This switch controls whether or not line numbering debug information is included in the object file, thus allowing the assembler source file to be viewed from within a source-level debugger.
┌────┬──────┬─────┬────┬──────────────────────────────────────────────────┐ │Type│Global│Group│File│Default │ ├────┼──────┼─────┼────┼──────────────────────────────────────────────────┤ │S │Yes │Yes │Yes │-Odl (line numbering debug information is not │ │ │ │ │ │included in object file) │ └────┴──────┴─────┴────┴──────────────────────────────────────────────────┘