Compatibility Mode (The GNU Awk User’s Guide)
From Get docs
Gawk/docs/latest/Compatibility-Mode
C.1 Downward Compatibility and Debugging
See section Extensions in gawk Not in POSIX awk, 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.