-m4_define([DIR],[this_is_a_very_long_name_for_a_directory_which_causes_problems])
-m4_define([FILE],[this_is_a_very_long_file_name_which_raises_issues.c])
+m4_pushdef([DIR],[this_is_a_very_long_name_for_a_directory_which_causes_problems])
+m4_pushdef([FILE],[this_is_a_very_long_file_name_which_raises_issues.c])