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Obsolete Options and/or Features

This section describes features and/or command-line options from previous releases of gawk that are either not available in the current version or that are still supported but deprecated (meaning that they will not be in the next release).

For version 3.1 of gawk, there are no deprecated command-line options from the previous version of gawk. The use of next file (two words) for nextfile was deprecated in gawk 3.0 but still worked. Starting with version 3.1, the two-word usage is no longer accepted.

The process-related special files described in Special Files for Process-Related Information, work as described, but are now considered deprecated. gawk prints a warning message every time they are used. (Use PROCINFO instead; see Built-in Variables That Convey Information.) They will be removed from the next release of gawk.