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[cdt-dev] lpg question

yacc (bison) supports --verbose and --debug options allowing automatic
generation of debug outputs like:

Reducing via rule 93 (line 329), statement -> statement_list
Reducing via rule 185 (line 601), statement_list -> translation unit

Does lpg analogs (-verbose and -debug switches) allow the same? I'm
generating parsers with those options.
*.l files indicate that VERBOSE, DEBUG are options in effect. But
parser files generated are the same
as without -verbose and -debug, i.e. no debugging outputs were generated.

Am I missing something?