+# even if we use gnulib's acl.h with integrated m4 file later on (used because
+# of very useful file_has_acl() function) we need following checks that restrict
+# tar to use POSIX.1e ACLs only.
+AC_ARG_WITH([posix-acls],
+ AS_HELP_STRING([--without-posix-acls],
+ [do not use POSIX.1e access control lists]),
+ [with_posix_acls=no])
+if test "x$with_posix_acls" != "xno"; then
+ AC_CHECK_HEADERS(sys/acl.h,, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_get_file], [acl pacl],, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_get_fd], [acl pacl],, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_set_file], [acl pacl],, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_set_fd], [acl pacl],, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_to_text], [acl pacl],, [with_posix_acl=no])
+ AC_SEARCH_LIBS([acl_from_text], [acl pacl],, [with_posix_acl=no])
+ if test "x$with_posix_acls" != xno; then
+ AC_DEFINE(HAVE_POSIX_ACLS,,[Define when we have working POSIX acls])
+ fi
+else
+ # disable acls in gnulib's checks
+ export enable_acl=no
+fi
+