it supports only CLOCK_REALTIME :(
though CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID are defined too in bits/time.h, but clock_gettime() gives an error "Invalid argument" for these...
...
I need to develop timeout functionality in my code, which is not affected by system's time changes.Unfortunately I dont have CLOCK_MONOTONIC support in my OS.