build: update gnulib submodule to latest

* bootstrap: Update using './bootstrap --bootstrap-sync'.

bootstrap

@@ -37,7 +37,7 @@ medir=`dirname "$me"`
 
 # A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
 
-scriptlibversion=2024-11-12.21; # UTC
+scriptlibversion=2025-02-16.12; # UTC
 
 # Copyright (C) 2003-2025 Free Software Foundation, Inc.
 #
@@ -152,7 +152,8 @@ 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
+# When extracting the package name from an AC_INIT invocation,
+# 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(\[*/{
@@ -164,17 +165,20 @@ extract_package_name='
        q
      }
      s/[],)].*//
-     s/^GNU //
-     y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
-     s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
      p
   }
 '
-package=$(${AUTOCONF:-autoconf} --trace AC_INIT:\$4 configure.ac 2>/dev/null)
+normalize_package_name='
+  s/^GNU //
+  y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
+  s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
+'
+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
+package=$(echo "$package" | sed "$normalize_package_name")
 gnulib_name=lib$package
 
 build_aux=build-aux
@@ -576,18 +580,11 @@ prepare_GNULIB_SRCDIR ()
           || cleanup_gnulib
         else
           # GNULIB_REFDIR is not set or not usable. Ignore it.
-          shallow=
+          shallow='--depth 2'
           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" "$gnulib_path" \
               || cleanup_gnulib
           else
-            if git fetch -h 2>&1 | grep -- --depth > /dev/null; then
-              shallow='--depth 2'
-            fi
-            mkdir -p "$gnulib_path"
             # Only want a shallow checkout of $GNULIB_REVISION, but git does not
             # support cloning by commit hash. So attempt a shallow fetch by
             # commit hash to minimize the amount of data downloaded and changes
@@ -596,13 +593,34 @@ prepare_GNULIB_SRCDIR ()
             # shallow fetch cannot be performed because we do not know what the
             # depth of the commit is without fetching all commits. So fall back
             # to fetching all commits.
-            git -C "$gnulib_path" init
+            # $GNULIB_REVISION can be a commit id, a tag name, or a branch name.
+            mkdir -p "$gnulib_path"
+            # Use a -c option to silence an annoying message
+            # "hint: Using 'master' as the name for the initial branch."
+            # (cf. <https://stackoverflow.com/questions/65524512/>).
+            git -C "$gnulib_path" -c init.defaultBranch=master init
             git -C "$gnulib_path" remote add origin "$gnulib_url"
-            git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION" \
-              || git -C "$gnulib_path" fetch origin \
-              || cleanup_gnulib
-            git -C "$gnulib_path" reset --hard FETCH_HEAD
-            git -C "$gnulib_path" checkout "$GNULIB_REVISION" || cleanup_gnulib
+            if git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION"
+            then
+              # "git fetch" of the specific commit succeeded.
+              git -C "$gnulib_path" reset --hard FETCH_HEAD \
+                || cleanup_gnulib
+              # "git fetch" does not fetch tags (at least in git version 2.43).
+              # If $GNULIB_REVISION is a tag (not a commit id or branch name),
+              # add the tag explicitly.
+              revision=`git -C "$gnulib_path" log -1 --pretty=format:%H`
+              branch=`LC_ALL=C git -C "$gnulib_path" remote show origin \
+                      | sed -n -e 's/^    \([^ ]*\) * tracked$/\1/p'`
+              test "$revision" = "$GNULIB_REVISION" \
+                || test "$branch" = "$GNULIB_REVISION" \
+                || git -C "$gnulib_path" tag "$GNULIB_REVISION"
+            else
+              # Fetch the entire repository.
+              git -C "$gnulib_path" fetch origin \
+                || cleanup_gnulib
+              git -C "$gnulib_path" checkout "$GNULIB_REVISION" \
+                || cleanup_gnulib
+            fi
           fi
         fi
         trap - HUP INT PIPE TERM

gnulib

@@ -1 +1 @@
-Subproject commit 955360a66c99bdd9ac3688519a8b521b06958fd3
+Subproject commit a92aa179978a136fa9cc9023d02b5529b19a2210