gawk: Compatibility Mode
C.1 Downward Compatibility and Debugging
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POSIX/GNU, for a summary of the GNU extensions to the 'awk'
language and program. All of these features can be turned off by
invoking 'gawk' with the '--traditional' option or with the '--posix'
option.
If 'gawk' is compiled for debugging with '-DDEBUG', then there is one
more option available on the command line:
'-Y'
'--parsedebug'
Print out the parse stack information as the program is being
parsed.
This option is intended only for serious 'gawk' developers and not
for the casual user. It probably has not even been compiled into your
version of 'gawk', since it slows down execution.
Info Catalog
gawk: Notes
gawk: Additions