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Bruno Haible
adfbfffa41
* doc/gnulib.texi (Function Substitutes): Add one section per header file. * doc/posix-functions/*.texi: Each of these files is now a subsection.
37 lines
1.1 KiB
Plaintext
37 lines
1.1 KiB
Plaintext
@node timezone
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@subsection @code{timezone}
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@findex timezone
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/timezone.html}
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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This variable's contents are unreliable if you use a geographical
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@env{TZ} setting like @code{TZ="America/Los_Angeles"}.
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@item
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This variable is missing (and instead, a function named @code{timezone} exists)
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on some platforms:
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FreeBSD 14.0, OpenBSD 5.7.
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@item
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This variable is called @code{_timezone} on some platforms:
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mingw with @code{-DNO_OLDNAMES}, MSVC.
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@item
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The address of this variable is not a compile-time constant on some platforms:
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mingw, MSVC.
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@item
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Native Windows platforms (mingw, MSVC) support only a subset of time
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zones supported by GNU or specified by POSIX@. @xref{tzset}.
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@end itemize
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This variable is vestigial: it is not needed and does not suffice in general.
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It is planned to be removed from a future version of POSIX@.
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A more portable way of getting the UTC offset is to use
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@code{strftime} with the @code{%z} format. @xref{strftime}.
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