32 bit time_t

[Eric S. Raymond]

Achim Gratz <Stromeko at Nexgo.DE>:
> Quote from the document linked previously:
> 
> ==========
> The following is proposed:
> 
>     User code defines _TIME_BITS=64 to get 64-bit time support instead of
> the legacy 32-bit time.
> 
>     If glibc sees _TIME_BITS=64, then it defines __USE_TIME_BITS64 to
> indicate that time support is 64-bit rather than 32-bit.
> ==========
> 
> Configury needs to check whether it's looking at a glibc-based system that
> implements that.  I don't see any feature test macros discussed, so I guess
> you'd check the size of some suitable datatype with and without that define
> being present.

I don't think I see any reason not to just define that unconditionally.
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