About This Guide

The QNX 4 --> QNX 6 Migration Guide is intended as a kind of road map to help you:

discover the differences and additional functionality of QNX 6
modify your existing QNX 4 source code to work under QNX 6.

Written specifically for the QNX 4 applications developer, the guide's main focus is the API; it doesn't deal with differences in system commands, editors, and so on. Nevertheless, we hope you'll find the guide a valuable resource for determining what you need to do to your existing software in order to take advantage of the rich new features of QNX 6.

The following may help you find what you need in this guide:

When you want to:	Go to:
Get an overview of the differences between the two systems	Meet the New OS
Plan your migration strategy	Migration Methodology
Find out about headers, libraries, debugging, buildfiles, and more	Development Environment
Learn about threads, connection IDs, pulses, resource managers, and more	Programming Issues
Look up a cover function	The Migration Library
Identify items in your QNX 4 programs that need attention	The `mig4nto` Utility
Look up the QNX 6 equivalent for any QNX 4 function	QNX 4 Functions & QNX 6 Equivalents
View the list of QNX 4 functions supported by QNX 6	QNX 4 functions supported by QNX 6

To view a linked table of contents for this guide, click here.