File: gawk.info,  Node: Extension API Variables,  Next: Extension API Boilerplate,  Prev: Redirection API,  Up: Extension API Description

17.4.14 API Variables
---------------------

The API provides two sets of variables.  The first provides information
about the version of the API (both with which the extension was
compiled, and with which 'gawk' was compiled).  The second provides
information about how 'gawk' was invoked.

* Menu:

* Extension Versioning::          API Version information.
* Extension GMP/MPFR Versioning:: Version information about GMP and MPFR.
* Extension API Informational Variables:: Variables providing information about
                                  'gawk''s invocation.