thx about your help, but i'm a rookie about QNX. Can you give me a set of more detailed opration steps about the 
approaches you just mentioned.
By the way, in Window->Preferences->QNX, it shows as the pic in accessories, and in Select Install there's just one more
 option, which is "use environment variables". I have no idea about switching to use 6.3.2 SDP.

thx about your help, but i'm a rookie about QNX. Can you give me a set of more detailed opration steps about the 
approaches you just mentioned.
By the way, in Window->Preferences->QNX, it shows as the pic in accessories, and in Select Install there's just one more

 option, which is "use environment variables". I have no idea about switching to use 6.3.2 SDP.

> Do you want to use compilers from 6.5.0 or IDE? If just IDE you can switch in 
> IDE to use 6.3.2 SDP in Window->Preferences->QNX
> If you want compilers from 6.5.0 you have to switch QNX_TARGET to 6.3.2 (
> whatever path is)
> 
> On 05/24/2011 10:30 AM, Leo Chai wrote:
> > My target is QNX Neutrino RTOS 6.3.2 and the QNX Software Development 
> Platform 6.5.0.
> > Whenever I run de binary files compiled by the momentics, some errors 
> ccurred， such as "could not find library libcpp.so.4". 
> > Could anybody tell me how can i use QNX Software Development Platform 6.5.0,
>  which includes Momentics4.7, to develop the software running on the QNX6.3.2.
> 
> > Thanks a lot!
> > 
> > 
> > 
> > _______________________________________________
> > 
> > General
> > http://community.qnx.com/sf/go/post86081

I could successfully build for 6.3.2 (x86) with the following setup:

- installed Momentics 4.6 (for 6.4.1)
- installed Momentics for 6.3.2 on another machine
- from that, copied the *target* branch into 4.6
(If I understand correctly the target path can be specified using the config utility, but I did not know that then)

And... it just worked.

I tried the same with Momentics 4.7 and building code seems to work, but 4.7 has some problems with qconn from 6.3.2. So
 for 6.3.2 targets I stay with 4.6.

Regards,
Saul