-dnl Special Autoconf macros for GNU Tar -*- autoconf -*-
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl Special Autoconf macros for GNU tar -*- autoconf -*-
+
+dnl Copyright 2009, 2013 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GNU tar.
dnl
dnl GNU tar is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation; either version 3, or (at your option)
-dnl any later version.
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
dnl
dnl GNU tar is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
-dnl You should have received a copy of the GNU General Public License along
-dnl with GNU tar. If not, see <http://www.gnu.org/licenses/>.
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
AC_DEFUN([TAR_COMPR_PROGRAM],[
m4_pushdef([tar_compr_define],translit($1,[a-z+-],[A-ZX_])[_PROGRAM])
[tar_compr_var=m4_if($2,,$1,$2)])
AC_DEFINE_UNQUOTED(tar_compr_define, "$tar_compr_var",
[Define to the program name of ]$1[ compressor program])])
+
+# Provide <attr/xattr.h>, if necessary
+
+AC_DEFUN([TAR_HEADERS_ATTR_XATTR_H],
+[
+ AC_ARG_WITH([xattrs],
+ AS_HELP_STRING([--without-xattrs], [don't use linux extended attributes]),
+ [], [with_xattrs=maybe]
+ )
+
+ AC_CHECK_HEADERS([attr/xattr.h])
+ AM_CONDITIONAL([TAR_COND_XATTR_H],[test "$ac_cv_header_attr_xattr_h" = yes])
+ if test "$ac_cv_header_attr_xattr_h" = yes; then
+ AC_CHECK_FUNCS(getxattr fgetxattr lgetxattr \
+ setxattr fsetxattr lsetxattr \
+ listxattr flistxattr llistxattr,
+ # only when functions are present
+ AC_DEFINE([HAVE_ATTR_XATTR_H], [1],
+ [define to 1 if we have <attr/xattr.h> header])
+ if test "$with_xattrs" != no; then
+ AC_DEFINE([HAVE_XATTRS],,[Define when we have working linux xattrs.])
+ fi
+ )
+ fi
+])