
Section 2.3.2

The example from section 2.3.2 is renamed "treble_inout" so that
it can be included in the same example module.

Section 2.3.3

The source code from section 2.3.3 (compiler constants) is not
included. This code is present verbatim in the Fcntl module
distributed with perl 5.6.1. (The code in perl 5.8.0 is modified
to use ExtUtils::Constant)
