Introduction and 64 bit time_t
Wed Aug 9 13:47:00 GMT 2017
Am Mittwoch, den 09.08.2017, 14:35 +0200 schrieb Corinna Vinschen:
> I'd prefer to use the type long on LP64 systems, but long long should
> work fine for all 32 bit systems (baring 32 bit Cygwin).
> However, a developer might want to design an embedded system still
> a 32 bit time_t for the time being, so there should be some build-
> switch for this case. We're talking about a 21 year timeframe, which
> may still be more than enough for some systems.
So we can agree on a build-time switch like --enable-long-long-time-t
which defaults to off? That way the compilation of newlib itself could
be handled easily, but for the compilation of applications using time_t
I'm facing (at least) two possible implementations:
1. Having the user define something before including time.h in order to
select the non-default long long, e.g.
2. Rewriting either time.h or sys/types.h at build-time depending on
the configure switch to define this value or, even simpler, rewrite
the definition of _TIME_T_ at build-time.
Am I correct here and which of these implementations would you prefer?
Or am I missing something completely here?
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