Components and Tools

The range of components available within the ChorusOS operating system is organized in a hierarchy spanning from the NUCLEUS, at the lowest level, to the EXAMPLES, at the top level as shown in Table 1-1.

Table 1-1 Source components in a ChorusOS and their level

component	level
NUCLEUS	nucleus level
DRV DRV_F BSP	board support package level
OS IOM	operating system level
EXAMPLES	applications level

The ChorusOS product ensures compatibility between components built with the two development tools available, mkmk and imake. The modularity of the source code facilitates porting of the operating system. See the ChorusOS 4.0 Porting Guide for more information.

The mkmk and imake tools provide a mechanism which uses input files in order to create the Makefile appropriate to that directory. They:

• provide the rules for compiling

• manage dependencies

• allow you to add components

• enable you to configure source files with configurator or the ews graphical tool

Introduction to mkmk

Table 1-2 lists components built with the mkmk tool.

Table 1-2 Built with mkmk

Component	Description
NUCLEUS	nucleus
OS	POSIX environment
IOM	I/O Manager

The mkmk tool is described in this document. It is used to build components at the nucleus and operating system levels (Table 1-2).

Introduction to imake

Table 1-3 lists components built with the imake tool.

Table 1-3 Components Built with imake

Component	Description
DRV	Drivers
DRV_F	Family specific drivers
BSP	Boot
EXAMPLES	Applications

For further information on the imake tool refer to Chapter 3, Building with imake of this guide, ChorusOS 4.0 Introduction and to the ChorusOSMkMf(1CC) man page.