This appendix describes how QNX Neutrino conforms to POSIX. It's based on the documentation submitted for the QNX Neutrino certification of compliance as a PSE52 Realtime Controller 1003.13-2003 System.
To set up an environment that conforms to POSIX, do the following:
qcc -V4.2.1,gcc_ntox86 -Wc,-std=c99