Is there a pre-processor variable indicating QNX SDP 6/7 difference?

Question

We have some code originally developed for QNX SDP 6.6 that we are porting to QNX SDP 7.0 (7.1 does not yet have the board support packages we need).

As part of the porting effort, we are finding things that have been removed in 7.1, such as getprio() to retrieve the process priority. Now I know what that need to be replaced with but, in the interest of minimal impact to the code base, I went looking for a pre-processor variable to indicate whether I'm compiling with SDP 7.0 or something earlier.

That way, I could simply use #ifdef to select which code to compile, along the lines of __STDC_VERSION__ to figure out which ISO iteration applies.

However, I can't find anything in the QNX docs that seem relevant. I found __QNX__ and __QNXNTO__ which together let me figure out whether it's non-QNX, QNX 4, or QNX Neutrino, but nothing that appears to detect a difference between QNX 6 and 7.

Is there such a beast available?

Answer 1

It appears there is a preprocessor macro for it.

Specifically, you include <sys/neutrino.h> for QNX 6.6 or 7.0, or <sys/nto_version.h> for QNX 7.1. I don't have access to others but would expect the scheme to continue.

You can then test _NTO_VERSION which is defined as VRR, where V is the major version and RR is the revision.

The following transcript shows the relevant header file content:

Cmd> cd ~/qnx_inst
Cmd> rgrep '#define _NTO_VERSION' | grep -v 'Binary file'
qnx660/target/qnx6/usr/include/sys/neutrino.h:#define _NTO_VERSION  660     /* version number * 100 */
qnx700/target/qnx7/usr/include/sys/neutrino.h:#define _NTO_VERSION  700     /* version number * 100 */
qnx710/target/qnx7/usr/include/sys/nto_version.h:#define _NTO_VERSION       710     /* version number * 100 */