build: update gnulib submodule to latest

* m4/xattr.m4: Remove.  This file is now autogenerated by 'bootstrap',
since it's now in Gnulib.  (I did this part by hand.)

diff --git a/gnulib b/gnulib
index 80b225fe1ea7d58848bf905dedaae8bb83872b45..6ab315e58df7718d4d4a307d415a5bb95b676654 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 80b225fe1ea7d58848bf905dedaae8bb83872b45
+Subproject commit 6ab315e58df7718d4d4a307d415a5bb95b676654

diff --git a/m4/xattr.m4 b/m4/xattr.m4
deleted file mode 100644 (file)
index e95e349..0000000
--- a/m4/xattr.m4
+++ /dev/null
@@ -1,43 +0,0 @@
-# xattr.m4 - check for Extended Attributes (Linux)
-# serial 4
-
-# Copyright (C) 2003-2023 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# Originally written by Andreas Gruenbacher.
-
-AC_DEFUN([gl_FUNC_XATTR],
-[
-  AC_ARG_ENABLE([xattr],
-        AS_HELP_STRING([--disable-xattr],
-                       [do not support extended attributes]),
-        [use_xattr=$enableval], [use_xattr=yes])
-
-  LIB_XATTR=
-  AC_SUBST([LIB_XATTR])
-
-  if test "$use_xattr" = "yes"; then
-    AC_CHECK_HEADERS([attr/error_context.h attr/libattr.h])
-    use_xattr=no
-    if test $ac_cv_header_attr_libattr_h = yes \
-        && test $ac_cv_header_attr_error_context_h = yes; then
-      xattr_saved_LIBS=$LIBS
-      AC_SEARCH_LIBS([attr_copy_file], [attr],
-                     [test "$ac_cv_search_attr_copy_file" = "none required" ||
-                        LIB_XATTR=$ac_cv_search_attr_copy_file])
-      AC_CHECK_FUNCS([attr_copy_file])
-      LIBS=$xattr_saved_LIBS
-      if test $ac_cv_func_attr_copy_file = yes; then
-        use_xattr=yes
-      fi
-    fi
-    if test $use_xattr = no; then
-      AC_MSG_WARN([libattr development library was not found or not usable.])
-      AC_MSG_WARN([AC_PACKAGE_NAME will be built without xattr support.])
-    fi
-  fi
-  AC_DEFINE_UNQUOTED([USE_XATTR], [`test $use_xattr != yes; echo $?`],
-                     [Define if you want extended attribute support.])
-])