On some systems time_t is 32 bit, causing build errors (with -Werror)
in get_epoch which attempts to implicitly convert an int64_t to a
time_t.
Fixes:
error: implicit conversion loses integer precision: 'int64_t' (aka 'long
long') to 'time_t' (aka 'int') [-Werror,-Wshorten-64-to-32]
332 | return mktime_internal(timeptr);
| ~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~
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