I am running on linux machine. How do I check if my use of CLOCK\_MONOTONIC is supported on my system? 
I am trying to use it in a program and getting strange results. The problem can be seen here:
<https://stackoverflow.com/questions/21774286/calculating-time-elapsed-in-c-using-monotonic-clock-results-dont-make-sense> 

I am starting to think that this is due to something weird happening behind the scenes?