C++ error: undefined reference to 'clock_gettime' and 'clock_settime'

Question

I am pretty new to Ubuntu, but I can\'t seem to get this to work. It works fine on my school computers and I don\'t know what I am not doing. I have checked usr/in

Answer 1

example:

c++ -Wall filefork.cpp -lrt -O2

For gcc version 4.6.1, -lrt must be after filefork.cpp otherwise you get a link error.

Some older gcc version doesn't care about the position.