File: gawk.info,  Node: Extension Version String,  Next: Input Parsers,  Prev: Exit Callback Functions,  Up: Registration Functions

17.4.6.3 Registering An Extension Version String
................................................

You can register a version string that indicates the name and version of
your extension with 'gawk', as follows:

'void register_ext_version(const char *version);'
     Register the string pointed to by 'version' with 'gawk'.  Note that
     'gawk' does _not_ copy the 'version' string, so it should not be
     changed.

   'gawk' prints all registered extension version strings when it is
invoked with the '--version' option.