This allows?gawk?to find the?.mo?file associated with your program. Without this step,?gawk?uses the?messages?text domain,which likely does not contain translations for your program.

A primary goal for?gawk?is compatibility with the?POSIX?standard,as well as with the latest version of?UNIX?awk. To this end,?gawk?incorporates the following user visible features which are not described in the?AWK?book,but are part of the Bell Laboratories version of?awk,and are in the?POSIX?standard.

The book indicates that command line variable assignment happens when?awk?would otherwise open the argument as a file,which is after the?BEGIN?block is executed. However,in earlier implementations,when such an assignment appeared before any file names,the assignment would happen?before?the?BEGIN?block was run. Applications came to depend on this ‘‘feature.’’ When?awk?was changed to match its documentation,the?-v?option for assigning variables before program execution was added to accommodate applications that depended upon the old behavior. (This feature was agreed upon by both the Bell Laboratories and the?GNU?developers.)

The?-W?option for implementation specific features is from the?POSIX?standard.

When processing arguments,?gawk?uses the special option ‘‘--’’ to signal the end of arguments. In compatibility mode,it warns about but otherwise ignores undefined options. In normal operation,such arguments are passed on to the?AWK?program for it to process.

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