On Apple machines, call `clock_gettime()` instead of `timespec_get()`. macOS only introduced `timespec_get()` in version 10.15 (introduced approx two years ago, so in 2019), even though the function is from C11.
On Apple machines, call `clock_gettime()` instead of `timespec_get()`. macOS only introduced `timespec_get()` in version 10.15 (introduced approx two years ago, so in 2019), even though the function is from C11.