Depends on the code, could go from a simple recompile to a redesign. QNX6 is not source compatible with QNX4.

> -----Original Message-----
> From: Rashid Mirza [mailto:community-noreply@qnx.com]
> Sent: Tuesday, May 25, 2010 2:52 AM
> To: qnx4-community
> Subject: porting QNX4 project to QNX6.4
> 
> i have a c/c++ project that was developed using QNX4 version.
> If i were to use QNX 6.4, and import files from the previous version of
> QNX, what changes would i need to make, if any, to have a successful
> build of the project?
> 
> 
> 
> _______________________________________________
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> QNX4 Community Support
> http://community.qnx.com/sf/go/post55455
>