AT_SETUP([ustar: unsplittable file name])
AT_KEYWORDS([longname ustar lustar01])
-m4_define([LONGNAME],
+m4_pushdef([LONGNAME],
[this_is_a_very_long_name_for_a_file_designed_to_test_generation_of_ustar_archives_by_gnu_tar_semicolon_it_will_not_fit_the_name_field_and_cannot_be_split_between_name_and_prefix])
AT_TAR_CHECK([
tar: Exiting with failure status due to previous errors
],[],[],[ustar])
+m4_popdef([LONGNAME])
AT_CLEANUP