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The GNU Awk User's Guide

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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:

-W parsedebug
Prints 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.

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