CORBA24 — AbstractBase not declared.

The standard IDL files included in the corba/ subdirectory
of the IDL text files archive, formal/00-04-01, should be compilable
with any compliant IDL parser. Most notably, these files comprise
a "corba/orb.idl" source file, whose inclusion in application
IDL files is necessary whenever an application has to manipulate
type CORBA::TypeCode (as mandated by section "3.14 CORBA module"
of the CORBA specification v. 2.3).

It is thus expected that the file corba/orb.idl be a legal
IDL specification.

This is not the case, because the corba/orb.idl files #includes
a CORBA_Stream.idl file, which contains the following declaration:

abstract valuetype DataOutputStream

In this declaration, the syntax of the language imposes that
the name AbstractBase be interpreted as a <scoped_name>.
This <scoped_name> is not defined in corba/orb.idl or any of
the files it #includes.
The declaration is therefore illegal.

According to the CORBA 2.3 specification, section
"4.2 The ORB operations", module CORBA contains a declaration
"native AbstractBase".

The following resolution is therefore proposed for this issue:

In file corba/orb.idl, include the followinf declaration:

native AbstractBase; // Chapter 4

Declaration of native AbstractBase needs to be added to orb.idl as stated above.