for each unrecognized option.  Returns 0 if
+# the option in $1 has been processed by the function.  Returns 1 if
+# the option has not been processed by the function.  Override it via
+# your own definition in bootstrap.conf
+bootstrap_option_hook() { return 1; }
+
+# A function to be called in order to print the --help information
+# corresponding to user-defined command-line options.
+bootstrap_print_option_usage_hook() { :; }
+
+# A function to be called at the end of autopull.sh.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_post_pull_hook() { :; }
+
+# A function to be called right after gnulib-tool is run.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_post_import_hook() { :; }
+
+# A function to be called after everything else in this script.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_epilogue() { :; }
+
+# The command to download all .po files for a specified domain into a
+# specified directory.  Fill in the first %s with the destination
+# directory and the second with the domain name.
+po_download_command_format=\
+"wget --mirror --level=1 -nd -nv -A.po -P '%s' \
+ https://translationproject.org/latest/%s/"
+
+# Prefer a non-empty tarname (4th argument of AC_INIT if given), else
+# fall back to the package name (1st argument with munging).
+extract_package_name='
+  /^AC_INIT(\[*/{
+     s///
+     /^[^,]*,[^,]*,[^,]*,[ []*\([^][ ,)]\)/{
+       s//\1/
+       s/[],)].*//
+       p
+       q
+     }
+     s/[],)].*//
+     s/^GNU //
+     y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
+     s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
+     p
+  }
+'
+package=$(${AUTOCONF:-autoconf} --trace AC_INIT:\$4 configure.ac 2>/dev/null)
+if test -z "$package"; then
+  package=$(sed -n "$extract_package_name" configure.ac) \
+      || die 'cannot find package name in configure.ac'
+fi
+gnulib_name=lib$package
+
+build_aux=build-aux
+source_base=lib
+m4_base=m4
+doc_base=doc
+tests_base=tests
+gnulib_extra_files="
+        build-aux/install-sh
+        build-aux/mdate-sh
+        build-aux/texinfo.tex
+        build-aux/depcomp
+        build-aux/config.guess
+        build-aux/config.sub
+        doc/INSTALL
+"
+
+# Additional gnulib-tool options to use.  Use "\newline" to break lines.
+gnulib_tool_option_extras=
+
+# Other locale categories that need message catalogs.
+EXTRA_LOCALE_CATEGORIES=
+
+# Additional xgettext options to use.  Use "\\\newline" to break lines.
+XGETTEXT_OPTIONS='\\\
+ --flag=_:1:pass-c-format\\\
+ --flag=N_:1:pass-c-format\\\
+ --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
+'
+
+# Package bug report address and copyright holder for gettext files
+COPYRIGHT_HOLDER='Free Software Foundation, Inc.'
+MSGID_BUGS_ADDRESS=bug-$package@gnu.org
+
+# Files we don't want to import.
+# XXX Not used.
+excluded_files=
+
+# File that should exist in the top directory of a checked out hierarchy,
+# but not in a distribution tarball.
+checkout_only_file=README-hacking
+
+# Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
+# those files to be generated in directories like lib/, m4/, and po/.
+# Or set it to 'auto' to make this script select which to use based
+# on which version control system (if any) is used in the source directory.
+vc_ignore=auto
+
+# Set this to true in bootstrap.conf to enable --bootstrap-sync by
+# default.
+bootstrap_sync=false
+
+# Override the default configuration, if necessary.
+# Make sure that bootstrap.conf is sourced from the current directory
+# if we were invoked as "sh bootstrap".
+conffile=`dirname "$me"`/bootstrap.conf
+test -r "$conffile" && . "$conffile"
+
+# ------------------------- Build-time prerequisites -------------------------
+
+check_exists() {
+  if test "$1" = "--verbose"; then
+    ($2 --version </dev/null) >/dev/null 2>&1
+    if test $? -ge 126; then
+      # If not found, run with diagnostics as one may be
+      # presented with env variables to set to find the right version
+      ($2 --version </dev/null)
+    fi
+  else
+    ($1 --version </dev/null) >/dev/null 2>&1
+  fi
+
+  test $? -lt 126
+}
+
+# Note this deviates from the version comparison in automake
+# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
+# but this should suffice as we won't be specifying old
+# version formats or redundant trailing .0 in bootstrap.conf.
+# If we did want full compatibility then we should probably
+# use m4_version_compare from autoconf.
+sort_ver() { # sort -V is not generally available
+  ver1="$1"
+  ver2="$2"
+
+  # split on '.' and compare each component
+  i=1
+  while : ; do
+    p1=$(echo "$ver1" | cut -d. -f$i)
+    p2=$(echo "$ver2" | cut -d. -f$i)
+    if [ ! "$p1" ]; then
+      echo "$1 $2"
+      break
+    elif [ ! "$p2" ]; then
+      echo "$2 $1"
+      break
+    elif [ ! "$p1" = "$p2" ]; then
+      if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
+        echo "$2 $1"
+      elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
+        echo "$1 $2"
+      else # numeric, then lexicographic comparison
+        lp=$(printf "%s\n%s\n" "$p1" "$p2" | LANG=C sort -n | tail -n1)
+        if [ "$lp" = "$p2" ]; then
+          echo "$1 $2"
+        else
+          echo "$2 $1"
+        fi
+      fi
+      break
+    fi
+    i=$(($i+1))
+  done
+}
+
+get_version_sed='
+# Move version to start of line.
+s/.*[v ]\([0-9]\)/\1/
+
+# Skip lines that do not start with version.
+/^[0-9]/!d
+
+# Remove characters after the version.
+s/[^.a-z0-9-].*//
+
+# The first component must be digits only.
+s/^\([0-9]*\)[a-z-].*/\1/
+
+#the following essentially does s/5.005/5.5/
+s/\.0*\([1-9]\)/.\1/g
+p
+q'
+
+get_version() {
+  app=$1
+
+  $app --version >/dev/null 2>&1 || { $app --version; return 1; }
+
+  $app --version 2>&1 | sed -n "$get_version_sed"
+}
+
+check_versions() {
+  ret=0
+
+  while read app req_ver; do
+    # We only need libtoolize from the libtool package.
+    if test "$app" = libtool; then
+      app=libtoolize
+    fi
+    # Exempt git if git is not needed.
+    if test "$app" = git; then
+      $check_git || continue
+    fi
+    # Honor $APP variables ($TAR, $AUTOCONF, etc.)
+    appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
+    test "$appvar" = TAR && appvar=AMTAR
+    case $appvar in
+        GZIP) ;; # Do not use $GZIP:  it contains gzip options.
+        PERL::*) ;; # Keep perl modules as-is
+        *) eval "app=\${$appvar-$app}" ;;
+    esac
+
+    # Handle the still-experimental Automake-NG programs specially.
+    # They remain named as the mainstream Automake programs ("automake",
+    # and "aclocal") to avoid gratuitous incompatibilities with
+    # pre-existing usages (by, say, autoreconf, or custom autogen.sh
+    # scripts), but correctly identify themselves (as being part of
+    # "GNU automake-ng") when asked their version.
+    case $app in
+      automake-ng|aclocal-ng)
+        app=${app%-ng}
+        ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
+          warn_ "Error: '$app' not found or not from Automake-NG"
+          ret=1
+          continue
+        } ;;
+      # Another check is for perl modules.  These can be written as
+      # e.g. perl::XML::XPath in case of XML::XPath module, etc.
+      perl::*)
+        # Extract module name
+        app="${app#perl::}"
+        if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
+          warn_ "Error: perl module '$app' not found"
+          ret=1
+        fi
+        continue
+        ;;
+    esac
+    if [ "$req_ver" = "-" ]; then
+      # Merely require app to exist; not all prereq apps are well-behaved
+      # so we have to rely on $? rather than get_version.
+      if ! check_exists --verbose $app; then
+        warn_ "Error: '$app' not found"
+        ret=1
+      fi
+    else
+      # Require app to produce a new enough version string.
+      inst_ver=$(get_version $app)
+      if [ ! "$inst_ver" ]; then
+        warn_ "Error: '$app' not found"
+        ret=1
+      else
+        latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
+        if [ ! "$latest_ver" = "$inst_ver" ]; then
+          warnf_ '%s\n'                                        \
+              "Error: '$app' version == $inst_ver is too old"  \
+              "       '$app' version >= $req_ver is required"
+          ret=1
+        fi
+      fi
+    fi
+  done
+
+  return $ret
+}
+
+print_versions() {
+  echo "Program    Min_version"
+  echo "----------------------"
+  printf %s "$buildreq"
+  echo "----------------------"
+  # can't depend on column -t
+}
+
+# check_build_prerequisites check_git
+check_build_prerequisites()
+{
+  check_git="$1"
+
+  # gnulib-tool requires at least automake and autoconf.
+  # If either is not listed, add it (with minimum version) as a prerequisite.
+  case $buildreq in
+    *automake*) ;;
+    *) buildreq="automake 1.9
+$buildreq" ;;
+  esac
+  case $buildreq in
+    *autoconf*) ;;
+    *) buildreq="autoconf 2.59
+$buildreq" ;;
+  esac
+
+  # When we can deduce that gnulib-tool will require patch,
+  # and when patch is not already listed as a prerequisite, add it, too.
+  if test -d "$local_gl_dir" \
+     && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
+    case $buildreq in
+      *patch*) ;;
+      *) buildreq="patch -
+$buildreq" ;;
+    esac
+  fi
+
+  if ! printf '%s' "$buildreq" | check_versions; then
+    echo >&2
+    if test -f README-prereq; then
+      die "See README-prereq for how to get the prerequisite programs"
+    else
+      die "Please install the prerequisite programs"
+    fi
+  fi
+
+  # Warn the user if autom4te appears to be broken; this causes known
+  # issues with at least gettext 0.18.3.
+  probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
+  if test "x$probe" != xhi; then
+    warn_ "WARNING: your autom4te wrapper eats stdin;"
+    warn_ "if bootstrap fails, consider upgrading your autotools"
+  fi
+}
+
+# find_tool ENVVAR NAMES...
+# -------------------------
+# Search for a required program.  Use the value of ENVVAR, if set,
+# otherwise find the first of the NAMES that can be run.
+# If found, set ENVVAR to the program name, die otherwise.
+#
+# FIXME: code duplication, see also gnu-web-doc-update.
+find_tool ()
+{
+  find_tool_envvar=$1
+  shift
+  find_tool_names=$@
+  eval "find_tool_res=\$$find_tool_envvar"
+  if test x"$find_tool_res" = x; then
+    for i; do
+      if check_exists $i; then
+        find_tool_res=$i
+        break
+      fi
+    done
+  fi
+  if test x"$find_tool_res" = x; then
+    warn_ "one of these is required: $find_tool_names;"
+    die   "alternatively set $find_tool_envvar to a compatible tool"
+  fi
+  eval "$find_tool_envvar=\$find_tool_res"
+  eval "export $find_tool_envvar"
+}
+
+# --------------------- Preparing GNULIB_SRCDIR for use. ---------------------
+# This is part of autopull.sh, but bootstrap needs it too, for self-upgrading.
+
+cleanup_gnulib() {
+  status=$?
+  # XXX It's a bad idea to erase the submodule directory if it contains local
+  #     modifications.
+  rm -fr "$gnulib_path"
+  exit $status
+}
+
+git_modules_config () {
+  test -f .gitmodules && git config --file .gitmodules "$@"
+}
+
+prepare_GNULIB_SRCDIR ()
+{
+  if test -n "$GNULIB_SRCDIR"; then
+    # Use GNULIB_SRCDIR directly.
+    # We already checked that $GNULIB_SRCDIR references a directory.
+    # Verify that it contains a gnulib checkout.
+    test -f "$GNULIB_SRCDIR/gnulib-tool" \
+      || die "Error: --gnulib-srcdir or \$GNULIB_SRCDIR is specified, but does not contain gnulib-tool"
+  elif $use_git; then
+    gnulib_path=$(git_modules_config submodule.gnulib.path)
+    test -z "$gnulib_path" && gnulib_path=gnulib
+
+    # Get gnulib files.  Populate $gnulib_path, possibly updating a
+    # submodule, for use in the rest of the script.
+
+    if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git \
+       && git_modules_config submodule.gnulib.url >/dev/null; then
+      # Use GNULIB_REFDIR as a reference.
+      echo "$0: getting gnulib files..."
+      if git submodule -h|grep -- --reference > /dev/null; then
+        # Prefer the one-liner available in git 1.6.4 or newer.
+        git submodule update --init --reference "$GNULIB_REFDIR" \
+          "$gnulib_path" || exit $?
+      else
+        # This fallback allows at least git 1.5.5.
+        if test -f "$gnulib_path"/gnulib-tool; then
+          # Since file already exists, assume submodule init already complete.
+          git submodule update -- "$gnulib_path" || exit $?
+        else
+          # Older git can't clone into an empty directory.
+          rmdir "$gnulib_path" 2>/dev/null
+          git clone --reference "$GNULIB_REFDIR" \
+            "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
+            && git submodule init -- "$gnulib_path" \
+            && git submodule update -- "$gnulib_path" \
+            || exit $?
+        fi
+      fi
+    else
+      # GNULIB_REFDIR is not set or not usable. Ignore it.
+      if git_modules_config submodule.gnulib.url >/dev/null; then
+        echo "$0: getting gnulib files..."
+        git submodule init -- "$gnulib_path" || exit $?
+        git submodule update -- "$gnulib_path" || exit $?
+
+      elif [ ! -d "$gnulib_path" ]; then
+        echo "$0: getting gnulib files..."
+
+        trap cleanup_gnulib HUP INT PIPE TERM
+
+        shallow=
+        if test -z "$GNULIB_REVISION"; then
+          if git clone -h 2>&1 | grep -- --depth > /dev/null; then
+            shallow='--depth 2'
+          fi
+          git clone $shallow ${GNULIB_URL:-$default_gnulib_url} "$gnulib_path" \
+            || cleanup_gnulib
+        else
+          if git fetch -h 2>&1 | grep -- --depth > /dev/null; then
+            shallow='--depth 2'
+          fi
+          mkdir -p "$gnulib_path"
+          # Only want a shallow checkout of $GNULIB_REVISION, but git does not
+          # support cloning by commit hash. So attempt a shallow fetch by commit
+          # hash to minimize the amount of data downloaded and changes needed to
+          # be processed, which can drastically reduce download and processing
+          # time for checkout. If the fetch by commit fails, a shallow fetch can
+          # not be performed because we do not know what the depth of the commit
+          # is without fetching all commits. So fallback to fetching all commits.
+          git -C "$gnulib_path" init
+          git -C "$gnulib_path" remote add origin \
+              ${GNULIB_URL:-$default_gnulib_url}
+          git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION" \
+            || git -C "$gnulib_path" fetch origin \
+            || cleanup_gnulib
+          git -C "$gnulib_path" reset --hard FETCH_HEAD
+        fi
+
+        trap - HUP INT PIPE TERM
+      fi
+    fi
+    GNULIB_SRCDIR=$gnulib_path
+    # Verify that the submodule contains a gnulib checkout.
+    test -f "$gnulib_path/gnulib-tool" \
+      || die "Error: $gnulib_path is supposed to contain a gnulib checkout, but does not contain gnulib-tool"
+  fi
+
+  # XXX Should this be done if $use_git is false?
+  if test -d "$GNULIB_SRCDIR"/.git && test -n "$GNULIB_REVISION" \
+     && ! git_modules_config submodule.gnulib.url >/dev/null; then
+    (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
+  fi
+
+  # $GNULIB_SRCDIR now points to the version of gnulib to use, and
+  # we no longer need to use git or $gnulib_path below here.
+}
+
+# -------- Upgrading bootstrap to the version found in GNULIB_SRCDIR. --------
+
+upgrade_bootstrap ()
+{
+  if test -f "$medir"/bootstrap-funclib.sh; then
+    update_lib=true
+    { cmp -s "$medir"/bootstrap "$GNULIB_SRCDIR/top/bootstrap" \
+      && cmp -s "$medir"/bootstrap-funclib.sh "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" \
+      && cmp -s "$medir"/autopull.sh "$GNULIB_SRCDIR/top/autopull.sh" \
+      && cmp -s "$medir"/autogen.sh "$GNULIB_SRCDIR/top/autogen.sh"; \
+    }
+  else
+    update_lib=false
+    cmp -s "$medir"/bootstrap "$GNULIB_SRCDIR/build-aux/bootstrap"
+  fi || {
+    if $update_lib; then
+      echo "$0: updating bootstrap & companions and restarting..."
+    else
+      echo "$0: updating bootstrap and restarting..."
+    fi
+    case $(sh -c 'echo "$1"' -- a) in
+      a) ignored=--;;
+      *) ignored=ignored;;
+    esac
+    exec sh -c \
+      '{ if '$update_lib' && test -f "$1"; then cp "$1" "$3"; else cp "$2" "$3"; fi; } && { if '$update_lib' && test -f "$4"; then cp "$4" "$5"; else rm -f "$5"; fi; } && { if '$update_lib' && test -f "$6"; then cp "$6" "$7"; else rm -f "$7"; fi; } && { if '$update_lib' && test -f "$8"; then cp "$8" "$9"; else rm -f "$9"; fi; } && shift && shift && shift && shift && shift && shift && shift && shift && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
+      $ignored \
+      "$GNULIB_SRCDIR/top/bootstrap" "$GNULIB_SRCDIR/build-aux/bootstrap" "$medir/bootstrap" \
+      "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" "$medir/bootstrap-funclib.sh" \
+      "$GNULIB_SRCDIR/top/autopull.sh" "$medir/autopull.sh" \
+      "$GNULIB_SRCDIR/top/autogen.sh" "$medir/autogen.sh" \
+      "$0" "$@" --no-bootstrap-sync
+  }
+}
+
+# ----------------------------------------------------------------------------
+
+if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
+  use_gnulib=false
+else
+  use_gnulib=true
+fi
+
+# -------- Fetch auxiliary files from the network.  --------------------------
+
+autopull_usage() {
+  cat <<EOF
+Usage: $me [OPTION]...
+Bootstrap this package from the checked-out sources.
+
+Optional environment variables:
+  GNULIB_SRCDIR            Specifies the local directory where gnulib
+                           sources reside.  Use this if you already
+                           have gnulib sources on your machine, and
+                           you want to use these sources.
+  GNULIB_REFDIR            Specifies the local directory where a gnulib
+                           repository (with a .git subdirectory) resides.
+                           Use this if you already have gnulib sources
+                           and history on your machine, and do not want
+                           to waste your bandwidth downloading them again.
+  GNULIB_URL               Cloneable URL of the gnulib repository.
+
+Options:
+  --bootstrap-sync         if this bootstrap script is not identical to
+                           the version in the local gnulib sources,
+                           update this script, and then restart it with
+                           /bin/sh or the shell \$CONFIG_SHELL
+  --no-bootstrap-sync      do not check whether bootstrap is out of sync
+  --force                  attempt to bootstrap even if the sources seem
+                           not to have been checked out
+  --no-git                 do not use git to update gnulib.  Requires that
+                           \$GNULIB_SRCDIR or the --gnulib-srcdir option
+                           points to a gnulib repository with the correct
+                           revision
+  --skip-po                do not download po files
+EOF
+  bootstrap_print_option_usage_hook
+  cat <<EOF
+If the file bootstrap.conf exists in the same directory as this script, its
+contents are read as shell variables to configure the bootstrap.
+
+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
+Gnulib sources can be fetched in various ways:
+
+ * If the environment variable GNULIB_SRCDIR is set (either as an
+   environment variable or via the --gnulib-srcdir option), then sources
+   are fetched from that local directory.  If it is a git repository and
+   the configuration variable GNULIB_REVISION is set in bootstrap.conf,
+   then that revision is checked out.
+
+ * Otherwise, if this package is in a git repository with a 'gnulib'
+   submodule configured, then that submodule is initialized and updated
+   and sources are fetched from there.  If GNULIB_REFDIR is set (either
+   as an environment variable or via the --gnulib-refdir option) and is
+   a git repository, then it is used as a reference.
+
+ * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources
+   are cloned into that directory using git from \$GNULIB_URL, defaulting
+   to $default_gnulib_url.
+   If the configuration variable GNULIB_REVISION is set in bootstrap.conf,
+   then that revision is checked out.
+
+ * Otherwise, the existing Gnulib sources in the 'gnulib' directory are
+   used.  If it is a git repository and the configuration variable
+   GNULIB_REVISION is set in bootstrap.conf, then that revision is
+   checked out.
+
+If you maintain a package and want to pin a particular revision of the
+Gnulib sources that has been tested with your package, then there are
+two possible approaches: either configure a 'gnulib' submodule with the
+appropriate revision, or set GNULIB_REVISION (and if necessary
+GNULIB_URL) in bootstrap.conf.
+
+Running without arguments will suffice in most cases.
+EOF
+}
+
+# Fetch auxiliary files that are omitted from the version control
+# repository of this package.
+autopull()
+{
+  # Ensure that CDPATH is not set.  Otherwise, the output from cd
+  # would cause trouble in at least one use below.
+  (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+  # Parse options.
+
+  # Use git to update gnulib sources
+  use_git=true
+
+  for option
+  do
+    case $option in
+    --help)
+      autopull_usage
+      return;;
+    --version)
+      set -e
+      echo "autopull.sh $scriptlibversion"
+      echo "$copyright"
+      return 0
+      ;;
+    --skip-po)
+      SKIP_PO=t;;
+    --force)
+      checkout_only_file=;;
+    --bootstrap-sync)
+      bootstrap_sync=true;;
+    --no-bootstrap-sync)
+      bootstrap_sync=false;;
+    --no-git)
+      use_git=false;;
+    *)
+      bootstrap_option_hook $option || die "$option: unknown option";;
+    esac
+  done
+
+  $use_git || test -n "$GNULIB_SRCDIR" \
+    || die "Error: --no-git requires \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option"
+  test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
+    || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option is specified, but does not denote a directory"
+
+  if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+    die "Running this script from a non-checked-out distribution is risky."
+  fi
+
+  check_build_prerequisites $use_git
+
+  if $use_gnulib || $bootstrap_sync; then
+    prepare_GNULIB_SRCDIR
+    if $bootstrap_sync; then
+      upgrade_bootstrap
+    fi
+  fi
+
+  # Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
+  # Also find the compatible sha1 utility on the BSDs
+  if test x"$SKIP_PO" = x; then
+    find_tool SHA1SUM sha1sum gsha1sum shasum sha1
+  fi
+
+  # See if we can use gnulib's git-merge-changelog merge driver.
+  if $use_git && test -d .git && check_exists git; then
+    if git config merge.merge-changelog.driver >/dev/null ; then
+      :
+    elif check_exists git-merge-changelog; then
+      echo "$0: initializing git-merge-changelog driver"
+      git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
+      git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
+    else
+      echo "$0: consider installing git-merge-changelog from gnulib"
+    fi
+  fi
+
+  case $SKIP_PO in
+  '')
+    if test -d po; then
+      update_po_files po $package || return
+    fi
+
+    if test -d runtime-po; then
+      update_po_files runtime-po $package-runtime || return
+    fi;;
+  esac
+
+  # ---------------------------------------------------------------------------
+
+  bootstrap_post_pull_hook \
+    || die "bootstrap_post_pull_hook failed"
+
+  # Don't proceed if there are uninitialized submodules.  In particular,
+  # autogen.sh will remove dangling links, which might be links into
+  # uninitialized submodules.
+  # But it's OK if the 'gnulib' submodule is uninitialized, as long as
+  # GNULIB_SRCDIR is set.
+  if $use_git; then
+    # Uninitialized submodules are listed with an initial dash.
+    uninitialized=`git submodule | grep '^-' | awk '{ print $2 }'`
+    if test -n "$GNULIB_SRCDIR"; then
+      uninitialized=`echo "$uninitialized" | grep -v '^gnulib$'`
+    fi
+    if test -n "$uninitialized"; then
+      die "Some git submodules are not initialized: "`echo "$uninitialized" | tr '\n' ',' | sed -e 's|,$|.|'`" Either use option '--no-git', or run 'git submodule update --init' and bootstrap again."
+    fi
+  fi
+
+  if test -f "$medir"/autogen.sh; then
+    echo "$0: done.  Now you can run '$medir/autogen.sh'."
+  fi
+}
+
+# ----------------------------- Get translations. -----------------------------
+
+download_po_files() {
+  subdir=$1
+  domain=$2
+  echo "$me: getting translations into $subdir for $domain..."
+  cmd=$(printf "$po_download_command_format" "$subdir" "$domain")
+  eval "$cmd"
+}
+
+# Mirror .po files to $po_dir/.reference and copy only the new
+# or modified ones into $po_dir.  Also update $po_dir/LINGUAS.
+# Note po files that exist locally only are left in $po_dir but will
+# not be included in LINGUAS and hence will not be distributed.
+update_po_files() {
+  # Directory containing primary .po files.
+  # Overwrite them only when we're sure a .po file is new.
+  po_dir=$1
+  domain=$2
+
+  # Mirror *.po files into this dir.
+  # Usually contains *.s1 checksum files.
+  ref_po_dir="$po_dir/.reference"
+
+  test -d $ref_po_dir || mkdir $ref_po_dir || return
+  download_po_files $ref_po_dir $domain \
+    && ls "$ref_po_dir"/*.po 2>/dev/null |
+      sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS" || return
+
+  langs=$(cd $ref_po_dir && echo *.po | sed 's/\.po//g')
+  test "$langs" = '*' && langs=x
+  for po in $langs; do
+    case $po in x) continue;; esac
+    new_po="$ref_po_dir/$po.po"
+    cksum_file="$ref_po_dir/$po.s1"
+    if ! test -f "$cksum_file" ||
+        ! test -f "$po_dir/$po.po" ||
+        ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
+      echo "$me: updated $po_dir/$po.po..."
+      cp "$new_po" "$po_dir/$po.po" \
+          && $SHA1SUM < "$new_po" > "$cksum_file" || return
+    fi
+  done
+}
+
+# -------- Generate files automatically from existing sources.  --------------
+
+autogen_usage() {
+  cat <<EOF
+Usage: $me [OPTION]...
+Bootstrap this package from the checked-out sources.
+
+Optional environment variables:
+  GNULIB_SRCDIR            Specifies the local directory where gnulib
+                           sources reside.  Use this if you already
+                           have gnulib sources on your machine, and
+                           you want to use these sources.
+
+Options:
+  --copy                   copy files instead of creating symbolic links
+  --force                  attempt to bootstrap even if the sources seem
+                           not to have been checked out
+EOF
+  bootstrap_print_option_usage_hook
+  cat <<EOF
+If the file bootstrap.conf exists in the same directory as this script, its
+contents are read as shell variables to configure the bootstrap.
+
+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
+Gnulib sources are assumed to be present:
+  * in \$GNULIB_SRCDIR, if that environment variable is set,
+  * otherwise, in the 'gnulib' submodule, if such a submodule is configured,
+  * otherwise, in the 'gnulib' subdirectory.
+
+Running without arguments will suffice in most cases.
+EOF
+}
+
+
+version_controlled_file() {
+  parent=$1
+  file=$2
+  if test -d .git; then
+    git rm -n "$file" > /dev/null 2>&1
+  elif test -d .svn; then
+    svn log -r HEAD "$file" > /dev/null 2>&1
+  elif test -d CVS; then
+    grep -F "/${file##*/}/" "$parent/CVS/Entries" 2>/dev/null |
+             grep '^/[^/]*/[0-9]' > /dev/null
+  else
+    warn_ "no version control for $file?"
+    false
+  fi
+}
+
+# Strip blank and comment lines to leave significant entries.
+gitignore_entries() {
+  sed '/^#/d; /^$/d' "$@"
+}
+
+# If $STR is not already on a line by itself in $FILE, insert it at the start.
+# Entries are inserted at the start of the ignore list to ensure existing
+# entries starting with ! are not overridden.  Such entries support
+# whitelisting exceptions after a more generic blacklist pattern.
+insert_if_absent() {
+  file=$1
+  str=$2
+  test -f $file || touch $file
+  test -r $file || die "Error: failed to read ignore file: $file"
+  duplicate_entries=$(gitignore_entries $file | sort | uniq -d)
+  if [ "$duplicate_entries" ] ; then
+    die "Error: Duplicate entries in $file: " $duplicate_entries
+  fi
+  linesold=$(gitignore_entries $file | wc -l)
+  linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
+  if [ $linesold != $linesnew ] ; then
+    { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
+      || die "insert_if_absent $file $str: failed"
+  fi
+}
+
+# Adjust $PATTERN for $VC_IGNORE_FILE and insert it with
+# insert_if_absent.
+insert_vc_ignore() {
+  vc_ignore_file="$1"
+  pattern="$2"
+  case $vc_ignore_file in
+  *.gitignore)
+    # A .gitignore entry that does not start with '/' applies
+    # recursively to subdirectories, so prepend '/' to every
+    # .gitignore entry.
+    pattern=$(echo "$pattern" | sed s,^,/,);;
+  esac
+  insert_if_absent "$vc_ignore_file" "$pattern"
+}
+
+symlink_to_dir()
+{
+  src=$1/$2
+  dst=${3-$2}
+
+  test -f "$src" && {
+
+    # If the destination directory doesn't exist, create it.
+    # This is required at least for "lib/uniwidth/cjk.h".
+    dst_dir=$(dirname "$dst")
+    if ! test -d "$dst_dir"; then
+      mkdir -p "$dst_dir"
+
+      # If we've just created a directory like lib/uniwidth,
+      # tell version control system(s) it's ignorable.
+      # FIXME: for now, this does only one level
+      parent=$(dirname "$dst_dir")
+      for dot_ig in x $vc_ignore; do
+        test $dot_ig = x && continue
+        ig=$parent/$dot_ig
+        insert_vc_ignore $ig "${dst_dir##*/}"
+      done
+    fi
+
+    if $copy; then
+      {
+        test ! -h "$dst" || {
+          echo "$me: rm -f $dst" &&
+          rm -f "$dst"
+        }
+      } &&
+      test -f "$dst" &&
+      cmp -s "$src" "$dst" || {
+        echo "$me: cp -fp $src $dst" &&
+        cp -fp "$src" "$dst"
+      }
+    else
+      # Leave any existing symlink alone, if it already points to the source,
+      # so that broken build tools that care about symlink times
+      # aren't confused into doing unnecessary builds.  Conversely, if the
+      # existing symlink's timestamp is older than the source, make it afresh,
+      # so that broken tools aren't confused into skipping needed builds.  See
+      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
+      test -h "$dst" &&
+      src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
+      dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
+      test "$src_i" = "$dst_i" &&
+      both_ls=$(ls -dt "$src" "$dst") &&
+      test "X$both_ls" = "X$dst$nl$src" || {
+        dot_dots=
+        case $src in
+        /*) ;;
+        *)
+          case /$dst/ in
+          *//* | */../* | */./* | /*/*/*/*/*/)
+             die "invalid symlink calculation: $src -> $dst";;
+          /*/*/*/*/)    dot_dots=../../../;;
+          /*/*/*/)      dot_dots=../../;;
+          /*/*/)        dot_dots=../;;
+          esac;;
+        esac
+
+        echo "$me: ln -fs $dot_dots$src $dst" &&
+        ln -fs "$dot_dots$src" "$dst"
+      }
+    fi
+  }
+}
+
+# Regenerate all autogeneratable files that are omitted from the
+# version control repository.  In particular, regenerate all
+# aclocal.m4, config.h.in, Makefile.in, configure files with new
+# versions of autoconf or automake.
+autogen()
+{
+  # Ensure that CDPATH is not set.  Otherwise, the output from cd
+  # would cause trouble in at least one use below.
+  (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+  # Environment variables that may be set by the user.
+  : "${AUTOPOINT=autopoint}"
+  : "${AUTORECONF=autoreconf}"
+
+  if test "$vc_ignore" = auto; then
+    vc_ignore=
+    test -d .git && vc_ignore=.gitignore
+    test -d CVS && vc_ignore="$vc_ignore .cvsignore"
+  fi
+
+
+  # Parse options.
+
+  # Whether to use copies instead of symlinks.
+  copy=false
+
+  for option
+  do
+    case $option in
+    --help)
+      autogen_usage
+      return;;
+    --version)
+      set -e
+      echo "autogen.sh $scriptlibversion"
+      echo "$copyright"
+      return 0
+      ;;
+    --force)
+      checkout_only_file=;;
+    --copy)
+      copy=true;;
+    *)
+      bootstrap_option_hook $option || die "$option: unknown option";;
+    esac
+  done
+
+  test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
+    || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option is specified, but does not denote a directory"
+
+  if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+    die "Running this script from a non-checked-out distribution is risky."
+  fi
+
+  if $use_gnulib; then
+    if test -z "$GNULIB_SRCDIR"; then
+      gnulib_path=$(test -f .gitmodules && git config --file .gitmodules submodule.gnulib.path)
+      test -z "$gnulib_path" && gnulib_path=gnulib
+      GNULIB_SRCDIR=$gnulib_path
+    fi
+  fi
+
+  # Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
+  found_aux_dir=no
+  grep '^[	 ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'])' configure.ac \
+      >/dev/null && found_aux_dir=yes
+  grep '^[	 ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
+      >/dev/null && found_aux_dir=yes
+  test $found_aux_dir = yes \
+    || die "configure.ac lacks 'AC_CONFIG_AUX_DIR([$build_aux])'; add it"
+
+  # If $build_aux doesn't exist, create it now, otherwise some bits
+  # below will malfunction.  If creating it, also mark it as ignored.
+  if test ! -d $build_aux; then
+    mkdir $build_aux
+    for dot_ig in x $vc_ignore; do
+      test $dot_ig = x && continue
+      insert_vc_ignore $dot_ig $build_aux
+    done
+  fi
+
+  check_build_prerequisites false
+
+  use_libtool=0
+  # We'd like to use grep -E, to see if any of LT_INIT,
+  # AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
+  # but that's not portable enough (e.g., for Solaris).
+  grep '^[	 ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
+    && use_libtool=1
+  grep '^[	 ]*LT_INIT' configure.ac >/dev/null \
+    && use_libtool=1
+  if test $use_libtool = 1; then
+    find_tool LIBTOOLIZE glibtoolize libtoolize
+  fi
+
+  if $use_gnulib; then
+    gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
+    <$gnulib_tool || return
+  fi
+
+  # NOTE: we have to be careful to run both autopoint and libtoolize
+  # before gnulib-tool, since gnulib-tool is likely to provide newer
+  # versions of files "installed" by these two programs.
+  # Then, *after* gnulib-tool (see below), we have to be careful to
+  # run autoreconf in such a way that it does not run either of these
+  # two just-pre-run programs.
+
+  # Import from gettext.
+  with_gettext=yes
+  grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
+      with_gettext=no
+
+  if test $with_gettext = yes || test $use_libtool = 1; then
+
+    tempbase=.bootstrap$$
+    trap "rm -f $tempbase.0 $tempbase.1" HUP INT PIPE TERM
+
+    > $tempbase.0 > $tempbase.1 &&
+    find . ! -type d -print | sort > $tempbase.0 || return
+
+    if test $with_gettext = yes; then
+      # Released autopoint has the tendency to install macros that have been
+      # obsoleted in current gnulib, so run this before gnulib-tool.
+      echo "$0: $AUTOPOINT --force"
+      $AUTOPOINT --force || return
+    fi
+
+    # Autoreconf runs aclocal before libtoolize, which causes spurious
+    # warnings if the initial aclocal is confused by the libtoolized
+    # (or worse out-of-date) macro directory.
+    # libtoolize 1.9b added the --install option; but we support back
+    # to libtoolize 1.5.22, where the install action was default.
+    if test $use_libtool = 1; then
+      install=
+      case $($LIBTOOLIZE --help) in
+        *--install*) install=--install ;;
+      esac
+      echo "running: $LIBTOOLIZE $install --copy"
+      $LIBTOOLIZE $install --copy
+    fi
+
+    find . ! -type d -print | sort >$tempbase.1
+    old_IFS=$IFS
+    IFS=$nl
+    for file in $(comm -13 $tempbase.0 $tempbase.1); do
+      IFS=$old_IFS
+      parent=${file%/*}
+      version_controlled_file "$parent" "$file" || {
+        for dot_ig in x $vc_ignore; do
+          test $dot_ig = x && continue
+          ig=$parent/$dot_ig
+          insert_vc_ignore "$ig" "${file##*/}"
+        done
+      }
+    done
+    IFS=$old_IFS
+
+    rm -f $tempbase.0 $tempbase.1
+    trap - HUP INT PIPE TERM
+  fi
+
+  # Import from gnulib.
+
+  if $use_gnulib; then
+    gnulib_tool_options="\
+     --no-changelog\
+     --aux-dir=$build_aux\
+     --doc-base=$doc_base\
+     --lib=$gnulib_name\
+     --m4-base=$m4_base/\
+     --source-base=$source_base/\
+     --tests-base=$tests_base\
+     --local-dir=$local_gl_dir\
+     $gnulib_tool_option_extras\
+    "
+    if test $use_libtool = 1; then
+      case "$gnulib_tool_options " in
+        *' --libtool '*) ;;
+        *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
+      esac
+    fi
+    echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
+    $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
+      || die "gnulib-tool failed"
+
+    for file in $gnulib_files; do
+      symlink_to_dir "$GNULIB_SRCDIR" $file \
+        || die "failed to symlink $file"
+    done
+  fi
+
+  bootstrap_post_import_hook \
+    || die "bootstrap_post_import_hook failed"
+
+  # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
+  # gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
+  # The following requires GNU find 4.2.3 or newer.  Considering the usual
+  # portability constraints of this script, that may seem a very demanding
+  # requirement, but it should be ok.  Ignore any failure, which is fine,
+  # since this is only a convenience to help developers avoid the relatively
+  # unusual case in which a symlinked-to .m4 file is git-removed from gnulib
+  # between successive runs of this script.
+  find "$m4_base" "$source_base" \
+    -depth \( -name '*.m4' -o -name '*.[ch]' \) \
+    -type l -xtype l -delete > /dev/null 2>&1
+
+  # Invoke autoreconf with --force --install to ensure upgrades of tools
+  # such as ylwrap.
+  AUTORECONFFLAGS="--verbose --install --force -I $m4_base $ACLOCAL_FLAGS"
+
+  # Some systems (RHEL 5) are using ancient autotools, for which the
+  # --no-recursive option had not been invented.  Detect that lack and
+  # omit the option when it's not supported.  FIXME in 2017: remove this
+  # hack when RHEL 5 autotools are updated, or when they become irrelevant.
+  case $($AUTORECONF --help) in
+    *--no-recursive*) AUTORECONFFLAGS="$AUTORECONFFLAGS --no-recursive";;
+  esac
+
+  # Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
+  echo "running: AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS"
+  AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS \
+    || die "autoreconf failed"
+
+  # Get some extra files from gnulib, overriding existing files.
+  for file in $gnulib_extra_files; do
+    case $file in
+      */INSTALL) dst=INSTALL;;
+      build-aux/*) dst=$build_aux/${file#build-aux/};;
+      *) dst=$file;;
+    esac
+    symlink_to_dir "$GNULIB_SRCDIR" $file $dst \
+      || die "failed to symlink $file"
+  done
+
+  if test $with_gettext = yes; then
+    # Create gettext configuration.
+    echo "$0: Creating po/Makevars from po/Makevars.template ..."
+    rm -f po/Makevars
+    sed '
+      /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
+      /^COPYRIGHT_HOLDER *=/s/=.*/= '"$COPYRIGHT_HOLDER"'/
+      /^MSGID_BUGS_ADDRESS *=/s|=.*|= '"$MSGID_BUGS_ADDRESS"'|
+      /^XGETTEXT_OPTIONS *=/{
+        s/$/ \\/
+        a\
+            '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
+      }
+    ' po/Makevars.template >po/Makevars \
+      || die 'cannot generate po/Makevars'
+
+    # If the 'gettext' module is in use, grab the latest Makefile.in.in.
+    # If only the 'gettext-h' module is in use, assume autopoint already
+    # put the correct version of this file into place.
+    case $gnulib_modules in
+      *gettext-h*) ;;
+      *gettext*)
+        cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in \
+          || die "cannot create po/Makefile.in.in"
+        ;;
+    esac
+
+    if test -d runtime-po; then
+      # Similarly for runtime-po/Makevars, but not quite the same.
+      rm -f runtime-po/Makevars
+      sed '
+        /^DOMAIN *=.*/s/=.*/= '"$package"'-runtime/
+        /^subdir *=.*/s/=.*/= runtime-po/
+        /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
+        /^XGETTEXT_OPTIONS *=/{
+          s/$/ \\/
+          a\
+              '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
+        }
+      ' po/Makevars.template >runtime-po/Makevars \
+      || die 'cannot generate runtime-po/Makevars'
+
+      # Copy identical files from po to runtime-po.
+      (cd po && cp -p Makefile.in.in *-quot *.header *.sed *.sin ../runtime-po)
+    fi
+  fi
+
+  bootstrap_epilogue
+
+  echo "$0: done.  Now you can run './configure'."
+}
+
+# ----------------------------------------------------------------------------
+
+# Local Variables:
+# eval: (add-hook 'before-save-hook 'time-stamp)
+# time-stamp-start: "scriptlibversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
 
 usage() {
   cat <<EOF
@@ -48,6 +1337,11 @@ Optional environment variables:
   GNULIB_URL               Cloneable URL of the gnulib repository.
 
 Options:
+
+  --pull                   Do phase 1: pull files from network
+  --gen                    Do phase 2: generate from local files.
+                           (The default is to do both phases.)
+
   --gnulib-srcdir=DIRNAME  specify the local directory where gnulib
                            sources reside.  Use this if you already
                            have gnulib sources on your machine, and
@@ -59,15 +1353,13 @@ Options:
                            and history on your machine, and do not want
                            to waste your bandwidth downloading them again.
                            Defaults to \$GNULIB_REFDIR
-  --bootstrap-sync         if this bootstrap script is not identical to
-                           the version in the local gnulib sources,
-                           update this script, and then restart it with
 
   --bootstrap-sync         if this bootstrap script is not identical to
                            the version in the local gnulib sources,
                            update this script, and then restart it with
                            /bin/sh or the shell \$CONFIG_SHELL
   --no-bootstrap-sync      do not check whether bootstrap is out of sync
+
   --copy                   copy files instead of creating symbolic links
   --force                  attempt to bootstrap even if the sources seem
                            not to have been checked out
@@ -122,6 +1414,10 @@ EOF
 
 # Parse options.
 
+# Whether to pull and generate.
+pull=false
+gen=false
+
 # Whether to use copies instead of symlinks.
 copy=false
 
@@ -136,10 +1432,14 @@ do
     exit;;
   --version)
     set -e
-    echo "bootstrap $scriptversion"
+    echo "bootstrap $scriptversion lib $scriptlibversion"
     echo "$copyright"
     exit 0
     ;;
+  --pull)
+    pull=true;;
+  --gen)
+    gen=true;;
   --gnulib-srcdir=*)
     GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
   --gnulib-refdir=*)
@@ -153,14 +1453,7 @@ do
   --bootstrap-sync)
     bootstrap_sync=true;;
   --no-bootstrap-sync)
-    if test -f "$medir"/bootstrap-funclib.sh; then
-      bootstrap_sync=false
-    else
-      # We have only completed the first phase of an upgrade from a bootstrap
-      # version < 2022-07-24. Need to do the second phase now.
-      bootstrap_sync=true
-    fi
-    ;;
+    bootstrap_sync=false;;
   --no-git)
     use_git=false;;
   *)
@@ -168,6 +1461,9 @@ do
   esac
 done
 
+# Default is to do both.
+$pull || $gen || pull=true gen=true
+
 $use_git || test -n "$GNULIB_SRCDIR" \
   || die "Error: --no-git requires \$GNULIB_SRCDIR environment variable or --gnulib-srcdir option"
 test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
@@ -188,25 +1484,25 @@ fi
 
 echo "$0: Bootstrapping from checked-out $package sources..."
 
-# Pass GNULIB_SRCDIR to autopull.sh and autogen.sh.
+# Pass GNULIB_SRCDIR and GNULIB_REFDIR to any subsidiary commands that care.
 export GNULIB_SRCDIR
-
-# Pass GNULIB_REFDIR to autopull.sh.
 export GNULIB_REFDIR
 
-if $use_git || test -z "$SKIP_PO"; then
-  "$medir"/autopull.sh \
+if $pull && { $use_git || test -z "$SKIP_PO"; }; then
+  autopull \
       `if $bootstrap_sync; then echo ' --bootstrap-sync'; else echo ' --no-bootstrap-sync'; fi` \
       `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
       `if ! $use_git; then echo ' --no-git'; fi` \
       `if test -n "$SKIP_PO"; then echo ' --skip-po'; fi` \
-    || die "autopull.sh failed."
+    || die "could not fetch auxiliary files"
 fi
 
-"$medir"/autogen.sh \
+if $gen; then
+ autogen \
     `if $copy; then echo ' --copy'; fi` \
     `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
-  || die "autogen.sh failed."
+  || die "could not generate auxiliary files"
+fi
 
 # ----------------------------------------------------------------------------
 
diff --git a/bootstrap-funclib.sh b/bootstrap-funclib.sh
deleted file mode 100644
index 82956908..00000000
--- a/bootstrap-funclib.sh
+++ /dev/null
@@ -1,594 +0,0 @@
-# A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
-
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as build-aux/bootstrap-funclib.sh in gnulib.
-# However, to be useful to your package, you should place a copy of it
-# under version control in the top-level directory of your package.  The
-# intent is that all customization can be done with a bootstrap.conf
-# file also maintained in your version control; gnulib comes with a
-# template build-aux/bootstrap.conf to get you started.
-
-scriptversion=2022-07-24.15; # UTC
-
-nl='
-'
-
-# Ensure file names are sorted consistently across platforms.
-LC_ALL=C
-export LC_ALL
-
-# Honor $PERL, but work even if there is none.
-PERL="${PERL-perl}"
-
-default_gnulib_url=https://git.savannah.gnu.org/git/gnulib.git
-
-# Copyright year, for the --version output.
-copyright_year=`echo "$scriptversion" | sed -e 's/[^0-9].*//'`
-copyright="Copyright (C) ${copyright_year} Free Software Foundation, Inc.
-License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
-This is free software: you are free to change and redistribute it.
-There is NO WARRANTY, to the extent permitted by law."
-
-# warnf_ FORMAT-STRING ARG1...
-warnf_ ()
-{
-  warnf_format_=$1
-  shift
-  nl='
-'
-  case $* in
-    *$nl*) me_=$(printf "$me"|tr "$nl|" '??')
-       printf "$warnf_format_" "$@" | sed "s|^|$me_: |" ;;
-    *) printf "$me: $warnf_format_" "$@" ;;
-  esac >&2
-}
-
-# warn_ WORD1...
-warn_ ()
-{
-  # If IFS does not start with ' ', set it and emit the warning in a subshell.
-  case $IFS in
-    ' '*) warnf_ '%s\n' "$*";;
-    *)    (IFS=' '; warn_ "$@");;
-  esac
-}
-
-# die WORD1...
-die() { warn_ "$@"; exit 1; }
-
-# ------------------------------ Configuration. ------------------------------
-
-# Directory that contains package-specific gnulib modules and/or overrides.
-local_gl_dir=gl
-
-# Name of the Makefile.am
-# XXX Not used.
-gnulib_mk=gnulib.mk
-
-# List of gnulib modules needed.
-gnulib_modules=
-
-# Any gnulib files needed that are not in modules.
-gnulib_files=
-
-# A function to be called for each unrecognized option.  Returns 0 if
-# the option in $1 has been processed by the function.  Returns 1 if
-# the option has not been processed by the function.  Override it via
-# your own definition in bootstrap.conf
-bootstrap_option_hook() { return 1; }
-
-# A function to be called in order to print the --help information
-# corresponding to user-defined command-line options.
-bootstrap_print_option_usage_hook() { :; }
-
-# A function to be called at the end of autopull.sh.
-# Override it via your own definition in bootstrap.conf.
-bootstrap_post_pull_hook() { :; }
-
-# A function to be called right after gnulib-tool is run.
-# Override it via your own definition in bootstrap.conf.
-bootstrap_post_import_hook() { :; }
-
-# A function to be called after everything else in this script.
-# Override it via your own definition in bootstrap.conf.
-bootstrap_epilogue() { :; }
-
-# The command to download all .po files for a specified domain into a
-# specified directory.  Fill in the first %s with the destination
-# directory and the second with the domain name.
-po_download_command_format=\
-"wget --mirror --level=1 -nd -nv -A.po -P '%s' \
- https://translationproject.org/latest/%s/"
-
-# Prefer a non-empty tarname (4th argument of AC_INIT if given), else
-# fall back to the package name (1st argument with munging).
-extract_package_name='
-  /^AC_INIT(\[*/{
-     s///
-     /^[^,]*,[^,]*,[^,]*,[ []*\([^][ ,)]\)/{
-       s//\1/
-       s/[],)].*//
-       p
-       q
-     }
-     s/[],)].*//
-     s/^GNU //
-     y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
-     s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
-     p
-  }
-'
-package=$(${AUTOCONF:-autoconf} --trace AC_INIT:\$4 configure.ac 2>/dev/null)
-if test -z "$package"; then
-  package=$(sed -n "$extract_package_name" configure.ac) \
-      || die 'cannot find package name in configure.ac'
-fi
-gnulib_name=lib$package
-
-build_aux=build-aux
-source_base=lib
-m4_base=m4
-doc_base=doc
-tests_base=tests
-gnulib_extra_files="
-        build-aux/install-sh
-        build-aux/mdate-sh
-        build-aux/texinfo.tex
-        build-aux/depcomp
-        build-aux/config.guess
-        build-aux/config.sub
-        doc/INSTALL
-"
-
-# Additional gnulib-tool options to use.  Use "\newline" to break lines.
-gnulib_tool_option_extras=
-
-# Other locale categories that need message catalogs.
-EXTRA_LOCALE_CATEGORIES=
-
-# Additional xgettext options to use.  Use "\\\newline" to break lines.
-XGETTEXT_OPTIONS='\\\
- --flag=_:1:pass-c-format\\\
- --flag=N_:1:pass-c-format\\\
- --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
-'
-
-# Package bug report address and copyright holder for gettext files
-COPYRIGHT_HOLDER='Free Software Foundation, Inc.'
-MSGID_BUGS_ADDRESS=bug-$package@gnu.org
-
-# Files we don't want to import.
-# XXX Not used.
-excluded_files=
-
-# File that should exist in the top directory of a checked out hierarchy,
-# but not in a distribution tarball.
-checkout_only_file=README-hacking
-
-# Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
-# those files to be generated in directories like lib/, m4/, and po/.
-# Or set it to 'auto' to make this script select which to use based
-# on which version control system (if any) is used in the source directory.
-vc_ignore=auto
-
-# Set this to true in bootstrap.conf to enable --bootstrap-sync by
-# default.
-bootstrap_sync=false
-
-# Override the default configuration, if necessary.
-# Make sure that bootstrap.conf is sourced from the current directory
-# if we were invoked as "sh bootstrap".
-conffile=`dirname "$me"`/bootstrap.conf
-test -r "$conffile" && . "$conffile"
-
-# ------------------------- Build-time prerequisites -------------------------
-
-check_exists() {
-  if test "$1" = "--verbose"; then
-    ($2 --version </dev/null) >/dev/null 2>&1
-    if test $? -ge 126; then
-      # If not found, run with diagnostics as one may be
-      # presented with env variables to set to find the right version
-      ($2 --version </dev/null)
-    fi
-  else
-    ($1 --version </dev/null) >/dev/null 2>&1
-  fi
-
-  test $? -lt 126
-}
-
-# Note this deviates from the version comparison in automake
-# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
-# but this should suffice as we won't be specifying old
-# version formats or redundant trailing .0 in bootstrap.conf.
-# If we did want full compatibility then we should probably
-# use m4_version_compare from autoconf.
-sort_ver() { # sort -V is not generally available
-  ver1="$1"
-  ver2="$2"
-
-  # split on '.' and compare each component
-  i=1
-  while : ; do
-    p1=$(echo "$ver1" | cut -d. -f$i)
-    p2=$(echo "$ver2" | cut -d. -f$i)
-    if [ ! "$p1" ]; then
-      echo "$1 $2"
-      break
-    elif [ ! "$p2" ]; then
-      echo "$2 $1"
-      break
-    elif [ ! "$p1" = "$p2" ]; then
-      if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
-        echo "$2 $1"
-      elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
-        echo "$1 $2"
-      else # numeric, then lexicographic comparison
-        lp=$(printf "%s\n%s\n" "$p1" "$p2" | LANG=C sort -n | tail -n1)
-        if [ "$lp" = "$p2" ]; then
-          echo "$1 $2"
-        else
-          echo "$2 $1"
-        fi
-      fi
-      break
-    fi
-    i=$(($i+1))
-  done
-}
-
-get_version_sed='
-# Move version to start of line.
-s/.*[v ]\([0-9]\)/\1/
-
-# Skip lines that do not start with version.
-/^[0-9]/!d
-
-# Remove characters after the version.
-s/[^.a-z0-9-].*//
-
-# The first component must be digits only.
-s/^\([0-9]*\)[a-z-].*/\1/
-
-#the following essentially does s/5.005/5.5/
-s/\.0*\([1-9]\)/.\1/g
-p
-q'
-
-get_version() {
-  app=$1
-
-  $app --version >/dev/null 2>&1 || { $app --version; return 1; }
-
-  $app --version 2>&1 | sed -n "$get_version_sed"
-}
-
-check_versions() {
-  ret=0
-
-  while read app req_ver; do
-    # We only need libtoolize from the libtool package.
-    if test "$app" = libtool; then
-      app=libtoolize
-    fi
-    # Exempt git if git is not needed.
-    if test "$app" = git; then
-      $check_git || continue
-    fi
-    # Honor $APP variables ($TAR, $AUTOCONF, etc.)
-    appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
-    test "$appvar" = TAR && appvar=AMTAR
-    case $appvar in
-        GZIP) ;; # Do not use $GZIP:  it contains gzip options.
-        PERL::*) ;; # Keep perl modules as-is
-        *) eval "app=\${$appvar-$app}" ;;
-    esac
-
-    # Handle the still-experimental Automake-NG programs specially.
-    # They remain named as the mainstream Automake programs ("automake",
-    # and "aclocal") to avoid gratuitous incompatibilities with
-    # pre-existing usages (by, say, autoreconf, or custom autogen.sh
-    # scripts), but correctly identify themselves (as being part of
-    # "GNU automake-ng") when asked their version.
-    case $app in
-      automake-ng|aclocal-ng)
-        app=${app%-ng}
-        ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
-          warn_ "Error: '$app' not found or not from Automake-NG"
-          ret=1
-          continue
-        } ;;
-      # Another check is for perl modules.  These can be written as
-      # e.g. perl::XML::XPath in case of XML::XPath module, etc.
-      perl::*)
-        # Extract module name
-        app="${app#perl::}"
-        if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
-          warn_ "Error: perl module '$app' not found"
-          ret=1
-        fi
-        continue
-        ;;
-    esac
-    if [ "$req_ver" = "-" ]; then
-      # Merely require app to exist; not all prereq apps are well-behaved
-      # so we have to rely on $? rather than get_version.
-      if ! check_exists --verbose $app; then
-        warn_ "Error: '$app' not found"
-        ret=1
-      fi
-    else
-      # Require app to produce a new enough version string.
-      inst_ver=$(get_version $app)
-      if [ ! "$inst_ver" ]; then
-        warn_ "Error: '$app' not found"
-        ret=1
-      else
-        latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
-        if [ ! "$latest_ver" = "$inst_ver" ]; then
-          warnf_ '%s\n'                                        \
-              "Error: '$app' version == $inst_ver is too old"  \
-              "       '$app' version >= $req_ver is required"
-          ret=1
-        fi
-      fi
-    fi
-  done
-
-  return $ret
-}
-
-print_versions() {
-  echo "Program    Min_version"
-  echo "----------------------"
-  printf %s "$buildreq"
-  echo "----------------------"
-  # can't depend on column -t
-}
-
-# check_build_prerequisites check_git
-check_build_prerequisites()
-{
-  check_git="$1"
-
-  # gnulib-tool requires at least automake and autoconf.
-  # If either is not listed, add it (with minimum version) as a prerequisite.
-  case $buildreq in
-    *automake*) ;;
-    *) buildreq="automake 1.9
-$buildreq" ;;
-  esac
-  case $buildreq in
-    *autoconf*) ;;
-    *) buildreq="autoconf 2.59
-$buildreq" ;;
-  esac
-
-  # When we can deduce that gnulib-tool will require patch,
-  # and when patch is not already listed as a prerequisite, add it, too.
-  if test -d "$local_gl_dir" \
-     && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
-    case $buildreq in
-      *patch*) ;;
-      *) buildreq="patch -
-$buildreq" ;;
-    esac
-  fi
-
-  if ! printf '%s' "$buildreq" | check_versions; then
-    echo >&2
-    if test -f README-prereq; then
-      die "See README-prereq for how to get the prerequisite programs"
-    else
-      die "Please install the prerequisite programs"
-    fi
-  fi
-
-  # Warn the user if autom4te appears to be broken; this causes known
-  # issues with at least gettext 0.18.3.
-  probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
-  if test "x$probe" != xhi; then
-    warn_ "WARNING: your autom4te wrapper eats stdin;"
-    warn_ "if bootstrap fails, consider upgrading your autotools"
-  fi
-}
-
-# find_tool ENVVAR NAMES...
-# -------------------------
-# Search for a required program.  Use the value of ENVVAR, if set,
-# otherwise find the first of the NAMES that can be run.
-# If found, set ENVVAR to the program name, die otherwise.
-#
-# FIXME: code duplication, see also gnu-web-doc-update.
-find_tool ()
-{
-  find_tool_envvar=$1
-  shift
-  find_tool_names=$@
-  eval "find_tool_res=\$$find_tool_envvar"
-  if test x"$find_tool_res" = x; then
-    for i; do
-      if check_exists $i; then
-        find_tool_res=$i
-        break
-      fi
-    done
-  fi
-  if test x"$find_tool_res" = x; then
-    warn_ "one of these is required: $find_tool_names;"
-    die   "alternatively set $find_tool_envvar to a compatible tool"
-  fi
-  eval "$find_tool_envvar=\$find_tool_res"
-  eval "export $find_tool_envvar"
-}
-
-# --------------------- Preparing GNULIB_SRCDIR for use. ---------------------
-# This is part of autopull.sh, but bootstrap needs it too, for self-upgrading.
-
-cleanup_gnulib() {
-  status=$?
-  # XXX It's a bad idea to erase the submodule directory if it contains local
-  #     modifications.
-  rm -fr "$gnulib_path"
-  exit $status
-}
-
-git_modules_config () {
-  test -f .gitmodules && git config --file .gitmodules "$@"
-}
-
-prepare_GNULIB_SRCDIR ()
-{
-  if test -n "$GNULIB_SRCDIR"; then
-    # Use GNULIB_SRCDIR directly.
-    # We already checked that $GNULIB_SRCDIR references a directory.
-    # Verify that it contains a gnulib checkout.
-    test -f "$GNULIB_SRCDIR/gnulib-tool" \
-      || die "Error: --gnulib-srcdir or \$GNULIB_SRCDIR is specified, but does not contain gnulib-tool"
-  elif $use_git; then
-    gnulib_path=$(git_modules_config submodule.gnulib.path)
-    test -z "$gnulib_path" && gnulib_path=gnulib
-
-    # Get gnulib files.  Populate $gnulib_path, possibly updating a
-    # submodule, for use in the rest of the script.
-
-    if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git \
-       && git_modules_config submodule.gnulib.url >/dev/null; then
-      # Use GNULIB_REFDIR as a reference.
-      echo "$0: getting gnulib files..."
-      if git submodule -h|grep -- --reference > /dev/null; then
-        # Prefer the one-liner available in git 1.6.4 or newer.
-        git submodule update --init --reference "$GNULIB_REFDIR" \
-          "$gnulib_path" || exit $?
-      else
-        # This fallback allows at least git 1.5.5.
-        if test -f "$gnulib_path"/gnulib-tool; then
-          # Since file already exists, assume submodule init already complete.
-          git submodule update -- "$gnulib_path" || exit $?
-        else
-          # Older git can't clone into an empty directory.
-          rmdir "$gnulib_path" 2>/dev/null
-          git clone --reference "$GNULIB_REFDIR" \
-            "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
-            && git submodule init -- "$gnulib_path" \
-            && git submodule update -- "$gnulib_path" \
-            || exit $?
-        fi
-      fi
-    else
-      # GNULIB_REFDIR is not set or not usable. Ignore it.
-      if git_modules_config submodule.gnulib.url >/dev/null; then
-        echo "$0: getting gnulib files..."
-        git submodule init -- "$gnulib_path" || exit $?
-        git submodule update -- "$gnulib_path" || exit $?
-
-      elif [ ! -d "$gnulib_path" ]; then
-        echo "$0: getting gnulib files..."
-
-        trap cleanup_gnulib 1 2 13 15
-
-        shallow=
-        if test -z "$GNULIB_REVISION"; then
-          if git clone -h 2>&1 | grep -- --depth > /dev/null; then
-            shallow='--depth 2'
-          fi
-          git clone $shallow ${GNULIB_URL:-$default_gnulib_url} "$gnulib_path" \
-            || cleanup_gnulib
-        else
-          if git fetch -h 2>&1 | grep -- --depth > /dev/null; then
-            shallow='--depth 2'
-          fi
-          mkdir -p "$gnulib_path"
-          # Only want a shallow checkout of $GNULIB_REVISION, but git does not
-          # support cloning by commit hash. So attempt a shallow fetch by commit
-          # hash to minimize the amount of data downloaded and changes needed to
-          # be processed, which can drastically reduce download and processing
-          # time for checkout. If the fetch by commit fails, a shallow fetch can
-          # not be performed because we do not know what the depth of the commit
-          # is without fetching all commits. So fallback to fetching all commits.
-          git -C "$gnulib_path" init
-          git -C "$gnulib_path" remote add origin \
-              ${GNULIB_URL:-$default_gnulib_url}
-          git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION" \
-            || git -C "$gnulib_path" fetch origin \
-            || cleanup_gnulib
-          git -C "$gnulib_path" reset --hard FETCH_HEAD
-        fi
-
-        trap - 1 2 13 15
-      fi
-    fi
-    GNULIB_SRCDIR=$gnulib_path
-    # Verify that the submodule contains a gnulib checkout.
-    test -f "$gnulib_path/gnulib-tool" \
-      || die "Error: $gnulib_path is supposed to contain a gnulib checkout, but does not contain gnulib-tool"
-  fi
-
-  # XXX Should this be done if $use_git is false?
-  if test -d "$GNULIB_SRCDIR"/.git && test -n "$GNULIB_REVISION" \
-     && ! git_modules_config submodule.gnulib.url >/dev/null; then
-    (cd "$GNULIB_SRCDIR" && git checkout "$GNULIB_REVISION") || cleanup_gnulib
-  fi
-
-  # $GNULIB_SRCDIR now points to the version of gnulib to use, and
-  # we no longer need to use git or $gnulib_path below here.
-}
-
-# -------- Upgrading bootstrap to the version found in GNULIB_SRCDIR. --------
-
-upgrade_bootstrap ()
-{
-  { cmp -s "$medir"/bootstrap "$GNULIB_SRCDIR/top/bootstrap" \
-    && cmp -s "$medir"/bootstrap-funclib.sh "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" \
-    && cmp -s "$medir"/autopull.sh "$GNULIB_SRCDIR/top/autopull.sh" \
-    && cmp -s "$medir"/autogen.sh "$GNULIB_SRCDIR/top/autogen.sh"; \
-  } || {
-    echo "$0: updating bootstrap & companions and restarting..."
-    case $(sh -c 'echo "$1"' -- a) in
-      a) ignored=--;;
-      *) ignored=ignored;;
-    esac
-    exec sh -c \
-      '{ if test -f "$1"; then cp "$1" "$3"; else cp "$2" "$3"; fi; } && { if test -f "$4"; then cp "$4" "$5"; else rm -f "$5"; fi; } && { if test -f "$6"; then cp "$6" "$7"; else rm -f "$7"; fi; } && { if test -f "$8"; then cp "$8" "$9"; else rm -f "$9"; fi; } && shift && shift && shift && shift && shift && shift && shift && shift && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
-      $ignored \
-      "$GNULIB_SRCDIR/top/bootstrap" "$GNULIB_SRCDIR/build-aux/bootstrap" "$medir/bootstrap" \
-      "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" "$medir/bootstrap-funclib.sh" \
-      "$GNULIB_SRCDIR/top/autopull.sh" "$medir/autopull.sh" \
-      "$GNULIB_SRCDIR/top/autogen.sh" "$medir/autogen.sh" \
-      "$0" "$@" --no-bootstrap-sync
-  }
-}
-
-# ----------------------------------------------------------------------------
-
-if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
-  use_gnulib=false
-else
-  use_gnulib=true
-fi
-
-# ----------------------------------------------------------------------------
-
-# Local Variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End: