core.stdc.time

[Tony]

The documentation says:
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This module contains bindings to selected types and functions 
from the standard C header <time.h>. Note that this is not 
automatically generated, and may omit some types/functions from 
the original C header.
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It says "this is not automatically generated". I am seeing it on 
my Ubuntu Linux system. What would cause it to not be generated 
and what would be the solution?