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Hello.

I'm trying to get program call tree for code analys (something like):
main
--->func1
--------->func2
--->func3

In gcc there are great funtions as backtrace,backtrace_symbols,etc.
In windows stackwalk64.
I mentioned both of them for regular systems.

I've tried to found something like them in watcom (10.6 QNX4.25), but (for now) got nothing. After reading manual for wcc I get next two options for compilier
-ee - add __EPI to end of each function
-ep - add __PRO to start of each function
It seems that after building app and running it, I will get necessary profile "tree", but wlink refuse to link object file, printing "undifined symbol __PRO,__EPI".
In manual for wlink there are no any data about __PRO,__EPI.
So is it possible to use them? Are there any other functions that can help me to get function call depth?

That's not doing what you think it's doing.

What it's doing is the equivalent of -finstrument-functions - it expects you to define two functions __PRO and __EPI (prologue and epilogue) - these will get prepended/appended to every function.

You'd need to provide your own code as part of these functions to create your tree.