Dependency mapping

Create a comprehensive dependency matrix for example: 

Dependency Type  Linux Standard  QNX Equivalent  Porting Strategy 
C Library  glibc QNX libc Patch GNU extensions 
Threading  pthreads (POSIX threads) QNX pthreads  Adjust scheduler policies 
IPC  Unix sockets  MsgSend()/MsgReceive() Rewrite communication layer 
Event Handling  epoll() poll() + ionotify() State tracking needed 
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