I'm working on a packet filter using io-pkt, and through several other messages in various discussion boards, it seems 
that the _KERNEL flag is required to expose certain functions (some of the m_xxx functions for instance).  However, sys/
malloc.h specifically throws a warning message when both __QNXNTO__ and _KERNEL are defined. Is this actually an issue? 
I don't see where __QNXNTO__ is being defined (my guess is by qcc?).  I have a feeling I'm missing something fundamental
.