undefined reference to `timerfd_settime'

[carllerche]

I am getting an undefined symbol when running a binary compiled with rustc master on kernel version 2.6.18 (which is marked as being supported).

The undefined symbol definitely does not exist on that version of the kernel, which was added in version 2.6.25.

[alexcrichton]

Closing as a dupe of #13447 (it's got more tags over there), same bug though.