The WITH DEBUGGING MODE clause indicates that all debugging sections and all debugging lines are to be included in the object code. If this clause is not specified, all debugging lines and sections are treated as if they were comment lines.
The WITH DEBUGGING MODE clause is not an obsolete feature in ANSI'85 as it can also be used in the Nucleus.
Note: The WITH DEBUGGING MODE clause is part of the ANSI Nucleus as well as the ANSI Debug module. It is not obsolete and is not scheduled to be deleted from the next full revision of the ANSI Standard.